copies: avoid instancing more changectx to access parent revisions
We just need to know the revision numbers of the parents, creating full context
is needlessly expensive.
This provide a small, but noticeable performance boost.
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Differential Revision: https://phab.mercurial-scm.org/D7122
# hgweb/server.py - The standalone hg web server.
#
# 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 version 2 or any later version.
from __future__ import absolute_import
import errno
import importlib
import os
import socket
import sys
import traceback
import wsgiref.validate
from ..i18n import _
from ..pycompat import (
getattr,
open,
)
from .. import (
encoding,
error,
pycompat,
util,
)
httpservermod = util.httpserver
socketserver = util.socketserver
urlerr = util.urlerr
urlreq = util.urlreq
from . import common
def _splitURI(uri):
"""Return path and query that has been split from uri
Just like CGI environment, the path is unquoted, the query is
not.
"""
if r'?' in uri:
path, query = uri.split(r'?', 1)
else:
path, query = uri, r''
return urlreq.unquote(path), query
class _error_logger(object):
def __init__(self, handler):
self.handler = handler
def flush(self):
pass
def write(self, str):
self.writelines(str.split(b'\n'))
def writelines(self, seq):
for msg in seq:
self.handler.log_error(r"HG error: %s", encoding.strfromlocal(msg))
class _httprequesthandler(httpservermod.basehttprequesthandler):
url_scheme = b'http'
@staticmethod
def preparehttpserver(httpserver, ui):
"""Prepare .socket of new HTTPServer instance"""
def __init__(self, *args, **kargs):
self.protocol_version = r'HTTP/1.1'
httpservermod.basehttprequesthandler.__init__(self, *args, **kargs)
def _log_any(self, fp, format, *args):
fp.write(
pycompat.sysbytes(
r"%s - - [%s] %s"
% (
self.client_address[0],
self.log_date_time_string(),
format % args,
)
)
+ b'\n'
)
fp.flush()
def log_error(self, format, *args):
self._log_any(self.server.errorlog, format, *args)
def log_message(self, format, *args):
self._log_any(self.server.accesslog, format, *args)
def log_request(self, code=r'-', size=r'-'):
xheaders = []
if util.safehasattr(self, b'headers'):
xheaders = [
h for h in self.headers.items() if h[0].startswith(r'x-')
]
self.log_message(
r'"%s" %s %s%s',
self.requestline,
str(code),
str(size),
r''.join([r' %s:%s' % h for h in sorted(xheaders)]),
)
def do_write(self):
try:
self.do_hgweb()
except socket.error as inst:
if inst.errno != errno.EPIPE:
raise
def do_POST(self):
try:
self.do_write()
except Exception as e:
# I/O below could raise another exception. So log the original
# exception first to ensure it is recorded.
if not (
isinstance(e, (OSError, socket.error))
and e.errno == errno.ECONNRESET
):
tb = r"".join(traceback.format_exception(*sys.exc_info()))
# We need a native-string newline to poke in the log
# message, because we won't get a newline when using an
# r-string. This is the easy way out.
newline = chr(10)
self.log_error(
r"Exception happened during processing "
r"request '%s':%s%s",
self.path,
newline,
tb,
)
self._start_response(r"500 Internal Server Error", [])
self._write(b"Internal Server Error")
self._done()
def do_PUT(self):
self.do_POST()
def do_GET(self):
self.do_POST()
def do_hgweb(self):
self.sent_headers = False
path, query = _splitURI(self.path)
# Ensure the slicing of path below is valid
if path != self.server.prefix and not path.startswith(
self.server.prefix + b'/'
):
self._start_response(pycompat.strurl(common.statusmessage(404)), [])
if self.command == b'POST':
