wireprotov2: client support for following content redirects

And with the server actually sending content redirects, it is finally
time to implement client support for following them!

When a redirect response is seen, we wait until all data for that
request has been received (it should be nearly immediate since no
data is expected to follow the redirect message). Then we use
a URL opener to make a request. We stuff that response into the
client handler and construct a new response object to track it.

When readdata() is called for servicing requests, we attempt to
read data from the first redirected response. During data reading,
data is processed similarly to as if it came from a frame payload.

The existing test for the functionality demonstrates the client
transparently following the redirect and obtaining the command
response data from an alternate URL!

There is still plenty of work to do here, including shoring up
testing. I'm not convinced things will work in the presence of
multiple redirect responses. And we don't yet implement support
for integrity verification or configuring server certificates
to validate the connection. But it's a start. And it should enable
us to start experimenting with "real" caches.

Differential Revision: https://phab.mercurial-scm.org/D4778

mercurial/httppeer.py

@@ -1,976 +1,978
 # httppeer.py - HTTP repository proxy classes for mercurial
 #
 # Copyright 2005, 2006 Matt Mackall <[e-mail]>
 # Copyright 2006 Vadim Gelfer <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 from __future__ import absolute_import
 
 import errno
 import io
 import os
 import socket
 import struct
 import weakref
 
 from .i18n import _
 from . import (
     bundle2,
     error,
     httpconnection,
     pycompat,
     repository,
     statichttprepo,
     url as urlmod,
     util,
     wireprotoframing,
     wireprototypes,
     wireprotov1peer,
     wireprotov2peer,
     wireprotov2server,
 )
 from .utils import (
     cborutil,
     interfaceutil,
     stringutil,
 )
 
 httplib = util.httplib
 urlerr = util.urlerr
 urlreq = util.urlreq
 
 def encodevalueinheaders(value, header, limit):
     """Encode a string value into multiple HTTP headers.
 
     ``value`` will be encoded into 1 or more HTTP headers with the names
     ``header-<N>`` where ``<N>`` is an integer starting at 1. Each header
     name + value will be at most ``limit`` bytes long.
 
     Returns an iterable of 2-tuples consisting of header names and
     values as native strings.
     """
     # HTTP Headers are ASCII. Python 3 requires them to be unicodes,
     # not bytes. This function always takes bytes in as arguments.
     fmt = pycompat.strurl(header) + r'-%s'
     # Note: it is *NOT* a bug that the last bit here is a bytestring
     # and not a unicode: we're just getting the encoded length anyway,
     # and using an r-string to make it portable between Python 2 and 3
     # doesn't work because then the \r is a literal backslash-r
     # instead of a carriage return.
     valuelen = limit - len(fmt % r'000') - len(': \r\n')
     result = []
 
     n = 0
     for i in pycompat.xrange(0, len(value), valuelen):
         n += 1
         result.append((fmt % str(n), pycompat.strurl(value[i:i + valuelen])))
 
     return result
 
 class _multifile(object):
     def __init__(self, *fileobjs):
         for f in fileobjs:
             if not util.safehasattr(f, 'length'):
                 raise ValueError(
                     '_multifile only supports file objects that '
                     'have a length but this one does not:', type(f), f)
         self._fileobjs = fileobjs
         self._index = 0
 
     @property
     def length(self):
         return sum(f.length for f in self._fileobjs)
 
     def read(self, amt=None):
         if amt <= 0:
             return ''.join(f.read() for f in self._fileobjs)
         parts = []
         while amt and self._index < len(self._fileobjs):
             parts.append(self._fileobjs[self._index].read(amt))
             got = len(parts[-1])
             if got < amt:
                 self._index += 1
             amt -= got
         return ''.join(parts)
 
     def seek(self, offset, whence=os.SEEK_SET):
         if whence != os.SEEK_SET:
             raise NotImplementedError(
                 '_multifile does not support anything other'
                 ' than os.SEEK_SET for whence on seek()')
         if offset != 0:
             raise NotImplementedError(
                 '_multifile only supports seeking to start, but that '
                 'could be fixed if you need it')
         for f in self._fileobjs:
             f.seek(0)
         self._index = 0
 
 def makev1commandrequest(ui, requestbuilder, caps, capablefn,
                          repobaseurl, cmd, args):
     """Make an HTTP request to run a command for a version 1 client.
 
     ``caps`` is a set of known server capabilities. The value may be
     None if capabilities are not yet known.
 
     ``capablefn`` is a function to evaluate a capability.
 
     ``cmd``, ``args``, and ``data`` define the command, its arguments, and
     raw data to pass to it.
     """
     if cmd == 'pushkey':
         args['data'] = ''
     data = args.pop('data', None)
     headers = args.pop('headers', {})
 
     ui.debug("sending %s command\n" % cmd)
     q = [('cmd', cmd)]
     headersize = 0
     # Important: don't use self.capable() here or else you end up
     # with infinite recursion when trying to look up capabilities
     # for the first time.
     postargsok = caps is not None and 'httppostargs' in caps
 
     # Send arguments via POST.
     if postargsok and args:
         strargs = urlreq.urlencode(sorted(args.items()))
         if not data:
             data = strargs
         else:
             if isinstance(data, bytes):
                 i = io.BytesIO(data)
                 i.length = len(data)
                 data = i
             argsio = io.BytesIO(strargs)
             argsio.length = len(strargs)
             data = _multifile(argsio, data)
         headers[r'X-HgArgs-Post'] = len(strargs)
     elif args:
         # Calling self.capable() can infinite loop if we are calling
         # "capabilities". But that command should never accept wire
         # protocol arguments. So this should never happen.
         assert cmd != 'capabilities'
         httpheader = capablefn('httpheader')
         if httpheader:
             headersize = int(httpheader.split(',', 1)[0])
 
         # Send arguments via HTTP headers.
         if headersize > 0:
             # The headers can typically carry more data than the URL.
             encargs = urlreq.urlencode(sorted(args.items()))
             for header, value in encodevalueinheaders(encargs, 'X-HgArg',
                                                       headersize):
                 headers[header] = value
         # Send arguments via query string (Mercurial <1.9).
         else:
             q += sorted(args.items())
 
     qs = '?%s' % urlreq.urlencode(q)
     cu = "%s%s" % (repobaseurl, qs)
     size = 0
     if util.safehasattr(data, 'length'):
         size = data.length
     elif data is not None:
         size = len(data)
     if data is not None and r'Content-Type' not in headers:
         headers[r'Content-Type'] = r'application/mercurial-0.1'
 
     # Tell the server we accept application/mercurial-0.2 and multiple
     # compression formats if the server is capable of emitting those
     # payloads.
     # Note: Keep this set empty by default, as client advertisement of
     # protocol parameters should only occur after the handshake.
     protoparams = set()
 
     mediatypes = set()
     if caps is not None:
         mt = capablefn('httpmediatype')
         if mt:
             protoparams.add('0.1')
             mediatypes = set(mt.split(','))
 
         protoparams.add('partial-pull')
 
     if '0.2tx' in mediatypes:
         protoparams.add('0.2')
 
     if '0.2tx' in mediatypes and capablefn('compression'):
         # We /could/ compare supported compression formats and prune
         # non-mutually supported or error if nothing is mutually supported.
         # For now, send the full list to the server and have it error.
         comps = [e.wireprotosupport().name for e in
                  util.compengines.supportedwireengines(util.CLIENTROLE)]
         protoparams.add('comp=%s' % ','.join(comps))
 
     if protoparams:
         protoheaders = encodevalueinheaders(' '.join(sorted(protoparams)),
                                             'X-HgProto',
                                             headersize or 1024)
         for header, value in protoheaders:
             headers[header] = value
 
     varyheaders = []
     for header in headers:
         if header.lower().startswith(r'x-hg'):
             varyheaders.append(header)
 
     if varyheaders:
         headers[r'Vary'] = r','.join(sorted(varyheaders))
 
     req = requestbuilder(pycompat.strurl(cu), data, headers)
 
     if data is not None:
         ui.debug("sending %d bytes\n" % size)
         req.add_unredirected_header(r'Content-Length', r'%d' % size)
 
     return req, cu, qs
 
 def _reqdata(req):
     """Get request data, if any. If no data, returns None."""
     if pycompat.ispy3:
         return req.data
     if not req.has_data():
         return None
     return req.get_data()
 
 def sendrequest(ui, opener, req):
     """Send a prepared HTTP request.
 
     Returns the response object.
     """
     dbg = ui.debug
     if (ui.debugflag
         and ui.configbool('devel', 'debug.peer-request')):
         line = 'devel-peer-request: %s\n'
         dbg(line % '%s %s' % (pycompat.bytesurl(req.get_method()),
                               pycompat.bytesurl(req.get_full_url())))
         hgargssize = None
 
         for header, value in sorted(req.header_items()):
             header = pycompat.bytesurl(header)
             value = pycompat.bytesurl(value)
             if header.startswith('X-hgarg-'):
                 if hgargssize is None:
                     hgargssize = 0
                 hgargssize += len(value)
             else:
                 dbg(line % '  %s %s' % (header, value))
 
         if hgargssize is not None:
             dbg(line % '  %d bytes of commands arguments in headers'
                 % hgargssize)
         data = _reqdata(req)
         if data is not None:
             length = getattr(data, 'length', None)
             if length is None:
                 length = len(data)
             dbg(line % '  %d bytes of data' % length)
 
         start = util.timer()
 
     res = None
     try:
         res = opener.open(req)
     except urlerr.httperror as inst:
         if inst.code == 401:
             raise error.Abort(_('authorization failed'))
         raise
     except httplib.HTTPException as inst:
         ui.debug('http error requesting %s\n' %
                  util.hidepassword(req.get_full_url()))
         ui.traceback()
         raise IOError(None, inst)
     finally:
         if ui.debugflag and ui.configbool('devel', 'debug.peer-request'):
             code = res.code if res else -1
             dbg(line % '  finished in %.4f seconds (%d)'
                 % (util.timer() - start, code))
 
     # Insert error handlers for common I/O failures.
     urlmod.wrapresponse(res)
 
     return res
 
 class RedirectedRepoError(error.RepoError):
     def __init__(self, msg, respurl):
         super(RedirectedRepoError, self).__init__(msg)
         self.respurl = respurl
 
 def parsev1commandresponse(ui, baseurl, requrl, qs, resp, compressible,
                            allowcbor=False):
     # record the url we got redirected to
     redirected = False
     respurl = pycompat.bytesurl(resp.geturl())
     if respurl.endswith(qs):
         respurl = respurl[:-len(qs)]
         qsdropped = False
     else:
         qsdropped = True
 
     if baseurl.rstrip('/') != respurl.rstrip('/'):
         redirected = True
         if not ui.quiet:
             ui.warn(_('real URL is %s\n') % respurl)
 
     try:
         proto = pycompat.bytesurl(resp.getheader(r'content-type', r''))
     except AttributeError:
         proto = pycompat.bytesurl(resp.headers.get(r'content-type', r''))
 
     safeurl = util.hidepassword(baseurl)
     if proto.startswith('application/hg-error'):
         raise error.OutOfBandError(resp.read())
 
     # Pre 1.0 versions of Mercurial used text/plain and
     # application/hg-changegroup. We don't support such old servers.
     if not proto.startswith('application/mercurial-'):
         ui.debug("requested URL: '%s'\n" % util.hidepassword(requrl))
         msg = _("'%s' does not appear to be an hg repository:\n"
                 "---%%<--- (%s)\n%s\n---%%<---\n") % (
             safeurl, proto or 'no content-type', resp.read(1024))
 
         # Some servers may strip the query string from the redirect. We
         # raise a special error type so callers can react to this specially.
         if redirected and qsdropped:
             raise RedirectedRepoError(msg, respurl)
         else:
             raise error.RepoError(msg)
 
     try:
         subtype = proto.split('-', 1)[1]
 
         # Unless we end up supporting CBOR in the legacy wire protocol,
         # this should ONLY be encountered for the initial capabilities
         # request during handshake.
         if subtype == 'cbor':
             if allowcbor:
                 return respurl, proto, resp
             else:
                 raise error.RepoError(_('unexpected CBOR response from '
                                         'server'))
 
         version_info = tuple([int(n) for n in subtype.split('.')])
     except ValueError:
         raise error.RepoError(_("'%s' sent a broken Content-Type "
                                 "header (%s)") % (safeurl, proto))
 
