Imported from /srv/lorry/lorry-area/mercurial-tarball/mercurial-1.9.3.tar.gz.HEADmercurial-1.9.3master

1 files changed, 244 insertions, 0 deletions

diff --git a/mercurial/httprepo.py b/mercurial/httprepo.py
new file mode 100644
index 0000000..d5fd03f
--- /dev/null
+++ b/mercurial/httprepo.py
@@ -0,0 +1,244 @@
+# httprepo.py - HTTP repository proxy classes for mercurial
+#
+# Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
+# Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
+#
+# This software may be used and distributed according to the terms of the
+# GNU General Public License version 2 or any later version.
+
+from node import nullid
+from i18n import _
+import changegroup, statichttprepo, error, httpconnection, url, util, wireproto
+import os, urllib, urllib2, zlib, httplib
+import errno, socket
+
+def zgenerator(f):
+    zd = zlib.decompressobj()
+    try:
+        for chunk in util.filechunkiter(f):
+            while chunk:
+                yield zd.decompress(chunk, 2**18)
+                chunk = zd.unconsumed_tail
+    except httplib.HTTPException:
+        raise IOError(None, _('connection ended unexpectedly'))
+    yield zd.flush()
+
+class httprepository(wireproto.wirerepository):
+    def __init__(self, ui, path):
+        self.path = path
+        self.caps = None
+        self.handler = None
+        u = util.url(path)
+        if u.query or u.fragment:
+            raise util.Abort(_('unsupported URL component: "%s"') %
+                             (u.query or u.fragment))
+
+        # urllib cannot handle URLs with embedded user or passwd
+        self._url, authinfo = u.authinfo()
+
+        self.ui = ui
+        self.ui.debug('using %s\n' % self._url)
+
+        self.urlopener = url.opener(ui, authinfo)
+
+    def __del__(self):
+        for h in self.urlopener.handlers:
+            h.close()
+            if hasattr(h, "close_all"):
+                h.close_all()
+
+    def url(self):
+        return self.path
+
+    # look up capabilities only when needed
+
+    def _fetchcaps(self):
+        self.caps = set(self._call('capabilities').split())
+
+    def get_caps(self):
+        if self.caps is None:
+            try:
+                self._fetchcaps()
+            except error.RepoError:
+                self.caps = set()
+            self.ui.debug('capabilities: %s\n' %
+                          (' '.join(self.caps or ['none'])))
+        return self.caps
+
+    capabilities = property(get_caps)
+
+    def lock(self):
+        raise util.Abort(_('operation not supported over http'))
+
+    def _callstream(self, cmd, **args):
+        if cmd == 'pushkey':
+            args['data'] = ''
+        data = args.pop('data', None)
+        size = 0
+        if util.safehasattr(data, 'length'):
+            size = data.length
+        elif data is not None:
+            size = len(data)
+        headers = args.pop('headers', {})
+
+        if size and self.ui.configbool('ui', 'usehttp2', False):
+            headers['Expect'] = '100-Continue'
+            headers['X-HgHttp2'] = '1'
+
+        self.ui.debug("sending %s command\n" % cmd)
+        q = [('cmd', cmd)]
+        headersize = 0
+        if len(args) > 0:
+            httpheader = self.capable('httpheader')
+            if httpheader:
+                headersize = int(httpheader.split(',')[0])
+        if headersize > 0:
+            # The headers can typically carry more data than the URL.