# Paranoia: tell the client we're going to close the
# socket so they don't try and reuse a socket that
# might have a POST body waiting to confuse us. We do
# this by directly munging self.saved_headers because
# self._start_response ignores Connection headers.
self.saved_headers = [(r'Connection', r'Close')]
self._write(b"Not Found")
self._done()
return
env = {}
env[r'GATEWAY_INTERFACE'] = r'CGI/1.1'
env[r'REQUEST_METHOD'] = self.command
env[r'SERVER_NAME'] = self.server.server_name
env[r'SERVER_PORT'] = str(self.server.server_port)
env[r'REQUEST_URI'] = self.path
env[r'SCRIPT_NAME'] = pycompat.sysstr(self.server.prefix)
env[r'PATH_INFO'] = pycompat.sysstr(path[len(self.server.prefix) :])
env[r'REMOTE_HOST'] = self.client_address[0]
env[r'REMOTE_ADDR'] = self.client_address[0]
env[r'QUERY_STRING'] = query or r''
if pycompat.ispy3:
if self.headers.get_content_type() is None:
env[r'CONTENT_TYPE'] = self.headers.get_default_type()
else:
env[r'CONTENT_TYPE'] = self.headers.get_content_type()
length = self.headers.get(r'content-length')
else:
if self.headers.typeheader is None:
env[r'CONTENT_TYPE'] = self.headers.type
else:
env[r'CONTENT_TYPE'] = self.headers.typeheader
length = self.headers.getheader(r'content-length')
if length:
env[r'CONTENT_LENGTH'] = length
for header in [
h
for h in self.headers.keys()
if h.lower() not in (r'content-type', r'content-length')
]:
hkey = r'HTTP_' + header.replace(r'-', r'_').upper()
hval = self.headers.get(header)
hval = hval.replace(r'\n', r'').strip()
if hval:
env[hkey] = hval
env[r'SERVER_PROTOCOL'] = self.request_version
env[r'wsgi.version'] = (1, 0)
env[r'wsgi.url_scheme'] = pycompat.sysstr(self.url_scheme)
if env.get(r'HTTP_EXPECT', b'').lower() == b'100-continue':
self.rfile = common.continuereader(self.rfile, self.wfile.write)
env[r'wsgi.input'] = self.rfile
env[r'wsgi.errors'] = _error_logger(self)
env[r'wsgi.multithread'] = isinstance(
self.server, socketserver.ThreadingMixIn
)
if util.safehasattr(socketserver, b'ForkingMixIn'):
env[r'wsgi.multiprocess'] = isinstance(
self.server, socketserver.ForkingMixIn
)
else:
env[r'wsgi.multiprocess'] = False
env[r'wsgi.run_once'] = 0
wsgiref.validate.check_environ(env)
self.saved_status = None
self.saved_headers = []
self.length = None
self._chunked = None
for chunk in self.server.application(env, self._start_response):
self._write(chunk)
if not self.sent_headers:
self.send_headers()
self._done()
def send_headers(self):
if not self.saved_status:
raise AssertionError(
b"Sending headers before start_response() called"
)
saved_status = self.saved_status.split(None, 1)
saved_status[0] = int(saved_status[0])
self.send_response(*saved_status)
self.length = None
self._chunked = False
for h in self.saved_headers:
self.send_header(*h)
if h[0].lower() == r'content-length':
self.length = int(h[1])
if self.length is None and saved_status[0] != common.HTTP_NOT_MODIFIED:
self._chunked = (
not self.close_connection
and self.request_version == r'HTTP/1.1'
)
if self._chunked:
self.send_header(r'Transfer-Encoding', r'chunked')
else:
self.send_header(r'Connection', r'close')
self.end_headers()
self.sent_headers = True
def _start_response(self, http_status, headers, exc_info=None):
assert isinstance(http_status, str)
code, msg = http_status.split(None, 1)
code = int(code)
self.saved_status = http_status
bad_headers = (r'connection', r'transfer-encoding')
self.saved_headers = [
h for h in headers if h[0].lower() not in bad_headers
]
return self._write
def _write(self, data):
if not self.saved_status:
raise AssertionError(b"data written before start_response() called")
elif not self.sent_headers:
self.send_headers()
if self.length is not None:
if len(data) > self.length:
raise AssertionError(
b"Content-length header sent, but more "
b"bytes than specified are being written."