     # TODO consider switching to a decompression reader that uses
     # generators.
     if version_info == (0, 1):
         if compressible:
             resp = util.compengines['zlib'].decompressorreader(resp)
 
     elif version_info == (0, 2):
         # application/mercurial-0.2 always identifies the compression
         # engine in the payload header.
         elen = struct.unpack('B', util.readexactly(resp, 1))[0]
         ename = util.readexactly(resp, elen)
         engine = util.compengines.forwiretype(ename)
 
         resp = engine.decompressorreader(resp)
     else:
         raise error.RepoError(_("'%s' uses newer protocol %s") %
                               (safeurl, subtype))
 
     return respurl, proto, resp
 
 class httppeer(wireprotov1peer.wirepeer):
     def __init__(self, ui, path, url, opener, requestbuilder, caps):
         self.ui = ui
         self._path = path
         self._url = url
         self._caps = caps
         self._urlopener = opener
         self._requestbuilder = requestbuilder
 
     def __del__(self):
         for h in self._urlopener.handlers:
             h.close()
             getattr(h, "close_all", lambda: None)()
 
     # Begin of ipeerconnection interface.
 
     def url(self):
         return self._path
 
     def local(self):
         return None
 
     def peer(self):
         return self
 
     def canpush(self):
         return True
 
     def close(self):
         pass
 
     # End of ipeerconnection interface.
 
     # Begin of ipeercommands interface.
 
     def capabilities(self):
         return self._caps
 
     # End of ipeercommands interface.
 
     def _callstream(self, cmd, _compressible=False, **args):
         args = pycompat.byteskwargs(args)
 
         req, cu, qs = makev1commandrequest(self.ui, self._requestbuilder,
                                            self._caps, self.capable,
                                            self._url, cmd, args)
 
         resp = sendrequest(self.ui, self._urlopener, req)
 
         self._url, ct, resp = parsev1commandresponse(self.ui, self._url, cu, qs,
                                                      resp, _compressible)
 
         return resp
 
     def _call(self, cmd, **args):
         fp = self._callstream(cmd, **args)
         try:
             return fp.read()
         finally:
             # if using keepalive, allow connection to be reused
             fp.close()
 
     def _callpush(self, cmd, cg, **args):
         # have to stream bundle to a temp file because we do not have
         # http 1.1 chunked transfer.
 
         types = self.capable('unbundle')
         try:
             types = types.split(',')
         except AttributeError:
             # servers older than d1b16a746db6 will send 'unbundle' as a
             # boolean capability. They only support headerless/uncompressed
             # bundles.
             types = [""]
         for x in types:
             if x in bundle2.bundletypes:
                 type = x
                 break
 
         tempname = bundle2.writebundle(self.ui, cg, None, type)
         fp = httpconnection.httpsendfile(self.ui, tempname, "rb")
         headers = {r'Content-Type': r'application/mercurial-0.1'}
 
         try:
             r = self._call(cmd, data=fp, headers=headers, **args)
             vals = r.split('\n', 1)
             if len(vals) < 2:
                 raise error.ResponseError(_("unexpected response:"), r)
             return vals
         except urlerr.httperror:
             # Catch and re-raise these so we don't try and treat them
             # like generic socket errors. They lack any values in
             # .args on Python 3 which breaks our socket.error block.
             raise
         except socket.error as err:
             if err.args[0] in (errno.ECONNRESET, errno.EPIPE):
                 raise error.Abort(_('push failed: %s') % err.args[1])
             raise error.Abort(err.args[1])
         finally:
             fp.close()
             os.unlink(tempname)
 
     def _calltwowaystream(self, cmd, fp, **args):
         fh = None
         fp_ = None
         filename = None
         try:
             # dump bundle to disk
             fd, filename = pycompat.mkstemp(prefix="hg-bundle-", suffix=".hg")
             fh = os.fdopen(fd, r"wb")
             d = fp.read(4096)
             while d:
                 fh.write(d)
                 d = fp.read(4096)
             fh.close()
             # start http push
             fp_ = httpconnection.httpsendfile(self.ui, filename, "rb")
             headers = {r'Content-Type': r'application/mercurial-0.1'}
             return self._callstream(cmd, data=fp_, headers=headers, **args)
         finally:
             if fp_ is not None:
                 fp_.close()
             if fh is not None:
                 fh.close()
                 os.unlink(filename)
 
     def _callcompressable(self, cmd, **args):
         return self._callstream(cmd, _compressible=True, **args)
 
     def _abort(self, exception):
         raise exception
 
 def sendv2request(ui, opener, requestbuilder, apiurl, permission, requests,
                   redirect):
     reactor = wireprotoframing.clientreactor(hasmultiplesend=False,
                                              buffersends=True)
 
-    handler = wireprotov2peer.clienthandler(ui, reactor)
+    handler = wireprotov2peer.clienthandler(ui, reactor,
+                                            opener=opener,
+                                            requestbuilder=requestbuilder)
 
     url = '%s/%s' % (apiurl, permission)
 
     if len(requests) > 1:
         url += '/multirequest'
     else:
         url += '/%s' % requests[0][0]
 
     ui.debug('sending %d commands\n' % len(requests))
     for command, args, f in requests:
         ui.debug('sending command %s: %s\n' % (
             command, stringutil.pprint(args, indent=2)))
         assert not list(handler.callcommand(command, args, f,
                                             redirect=redirect))
 
     # TODO stream this.
     body = b''.join(map(bytes, handler.flushcommands()))
 
     # TODO modify user-agent to reflect v2
     headers = {
         r'Accept': wireprotov2server.FRAMINGTYPE,
         r'Content-Type': wireprotov2server.FRAMINGTYPE,
     }
 
     req = requestbuilder(pycompat.strurl(url), body, headers)
     req.add_unredirected_header(r'Content-Length', r'%d' % len(body))
 
     try:
         res = opener.open(req)
     except urlerr.httperror as e:
         if e.code == 401:
             raise error.Abort(_('authorization failed'))
 
         raise
     except httplib.HTTPException as e:
         ui.traceback()
         raise IOError(None, e)
 
     return handler, res
 
 class queuedcommandfuture(pycompat.futures.Future):
     """Wraps result() on command futures to trigger submission on call."""
 
     def result(self, timeout=None):
         if self.done():
             return pycompat.futures.Future.result(self, timeout)
 
         self._peerexecutor.sendcommands()
 
         # sendcommands() will restore the original __class__ and self.result
         # will resolve to Future.result.
         return self.result(timeout)
 
 @interfaceutil.implementer(repository.ipeercommandexecutor)
 class httpv2executor(object):
     def __init__(self, ui, opener, requestbuilder, apiurl, descriptor,
                  redirect):
         self._ui = ui
         self._opener = opener
         self._requestbuilder = requestbuilder
         self._apiurl = apiurl
         self._descriptor = descriptor
         self._redirect = redirect
         self._sent = False
         self._closed = False
         self._neededpermissions = set()
         self._calls = []
         self._futures = weakref.WeakSet()
         self._responseexecutor = None
         self._responsef = None
 
     def __enter__(self):
         return self
 
     def __exit__(self, exctype, excvalue, exctb):
         self.close()
 
     def callcommand(self, command, args):
         if self._sent:
             raise error.ProgrammingError('callcommand() cannot be used after '
                                          'commands are sent')
 
         if self._closed:
             raise error.ProgrammingError('callcommand() cannot be used after '
                                          'close()')
 
         # The service advertises which commands are available. So if we attempt
         # to call an unknown command or pass an unknown argument, we can screen
         # for this.
         if command not in self._descriptor['commands']:
             raise error.ProgrammingError(
                 'wire protocol command %s is not available' % command)
 
         cmdinfo = self._descriptor['commands'][command]
         unknownargs = set(args.keys()) - set(cmdinfo.get('args', {}))
 
         if unknownargs:
             raise error.ProgrammingError(
                 'wire protocol command %s does not accept argument: %s' % (
                     command, ', '.join(sorted(unknownargs))))
 
         self._neededpermissions |= set(cmdinfo['permissions'])
 
         # TODO we /could/ also validate types here, since the API descriptor
         # includes types...
 
         f = pycompat.futures.Future()
 
         # Monkeypatch it so result() triggers sendcommands(), otherwise result()
         # could deadlock.
         f.__class__ = queuedcommandfuture
         f._peerexecutor = self
 
         self._futures.add(f)
         self._calls.append((command, args, f))
 
         return f
 
     def sendcommands(self):
         if self._sent:
             return
 
         if not self._calls:
             return
 
         self._sent = True
 
         # Unhack any future types so caller sees a clean type and so we
         # break reference cycle.
         for f in self._futures:
             if isinstance(f, queuedcommandfuture):
                 f.__class__ = pycompat.futures.Future
                 f._peerexecutor = None
 
         # Mark the future as running and filter out cancelled futures.
         calls = [(command, args, f)
                  for command, args, f in self._calls
                  if f.set_running_or_notify_cancel()]
 
         # Clear out references, prevent improper object usage.
         self._calls = None
 
         if not calls:
             return
 
         permissions = set(self._neededpermissions)
 
         if 'push' in permissions and 'pull' in permissions:
             permissions.remove('pull')
 
         if len(permissions) > 1:
             raise error.RepoError(_('cannot make request requiring multiple '
                                     'permissions: %s') %
                                   _(', ').join(sorted(permissions)))
 
         permission = {
             'push': 'rw',
             'pull': 'ro',
         }[permissions.pop()]
 
         handler, resp = sendv2request(
             self._ui, self._opener, self._requestbuilder, self._apiurl,
             permission, calls, self._redirect)
 
         # TODO we probably want to validate the HTTP code, media type, etc.
 
         self._responseexecutor = pycompat.futures.ThreadPoolExecutor(1)
         self._responsef = self._responseexecutor.submit(self._handleresponse,
                                                         handler, resp)
 
     def close(self):
         if self._closed:
             return
 
         self.sendcommands()
 
         self._closed = True
 
         if not self._responsef:
             return
 
         # TODO ^C here may not result in immediate program termination.
 
         try:
             self._responsef.result()
         finally:
             self._responseexecutor.shutdown(wait=True)
             self._responsef = None
             self._responseexecutor = None
 
             # If any of our futures are still in progress, mark them as
             # errored, otherwise a result() could wait indefinitely.
             for f in self._futures:
                 if not f.done():
                     f.set_exception(error.ResponseError(
                         _('unfulfilled command response')))
 
             self._futures = None
 
     def _handleresponse(self, handler, resp):
         # Called in a thread to read the response.
 
         while handler.readdata(resp):
             pass
 
 # TODO implement interface for version 2 peers
 @interfaceutil.implementer(repository.ipeerconnection,
                            repository.ipeercapabilities,
                            repository.ipeerrequests)
 class httpv2peer(object):
     def __init__(self, ui, repourl, apipath, opener, requestbuilder,
                  apidescriptor):
         self.ui = ui
 
         if repourl.endswith('/'):
             repourl = repourl[:-1]
 
         self._url = repourl
         self._apipath = apipath
         self._apiurl = '%s/%s' % (repourl, apipath)
         self._opener = opener
         self._requestbuilder = requestbuilder
         self._descriptor = apidescriptor
 
         self._redirect = wireprotov2peer.supportedredirects(ui, apidescriptor)
 
     # Start of ipeerconnection.
 
     def url(self):
         return self._url
 
     def local(self):
         return None
 
     def peer(self):
         return self
 
     def canpush(self):
         # TODO change once implemented.
         return False
 
     def close(self):
         pass
 
     # End of ipeerconnection.
 
     # Start of ipeercapabilities.
 
     def capable(self, name):
         # The capabilities used internally historically map to capabilities
         # advertised from the "capabilities" wire protocol command. However,
         # version 2 of that command works differently.
 
