--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mercurial/hgweb/protocol.py	Mon Dec 03 12:27:11 2007 +0100
@@ -0,0 +1,237 @@
+#
+# 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, bz2, tempfile, errno, os, sys
+from mercurial import util, streamclone
+from mercurial.i18n import gettext as _
+from mercurial.node import *
+
+def lookup(web, req):
+    try:
+        r = hex(web.repo.lookup(req.form['key'][0]))
+        success = 1
+    except Exception,inst:
+        r = str(inst)
+        success = 0
+    resp = "%s %s\n" % (success, r)
+    req.httphdr("application/mercurial-0.1", length=len(resp))
+    req.write(resp)
+
+def heads(web, req):
+    resp = " ".join(map(hex, web.repo.heads())) + "\n"
+    req.httphdr("application/mercurial-0.1", length=len(resp))
+    req.write(resp)
+
+def branches(web, req):
+    nodes = []
+    if req.form.has_key('nodes'):
+        nodes = map(bin, req.form['nodes'][0].split(" "))
+    resp = cStringIO.StringIO()
+    for b in web.repo.branches(nodes):
+        resp.write(" ".join(map(hex, b)) + "\n")
+    resp = resp.getvalue()
+    req.httphdr("application/mercurial-0.1", length=len(resp))
+    req.write(resp)
+
+def between(web, req):
+    if req.form.has_key('pairs'):
+        pairs = [map(bin, p.split("-"))
+                 for p in req.form['pairs'][0].split(" ")]
+    resp = cStringIO.StringIO()
+    for b in web.repo.between(pairs):
+        resp.write(" ".join(map(hex, b)) + "\n")
+    resp = resp.getvalue()
+    req.httphdr("application/mercurial-0.1", length=len(resp))
+    req.write(resp)
+
+def changegroup(web, req):
+    req.httphdr("application/mercurial-0.1")
+    nodes = []
+    if not web.allowpull:
+        return
+
+    if req.form.has_key('roots'):
+        nodes = map(bin, req.form['roots'][0].split(" "))
+
+    z = zlib.compressobj()
+    f = web.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(web, req):
+    req.httphdr("application/mercurial-0.1")
+    bases = []
+    heads = []
+    if not web.allowpull:
+        return
+
+    if req.form.has_key('bases'):
+        bases = [bin(x) for x in req.form['bases'][0].split(' ')]
+    if req.form.has_key('heads'):
+        heads = [bin(x) for x in req.form['heads'][0].split(' ')]
+
+    z = zlib.compressobj()
+    f = web.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(web, req):
+    caps = ['lookup', 'changegroupsubset']
+    if web.configbool('server', 'uncompressed'):
+        caps.append('stream=%d' % web.repo.changelog.version)
+    # XXX: make configurable and/or share code with do_unbundle:
+    unbundleversions = ['HG10GZ', 'HG10BZ', 'HG10UN']
+    if unbundleversions:
+        caps.append('unbundle=%s' % ','.join(unbundleversions))
+    resp = ' '.join(caps)
+    req.httphdr("application/mercurial-0.1", length=len(resp))
+    req.write(resp)
+
+def unbundle(web, req):
+    def bail(response, headers={}):
+        length = int(req.env['CONTENT_LENGTH'])
+        for s in util.filechunkiter(req, limit=length):
+            # drain incoming bundle, else client will not see
+            # response when run outside cgi script
+            pass
+        req.httphdr("application/mercurial-0.1", headers=headers)
+        req.write('0\n')
+        req.write(response)
+
+    # require ssl by default, auth info cannot be sniffed and
+    # replayed
+    ssl_req = web.configbool('web', 'push_ssl', True)
+    if ssl_req:
+        if req.env.get('wsgi.url_scheme') != 'https':
+            bail(_('ssl required\n'))
+            return
+        proto = 'https'
+    else:
+        proto = 'http'
+
+    # do not allow push unless explicitly allowed
+    if not web.check_perm(req, 'push', False):
+        bail(_('push not authorized\n'),
+             headers={'status': '401 Unauthorized'})
+        return
+
+    their_heads = req.form['heads'][0].split(' ')
+
+    def check_heads():
+        heads = map(hex, web.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.httphdr("application/mercurial-0.1")
+
+    # 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 = web.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 not header.startswith("HG"):
+                    # old client with uncompressed bundle
+                    def generator(f):
+                        yield header
+                        for chunk in f:
+                            yield chunk
+                elif not header.startswith("HG10"):
+                    req.write("0\n")
+                    req.write(_("unknown bundle version\n"))
+                    return
+                elif header == "HG10GZ":
+                    def generator(f):
+                        zd = zlib.decompressobj()
+                        for chunk in f:
+                            yield zd.decompress(chunk)
+                elif header == "HG10BZ":
+                    def generator(f):
+                        zd = bz2.BZ2Decompressor()
+                        zd.decompress("BZ")
+                        for chunk in f:
+                            yield zd.decompress(chunk)
+                elif header == "HG10UN":
+                    def generator(f):
+                        for chunk in f:
+                            yield chunk
+                else:
+                    req.write("0\n")
+                    req.write(_("unknown bundle compression type\n"))
+                    return
+                gen = generator(util.filechunkiter(fp, 4096))
+
+                # send addchangegroup output to client
+
+                old_stdout = sys.stdout
+                sys.stdout = cStringIO.StringIO()
+
+                try:
+                    url = 'remote:%s:%s' % (proto,
+                                            req.env.get('REMOTE_HOST', ''))
+                    try:
+                        ret = web.repo.addchangegroup(
+                                    util.chunkbuffer(gen), 'serve', url)
+                    except util.Abort, inst:
+                        sys.stdout.write("abort: %s\n" % inst)
+                        ret = 0
+                finally:
+                    val = sys.stdout.getvalue()
+                    sys.stdout = old_stdout
+                req.write('%d\n' % ret)
+                req.write(val)
+            finally:
+                del lock
+        except (OSError, IOError), inst:
+            req.write('0\n')
+            filename = getattr(inst, 'filename', '')
+            # Don't send our filesystem layout to the client
+            if filename.startswith(web.repo.root):
+                filename = filename[len(web.repo.root)+1:]
+            else:
+                filename = ''
+            error = getattr(inst, 'strerror', 'Unknown error')
+            if inst.errno == errno.ENOENT:
+                code = 404
+            else:
+                code = 500
+            req.respond(code, '%s: %s\n' % (error, filename))
+    finally:
+        fp.close()
+        os.unlink(tempname)
+
+def stream_out(web, req):
+    req.httphdr("application/mercurial-0.1")
+    streamclone.stream_out(web.repo, req, untrusted=True)