Mercurial > hg
view mercurial/httppeer.py @ 27015:341cb90ffd18
util: disable floating point stat times (issue4836)
Alternate fix for this issue which avoids putting extra function calls
and exception handling in the fast path.
For almost all purposes, integer timestamps are preferable to
Mercurial. It stores integer timestamps in the dirstate and would thus
like to avoid doing any float/int comparisons or conversions. We will
continue to have to deal with 1-second granularity on filesystems for
quite some time, so this won't significantly hinder our capabilities.
This has some impact on our file cache validation code in that it
lowers timestamp resolution. But as we still have to deal with
low-resolution filesystems, we're not relying on this anyway.
An alternate approach is to use stat[ST_MTIME], which is guaranteed to
be an integer. But since this support isn't already in our extension,
we can't depend on it being available without adding a hard Python->C
API dependency that's painful for people like yours truly who have
bisect regularly and people without compilers.
author | Matt Mackall <mpm@selenic.com> |
---|---|
date | Thu, 19 Nov 2015 13:21:24 -0600 |
parents | 56b2bcea2529 |
children | b502138f5faa |
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# httppeer.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 __future__ import absolute_import import errno import httplib import os import socket import tempfile import urllib import urllib2 import zlib from .i18n import _ from .node import nullid from . import ( changegroup, error, httpconnection, statichttprepo, url, util, wireproto, ) 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 httppeer(wireproto.wirepeer): def __init__(self, ui, path): self.path = path self.caps = None self.handler = None self.urlopener = None self.requestbuilder = None 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 self._url, authinfo = u.authinfo() self.ui = ui self.ui.debug('using %s\n' % self._url) self.urlopener = url.opener(ui, authinfo) self.requestbuilder = urllib2.Request def __del__(self): if self.urlopener: for h in self.urlopener.handlers: h.close() getattr(h, "close_all", lambda : None)() def url(self): return self.path # look up capabilities only when needed def _fetchcaps(self): self.caps = set(self._call('capabilities').split()) def _capabilities(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 def lock(self): raise error.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 data is not None and 'Content-Type' not in headers: headers['Content-Type'] = 'application/mercurial-0.1' 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 = self.requestbuilder(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 as inst: if inst.code == 401: raise error.Abort(_('authorization failed')) raise except httplib.HTTPException as 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 error.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) if proto.startswith('application/hg-error'): raise error.OutOfBandError(resp.read()) # accept old "text/plain" and "application/hg-changegroup" for now if not (proto.startswith('application/mercurial-') or (proto.startswith('text/plain') and not resp.headers.get('content-length')) 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(1024))) 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(self.ui, cg, None, type) fp = httpconnection.httpsendfile(self.ui, tempname, "rb") headers = {'Content-Type': '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 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 = tempfile.mkstemp(prefix="hg-bundle-", suffix=".hg") fh = os.fdopen(fd, "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 = {'Content-Type': '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): stream = self._callstream(cmd, **args) return util.chunkbuffer(zgenerator(stream)) def _abort(self, exception): raise exception class httpspeer(httppeer): def __init__(self, ui, path): if not url.has_https: raise error.Abort(_('Python support for SSL and HTTPS ' 'is not installed')) httppeer.__init__(self, ui, path) def instance(ui, path, create): if create: raise error.Abort(_('cannot create new http repository')) try: if path.startswith('https:'): inst = httpspeer(ui, path) else: inst = httppeer(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 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