         # Maps to commands that are available.
         if name in ('branchmap', 'getbundle', 'known', 'lookup', 'pushkey'):
             return True
 
         # Other concepts.
         if name in ('bundle2'):
             return True
 
         # Alias command-* to presence of command of that name.
         if name.startswith('command-'):
             return name[len('command-'):] in self._descriptor['commands']
 
         return False
 
     def requirecap(self, name, purpose):
         if self.capable(name):
             return
 
         raise error.CapabilityError(
             _('cannot %s; client or remote repository does not support the %r '
               'capability') % (purpose, name))
 
     # End of ipeercapabilities.
 
     def _call(self, name, **args):
         with self.commandexecutor() as e:
             return e.callcommand(name, args).result()
 
     def commandexecutor(self):
         return httpv2executor(self.ui, self._opener, self._requestbuilder,
                               self._apiurl, self._descriptor, self._redirect)
 
 # Registry of API service names to metadata about peers that handle it.
 #
 # The following keys are meaningful:
 #
 # init
 #    Callable receiving (ui, repourl, servicepath, opener, requestbuilder,
 #                        apidescriptor) to create a peer.
 #
 # priority
 #    Integer priority for the service. If we could choose from multiple
 #    services, we choose the one with the highest priority.
 API_PEERS = {
     wireprototypes.HTTP_WIREPROTO_V2: {
         'init': httpv2peer,
         'priority': 50,
     },
 }
 
 def performhandshake(ui, url, opener, requestbuilder):
     # The handshake is a request to the capabilities command.
 
     caps = None
     def capable(x):
         raise error.ProgrammingError('should not be called')
 
     args = {}
 
     # The client advertises support for newer protocols by adding an
     # X-HgUpgrade-* header with a list of supported APIs and an
     # X-HgProto-* header advertising which serializing formats it supports.
     # We only support the HTTP version 2 transport and CBOR responses for
     # now.
     advertisev2 = ui.configbool('experimental', 'httppeer.advertise-v2')
 
     if advertisev2:
         args['headers'] = {
             r'X-HgProto-1': r'cbor',
         }
 
         args['headers'].update(
             encodevalueinheaders(' '.join(sorted(API_PEERS)),
                                  'X-HgUpgrade',
                                  # We don't know the header limit this early.
                                  # So make it small.
                                  1024))
 
     req, requrl, qs = makev1commandrequest(ui, requestbuilder, caps,
                                            capable, url, 'capabilities',
                                            args)
     resp = sendrequest(ui, opener, req)
 
     # The server may redirect us to the repo root, stripping the
     # ?cmd=capabilities query string from the URL. The server would likely
     # return HTML in this case and ``parsev1commandresponse()`` would raise.
     # We catch this special case and re-issue the capabilities request against
     # the new URL.
     #
     # We should ideally not do this, as a redirect that drops the query
     # string from the URL is arguably a server bug. (Garbage in, garbage out).
     # However,  Mercurial clients for several years appeared to handle this
     # issue without behavior degradation. And according to issue 5860, it may
     # be a longstanding bug in some server implementations. So we allow a
     # redirect that drops the query string to "just work."
     try:
         respurl, ct, resp = parsev1commandresponse(ui, url, requrl, qs, resp,
                                                    compressible=False,
                                                    allowcbor=advertisev2)
     except RedirectedRepoError as e:
         req, requrl, qs = makev1commandrequest(ui, requestbuilder, caps,
                                                capable, e.respurl,
                                                'capabilities', args)
         resp = sendrequest(ui, opener, req)
         respurl, ct, resp = parsev1commandresponse(ui, url, requrl, qs, resp,
                                                    compressible=False,
                                                    allowcbor=advertisev2)
 
     try:
         rawdata = resp.read()
     finally:
         resp.close()
 
     if not ct.startswith('application/mercurial-'):
         raise error.ProgrammingError('unexpected content-type: %s' % ct)
 
     if advertisev2:
         if ct == 'application/mercurial-cbor':
             try:
                 info = cborutil.decodeall(rawdata)[0]
             except cborutil.CBORDecodeError:
                 raise error.Abort(_('error decoding CBOR from remote server'),
                                   hint=_('try again and consider contacting '
                                          'the server operator'))
 
         # We got a legacy response. That's fine.
         elif ct in ('application/mercurial-0.1', 'application/mercurial-0.2'):
             info = {
                 'v1capabilities': set(rawdata.split())
             }
 
         else:
             raise error.RepoError(
                 _('unexpected response type from server: %s') % ct)
     else:
         info = {
             'v1capabilities': set(rawdata.split())
         }
 
     return respurl, info
 
 def makepeer(ui, path, opener=None, requestbuilder=urlreq.request):
     """Construct an appropriate HTTP peer instance.
 
     ``opener`` is an ``url.opener`` that should be used to establish
     connections, perform HTTP requests.
 
     ``requestbuilder`` is the type used for constructing HTTP requests.
     It exists as an argument so extensions can override the default.
     """
     u = util.url(path)
     if u.query or u.fragment:
         raise error.Abort(_('unsupported URL component: "%s"') %
                           (u.query or u.fragment))
 
     # urllib cannot handle URLs with embedded user or passwd.
     url, authinfo = u.authinfo()
     ui.debug('using %s\n' % url)
 
     opener = opener or urlmod.opener(ui, authinfo)
 
     respurl, info = performhandshake(ui, url, opener, requestbuilder)
 
     # Given the intersection of APIs that both we and the server support,
     # sort by their advertised priority and pick the first one.
     #
     # TODO consider making this request-based and interface driven. For
     # example, the caller could say "I want a peer that does X." It's quite
     # possible that not all peers would do that. Since we know the service
     # capabilities, we could filter out services not meeting the
     # requirements. Possibly by consulting the interfaces defined by the
     # peer type.
     apipeerchoices = set(info.get('apis', {}).keys()) & set(API_PEERS.keys())
 
     preferredchoices = sorted(apipeerchoices,
                               key=lambda x: API_PEERS[x]['priority'],
                               reverse=True)
 
     for service in preferredchoices:
         apipath = '%s/%s' % (info['apibase'].rstrip('/'), service)
 
         return API_PEERS[service]['init'](ui, respurl, apipath, opener,
                                           requestbuilder,
                                           info['apis'][service])
 
     # Failed to construct an API peer. Fall back to legacy.
     return httppeer(ui, path, respurl, opener, requestbuilder,
                     info['v1capabilities'])
 
 def instance(ui, path, create, intents=None, createopts=None):
     if create:
         raise error.Abort(_('cannot create new http repository'))
     try:
         if path.startswith('https:') and not urlmod.has_https:
             raise error.Abort(_('Python support for SSL and HTTPS '
                                 'is not installed'))
 
         inst = makepeer(ui, path)
 
         return inst
     except error.RepoError as httpexception:
         try:
             r = statichttprepo.instance(ui, "static-" + path, create)
             ui.note(_('(falling back to static-http)\n'))
             return r
         except error.RepoError:
             raise httpexception # use the original http RepoError instead

mercurial/wireprotov2peer.py

@@ -1,372 +1,498
 # wireprotov2peer.py - client side code for wire protocol version 2
 #
 # Copyright 2018 Gregory Szorc <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 from __future__ import absolute_import
 
 import threading
 
 from .i18n import _
 from . import (
     encoding,
     error,
+    pycompat,
     sslutil,
+    url as urlmod,
+    util,
     wireprotoframing,
+    wireprototypes,
 )
 from .utils import (
     cborutil,
 )
 
 def formatrichmessage(atoms):
     """Format an encoded message from the framing protocol."""
 
     chunks = []
 
     for atom in atoms:
         msg = _(atom[b'msg'])
 
         if b'args' in atom:
             msg = msg % tuple(atom[b'args'])
 
         chunks.append(msg)
 
     return b''.join(chunks)
 
 SUPPORTED_REDIRECT_PROTOCOLS = {
     b'http',
     b'https',
 }
 
 SUPPORTED_CONTENT_HASHES = {
     b'sha1',
     b'sha256',
 }
 
 def redirecttargetsupported(ui, target):
     """Determine whether a redirect target entry is supported.
 
     ``target`` should come from the capabilities data structure emitted by
     the server.
     """
     if target.get(b'protocol') not in SUPPORTED_REDIRECT_PROTOCOLS:
         ui.note(_('(remote redirect target %s uses unsupported protocol: %s)\n')
                 % (target[b'name'], target.get(b'protocol', b'')))
         return False
 
     if target.get(b'snirequired') and not sslutil.hassni:
         ui.note(_('(redirect target %s requires SNI, which is unsupported)\n') %
                 target[b'name'])
         return False
 
     if b'tlsversions' in target:
         tlsversions = set(target[b'tlsversions'])
         supported = set()
 
         for v in sslutil.supportedprotocols:
             assert v.startswith(b'tls')
             supported.add(v[3:])
 
         if not tlsversions & supported:
             ui.note(_('(remote redirect target %s requires unsupported TLS '
                       'versions: %s)\n') % (
                 target[b'name'], b', '.join(sorted(tlsversions))))
             return False
 
     ui.note(_('(remote redirect target %s is compatible)\n') % target[b'name'])
 
     return True
 
 def supportedredirects(ui, apidescriptor):
     """Resolve the "redirect" command request key given an API descriptor.
 
     Given an API descriptor returned by the server, returns a data structure
     that can be used in hte "redirect" field of command requests to advertise
     support for compatible redirect targets.
 
     Returns None if no redirect targets are remotely advertised or if none are
     supported.
     """
     if not apidescriptor or b'redirect' not in apidescriptor:
         return None
 
     targets = [t[b'name'] for t in apidescriptor[b'redirect'][b'targets']
                if redirecttargetsupported(ui, t)]
 
     hashes = [h for h in apidescriptor[b'redirect'][b'hashes']
               if h in SUPPORTED_CONTENT_HASHES]
 
     return {
         b'targets': targets,
         b'hashes': hashes,
     }
 
 class commandresponse(object):
     """Represents the response to a command request.
 
     Instances track the state of the command and hold its results.
 
     An external entity is required to update the state of the object when
     events occur.
     """
 
-    def __init__(self, requestid, command):
+    def __init__(self, requestid, command, fromredirect=False):
         self.requestid = requestid
         self.command = command
+        self.fromredirect = fromredirect
 
         # Whether all remote input related to this command has been
         # received.
         self._inputcomplete = False
 
         # We have a lock that is acquired when important object state is
         # mutated. This is to prevent race conditions between 1 thread
         # sending us new data and another consuming it.
         self._lock = threading.RLock()
 
         # An event is set when state of the object changes. This event
         # is waited on by the generator emitting objects.
         self._serviceable = threading.Event()
 
         self._pendingevents = []
         self._decoder = cborutil.bufferingdecoder()
         self._seeninitial = False
+        self._redirect = None
 
     def _oninputcomplete(self):
         with self._lock:
             self._inputcomplete = True
             self._serviceable.set()
 
     def _onresponsedata(self, data):
         available, readcount, wanted = self._decoder.decode(data)
 
         if not available:
             return
 
         with self._lock:
             for o in self._decoder.getavailable():
-                if not self._seeninitial:
+                if not self._seeninitial and not self.fromredirect:
                     self._handleinitial(o)
                     continue
 
+                # We should never see an object after a content redirect,
+                # as the spec says the main status object containing the
+                # content redirect is the only object in the stream. Fail
+                # if we see a misbehaving server.
+                if self._redirect:
+                    raise error.Abort(_('received unexpected response data '
+                                        'after content redirect; the remote is '
+                                        'buggy'))
+
                 self._pendingevents.append(o)
 
             self._serviceable.set()
 
     def _handleinitial(self, o):
         self._seeninitial = True
         if o[b'status'] == b'ok':
             return
 
         elif o[b'status'] == b'redirect':
-            raise error.Abort(_('redirect responses not yet supported'))
+            l = o[b'location']
+            self._redirect = wireprototypes.alternatelocationresponse(
+                url=l[b'url'],
+                mediatype=l[b'mediatype'],
+                size=l.get(b'size'),
+                fullhashes=l.get(b'fullhashes'),
+                fullhashseed=l.get(b'fullhashseed'),
+                serverdercerts=l.get(b'serverdercerts'),
+                servercadercerts=l.get(b'servercadercerts'))
+            return
 
         atoms = [{'msg': o[b'error'][b'message']}]
         if b'args' in o[b'error']:
             atoms[0]['args'] = o[b'error'][b'args']
 
         raise error.RepoError(formatrichmessage(atoms))
 
     def objects(self):
         """Obtained decoded objects from this response.
 
         This is a generator of data structures that were decoded from the
         command response.
 
         Obtaining the next member of the generator may block due to waiting
         on external data to become available.
 
         If the server encountered an error in the middle of serving the data
         or if another error occurred, an exception may be raised when
         advancing the generator.
         """
         while True:
             # TODO this can infinite loop if self._inputcomplete is never
             # set. We likely want to tie the lifetime of this object/state
             # to that of the background thread receiving frames and updating
             # our state.
             self._serviceable.wait(1.0)
 
             with self._lock:
                 self._serviceable.clear()
 
                 # Make copies because objects could be mutated during
                 # iteration.
                 stop = self._inputcomplete
                 pending = list(self._pendingevents)
                 self._pendingevents[:] = []
 
             for o in pending:
                 yield o
 
             if stop:
                 break
 
 class clienthandler(object):
     """Object to handle higher-level client activities.
 
     The ``clientreactor`` is used to hold low-level state about the frame-based
     protocol, such as which requests and streams are active. This type is used
     for higher-level operations, such as reading frames from a socket, exposing
     and managing a higher-level primitive for representing command responses,
     etc. This class is what peers should probably use to bridge wire activity
     with the higher-level peer API.
     """
 
-    def __init__(self, ui, clientreactor):
+    def __init__(self, ui, clientreactor, opener=None,
+                 requestbuilder=util.urlreq.request):
         self._ui = ui
         self._reactor = clientreactor
         self._requests = {}
         self._futures = {}
         self._responses = {}
+        self._redirects = []
         self._frameseof = False
+        self._opener = opener or urlmod.opener(ui)
+        self._requestbuilder = requestbuilder
 
     def callcommand(self, command, args, f, redirect=None):
         """Register a request to call a command.
 
