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hgweb: protocol functions take repo instead of web...
hgweb: protocol functions take repo instead of web This makes it much easier for implementers of hgweb alternatives to simply call into protocol functions after setting up a repo and a request.

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protocol.py
208 lines | 6.6 KiB | text/x-python | PythonLexer
#
# Copyright 21 May 2005 - (c) 2005 Jake Edge <jake@edge2.net>
# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.
import cStringIO, zlib, tempfile, errno, os, sys
from mercurial import util, streamclone
from mercurial.node import bin, hex
from mercurial import changegroup as changegroupmod
from common import HTTP_OK, HTTP_NOT_FOUND, HTTP_SERVER_ERROR
# __all__ is populated with the allowed commands. Be sure to add to it if
# you're adding a new command, or the new command won't work.
__all__ = [
'lookup', 'heads', 'branches', 'between', 'changegroup',
'changegroupsubset', 'capabilities', 'unbundle', 'stream_out',
]
HGTYPE = 'application/mercurial-0.1'
def lookup(repo, req):
try:
r = hex(repo.lookup(req.form['key'][0]))
success = 1
except Exception,inst:
r = str(inst)
success = 0
resp = "%s %s\n" % (success, r)
req.respond(HTTP_OK, HGTYPE, length=len(resp))
req.write(resp)
def heads(repo, req):
resp = " ".join(map(hex, repo.heads())) + "\n"
req.respond(HTTP_OK, HGTYPE, length=len(resp))
req.write(resp)
def branches(repo, req):
nodes = []
if 'nodes' in req.form:
nodes = map(bin, req.form['nodes'][0].split(" "))
resp = cStringIO.StringIO()
for b in repo.branches(nodes):
resp.write(" ".join(map(hex, b)) + "\n")
resp = resp.getvalue()
req.respond(HTTP_OK, HGTYPE, length=len(resp))
req.write(resp)
def between(repo, req):
if 'pairs' in req.form:
pairs = [map(bin, p.split("-"))
for p in req.form['pairs'][0].split(" ")]
resp = cStringIO.StringIO()
for b in repo.between(pairs):
resp.write(" ".join(map(hex, b)) + "\n")
resp = resp.getvalue()
req.respond(HTTP_OK, HGTYPE, length=len(resp))
req.write(resp)
def changegroup(repo, req):
req.respond(HTTP_OK, HGTYPE)
nodes = []
if 'roots' in req.form:
nodes = map(bin, req.form['roots'][0].split(" "))
z = zlib.compressobj()
f = repo.changegroup(nodes, 'serve')
while 1:
chunk = f.read(4096)
if not chunk:
break
req.write(z.compress(chunk))
req.write(z.flush())
def changegroupsubset(repo, req):
req.respond(HTTP_OK, HGTYPE)
bases = []
heads = []
if 'bases' in req.form:
bases = [bin(x) for x in req.form['bases'][0].split(' ')]
if 'heads' in req.form:
heads = [bin(x) for x in req.form['heads'][0].split(' ')]
z = zlib.compressobj()
f = repo.changegroupsubset(bases, heads, 'serve')
while 1:
chunk = f.read(4096)
if not chunk:
break
req.write(z.compress(chunk))
req.write(z.flush())
def capabilities(repo, req):
caps = ['lookup', 'changegroupsubset']
if repo.ui.configbool('server', 'uncompressed', untrusted=True):
caps.append('stream=%d' % repo.changelog.version)
if changegroupmod.bundlepriority:
caps.append('unbundle=%s' % ','.join(changegroupmod.bundlepriority))
rsp = ' '.join(caps)
req.respond(HTTP_OK, HGTYPE, length=len(rsp))
req.write(rsp)
def unbundle(repo, req):
def bail(response, headers={}):
length = int(req.env.get('CONTENT_LENGTH', 0))
for s in util.filechunkiter(req, limit=length):
# drain incoming bundle, else client will not see
# response when run outside cgi script
pass
status = headers.pop('status', HTTP_OK)
req.header(headers.items())
req.respond(status, HGTYPE)
req.write('0\n')
req.write(response)
proto = req.env.get('wsgi.url_scheme') or 'http'
their_heads = req.form['heads'][0].split(' ')
def check_heads():
heads = map(hex, repo.heads())
return their_heads == [hex('force')] or their_heads == heads
# fail early if possible
if not check_heads():
bail('unsynced changes\n')
return
req.respond(HTTP_OK, HGTYPE)
# do not lock repo until all changegroup data is
# streamed. save to temporary file.
fd, tempname = tempfile.mkstemp(prefix='hg-unbundle-')
fp = os.fdopen(fd, 'wb+')
try:
length = int(req.env['CONTENT_LENGTH'])
for s in util.filechunkiter(req, limit=length):
fp.write(s)
try:
lock = repo.lock()
try:
if not check_heads():
req.write('0\n')
req.write('unsynced changes\n')
return
fp.seek(0)
header = fp.read(6)
if header.startswith('HG') and not header.startswith('HG10'):
raise ValueError('unknown bundle version')
elif header not in changegroupmod.bundletypes:
raise ValueError('unknown bundle compression type')
gen = changegroupmod.unbundle(header, fp)
# send addchangegroup output to client
oldio = sys.stdout, sys.stderr
sys.stderr = sys.stdout = cStringIO.StringIO()
try:
url = 'remote:%s:%s' % (proto,
req.env.get('REMOTE_HOST', ''))
try:
ret = repo.addchangegroup(gen, 'serve', url)
except util.Abort, inst:
sys.stdout.write("abort: %s\n" % inst)
ret = 0
finally:
val = sys.stdout.getvalue()
sys.stdout, sys.stderr = oldio
req.write('%d\n' % ret)
req.write(val)
finally:
del lock
except ValueError, inst:
req.write('0\n')
req.write(str(inst) + '\n')
except (OSError, IOError), inst:
req.write('0\n')
filename = getattr(inst, 'filename', '')
# Don't send our filesystem layout to the client
if filename.startswith(repo.root):
filename = filename[len(repo.root)+1:]
else:
filename = ''
error = getattr(inst, 'strerror', 'Unknown error')
if inst.errno == errno.ENOENT:
code = HTTP_NOT_FOUND
else:
code = HTTP_SERVER_ERROR
req.respond(code)
req.write('%s: %s\n' % (error, filename))
finally:
fp.close()
os.unlink(tempname)
def stream_out(repo, req):
req.respond(HTTP_OK, HGTYPE)
streamclone.stream_out(repo, req, untrusted=True)