Mercurial > hg
view mercurial/hgweb/wsgicgi.py @ 35984:cdc93fe1da77
wireprotoserver: move protocol parsing and dispatch out of hgweb
Previously, hgweb_mod had code for detecting if the request
was for the wire protocol. It would then (eventually) call
wireprotoserver.callhttp() to dispatch the request handling.
Detection of wire protocol requests is not trivial. There's
currently a big gotcha in the handling of the "cmd" request
parameter, for example.
Furthermore, in the near future we will have a second HTTP
protocol handler. Its mechanism for calling commands will be
a bit different. And we don't want the low-level logic for
detecting protocol commands to live in hgweb.
We establish a new function in wireprotoserver for detecting
an HTTP protocol request and for giving the caller an easy-to-use
mechanism for dispatching requests to it.
Some wire protocol specific functionality still lives in hgweb.
This will be addressed in subsequent commits.
Differential Revision: https://phab.mercurial-scm.org/D2019
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Wed, 31 Jan 2018 16:21:43 -0800 |
parents | 482d6f6dba91 |
children | d4a2e0d5d042 |
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# hgweb/wsgicgi.py - CGI->WSGI translator # # Copyright 2006 Eric Hopper <hopper@omnifarious.org> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. # # This was originally copied from the public domain code at # http://www.python.org/dev/peps/pep-0333/#the-server-gateway-side from __future__ import absolute_import from .. import ( encoding, util, ) from . import ( common, ) def launch(application): util.setbinary(util.stdin) util.setbinary(util.stdout) environ = dict(encoding.environ.iteritems()) environ.setdefault(r'PATH_INFO', '') if environ.get(r'SERVER_SOFTWARE', r'').startswith(r'Microsoft-IIS'): # IIS includes script_name in PATH_INFO scriptname = environ[r'SCRIPT_NAME'] if environ[r'PATH_INFO'].startswith(scriptname): environ[r'PATH_INFO'] = environ[r'PATH_INFO'][len(scriptname):] stdin = util.stdin if environ.get(r'HTTP_EXPECT', r'').lower() == r'100-continue': stdin = common.continuereader(stdin, util.stdout.write) environ[r'wsgi.input'] = stdin environ[r'wsgi.errors'] = util.stderr environ[r'wsgi.version'] = (1, 0) environ[r'wsgi.multithread'] = False environ[r'wsgi.multiprocess'] = True environ[r'wsgi.run_once'] = True if environ.get(r'HTTPS', r'off').lower() in (r'on', r'1', r'yes'): environ[r'wsgi.url_scheme'] = r'https' else: environ[r'wsgi.url_scheme'] = r'http' headers_set = [] headers_sent = [] out = util.stdout def write(data): if not headers_set: raise AssertionError("write() before start_response()") elif not headers_sent: # Before the first output, send the stored headers status, response_headers = headers_sent[:] = headers_set out.write('Status: %s\r\n' % status) for header in response_headers: out.write('%s: %s\r\n' % header) out.write('\r\n') out.write(data) out.flush() def start_response(status, response_headers, exc_info=None): if exc_info: try: if headers_sent: # Re-raise original exception if headers sent raise exc_info[0](exc_info[1], exc_info[2]) finally: exc_info = None # avoid dangling circular ref elif headers_set: raise AssertionError("Headers already set!") headers_set[:] = [status, response_headers] return write content = application(environ, start_response) try: for chunk in content: write(chunk) if not headers_sent: write('') # send headers now if body was empty finally: getattr(content, 'close', lambda: None)()