)
self.length = self.length - len(data)
elif self._chunked and data:
data = b'%x\r\n%s\r\n' % (len(data), data)
self.wfile.write(data)
self.wfile.flush()
def _done(self):
if self._chunked:
self.wfile.write(b'0\r\n\r\n')
self.wfile.flush()
def version_string(self):
if self.server.serverheader:
return encoding.strfromlocal(self.server.serverheader)
return httpservermod.basehttprequesthandler.version_string(self)
class _httprequesthandlerssl(_httprequesthandler):
"""HTTPS handler based on Python's ssl module"""
url_scheme = b'https'
@staticmethod
def preparehttpserver(httpserver, ui):
try:
from .. import sslutil
sslutil.modernssl
except ImportError:
raise error.Abort(_(b"SSL support is unavailable"))
certfile = ui.config(b'web', b'certificate')
# These config options are currently only meant for testing. Use
# at your own risk.
cafile = ui.config(b'devel', b'servercafile')
reqcert = ui.configbool(b'devel', b'serverrequirecert')
httpserver.socket = sslutil.wrapserversocket(
httpserver.socket,
ui,
certfile=certfile,
cafile=cafile,
requireclientcert=reqcert,
)
def setup(self):
self.connection = self.request
self.rfile = self.request.makefile(r"rb", self.rbufsize)
self.wfile = self.request.makefile(r"wb", self.wbufsize)
try:
import threading
threading.activeCount() # silence pyflakes and bypass demandimport
_mixin = socketserver.ThreadingMixIn
except ImportError:
if util.safehasattr(os, b"fork"):
_mixin = socketserver.ForkingMixIn
else:
class _mixin(object):
pass
def openlog(opt, default):
if opt and opt != b'-':
return open(opt, b'ab')
return default
class MercurialHTTPServer(_mixin, httpservermod.httpserver, object):
# SO_REUSEADDR has broken semantics on windows
if pycompat.iswindows:
allow_reuse_address = 0
def __init__(self, ui, app, addr, handler, **kwargs):
httpservermod.httpserver.__init__(self, addr, handler, **kwargs)
self.daemon_threads = True
self.application = app
handler.preparehttpserver(self, ui)
prefix = ui.config(b'web', b'prefix')
if prefix:
prefix = b'/' + prefix.strip(b'/')
self.prefix = prefix
alog = openlog(ui.config(b'web', b'accesslog'), ui.fout)
elog = openlog(ui.config(b'web', b'errorlog'), ui.ferr)
self.accesslog = alog
self.errorlog = elog
self.addr, self.port = self.socket.getsockname()[0:2]
self.fqaddr = socket.getfqdn(addr[0])
self.serverheader = ui.config(b'web', b'server-header')
class IPv6HTTPServer(MercurialHTTPServer):
address_family = getattr(socket, 'AF_INET6', None)
def __init__(self, *args, **kwargs):
if self.address_family is None:
raise error.RepoError(_(b'IPv6 is not available on this system'))
super(IPv6HTTPServer, self).__init__(*args, **kwargs)
def create_server(ui, app):
if ui.config(b'web', b'certificate'):
handler = _httprequesthandlerssl
else:
handler = _httprequesthandler
if ui.configbool(b'web', b'ipv6'):
cls = IPv6HTTPServer
else:
cls = MercurialHTTPServer
# ugly hack due to python issue5853 (for threaded use)
try:
import mimetypes
mimetypes.init()
except UnicodeDecodeError:
# Python 2.x's mimetypes module attempts to decode strings
# from Windows' ANSI APIs as ascii (fail), then re-encode them
# as ascii (clown fail), because the default Python Unicode
# codec is hardcoded as ascii.
sys.argv # unwrap demand-loader so that reload() works
# resurrect sys.setdefaultencoding()
try:
importlib.reload(sys)
except AttributeError:
reload(sys)
oldenc = sys.getdefaultencoding()
sys.setdefaultencoding(b"latin1") # or any full 8-bit encoding
mimetypes.init()
sys.setdefaultencoding(oldenc)
address = ui.config(b'web', b'address')
port = util.getport(ui.config(b'web', b'port'))
try:
return cls(ui, app, (address, port), handler)
except socket.error as inst:
raise error.Abort(
_(b"cannot start server at '%s:%d': %s")
% (address, port, encoding.strtolocal(inst.args[1]))
)