         Returns an iterable of frames that should be sent over the wire.
         """
         request, action, meta = self._reactor.callcommand(command, args,
                                                           redirect=redirect)
 
         if action != 'noop':
             raise error.ProgrammingError('%s not yet supported' % action)
 
         rid = request.requestid
         self._requests[rid] = request
         self._futures[rid] = f
         # TODO we need some kind of lifetime on response instances otherwise
         # objects() may deadlock.
         self._responses[rid] = commandresponse(rid, command)
 
         return iter(())
 
     def flushcommands(self):
         """Flush all queued commands.
 
         Returns an iterable of frames that should be sent over the wire.
         """
         action, meta = self._reactor.flushcommands()
 
         if action != 'sendframes':
             raise error.ProgrammingError('%s not yet supported' % action)
 
         return meta['framegen']
 
     def readdata(self, framefh):
         """Attempt to read data and do work.
 
         Returns None if no data was read. Presumably this means we're
         done with all read I/O.
         """
         if not self._frameseof:
             frame = wireprotoframing.readframe(framefh)
             if frame is None:
                 # TODO tell reactor?
                 self._frameseof = True
             else:
                 self._ui.note(_('received %r\n') % frame)
                 self._processframe(frame)
 
-        if self._frameseof:
+        # Also try to read the first redirect.
+        if self._redirects:
+            if not self._processredirect(*self._redirects[0]):
+                self._redirects.pop(0)
+
+        if self._frameseof and not self._redirects:
             return None
 
         return True
 
     def _processframe(self, frame):
         """Process a single read frame."""
 
         action, meta = self._reactor.onframerecv(frame)
 
         if action == 'error':
             e = error.RepoError(meta['message'])
 
             if frame.requestid in self._responses:
                 self._responses[frame.requestid]._oninputcomplete()
 
             if frame.requestid in self._futures:
                 self._futures[frame.requestid].set_exception(e)
                 del self._futures[frame.requestid]
             else:
                 raise e
 
             return
 
         if frame.requestid not in self._requests:
             raise error.ProgrammingError(
                 'received frame for unknown request; this is either a bug in '
                 'the clientreactor not screening for this or this instance was '
                 'never told about this request: %r' % frame)
 
         response = self._responses[frame.requestid]
 
         if action == 'responsedata':
             # Any failures processing this frame should bubble up to the
             # future tracking the request.
             try:
                 self._processresponsedata(frame, meta, response)
             except BaseException as e:
                 self._futures[frame.requestid].set_exception(e)
                 del self._futures[frame.requestid]
                 response._oninputcomplete()
         else:
             raise error.ProgrammingError(
                 'unhandled action from clientreactor: %s' % action)
 
     def _processresponsedata(self, frame, meta, response):
         # This can raise. The caller can handle it.
         response._onresponsedata(meta['data'])
 
+        # If we got a content redirect response, we want to fetch it and
+        # expose the data as if we received it inline. But we also want to
+        # keep our internal request accounting in order. Our strategy is to
+        # basically put meaningful response handling on pause until EOS occurs
+        # and the stream accounting is in a good state. At that point, we follow
+        # the redirect and replace the response object with its data.
+
+        redirect = response._redirect
+        handlefuture = False if redirect else True
+
         if meta['eos']:
             response._oninputcomplete()
             del self._requests[frame.requestid]
 
+            if redirect:
+                self._followredirect(frame.requestid, redirect)
+                return
+
+        if not handlefuture:
+            return
+
         # If the command has a decoder, we wait until all input has been
         # received before resolving the future. Otherwise we resolve the
         # future immediately.
         if frame.requestid not in self._futures:
             return
 
         if response.command not in COMMAND_DECODERS:
             self._futures[frame.requestid].set_result(response.objects())
             del self._futures[frame.requestid]
         elif response._inputcomplete:
             decoded = COMMAND_DECODERS[response.command](response.objects())
             self._futures[frame.requestid].set_result(decoded)
             del self._futures[frame.requestid]
 
+    def _followredirect(self, requestid, redirect):
+        """Called to initiate redirect following for a request."""
+        self._ui.note(_('(following redirect to %s)\n') % redirect.url)
+
+        # TODO handle framed responses.
+        if redirect.mediatype != b'application/mercurial-cbor':
+            raise error.Abort(_('cannot handle redirects for the %s media type')
+                              % redirect.mediatype)
+
+        if redirect.fullhashes:
+            self._ui.warn(_('(support for validating hashes on content '
+                            'redirects not supported)\n'))
+
+        if redirect.serverdercerts or redirect.servercadercerts:
+            self._ui.warn(_('(support for pinning server certificates on '
+                            'content redirects not supported)\n'))
+
+        headers = {
+            r'Accept': redirect.mediatype,
+        }
+
+        req = self._requestbuilder(pycompat.strurl(redirect.url), None, headers)
+
+        try:
+            res = self._opener.open(req)
+        except util.urlerr.httperror as e:
+            if e.code == 401:
+                raise error.Abort(_('authorization failed'))
+            raise
+        except util.httplib.HTTPException as e:
+            self._ui.debug('http error requesting %s\n' % req.get_full_url())
+            self._ui.traceback()
+            raise IOError(None, e)
+
+        urlmod.wrapresponse(res)
+
+        # The existing response object is associated with frame data. Rather
+        # than try to normalize its state, just create a new object.
+        oldresponse = self._responses[requestid]
+        self._responses[requestid] = commandresponse(requestid,
+                                                     oldresponse.command,
+                                                     fromredirect=True)
+
+        self._redirects.append((requestid, res))
+
+    def _processredirect(self, rid, res):
+        """Called to continue processing a response from a redirect."""
+        response = self._responses[rid]
+
+        try:
+            data = res.read(32768)
+            response._onresponsedata(data)
+
+            # We're at end of stream.
+            if not data:
+                response._oninputcomplete()
+
+            if rid not in self._futures:
+                return
+
+            if response.command not in COMMAND_DECODERS:
+                self._futures[rid].set_result(response.objects())
+                del self._futures[rid]
+            elif response._inputcomplete:
+                decoded = COMMAND_DECODERS[response.command](response.objects())
+                self._futures[rid].set_result(decoded)
+                del self._futures[rid]
+
+            return bool(data)
+
+        except BaseException as e:
+            self._futures[rid].set_exception(e)
+            del self._futures[rid]
+            response._oninputcomplete()
+            return False
+
 def decodebranchmap(objs):
     # Response should be a single CBOR map of branch name to array of nodes.
     bm = next(objs)
 
     return {encoding.tolocal(k): v for k, v in bm.items()}
 
 def decodeheads(objs):
     # Array of node bytestrings.
     return next(objs)
 
 def decodeknown(objs):
     # Bytestring where each byte is a 0 or 1.
     raw = next(objs)
 
     return [True if c == '1' else False for c in raw]
 
 def decodelistkeys(objs):
     # Map with bytestring keys and values.
     return next(objs)
 
 def decodelookup(objs):
     return next(objs)
 
 def decodepushkey(objs):
     return next(objs)
 
 COMMAND_DECODERS = {
     'branchmap': decodebranchmap,
     'heads': decodeheads,
     'known': decodeknown,
     'listkeys': decodelistkeys,
     'lookup': decodelookup,
     'pushkey': decodepushkey,
 }

tests/test-wireproto-content-redirects.t

@@ -1,1369 +1,1394
   $ . $TESTDIR/wireprotohelpers.sh
 
   $ cat >> $HGRCPATH << EOF
   > [extensions]
   > blackbox =
   > [blackbox]
   > track = simplecache
   > EOF
 
   $ hg init server
   $ enablehttpv2 server
   $ cd server
   $ cat >> .hg/hgrc << EOF
   > [extensions]
   > simplecache = $TESTDIR/wireprotosimplecache.py
   > [simplecache]
   > cacheapi = true
   > EOF
 
   $ echo a0 > a
   $ echo b0 > b
   $ hg -q commit -A -m 'commit 0'
   $ echo a1 > a
   $ hg commit -m 'commit 1'
 
   $ hg --debug debugindex -m
      rev linkrev nodeid                                   p1                                       p2
        0       0 992f4779029a3df8d0666d00bb924f69634e2641 0000000000000000000000000000000000000000 0000000000000000000000000000000000000000
        1       1 a988fb43583e871d1ed5750ee074c6d840bbbfc8 992f4779029a3df8d0666d00bb924f69634e2641 0000000000000000000000000000000000000000
 
   $ hg --config simplecache.redirectsfile=redirects.py serve -p $HGPORT -d --pid-file hg.pid -E error.log
   $ cat hg.pid > $DAEMON_PIDS
 
   $ cat > redirects.py << EOF
   > [
   >   {
   >     b'name': b'target-a',
   >     b'protocol': b'http',
   >     b'snirequired': False,
   >     b'tlsversions': [b'1.2', b'1.3'],
   >     b'uris': [b'http://example.com/'],
   >   },
   > ]
   > EOF
 