+            encargs = urllib.urlencode(sorted(args.items()))
+            headerfmt = 'X-HgArg-%s'
+            contentlen = headersize - len(headerfmt % '000' + ': \r\n')
+            headernum = 0
+            for i in xrange(0, len(encargs), contentlen):
+                headernum += 1
+                header = headerfmt % str(headernum)
+                headers[header] = encargs[i:i + contentlen]
+            varyheaders = [headerfmt % str(h) for h in range(1, headernum + 1)]
+            headers['Vary'] = ','.join(varyheaders)
+        else:
+            q += sorted(args.items())
+        qs = '?%s' % urllib.urlencode(q)
+        cu = "%s%s" % (self._url, qs)
+        req = urllib2.Request(cu, data, headers)
+        if data is not None:
+            self.ui.debug("sending %s bytes\n" % size)
+            req.add_unredirected_header('Content-Length', '%d' % size)
+        try:
+            resp = self.urlopener.open(req)
+        except urllib2.HTTPError, inst:
+            if inst.code == 401:
+                raise util.Abort(_('authorization failed'))
+            raise
+        except httplib.HTTPException, inst:
+            self.ui.debug('http error while sending %s command\n' % cmd)
+            self.ui.traceback()
+            raise IOError(None, inst)
+        except IndexError:
+            # this only happens with Python 2.3, later versions raise URLError
+            raise util.Abort(_('http error, possibly caused by proxy setting'))
+        # record the url we got redirected to
+        resp_url = resp.geturl()
+        if resp_url.endswith(qs):
+            resp_url = resp_url[:-len(qs)]
+        if self._url.rstrip('/') != resp_url.rstrip('/'):
+            if not self.ui.quiet:
+                self.ui.warn(_('real URL is %s\n') % resp_url)
+        self._url = resp_url
+        try:
+            proto = resp.getheader('content-type')
+        except AttributeError:
+            proto = resp.headers.get('content-type', '')
+
+        safeurl = util.hidepassword(self._url)
+        # accept old "text/plain" and "application/hg-changegroup" for now
+        if not (proto.startswith('application/mercurial-') or
+                proto.startswith('text/plain') or
+                proto.startswith('application/hg-changegroup')):
+            self.ui.debug("requested URL: '%s'\n" % util.hidepassword(cu))
+            raise error.RepoError(
+                _("'%s' does not appear to be an hg repository:\n"
+                  "---%%<--- (%s)\n%s\n---%%<---\n")
+                % (safeurl, proto or 'no content-type', resp.read()))
+
+        if proto.startswith('application/mercurial-'):
+            try:
+                version = proto.split('-', 1)[1]
+                version_info = tuple([int(n) for n in version.split('.')])
+            except ValueError:
+                raise error.RepoError(_("'%s' sent a broken Content-Type "
+                                        "header (%s)") % (safeurl, proto))
+            if version_info > (0, 1):
+                raise error.RepoError(_("'%s' uses newer protocol %s") %
+                                      (safeurl, version))
+
+        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 changegroup.bundletypes:
+                type = x
+                break
+
+        tempname = changegroup.writebundle(cg, None, type)
+        fp = httpconnection.httpsendfile(self.ui, tempname, "rb")
+        headers = {'Content-Type': 'application/mercurial-0.1'}
+
+        try:
+            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 socket.error, err:
+                if err.args[0] in (errno.ECONNRESET, errno.EPIPE):
+                    raise util.Abort(_('push failed: %s') % err.args[1])
+                raise util.Abort(err.args[1])
+        finally:
+            fp.close()
+            os.unlink(tempname)
+
+    def _abort(self, exception):
+        raise exception
+
+    def _decompress(self, stream):
+        return util.chunkbuffer(zgenerator(stream))
+
+class httpsrepository(httprepository):
+    def __init__(self, ui, path):
+        if not url.has_https:
+            raise util.Abort(_('Python support for SSL and HTTPS '
+                               'is not installed'))
+        httprepository.__init__(self, ui, path)
+
+def instance(ui, path, create):
+    if create:
+        raise util.Abort(_('cannot create new http repository'))
+    try:
+        if path.startswith('https:'):
+            inst = httpsrepository(ui, path)
+        else:
+            inst = httprepository(ui, path)
+        try:
+            # Try to do useful work when checking compatibility.
+            # Usually saves a roundtrip since we want the caps anyway.
+            inst._fetchcaps()
+        except error.RepoError:
+            # No luck, try older compatibility check.
+            inst.between([(nullid, nullid)])
+        return inst
+    except error.RepoError, 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