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# statichttprepo.py - simple http repository class for mercurial
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#
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# This provides read-only repo access to repositories exported via static http
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#
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# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from i18n import _
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import changelog, byterange, url, error
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import localrepo, manifest, util, store
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import urllib, urllib2, errno
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class httprangereader(object):
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def __init__(self, url, opener):
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# we assume opener has HTTPRangeHandler
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self.url = url
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self.pos = 0
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self.opener = opener
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self.name = url
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def seek(self, pos):
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self.pos = pos
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def read(self, bytes=None):
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req = urllib2.Request(self.url)
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end = ''
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if bytes:
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end = self.pos + bytes - 1
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req.add_header('Range', 'bytes=%d-%s' % (self.pos, end))
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try:
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f = self.opener.open(req)
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data = f.read()
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if hasattr(f, 'getcode'):
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# python 2.6+
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code = f.getcode()
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elif hasattr(f, 'code'):
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# undocumented attribute, seems to be set in 2.4 and 2.5
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code = f.code
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else:
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# Don't know how to check, hope for the best.
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code = 206
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except urllib2.HTTPError, inst:
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num = inst.code == 404 and errno.ENOENT or None
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raise IOError(num, inst)
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except urllib2.URLError, inst:
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raise IOError(None, inst.reason[1])
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if code == 200:
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# HTTPRangeHandler does nothing if remote does not support
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# Range headers and returns the full entity. Let's slice it.
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if bytes:
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data = data[self.pos:self.pos + bytes]
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else:
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data = data[self.pos:]
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elif bytes:
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data = data[:bytes]
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self.pos += len(data)
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return data
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def __iter__(self):
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return iter(self.read().splitlines(1))
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def close(self):
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pass
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def build_opener(ui, authinfo):
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# urllib cannot handle URLs with embedded user or passwd
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urlopener = url.opener(ui, authinfo)
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urlopener.add_handler(byterange.HTTPRangeHandler())
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def opener(base):
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"""return a function that opens files over http"""
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p = base
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def o(path, mode="r", atomictemp=None):
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if mode not in ('r', 'rb'):
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raise IOError('Permission denied')
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f = "/".join((p, urllib.quote(path)))
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return httprangereader(f, urlopener)
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return o
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return opener
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class statichttprepository(localrepo.localrepository):
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def __init__(self, ui, path):
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self._url = path
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self.ui = ui
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self.root = path
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u = url.url(path.rstrip('/') + "/.hg")
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self.path, authinfo = u.authinfo()
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opener = build_opener(ui, authinfo)
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self.opener = opener(self.path)
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# find requirements
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try:
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requirements = self.opener("requires").read().splitlines()
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except IOError, inst:
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if inst.errno != errno.ENOENT:
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raise
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# check if it is a non-empty old-style repository
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try:
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fp = self.opener("00changelog.i")
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fp.read(1)
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fp.close()
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except IOError, inst:
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if inst.errno != errno.ENOENT:
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raise
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# we do not care about empty old-style repositories here
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msg = _("'%s' does not appear to be an hg repository") % path
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raise error.RepoError(msg)
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requirements = []
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# check them
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for r in requirements:
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if r not in self.supported:
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raise error.RequirementError(
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_("requirement '%s' not supported") % r)
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# setup store
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self.store = store.store(requirements, self.path, opener)
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self.spath = self.store.path
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self.sopener = self.store.opener
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self.sjoin = self.store.join
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self.manifest = manifest.manifest(self.sopener)
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self.changelog = changelog.changelog(self.sopener)
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self._tags = None
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self.nodetagscache = None
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self._branchcache = None
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self._branchcachetip = None
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self.encodepats = None
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self.decodepats = None
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self.capabilities = self.capabilities.difference(["pushkey"])
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def url(self):
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return self._url
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def local(self):
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return False
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def lock(self, wait=True):
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raise util.Abort(_('cannot lock static-http repository'))
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def instance(ui, path, create):
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if create:
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raise util.Abort(_('cannot create new static-http repository'))
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return statichttprepository(ui, path[7:])
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