 Redirect targets advertised when configured
 
   $ sendhttpv2peerhandshake << EOF
   > command capabilities
   > EOF
   creating http peer for wire protocol version 2
   s>     GET /?cmd=capabilities HTTP/1.1\r\n
   s>     Accept-Encoding: identity\r\n
   s>     vary: X-HgProto-1,X-HgUpgrade-1\r\n
   s>     x-hgproto-1: cbor\r\n
   s>     x-hgupgrade-1: exp-http-v2-0002\r\n
   s>     accept: application/mercurial-0.1\r\n
   s>     host: $LOCALIP:$HGPORT\r\n (glob)
   s>     user-agent: Mercurial debugwireproto\r\n
   s>     \r\n
   s> makefile('rb', None)
   s>     HTTP/1.1 200 OK\r\n
   s>     Server: testing stub value\r\n
   s>     Date: $HTTP_DATE$\r\n
   s>     Content-Type: application/mercurial-cbor\r\n
   s>     Content-Length: 1970\r\n
   s>     \r\n
   s>     \xa3GapibaseDapi/Dapis\xa1Pexp-http-v2-0002\xa6Hcommands\xaaIbranchmap\xa2Dargs\xa0Kpermissions\x81DpullLcapabilities\xa2Dargs\xa0Kpermissions\x81DpullMchangesetdata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x84IbookmarksGparentsEphaseHrevisionInoderange\xa3Gdefault\xf6Hrequired\xf4DtypeDlistEnodes\xa3Gdefault\xf6Hrequired\xf4DtypeDlistJnodesdepth\xa3Gdefault\xf6Hrequired\xf4DtypeCintKpermissions\x81DpullHfiledata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x82GparentsHrevisionKhaveparents\xa3Gdefault\xf4Hrequired\xf4DtypeDboolEnodes\xa2Hrequired\xf5DtypeDlistDpath\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullEheads\xa2Dargs\xa1Jpubliconly\xa3Gdefault\xf4Hrequired\xf4DtypeDboolKpermissions\x81DpullEknown\xa2Dargs\xa1Enodes\xa3Gdefault\x80Hrequired\xf4DtypeDlistKpermissions\x81DpullHlistkeys\xa2Dargs\xa1Inamespace\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullFlookup\xa2Dargs\xa1Ckey\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullLmanifestdata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x82GparentsHrevisionKhaveparents\xa3Gdefault\xf4Hrequired\xf4DtypeDboolEnodes\xa2Hrequired\xf5DtypeDlistDtree\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullGpushkey\xa2Dargs\xa4Ckey\xa2Hrequired\xf5DtypeEbytesInamespace\xa2Hrequired\xf5DtypeEbytesCnew\xa2Hrequired\xf5DtypeEbytesCold\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpushKcompression\x82\xa1DnameDzstd\xa1DnameDzlibQframingmediatypes\x81X&application/mercurial-exp-framing-0005Rpathfilterprefixes\xd9\x01\x02\x82Epath:Lrootfilesin:Nrawrepoformats\x82LgeneraldeltaHrevlogv1Hredirect\xa2Fhashes\x82Fsha256Dsha1Gtargets\x81\xa5DnameHtarget-aHprotocolDhttpKsnirequired\xf4Ktlsversions\x82C1.2C1.3Duris\x81Shttp://example.com/Nv1capabilitiesY\x01\xd8batch branchmap $USUAL_BUNDLE2_CAPS$ changegroupsubset compression=$BUNDLE2_COMPRESSIONS$ getbundle httpheader=1024 httpmediatype=0.1rx,0.1tx,0.2tx known lookup pushkey streamreqs=generaldelta,revlogv1 unbundle=HG10GZ,HG10BZ,HG10UN unbundlehash
   (remote redirect target target-a is compatible)
   sending capabilities command
   s>     POST /api/exp-http-v2-0002/ro/capabilities HTTP/1.1\r\n
   s>     Accept-Encoding: identity\r\n
   s>     accept: application/mercurial-exp-framing-0005\r\n
   s>     content-type: application/mercurial-exp-framing-0005\r\n
   s>     content-length: 75\r\n
   s>     host: $LOCALIP:$HGPORT\r\n (glob)
   s>     user-agent: Mercurial debugwireproto\r\n
   s>     \r\n
   s>     C\x00\x00\x01\x00\x01\x01\x11\xa2DnameLcapabilitiesHredirect\xa2Fhashes\x82Fsha256Dsha1Gtargets\x81Htarget-a
   s> makefile('rb', None)
   s>     HTTP/1.1 200 OK\r\n
   s>     Server: testing stub value\r\n
   s>     Date: $HTTP_DATE$\r\n
   s>     Content-Type: application/mercurial-exp-framing-0005\r\n
   s>     Transfer-Encoding: chunked\r\n
   s>     \r\n
   s>     13\r\n
   s>     \x0b\x00\x00\x01\x00\x02\x011
   s>     \xa1FstatusBok
   s>     \r\n
   received frame(size=11; request=1; stream=2; streamflags=stream-begin; type=command-response; flags=continuation)
   s>     5ab\r\n
   s>     \xa3\x05\x00\x01\x00\x02\x001
   s>     \xa6Hcommands\xaaIbranchmap\xa2Dargs\xa0Kpermissions\x81DpullLcapabilities\xa2Dargs\xa0Kpermissions\x81DpullMchangesetdata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x84IbookmarksGparentsEphaseHrevisionInoderange\xa3Gdefault\xf6Hrequired\xf4DtypeDlistEnodes\xa3Gdefault\xf6Hrequired\xf4DtypeDlistJnodesdepth\xa3Gdefault\xf6Hrequired\xf4DtypeCintKpermissions\x81DpullHfiledata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x82GparentsHrevisionKhaveparents\xa3Gdefault\xf4Hrequired\xf4DtypeDboolEnodes\xa2Hrequired\xf5DtypeDlistDpath\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullEheads\xa2Dargs\xa1Jpubliconly\xa3Gdefault\xf4Hrequired\xf4DtypeDboolKpermissions\x81DpullEknown\xa2Dargs\xa1Enodes\xa3Gdefault\x80Hrequired\xf4DtypeDlistKpermissions\x81DpullHlistkeys\xa2Dargs\xa1Inamespace\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullFlookup\xa2Dargs\xa1Ckey\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullLmanifestdata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x82GparentsHrevisionKhaveparents\xa3Gdefault\xf4Hrequired\xf4DtypeDboolEnodes\xa2Hrequired\xf5DtypeDlistDtree\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullGpushkey\xa2Dargs\xa4Ckey\xa2Hrequired\xf5DtypeEbytesInamespace\xa2Hrequired\xf5DtypeEbytesCnew\xa2Hrequired\xf5DtypeEbytesCold\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpushKcompression\x82\xa1DnameDzstd\xa1DnameDzlibQframingmediatypes\x81X&application/mercurial-exp-framing-0005Rpathfilterprefixes\xd9\x01\x02\x82Epath:Lrootfilesin:Nrawrepoformats\x82LgeneraldeltaHrevlogv1Hredirect\xa2Fhashes\x82Fsha256Dsha1Gtargets\x81\xa5DnameHtarget-aHprotocolDhttpKsnirequired\xf4Ktlsversions\x82C1.2C1.3Duris\x81Shttp://example.com/
   s>     \r\n
   received frame(size=1443; request=1; stream=2; streamflags=; type=command-response; flags=continuation)
   s>     8\r\n
   s>     \x00\x00\x00\x01\x00\x02\x002
   s>     \r\n
   s>     0\r\n
   s>     \r\n
   received frame(size=0; request=1; stream=2; streamflags=; type=command-response; flags=eos)
   response: gen[
     {
       b'commands': {
         b'branchmap': {
           b'args': {},
           b'permissions': [
             b'pull'
           ]
         },
         b'capabilities': {
           b'args': {},
           b'permissions': [
             b'pull'
           ]
         },
         b'changesetdata': {
           b'args': {
             b'fields': {
               b'default': set([]),
               b'required': False,
               b'type': b'set',
               b'validvalues': set([
                 b'bookmarks',
                 b'parents',
                 b'phase',
                 b'revision'
               ])
             },
             b'noderange': {
               b'default': None,
               b'required': False,
               b'type': b'list'
             },
             b'nodes': {
               b'default': None,
               b'required': False,
               b'type': b'list'
             },
             b'nodesdepth': {
               b'default': None,
               b'required': False,
               b'type': b'int'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'filedata': {
           b'args': {
             b'fields': {
               b'default': set([]),
               b'required': False,
               b'type': b'set',
               b'validvalues': set([
                 b'parents',
                 b'revision'
               ])
             },
             b'haveparents': {
               b'default': False,
               b'required': False,
               b'type': b'bool'
             },
             b'nodes': {
               b'required': True,
               b'type': b'list'
             },
             b'path': {
               b'required': True,
               b'type': b'bytes'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'heads': {
           b'args': {
             b'publiconly': {
               b'default': False,
               b'required': False,
               b'type': b'bool'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'known': {
           b'args': {
             b'nodes': {
               b'default': [],
               b'required': False,
               b'type': b'list'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'listkeys': {
           b'args': {
             b'namespace': {
               b'required': True,
               b'type': b'bytes'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'lookup': {
           b'args': {
             b'key': {
               b'required': True,
               b'type': b'bytes'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'manifestdata': {
           b'args': {
             b'fields': {
               b'default': set([]),
               b'required': False,
               b'type': b'set',
               b'validvalues': set([
                 b'parents',
                 b'revision'
               ])
             },
             b'haveparents': {
               b'default': False,
               b'required': False,
               b'type': b'bool'
             },
             b'nodes': {
               b'required': True,
               b'type': b'list'
             },
             b'tree': {
               b'required': True,
               b'type': b'bytes'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'pushkey': {
           b'args': {
             b'key': {
               b'required': True,
               b'type': b'bytes'
             },
             b'namespace': {
               b'required': True,
               b'type': b'bytes'
             },
             b'new': {
               b'required': True,
               b'type': b'bytes'
             },
             b'old': {
               b'required': True,
               b'type': b'bytes'
             }
           },
           b'permissions': [
             b'push'
           ]
         }
       },
       b'compression': [
         {
           b'name': b'zstd'
         },
         {
           b'name': b'zlib'
         }
       ],
       b'framingmediatypes': [
         b'application/mercurial-exp-framing-0005'
       ],
       b'pathfilterprefixes': set([
         b'path:',
         b'rootfilesin:'
       ]),
       b'rawrepoformats': [
         b'generaldelta',
         b'revlogv1'
       ],
       b'redirect': {
         b'hashes': [
           b'sha256',
           b'sha1'
         ],
         b'targets': [
           {
             b'name': b'target-a',
             b'protocol': b'http',
             b'snirequired': False,
             b'tlsversions': [
               b'1.2',
               b'1.3'
             ],
             b'uris': [
               b'http://example.com/'
             ]
           }
         ]
       }
     }
   ]
 
 Unknown protocol is filtered from compatible targets
 
   $ cat > redirects.py << EOF
   > [
   >   {
   >     b'name': b'target-a',
   >     b'protocol': b'http',
   >     b'uris': [b'http://example.com/'],
   >   },
   >   {
   >     b'name': b'target-b',
   >     b'protocol': b'unknown',
   >     b'uris': [b'unknown://example.com/'],
   >   },
   > ]
   > EOF
 
