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Viewing changes to MoinMoin/web/_fallback_cgi.py

  • Committer: Bazaar Package Importer
  • Author(s): Jamie Strandboge
  • Date: 2010-03-30 12:55:34 UTC
  • mfrom: (0.1.17 sid)
  • Revision ID: james.westby@ubuntu.com-20100330125534-4c2ufc1rok24447l
Tags: 1.9.2-2ubuntu1
https://launchpad.net/bugs/521834
* Merge from Debian testing (LP: #521834). Based on work by Stefan Ebner.
  Remaining changes:
 - Remove python-xml from Suggests field, the package isn't anymore in
   sys.path.
 - Demote fckeditor from Recommends to Suggests; the code was previously
   embedded in moin, but it was also disabled, so there's no reason for us
   to pull this in by default currently. Note: This isn't necessary anymore
   but needs a MIR for fckeditor, so postpone dropping this change until
   lucid+1
* debian/rules:
  - Replace hardcoded python2.5 with python* and hardcore python2.6 for ln
* debian/control.in: drop versioned depends on cdbs

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MoinMoin/web/_fallback_cgi.py
 
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# -*- coding: iso-8859-1 -*-
 
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"""
 
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    MoinMoin - Fallback CGI WSGI interface
 
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    Provide a simple WSGI-to-CGI adapter in case flup is not available.
 
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    It is taken from http://www.python.org/dev/peps/pep-0333/.
 
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    @copyright: 2003-2006 Phillip J. Eby <pje at telecommunity.com>
 
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    @license: Public Domain
 
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"""
 
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import os, sys
 
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__all__ = ['WSGIServer']
 
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class WSGIServer(object):
 
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    def __init__(self, application):
 
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        self.application = application
 
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    def run(self):
 
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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') in ('on', '1'):
 
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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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        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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                sys.stdout.write('Status: %s\r\n' % status)
 
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                for header in response_headers:
 
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                    sys.stdout.write('%s: %s\r\n' % header)
 
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                sys.stdout.write('\r\n')
 
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            sys.stdout.write(data)
 
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            sys.stdout.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 = self.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()