author | Matt Mackall <mpm@selenic.com> |
Thu, 26 Jul 2007 12:02:58 -0500 | |
changeset 5008 | 3addf4531643 |
parent 4869 | be591b740e0f |
permissions | -rw-r--r-- |
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# 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 |
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# of the GNU General Public License, incorporated herein by reference. |
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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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|
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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.items()) |
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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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result = application(environ, start_response) |
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try: |
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for data in result: |
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if data: # don't send headers until body appears |
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write(data) |
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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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if hasattr(result,'close'): |
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result.close() |