   $ sendhttpv2peerhandshake << EOF
   > command capabilities
   > EOF
   creating http peer for wire protocol version 2
   s>     GET /?cmd=capabilities HTTP/1.1\r\n
   s>     Accept-Encoding: identity\r\n
   s>     vary: X-HgProto-1,X-HgUpgrade-1\r\n
   s>     x-hgproto-1: cbor\r\n
   s>     x-hgupgrade-1: exp-http-v2-0002\r\n
   s>     accept: application/mercurial-0.1\r\n
   s>     host: $LOCALIP:$HGPORT\r\n (glob)
   s>     user-agent: Mercurial debugwireproto\r\n
   s>     \r\n
   s> makefile('rb', None)
   s>     HTTP/1.1 200 OK\r\n
   s>     Server: testing stub value\r\n
   s>     Date: $HTTP_DATE$\r\n
   s>     Content-Type: application/mercurial-cbor\r\n
   s>     Content-Length: 1997\r\n
   s>     \r\n
   s>     \xa3GapibaseDapi/Dapis\xa1Pexp-http-v2-0002\xa6Hcommands\xaaIbranchmap\xa2Dargs\xa0Kpermissions\x81DpullLcapabilities\xa2Dargs\xa0Kpermissions\x81DpullMchangesetdata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x84IbookmarksGparentsEphaseHrevisionInoderange\xa3Gdefault\xf6Hrequired\xf4DtypeDlistEnodes\xa3Gdefault\xf6Hrequired\xf4DtypeDlistJnodesdepth\xa3Gdefault\xf6Hrequired\xf4DtypeCintKpermissions\x81DpullHfiledata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x82GparentsHrevisionKhaveparents\xa3Gdefault\xf4Hrequired\xf4DtypeDboolEnodes\xa2Hrequired\xf5DtypeDlistDpath\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullEheads\xa2Dargs\xa1Jpubliconly\xa3Gdefault\xf4Hrequired\xf4DtypeDboolKpermissions\x81DpullEknown\xa2Dargs\xa1Enodes\xa3Gdefault\x80Hrequired\xf4DtypeDlistKpermissions\x81DpullHlistkeys\xa2Dargs\xa1Inamespace\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullFlookup\xa2Dargs\xa1Ckey\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullLmanifestdata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x82GparentsHrevisionKhaveparents\xa3Gdefault\xf4Hrequired\xf4DtypeDboolEnodes\xa2Hrequired\xf5DtypeDlistDtree\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullGpushkey\xa2Dargs\xa4Ckey\xa2Hrequired\xf5DtypeEbytesInamespace\xa2Hrequired\xf5DtypeEbytesCnew\xa2Hrequired\xf5DtypeEbytesCold\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpushKcompression\x82\xa1DnameDzstd\xa1DnameDzlibQframingmediatypes\x81X&application/mercurial-exp-framing-0005Rpathfilterprefixes\xd9\x01\x02\x82Epath:Lrootfilesin:Nrawrepoformats\x82LgeneraldeltaHrevlogv1Hredirect\xa2Fhashes\x82Fsha256Dsha1Gtargets\x82\xa3DnameHtarget-aHprotocolDhttpDuris\x81Shttp://example.com/\xa3DnameHtarget-bHprotocolGunknownDuris\x81Vunknown://example.com/Nv1capabilitiesY\x01\xd8batch branchmap $USUAL_BUNDLE2_CAPS$ changegroupsubset compression=$BUNDLE2_COMPRESSIONS$ getbundle httpheader=1024 httpmediatype=0.1rx,0.1tx,0.2tx known lookup pushkey streamreqs=generaldelta,revlogv1 unbundle=HG10GZ,HG10BZ,HG10UN unbundlehash
   (remote redirect target target-a is compatible)
   (remote redirect target target-b uses unsupported protocol: unknown)
   sending capabilities command
   s>     POST /api/exp-http-v2-0002/ro/capabilities HTTP/1.1\r\n
   s>     Accept-Encoding: identity\r\n
   s>     accept: application/mercurial-exp-framing-0005\r\n
   s>     content-type: application/mercurial-exp-framing-0005\r\n
   s>     content-length: 75\r\n
   s>     host: $LOCALIP:$HGPORT\r\n (glob)
   s>     user-agent: Mercurial debugwireproto\r\n
   s>     \r\n
   s>     C\x00\x00\x01\x00\x01\x01\x11\xa2DnameLcapabilitiesHredirect\xa2Fhashes\x82Fsha256Dsha1Gtargets\x81Htarget-a
   s> makefile('rb', None)
   s>     HTTP/1.1 200 OK\r\n
   s>     Server: testing stub value\r\n
   s>     Date: $HTTP_DATE$\r\n
   s>     Content-Type: application/mercurial-exp-framing-0005\r\n
   s>     Transfer-Encoding: chunked\r\n
   s>     \r\n
   s>     13\r\n
   s>     \x0b\x00\x00\x01\x00\x02\x011
   s>     \xa1FstatusBok
   s>     \r\n
   received frame(size=11; request=1; stream=2; streamflags=stream-begin; type=command-response; flags=continuation)
   s>     5c6\r\n
   s>     \xbe\x05\x00\x01\x00\x02\x001
   s>     \xa6Hcommands\xaaIbranchmap\xa2Dargs\xa0Kpermissions\x81DpullLcapabilities\xa2Dargs\xa0Kpermissions\x81DpullMchangesetdata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x84IbookmarksGparentsEphaseHrevisionInoderange\xa3Gdefault\xf6Hrequired\xf4DtypeDlistEnodes\xa3Gdefault\xf6Hrequired\xf4DtypeDlistJnodesdepth\xa3Gdefault\xf6Hrequired\xf4DtypeCintKpermissions\x81DpullHfiledata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x82GparentsHrevisionKhaveparents\xa3Gdefault\xf4Hrequired\xf4DtypeDboolEnodes\xa2Hrequired\xf5DtypeDlistDpath\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullEheads\xa2Dargs\xa1Jpubliconly\xa3Gdefault\xf4Hrequired\xf4DtypeDboolKpermissions\x81DpullEknown\xa2Dargs\xa1Enodes\xa3Gdefault\x80Hrequired\xf4DtypeDlistKpermissions\x81DpullHlistkeys\xa2Dargs\xa1Inamespace\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullFlookup\xa2Dargs\xa1Ckey\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullLmanifestdata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x82GparentsHrevisionKhaveparents\xa3Gdefault\xf4Hrequired\xf4DtypeDboolEnodes\xa2Hrequired\xf5DtypeDlistDtree\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullGpushkey\xa2Dargs\xa4Ckey\xa2Hrequired\xf5DtypeEbytesInamespace\xa2Hrequired\xf5DtypeEbytesCnew\xa2Hrequired\xf5DtypeEbytesCold\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpushKcompression\x82\xa1DnameDzstd\xa1DnameDzlibQframingmediatypes\x81X&application/mercurial-exp-framing-0005Rpathfilterprefixes\xd9\x01\x02\x82Epath:Lrootfilesin:Nrawrepoformats\x82LgeneraldeltaHrevlogv1Hredirect\xa2Fhashes\x82Fsha256Dsha1Gtargets\x82\xa3DnameHtarget-aHprotocolDhttpDuris\x81Shttp://example.com/\xa3DnameHtarget-bHprotocolGunknownDuris\x81Vunknown://example.com/
   s>     \r\n
   received frame(size=1470; request=1; stream=2; streamflags=; type=command-response; flags=continuation)
   s>     8\r\n
   s>     \x00\x00\x00\x01\x00\x02\x002
   s>     \r\n
   s>     0\r\n
   s>     \r\n
   received frame(size=0; request=1; stream=2; streamflags=; type=command-response; flags=eos)
   response: gen[
     {
       b'commands': {
         b'branchmap': {
           b'args': {},
           b'permissions': [
             b'pull'
           ]
         },
         b'capabilities': {
           b'args': {},
           b'permissions': [
             b'pull'
           ]
         },
         b'changesetdata': {
           b'args': {
             b'fields': {
               b'default': set([]),
               b'required': False,
               b'type': b'set',
               b'validvalues': set([
                 b'bookmarks',
                 b'parents',
                 b'phase',
                 b'revision'
               ])
             },
             b'noderange': {
               b'default': None,
               b'required': False,
               b'type': b'list'
             },
             b'nodes': {
               b'default': None,
               b'required': False,
               b'type': b'list'
             },
             b'nodesdepth': {
               b'default': None,
               b'required': False,
               b'type': b'int'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'filedata': {
           b'args': {
             b'fields': {
               b'default': set([]),
               b'required': False,
               b'type': b'set',
               b'validvalues': set([
                 b'parents',
                 b'revision'
               ])
             },
             b'haveparents': {
               b'default': False,
               b'required': False,
               b'type': b'bool'
             },
             b'nodes': {
               b'required': True,
               b'type': b'list'
             },
             b'path': {
               b'required': True,
               b'type': b'bytes'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'heads': {
           b'args': {
             b'publiconly': {
               b'default': False,
               b'required': False,
               b'type': b'bool'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'known': {
           b'args': {
             b'nodes': {
               b'default': [],
               b'required': False,
               b'type': b'list'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'listkeys': {
           b'args': {
             b'namespace': {
               b'required': True,
               b'type': b'bytes'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'lookup': {
           b'args': {
             b'key': {
               b'required': True,
               b'type': b'bytes'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'manifestdata': {
           b'args': {
             b'fields': {
               b'default': set([]),
               b'required': False,
               b'type': b'set',
               b'validvalues': set([
                 b'parents',
                 b'revision'
               ])
             },
             b'haveparents': {
               b'default': False,
               b'required': False,
               b'type': b'bool'
             },
             b'nodes': {
               b'required': True,
               b'type': b'list'
             },
             b'tree': {
               b'required': True,
               b'type': b'bytes'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'pushkey': {
           b'args': {
             b'key': {
               b'required': True,
               b'type': b'bytes'
             },
             b'namespace': {
               b'required': True,
               b'type': b'bytes'
             },
             b'new': {
               b'required': True,
               b'type': b'bytes'
             },
             b'old': {
               b'required': True,
               b'type': b'bytes'
             }
           },
           b'permissions': [
             b'push'
           ]
         }
       },
       b'compression': [
         {
           b'name': b'zstd'
         },
         {
           b'name': b'zlib'
         }
       ],
       b'framingmediatypes': [
         b'application/mercurial-exp-framing-0005'
       ],
       b'pathfilterprefixes': set([
         b'path:',
         b'rootfilesin:'
       ]),
       b'rawrepoformats': [
         b'generaldelta',
         b'revlogv1'
       ],
       b'redirect': {
         b'hashes': [
           b'sha256',
           b'sha1'
         ],
         b'targets': [
           {
             b'name': b'target-a',
             b'protocol': b'http',
             b'uris': [
               b'http://example.com/'
             ]
           },
           {
             b'name': b'target-b',
             b'protocol': b'unknown',
             b'uris': [
               b'unknown://example.com/'
             ]
           }
         ]
       }
     }
   ]
 
 Missing SNI support filters targets that require SNI
 
   $ cat > nosni.py << EOF
   > from mercurial import sslutil
   > sslutil.hassni = False
   > EOF
   $ cat >> $HGRCPATH << EOF
   > [extensions]
   > nosni=`pwd`/nosni.py
   > EOF
 
   $ cat > redirects.py << EOF
   > [
   >   {
   >     b'name': b'target-bad-tls',
   >     b'protocol': b'https',
   >     b'uris': [b'https://example.com/'],
   >     b'snirequired': True,
   >   },
   > ]
   > EOF
 
   $ sendhttpv2peerhandshake << EOF
   > command capabilities
   > EOF
   creating http peer for wire protocol version 2
   s>     GET /?cmd=capabilities HTTP/1.1\r\n
   s>     Accept-Encoding: identity\r\n
   s>     vary: X-HgProto-1,X-HgUpgrade-1\r\n
   s>     x-hgproto-1: cbor\r\n
   s>     x-hgupgrade-1: exp-http-v2-0002\r\n
   s>     accept: application/mercurial-0.1\r\n
   s>     host: $LOCALIP:$HGPORT\r\n (glob)
   s>     user-agent: Mercurial debugwireproto\r\n
   s>     \r\n
   s> makefile('rb', None)
   s>     HTTP/1.1 200 OK\r\n
   s>     Server: testing stub value\r\n
   s>     Date: $HTTP_DATE$\r\n
   s>     Content-Type: application/mercurial-cbor\r\n
   s>     Content-Length: 1957\r\n
   s>     \r\n
   s>     \xa3GapibaseDapi/Dapis\xa1Pexp-http-v2-0002\xa6Hcommands\xaaIbranchmap\xa2Dargs\xa0Kpermissions\x81DpullLcapabilities\xa2Dargs\xa0Kpermissions\x81DpullMchangesetdata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x84IbookmarksGparentsEphaseHrevisionInoderange\xa3Gdefault\xf6Hrequired\xf4DtypeDlistEnodes\xa3Gdefault\xf6Hrequired\xf4DtypeDlistJnodesdepth\xa3Gdefault\xf6Hrequired\xf4DtypeCintKpermissions\x81DpullHfiledata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x82GparentsHrevisionKhaveparents\xa3Gdefault\xf4Hrequired\xf4DtypeDboolEnodes\xa2Hrequired\xf5DtypeDlistDpath\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullEheads\xa2Dargs\xa1Jpubliconly\xa3Gdefault\xf4Hrequired\xf4DtypeDboolKpermissions\x81DpullEknown\xa2Dargs\xa1Enodes\xa3Gdefault\x80Hrequired\xf4DtypeDlistKpermissions\x81DpullHlistkeys\xa2Dargs\xa1Inamespace\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullFlookup\xa2Dargs\xa1Ckey\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullLmanifestdata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x82GparentsHrevisionKhaveparents\xa3Gdefault\xf4Hrequired\xf4DtypeDboolEnodes\xa2Hrequired\xf5DtypeDlistDtree\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullGpushkey\xa2Dargs\xa4Ckey\xa2Hrequired\xf5DtypeEbytesInamespace\xa2Hrequired\xf5DtypeEbytesCnew\xa2Hrequired\xf5DtypeEbytesCold\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpushKcompression\x82\xa1DnameDzstd\xa1DnameDzlibQframingmediatypes\x81X&application/mercurial-exp-framing-0005Rpathfilterprefixes\xd9\x01\x02\x82Epath:Lrootfilesin:Nrawrepoformats\x82LgeneraldeltaHrevlogv1Hredirect\xa2Fhashes\x82Fsha256Dsha1Gtargets\x81\xa4DnameNtarget-bad-tlsHprotocolEhttpsKsnirequired\xf5Duris\x81Thttps://example.com/Nv1capabilitiesY\x01\xd8batch branchmap $USUAL_BUNDLE2_CAPS$ changegroupsubset compression=$BUNDLE2_COMPRESSIONS$ getbundle httpheader=1024 httpmediatype=0.1rx,0.1tx,0.2tx known lookup pushkey streamreqs=generaldelta,revlogv1 unbundle=HG10GZ,HG10BZ,HG10UN unbundlehash
   (redirect target target-bad-tls requires SNI, which is unsupported)
   sending capabilities command
   s>     POST /api/exp-http-v2-0002/ro/capabilities HTTP/1.1\r\n
   s>     Accept-Encoding: identity\r\n
   s>     accept: application/mercurial-exp-framing-0005\r\n
   s>     content-type: application/mercurial-exp-framing-0005\r\n
   s>     content-length: 66\r\n
   s>     host: $LOCALIP:$HGPORT\r\n (glob)
   s>     user-agent: Mercurial debugwireproto\r\n
   s>     \r\n
   s>     :\x00\x00\x01\x00\x01\x01\x11\xa2DnameLcapabilitiesHredirect\xa2Fhashes\x82Fsha256Dsha1Gtargets\x80
   s> makefile('rb', None)
   s>     HTTP/1.1 200 OK\r\n
   s>     Server: testing stub value\r\n
   s>     Date: $HTTP_DATE$\r\n
   s>     Content-Type: application/mercurial-exp-framing-0005\r\n
   s>     Transfer-Encoding: chunked\r\n
   s>     \r\n
   s>     13\r\n
   s>     \x0b\x00\x00\x01\x00\x02\x011
   s>     \xa1FstatusBok
   s>     \r\n
   received frame(size=11; request=1; stream=2; streamflags=stream-begin; type=command-response; flags=continuation)
   s>     59e\r\n
   s>     \x96\x05\x00\x01\x00\x02\x001
   s>     \xa6Hcommands\xaaIbranchmap\xa2Dargs\xa0Kpermissions\x81DpullLcapabilities\xa2Dargs\xa0Kpermissions\x81DpullMchangesetdata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x84IbookmarksGparentsEphaseHrevisionInoderange\xa3Gdefault\xf6Hrequired\xf4DtypeDlistEnodes\xa3Gdefault\xf6Hrequired\xf4DtypeDlistJnodesdepth\xa3Gdefault\xf6Hrequired\xf4DtypeCintKpermissions\x81DpullHfiledata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x82GparentsHrevisionKhaveparents\xa3Gdefault\xf4Hrequired\xf4DtypeDboolEnodes\xa2Hrequired\xf5DtypeDlistDpath\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullEheads\xa2Dargs\xa1Jpubliconly\xa3Gdefault\xf4Hrequired\xf4DtypeDboolKpermissions\x81DpullEknown\xa2Dargs\xa1Enodes\xa3Gdefault\x80Hrequired\xf4DtypeDlistKpermissions\x81DpullHlistkeys\xa2Dargs\xa1Inamespace\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullFlookup\xa2Dargs\xa1Ckey\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullLmanifestdata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x82GparentsHrevisionKhaveparents\xa3Gdefault\xf4Hrequired\xf4DtypeDboolEnodes\xa2Hrequired\xf5DtypeDlistDtree\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullGpushkey\xa2Dargs\xa4Ckey\xa2Hrequired\xf5DtypeEbytesInamespace\xa2Hrequired\xf5DtypeEbytesCnew\xa2Hrequired\xf5DtypeEbytesCold\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpushKcompression\x82\xa1DnameDzstd\xa1DnameDzlibQframingmediatypes\x81X&application/mercurial-exp-framing-0005Rpathfilterprefixes\xd9\x01\x02\x82Epath:Lrootfilesin:Nrawrepoformats\x82LgeneraldeltaHrevlogv1Hredirect\xa2Fhashes\x82Fsha256Dsha1Gtargets\x81\xa4DnameNtarget-bad-tlsHprotocolEhttpsKsnirequired\xf5Duris\x81Thttps://example.com/
   s>     \r\n
   received frame(size=1430; request=1; stream=2; streamflags=; type=command-response; flags=continuation)
   s>     8\r\n
   s>     \x00\x00\x00\x01\x00\x02\x002
   s>     \r\n
   s>     0\r\n
   s>     \r\n
   received frame(size=0; request=1; stream=2; streamflags=; type=command-response; flags=eos)
   response: gen[
     {
       b'commands': {
         b'branchmap': {
           b'args': {},
           b'permissions': [
             b'pull'
           ]
         },
         b'capabilities': {
           b'args': {},
           b'permissions': [
             b'pull'
           ]
         },
         b'changesetdata': {
           b'args': {
             b'fields': {
               b'default': set([]),
               b'required': False,
               b'type': b'set',
               b'validvalues': set([
                 b'bookmarks',
                 b'parents',
                 b'phase',
                 b'revision'
               ])
             },
             b'noderange': {
               b'default': None,
               b'required': False,
               b'type': b'list'
             },
             b'nodes': {
               b'default': None,
               b'required': False,
               b'type': b'list'
             },
             b'nodesdepth': {
               b'default': None,
               b'required': False,
               b'type': b'int'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'filedata': {
           b'args': {
             b'fields': {
               b'default': set([]),
               b'required': False,
               b'type': b'set',
               b'validvalues': set([
                 b'parents',
                 b'revision'
               ])
             },
             b'haveparents': {
               b'default': False,
               b'required': False,
               b'type': b'bool'
             },
             b'nodes': {
               b'required': True,
               b'type': b'list'
             },
             b'path': {
               b'required': True,
               b'type': b'bytes'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'heads': {
           b'args': {
             b'publiconly': {
               b'default': False,
               b'required': False,
               b'type': b'bool'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'known': {
           b'args': {
             b'nodes': {
               b'default': [],
               b'required': False,
               b'type': b'list'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'listkeys': {
           b'args': {
             b'namespace': {
               b'required': True,
               b'type': b'bytes'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'lookup': {
           b'args': {
             b'key': {
               b'required': True,
               b'type': b'bytes'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'manifestdata': {
           b'args': {
             b'fields': {
               b'default': set([]),
               b'required': False,
               b'type': b'set',
               b'validvalues': set([
                 b'parents',
                 b'revision'
               ])
             },
             b'haveparents': {
               b'default': False,
               b'required': False,
               b'type': b'bool'
             },
             b'nodes': {
               b'required': True,
               b'type': b'list'
             },
             b'tree': {
               b'required': True,
               b'type': b'bytes'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'pushkey': {
           b'args': {
             b'key': {
               b'required': True,
               b'type': b'bytes'
             },
             b'namespace': {
               b'required': True,
               b'type': b'bytes'
             },
             b'new': {
               b'required': True,
               b'type': b'bytes'
             },
             b'old': {
               b'required': True,
               b'type': b'bytes'
             }
           },
           b'permissions': [
             b'push'
           ]
         }
       },
       b'compression': [
         {
           b'name': b'zstd'
         },
         {
           b'name': b'zlib'
         }
       ],
       b'framingmediatypes': [
         b'application/mercurial-exp-framing-0005'
       ],
       b'pathfilterprefixes': set([
         b'path:',
         b'rootfilesin:'
       ]),
       b'rawrepoformats': [
         b'generaldelta',
         b'revlogv1'
       ],
       b'redirect': {
         b'hashes': [
           b'sha256',
           b'sha1'
         ],
         b'targets': [
           {
             b'name': b'target-bad-tls',
             b'protocol': b'https',
             b'snirequired': True,
             b'uris': [
               b'https://example.com/'
             ]
           }
         ]
       }
     }
   ]
 
