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33daab8991
The internal WSGI emulation in wsgicgi.py was not fully WSGI compliant and assumed that all responses sent a body. With a9df76d7ca1f that caused a real bug when using hgweb.cgi. wsgicgi.py will now make sure headers always are sent, using the pattern from PEP 333 and similar to how it is done in 38e07483cc16.
84 lines
2.7 KiB
Python
84 lines
2.7 KiB
Python
# hgweb/wsgicgi.py - CGI->WSGI translator
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#
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# Copyright 2006 Eric Hopper <hopper@omnifarious.org>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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#
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# This was originally copied from the public domain code at
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# http://www.python.org/dev/peps/pep-0333/#the-server-gateway-side
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import os, sys
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from mercurial import util
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from mercurial.hgweb import common
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def launch(application):
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util.setbinary(sys.stdin)
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util.setbinary(sys.stdout)
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environ = dict(os.environ.iteritems())
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environ.setdefault('PATH_INFO', '')
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if environ.get('SERVER_SOFTWARE', '').startswith('Microsoft-IIS'):
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# IIS includes script_name in PATH_INFO
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scriptname = environ['SCRIPT_NAME']
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if environ['PATH_INFO'].startswith(scriptname):
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environ['PATH_INFO'] = environ['PATH_INFO'][len(scriptname):]
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stdin = sys.stdin
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if environ.get('HTTP_EXPECT', '').lower() == '100-continue':
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stdin = common.continuereader(stdin, sys.stdout.write)
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environ['wsgi.input'] = stdin
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environ['wsgi.errors'] = sys.stderr
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environ['wsgi.version'] = (1, 0)
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environ['wsgi.multithread'] = False
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environ['wsgi.multiprocess'] = True
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environ['wsgi.run_once'] = True
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if environ.get('HTTPS', 'off').lower() in ('on', '1', 'yes'):
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environ['wsgi.url_scheme'] = 'https'
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else:
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environ['wsgi.url_scheme'] = 'http'
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headers_set = []
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headers_sent = []
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out = sys.stdout
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def write(data):
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if not headers_set:
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raise AssertionError("write() before start_response()")
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elif not headers_sent:
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# Before the first output, send the stored headers
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status, response_headers = headers_sent[:] = headers_set
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out.write('Status: %s\r\n' % status)
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for header in response_headers:
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out.write('%s: %s\r\n' % header)
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out.write('\r\n')
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out.write(data)
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out.flush()
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def start_response(status, response_headers, exc_info=None):
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if exc_info:
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try:
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if headers_sent:
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# Re-raise original exception if headers sent
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raise exc_info[0](exc_info[1], exc_info[2])
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finally:
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exc_info = None # avoid dangling circular ref
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elif headers_set:
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raise AssertionError("Headers already set!")
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headers_set[:] = [status, response_headers]
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return write
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content = application(environ, start_response)
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try:
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for chunk in content:
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write(chunk)
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if not headers_sent:
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write('') # send headers now if body was empty
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finally:
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getattr(content, 'close', lambda : None)()
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