Mercurial > hg
view mercurial/hgweb/server.py @ 36876:97f44b0720e2
hgweb: port archive command to modern response API
Well, I tried to go with PEP 3333's recommendations and only allow
our WSGI application to emit data via a response generator.
Unfortunately, the "archive" command calls into the zipfile and
tarfile modules and these operator on file objects and must send
their data to an object with write(). There's no easy way turn
these write() calls into a generator.
So, we teach our response type how to expose a file object like
object that can be used to write() output. We try to keep the API
consistent with how things work currently: callers must call a
setbody*(), then sendresponse() to trigger sending of headers,
and only then can they get a handle on the object to perform
writing.
This required overloading the return value of @webcommand functions
even more. Fortunately, we're almost completely ported off the
legacy API. So we should be able to simplify matters in the near
future.
A test relying on this functionality has also been updated to use
the new API.
Differential Revision: https://phab.mercurial-scm.org/D2792
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Sat, 10 Mar 2018 20:16:20 -0800 |
parents | 8e1556ac01bb |
children | 5890e5872f36 |
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# 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 os import socket import sys import traceback import wsgiref.validate from ..i18n import _ 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('\n')) def writelines(self, seq): for msg in seq: self.handler.log_error("HG error: %s", msg) class _httprequesthandler(httpservermod.basehttprequesthandler): url_scheme = '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)) + '\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, '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[0] != errno.EPIPE: raise def do_POST(self): try: self.do_write() except Exception: self._start_response("500 Internal Server Error", []) self._write("Internal Server Error") self._done() 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) def do_GET(self): self.do_POST() def do_hgweb(self): self.sent_headers = False path, query = _splitURI(self.path) 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('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('content-length') if length: env[r'CONTENT_LENGTH'] = length for header in [h for h in self.headers.keys() if h not in ('content-type', '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', '').lower() == '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) env[r'wsgi.multiprocess'] = isinstance(self.server, socketserver.ForkingMixIn) 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("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() == '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 == "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): code, msg = http_status.split(None, 1) code = int(code) self.saved_status = http_status bad_headers = ('connection', '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("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("Content-length header sent, but more " "bytes than specified are being written.") self.length = self.length - len(data) elif self._chunked and data: data = '%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('0\r\n\r\n') self.wfile.flush() class _httprequesthandlerssl(_httprequesthandler): """HTTPS handler based on Python's ssl module""" url_scheme = 'https' @staticmethod def preparehttpserver(httpserver, ui): try: from .. import sslutil sslutil.modernssl except ImportError: raise error.Abort(_("SSL support is unavailable")) certfile = ui.config('web', 'certificate') # These config options are currently only meant for testing. Use # at your own risk. cafile = ui.config('devel', 'servercafile') reqcert = ui.configbool('devel', '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, "fork"): _mixin = socketserver.ForkingMixIn else: class _mixin(object): pass def openlog(opt, default): if opt and opt != '-': return open(opt, '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('web', 'prefix') if prefix: prefix = '/' + prefix.strip('/') self.prefix = prefix alog = openlog(ui.config('web', 'accesslog'), ui.fout) elog = openlog(ui.config('web', 'errorlog'), ui.ferr) self.accesslog = alog self.errorlog = elog self.addr, self.port = self.socket.getsockname()[0:2] self.fqaddr = socket.getfqdn(addr[0]) class IPv6HTTPServer(MercurialHTTPServer): address_family = getattr(socket, 'AF_INET6', None) def __init__(self, *args, **kwargs): if self.address_family is None: raise error.RepoError(_('IPv6 is not available on this system')) super(IPv6HTTPServer, self).__init__(*args, **kwargs) def create_server(ui, app): if ui.config('web', 'certificate'): handler = _httprequesthandlerssl else: handler = _httprequesthandler if ui.configbool('web', '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 reload(sys) # resurrect sys.setdefaultencoding() oldenc = sys.getdefaultencoding() sys.setdefaultencoding("latin1") # or any full 8-bit encoding mimetypes.init() sys.setdefaultencoding(oldenc) address = ui.config('web', 'address') port = util.getport(ui.config('web', 'port')) try: return cls(ui, app, (address, port), handler) except socket.error as inst: raise error.Abort(_("cannot start server at '%s:%d': %s") % (address, port, encoding.strtolocal(inst.args[1])))