   $ cat >> $HGRCPATH << EOF
   > [extensions]
   > nosni=!
   > EOF
 
 Unknown tls value is filtered from compatible targets
 
   $ cat > redirects.py << EOF
   > [
   >   {
   >     b'name': b'target-bad-tls',
   >     b'protocol': b'https',
   >     b'uris': [b'https://example.com/'],
   >     b'tlsversions': [b'42', b'39'],
   >   },
   > ]
   > EOF
 
   $ sendhttpv2peerhandshake << EOF
   > command capabilities
   > EOF
   creating http peer for wire protocol version 2
   s>     GET /?cmd=capabilities HTTP/1.1\r\n
   s>     Accept-Encoding: identity\r\n
   s>     vary: X-HgProto-1,X-HgUpgrade-1\r\n
   s>     x-hgproto-1: cbor\r\n
   s>     x-hgupgrade-1: exp-http-v2-0002\r\n
   s>     accept: application/mercurial-0.1\r\n
   s>     host: $LOCALIP:$HGPORT\r\n (glob)
   s>     user-agent: Mercurial debugwireproto\r\n
   s>     \r\n
   s> makefile('rb', None)
   s>     HTTP/1.1 200 OK\r\n
   s>     Server: testing stub value\r\n
   s>     Date: $HTTP_DATE$\r\n
   s>     Content-Type: application/mercurial-cbor\r\n
   s>     Content-Length: 1963\r\n
   s>     \r\n
   s>     \xa3GapibaseDapi/Dapis\xa1Pexp-http-v2-0002\xa6Hcommands\xaaIbranchmap\xa2Dargs\xa0Kpermissions\x81DpullLcapabilities\xa2Dargs\xa0Kpermissions\x81DpullMchangesetdata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x84IbookmarksGparentsEphaseHrevisionInoderange\xa3Gdefault\xf6Hrequired\xf4DtypeDlistEnodes\xa3Gdefault\xf6Hrequired\xf4DtypeDlistJnodesdepth\xa3Gdefault\xf6Hrequired\xf4DtypeCintKpermissions\x81DpullHfiledata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x82GparentsHrevisionKhaveparents\xa3Gdefault\xf4Hrequired\xf4DtypeDboolEnodes\xa2Hrequired\xf5DtypeDlistDpath\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullEheads\xa2Dargs\xa1Jpubliconly\xa3Gdefault\xf4Hrequired\xf4DtypeDboolKpermissions\x81DpullEknown\xa2Dargs\xa1Enodes\xa3Gdefault\x80Hrequired\xf4DtypeDlistKpermissions\x81DpullHlistkeys\xa2Dargs\xa1Inamespace\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullFlookup\xa2Dargs\xa1Ckey\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullLmanifestdata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x82GparentsHrevisionKhaveparents\xa3Gdefault\xf4Hrequired\xf4DtypeDboolEnodes\xa2Hrequired\xf5DtypeDlistDtree\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullGpushkey\xa2Dargs\xa4Ckey\xa2Hrequired\xf5DtypeEbytesInamespace\xa2Hrequired\xf5DtypeEbytesCnew\xa2Hrequired\xf5DtypeEbytesCold\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpushKcompression\x82\xa1DnameDzstd\xa1DnameDzlibQframingmediatypes\x81X&application/mercurial-exp-framing-0005Rpathfilterprefixes\xd9\x01\x02\x82Epath:Lrootfilesin:Nrawrepoformats\x82LgeneraldeltaHrevlogv1Hredirect\xa2Fhashes\x82Fsha256Dsha1Gtargets\x81\xa4DnameNtarget-bad-tlsHprotocolEhttpsKtlsversions\x82B42B39Duris\x81Thttps://example.com/Nv1capabilitiesY\x01\xd8batch branchmap $USUAL_BUNDLE2_CAPS$ changegroupsubset compression=$BUNDLE2_COMPRESSIONS$ getbundle httpheader=1024 httpmediatype=0.1rx,0.1tx,0.2tx known lookup pushkey streamreqs=generaldelta,revlogv1 unbundle=HG10GZ,HG10BZ,HG10UN unbundlehash
   (remote redirect target target-bad-tls requires unsupported TLS versions: 39, 42)
   sending capabilities command
   s>     POST /api/exp-http-v2-0002/ro/capabilities HTTP/1.1\r\n
   s>     Accept-Encoding: identity\r\n
   s>     accept: application/mercurial-exp-framing-0005\r\n
   s>     content-type: application/mercurial-exp-framing-0005\r\n
   s>     content-length: 66\r\n
   s>     host: $LOCALIP:$HGPORT\r\n (glob)
   s>     user-agent: Mercurial debugwireproto\r\n
   s>     \r\n
   s>     :\x00\x00\x01\x00\x01\x01\x11\xa2DnameLcapabilitiesHredirect\xa2Fhashes\x82Fsha256Dsha1Gtargets\x80
   s> makefile('rb', None)
   s>     HTTP/1.1 200 OK\r\n
   s>     Server: testing stub value\r\n
   s>     Date: $HTTP_DATE$\r\n
   s>     Content-Type: application/mercurial-exp-framing-0005\r\n
   s>     Transfer-Encoding: chunked\r\n
   s>     \r\n
   s>     13\r\n
   s>     \x0b\x00\x00\x01\x00\x02\x011
   s>     \xa1FstatusBok
   s>     \r\n
   received frame(size=11; request=1; stream=2; streamflags=stream-begin; type=command-response; flags=continuation)
   s>     5a4\r\n
   s>     \x9c\x05\x00\x01\x00\x02\x001
   s>     \xa6Hcommands\xaaIbranchmap\xa2Dargs\xa0Kpermissions\x81DpullLcapabilities\xa2Dargs\xa0Kpermissions\x81DpullMchangesetdata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x84IbookmarksGparentsEphaseHrevisionInoderange\xa3Gdefault\xf6Hrequired\xf4DtypeDlistEnodes\xa3Gdefault\xf6Hrequired\xf4DtypeDlistJnodesdepth\xa3Gdefault\xf6Hrequired\xf4DtypeCintKpermissions\x81DpullHfiledata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x82GparentsHrevisionKhaveparents\xa3Gdefault\xf4Hrequired\xf4DtypeDboolEnodes\xa2Hrequired\xf5DtypeDlistDpath\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullEheads\xa2Dargs\xa1Jpubliconly\xa3Gdefault\xf4Hrequired\xf4DtypeDboolKpermissions\x81DpullEknown\xa2Dargs\xa1Enodes\xa3Gdefault\x80Hrequired\xf4DtypeDlistKpermissions\x81DpullHlistkeys\xa2Dargs\xa1Inamespace\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullFlookup\xa2Dargs\xa1Ckey\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullLmanifestdata\xa2Dargs\xa4Ffields\xa4Gdefault\xd9\x01\x02\x80Hrequired\xf4DtypeCsetKvalidvalues\xd9\x01\x02\x82GparentsHrevisionKhaveparents\xa3Gdefault\xf4Hrequired\xf4DtypeDboolEnodes\xa2Hrequired\xf5DtypeDlistDtree\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpullGpushkey\xa2Dargs\xa4Ckey\xa2Hrequired\xf5DtypeEbytesInamespace\xa2Hrequired\xf5DtypeEbytesCnew\xa2Hrequired\xf5DtypeEbytesCold\xa2Hrequired\xf5DtypeEbytesKpermissions\x81DpushKcompression\x82\xa1DnameDzstd\xa1DnameDzlibQframingmediatypes\x81X&application/mercurial-exp-framing-0005Rpathfilterprefixes\xd9\x01\x02\x82Epath:Lrootfilesin:Nrawrepoformats\x82LgeneraldeltaHrevlogv1Hredirect\xa2Fhashes\x82Fsha256Dsha1Gtargets\x81\xa4DnameNtarget-bad-tlsHprotocolEhttpsKtlsversions\x82B42B39Duris\x81Thttps://example.com/
   s>     \r\n
   received frame(size=1436; request=1; stream=2; streamflags=; type=command-response; flags=continuation)
   s>     8\r\n
   s>     \x00\x00\x00\x01\x00\x02\x002
   s>     \r\n
   s>     0\r\n
   s>     \r\n
   received frame(size=0; request=1; stream=2; streamflags=; type=command-response; flags=eos)
   response: gen[
     {
       b'commands': {
         b'branchmap': {
           b'args': {},
           b'permissions': [
             b'pull'
           ]
         },
         b'capabilities': {
           b'args': {},
           b'permissions': [
             b'pull'
           ]
         },
         b'changesetdata': {
           b'args': {
             b'fields': {
               b'default': set([]),
               b'required': False,
               b'type': b'set',
               b'validvalues': set([
                 b'bookmarks',
                 b'parents',
                 b'phase',
                 b'revision'
               ])
             },
             b'noderange': {
               b'default': None,
               b'required': False,
               b'type': b'list'
             },
             b'nodes': {
               b'default': None,
               b'required': False,
               b'type': b'list'
             },
             b'nodesdepth': {
               b'default': None,
               b'required': False,
               b'type': b'int'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'filedata': {
           b'args': {
             b'fields': {
               b'default': set([]),
               b'required': False,
               b'type': b'set',
               b'validvalues': set([
                 b'parents',
                 b'revision'
               ])
             },
             b'haveparents': {
               b'default': False,
               b'required': False,
               b'type': b'bool'
             },
             b'nodes': {
               b'required': True,
               b'type': b'list'
             },
             b'path': {
               b'required': True,
               b'type': b'bytes'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'heads': {
           b'args': {
             b'publiconly': {
               b'default': False,
               b'required': False,
               b'type': b'bool'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'known': {
           b'args': {
             b'nodes': {
               b'default': [],
               b'required': False,
               b'type': b'list'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'listkeys': {
           b'args': {
             b'namespace': {
               b'required': True,
               b'type': b'bytes'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'lookup': {
           b'args': {
             b'key': {
               b'required': True,
               b'type': b'bytes'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'manifestdata': {
           b'args': {
             b'fields': {
               b'default': set([]),
               b'required': False,
               b'type': b'set',
               b'validvalues': set([
                 b'parents',
                 b'revision'
               ])
             },
             b'haveparents': {
               b'default': False,
               b'required': False,
               b'type': b'bool'
             },
             b'nodes': {
               b'required': True,
               b'type': b'list'
             },
             b'tree': {
               b'required': True,
               b'type': b'bytes'
             }
           },
           b'permissions': [
             b'pull'
           ]
         },
         b'pushkey': {
           b'args': {
             b'key': {
               b'required': True,
               b'type': b'bytes'
             },
             b'namespace': {
               b'required': True,
               b'type': b'bytes'
             },
             b'new': {
               b'required': True,
               b'type': b'bytes'
             },
             b'old': {
               b'required': True,
               b'type': b'bytes'
             }
           },
           b'permissions': [
             b'push'
           ]
         }
       },
       b'compression': [
         {
           b'name': b'zstd'
         },
         {
           b'name': b'zlib'
         }
       ],
       b'framingmediatypes': [
         b'application/mercurial-exp-framing-0005'
       ],
       b'pathfilterprefixes': set([
         b'path:',
         b'rootfilesin:'
       ]),
       b'rawrepoformats': [
         b'generaldelta',
         b'revlogv1'
       ],
       b'redirect': {
         b'hashes': [
           b'sha256',
           b'sha1'
         ],
         b'targets': [
           {
             b'name': b'target-bad-tls',
             b'protocol': b'https',
             b'tlsversions': [
               b'42',
               b'39'
             ],
             b'uris': [
               b'https://example.com/'
             ]
           }
         ]
       }
     }
   ]
 
