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738dae163d
Quoting PEP 333 (WSGI): "If the iterable returned by the application has a close() method, the server or gateway must call that method upon completion of the current request, whether the request was completed normally, or terminated early due to an error. (This is to support resource release by the application. This protocol is intended to complement PEP 325's generator support, and other common iterables with close() methods."
78 lines
2.5 KiB
Python
78 lines
2.5 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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def launch(application):
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util.set_binary(sys.stdin)
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util.set_binary(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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environ['wsgi.input'] = sys.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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finally:
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if hasattr(content, 'close'):
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content.close()
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