 Set up the server to issue content redirects to its built-in API server.
 
   $ cat > redirects.py << EOF
   > [
   >   {
   >     b'name': b'local',
   >     b'protocol': b'http',
   >     b'uris': [b'http://example.com/'],
   >   },
   > ]
   > EOF
 
 Request to eventual cache URL should return 404 (validating the cache server works)
 
   $ sendhttpraw << EOF
   > httprequest GET api/simplecache/missingkey
   >     user-agent: test
   > EOF
   using raw connection to peer
   s>     GET /api/simplecache/missingkey HTTP/1.1\r\n
   s>     Accept-Encoding: identity\r\n
   s>     user-agent: test\r\n
   s>     host: $LOCALIP:$HGPORT\r\n (glob)
   s>     \r\n
   s> makefile('rb', None)
   s>     HTTP/1.1 404 Not Found\r\n
   s>     Server: testing stub value\r\n
   s>     Date: $HTTP_DATE$\r\n
   s>     Content-Type: text/plain\r\n
   s>     Content-Length: 22\r\n
   s>     \r\n
   s>     key not found in cache
 
 Send a cacheable request
 
   $ sendhttpv2peer << EOF
   > command manifestdata
   >     nodes eval:[b'\x99\x2f\x47\x79\x02\x9a\x3d\xf8\xd0\x66\x6d\x00\xbb\x92\x4f\x69\x63\x4e\x26\x41']
   >     tree eval:b''
   >     fields eval:[b'parents']
   > EOF
   creating http peer for wire protocol version 2
   sending manifestdata command
   s>     POST /api/exp-http-v2-0002/ro/manifestdata HTTP/1.1\r\n
   s>     Accept-Encoding: identity\r\n
   s>     accept: application/mercurial-exp-framing-0005\r\n
   s>     content-type: application/mercurial-exp-framing-0005\r\n
   s>     content-length: 128\r\n
   s>     host: $LOCALIP:$HGPORT\r\n (glob)
   s>     user-agent: Mercurial debugwireproto\r\n
   s>     \r\n
   s>     x\x00\x00\x01\x00\x01\x01\x11\xa3Dargs\xa3Ffields\x81GparentsEnodes\x81T\x99/Gy\x02\x9a=\xf8\xd0fm\x00\xbb\x92OicN&ADtree@DnameLmanifestdataHredirect\xa2Fhashes\x82Fsha256Dsha1Gtargets\x81Elocal
   s> makefile('rb', None)
   s>     HTTP/1.1 200 OK\r\n
   s>     Server: testing stub value\r\n
   s>     Date: $HTTP_DATE$\r\n
   s>     Content-Type: application/mercurial-exp-framing-0005\r\n
   s>     Transfer-Encoding: chunked\r\n
   s>     \r\n
   s>     13\r\n
   s>     \x0b\x00\x00\x01\x00\x02\x011
   s>     \xa1FstatusBok
   s>     \r\n
   received frame(size=11; request=1; stream=2; streamflags=stream-begin; type=command-response; flags=continuation)
   s>     63\r\n
   s>     [\x00\x00\x01\x00\x02\x001
   s>     \xa1Jtotalitems\x01\xa2DnodeT\x99/Gy\x02\x9a=\xf8\xd0fm\x00\xbb\x92OicN&AGparents\x82T\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00T\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00
   s>     \r\n
   received frame(size=91; request=1; stream=2; streamflags=; type=command-response; flags=continuation)
   s>     8\r\n
   s>     \x00\x00\x00\x01\x00\x02\x002
   s>     \r\n
   s>     0\r\n
   s>     \r\n
   received frame(size=0; request=1; stream=2; streamflags=; type=command-response; flags=eos)
   response: gen[
     {
       b'totalitems': 1
     },
     {
       b'node': b'\x99/Gy\x02\x9a=\xf8\xd0fm\x00\xbb\x92OicN&A',
       b'parents': [
         b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00',
         b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
       ]
     }
   ]
 
 Cached entry should be available on server
 
   $ sendhttpraw << EOF
   > httprequest GET api/simplecache/c045a581599d58608efd3d93d8129841f2af04a0
   >     user-agent: test
   > EOF
   using raw connection to peer
   s>     GET /api/simplecache/c045a581599d58608efd3d93d8129841f2af04a0 HTTP/1.1\r\n
   s>     Accept-Encoding: identity\r\n
   s>     user-agent: test\r\n
   s>     host: $LOCALIP:$HGPORT\r\n (glob)
   s>     \r\n
   s> makefile('rb', None)
   s>     HTTP/1.1 200 OK\r\n
   s>     Server: testing stub value\r\n
   s>     Date: $HTTP_DATE$\r\n
   s>     Content-Type: application/mercurial-cbor\r\n
   s>     Content-Length: 91\r\n
   s>     \r\n
   s>     \xa1Jtotalitems\x01\xa2DnodeT\x99/Gy\x02\x9a=\xf8\xd0fm\x00\xbb\x92OicN&AGparents\x82T\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00T\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00
   cbor> [
     {
       b'totalitems': 1
     },
     {
       b'node': b'\x99/Gy\x02\x9a=\xf8\xd0fm\x00\xbb\x92OicN&A',
       b'parents': [
         b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00',
         b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
       ]
     }
   ]
 
 2nd request should result in content redirect response
 
   $ sendhttpv2peer << EOF
   > command manifestdata
   >     nodes eval:[b'\x99\x2f\x47\x79\x02\x9a\x3d\xf8\xd0\x66\x6d\x00\xbb\x92\x4f\x69\x63\x4e\x26\x41']
   >     tree eval:b''
   >     fields eval:[b'parents']
   > EOF
   creating http peer for wire protocol version 2
   sending manifestdata command
   s>     POST /api/exp-http-v2-0002/ro/manifestdata HTTP/1.1\r\n
   s>     Accept-Encoding: identity\r\n
   s>     accept: application/mercurial-exp-framing-0005\r\n
   s>     content-type: application/mercurial-exp-framing-0005\r\n
   s>     content-length: 128\r\n
   s>     host: $LOCALIP:$HGPORT\r\n (glob)
   s>     user-agent: Mercurial debugwireproto\r\n
   s>     \r\n
   s>     x\x00\x00\x01\x00\x01\x01\x11\xa3Dargs\xa3Ffields\x81GparentsEnodes\x81T\x99/Gy\x02\x9a=\xf8\xd0fm\x00\xbb\x92OicN&ADtree@DnameLmanifestdataHredirect\xa2Fhashes\x82Fsha256Dsha1Gtargets\x81Elocal
   s> makefile('rb', None)
   s>     HTTP/1.1 200 OK\r\n
   s>     Server: testing stub value\r\n
   s>     Date: $HTTP_DATE$\r\n
   s>     Content-Type: application/mercurial-exp-framing-0005\r\n
   s>     Transfer-Encoding: chunked\r\n
   s>     \r\n
   s>     *\r\n (glob)
   s>     \x*\x00\x00\x01\x00\x02\x011 (glob)
   s>     \xa2Hlocation\xa2ImediatypeX\x1aapplication/mercurial-cborCurl*http://*:$HGPORT/api/simplecache/c045a581599d58608efd3d93d8129841f2af04a0FstatusHredirect (glob)
   s>     \r\n
   received frame(size=*; request=1; stream=2; streamflags=stream-begin; type=command-response; flags=continuation) (glob)
   s>     8\r\n
   s>     \x00\x00\x00\x01\x00\x02\x001
   s>     \r\n
   s>     8\r\n
   received frame(size=0; request=1; stream=2; streamflags=; type=command-response; flags=continuation)
   s>     \x00\x00\x00\x01\x00\x02\x002
   s>     \r\n
   s>     0\r\n
   s>     \r\n
   received frame(size=0; request=1; stream=2; streamflags=; type=command-response; flags=eos)
-  abort: redirect responses not yet supported
-  [255]
+  (following redirect to http://*:$HGPORT/api/simplecache/c045a581599d58608efd3d93d8129841f2af04a0) (glob)
+  s>     GET /api/simplecache/c045a581599d58608efd3d93d8129841f2af04a0 HTTP/1.1\r\n
+  s>     Accept-Encoding: identity\r\n
+  s>     accept: application/mercurial-cbor\r\n
+  s>     host: *:$HGPORT\r\n (glob)
+  s>     user-agent: Mercurial debugwireproto\r\n
+  s>     \r\n
+  s> makefile('rb', None)
+  s>     HTTP/1.1 200 OK\r\n
+  s>     Server: testing stub value\r\n
+  s>     Date: $HTTP_DATE$\r\n
+  s>     Content-Type: application/mercurial-cbor\r\n
+  s>     Content-Length: 91\r\n
+  s>     \r\n
+  s>     \xa1Jtotalitems\x01\xa2DnodeT\x99/Gy\x02\x9a=\xf8\xd0fm\x00\xbb\x92OicN&AGparents\x82T\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00T\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00
+  response: gen[
+    {
+      b'totalitems': 1
+    },
+    {
+      b'node': b'\x99/Gy\x02\x9a=\xf8\xd0fm\x00\xbb\x92OicN&A',
+      b'parents': [
+        b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00',
+        b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
+      ]
+    }
+  ]
 
   $ cat error.log
   $ killdaemons.py
 
   $ cat .hg/blackbox.log
   *> cacher constructed for manifestdata (glob)
   *> cache miss for c045a581599d58608efd3d93d8129841f2af04a0 (glob)
   *> storing cache entry for c045a581599d58608efd3d93d8129841f2af04a0 (glob)
   *> cacher constructed for manifestdata (glob)
   *> cache hit for c045a581599d58608efd3d93d8129841f2af04a0 (glob)
   *> sending content redirect for c045a581599d58608efd3d93d8129841f2af04a0 to http://*:$HGPORT/api/simplecache/c045a581599d58608efd3d93d8129841f2af04a0 (glob)