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annotate mercurial/hgweb/wsgicgi.py @ 4072:e916bc0dfdd6

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transplant: remote bundle source was not closed before deleting the fetched bundle. It fails under win32 because "normal" opened files cannot be removed.
author Patrick Mezard <pmezard@gmail.com>
date Sun, 11 Feb 2007 18:37:23 +0100
parents eb0b4a2d70a9
children 5a89c61c189c
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1 # hgweb/wsgicgi.py - CGI->WSGI translator
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2 #
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3 # Copyright 2006 Eric Hopper <hopper@omnifarious.org>
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4 #
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5 # This software may be used and distributed according to the terms
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6 # of the GNU General Public License, incorporated herein by reference.
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7 #
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8 # This was originally copied from the public domain code at
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9 # http://www.python.org/dev/peps/pep-0333/#the-server-gateway-side
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10
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11 import os, sys
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12
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13 def launch(application):
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14
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15 environ = dict(os.environ.items())
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16 environ['wsgi.input'] = sys.stdin
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17 environ['wsgi.errors'] = sys.stderr
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18 environ['wsgi.version'] = (1, 0)
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19 environ['wsgi.multithread'] = False
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20 environ['wsgi.multiprocess'] = True
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21 environ['wsgi.run_once'] = True
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22
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23 if environ.get('HTTPS','off') in ('on','1'):
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24 environ['wsgi.url_scheme'] = 'https'
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25 else:
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26 environ['wsgi.url_scheme'] = 'http'
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27
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28 headers_set = []
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29 headers_sent = []
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30 out = sys.stdout
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31
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32 def write(data):
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33 if not headers_set:
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34 raise AssertionError("write() before start_response()")
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35
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36 elif not headers_sent:
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37 # Before the first output, send the stored headers
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38 status, response_headers = headers_sent[:] = headers_set
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39 out.write('Status: %s\r\n' % status)
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40 for header in response_headers:
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41 out.write('%s: %s\r\n' % header)
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42 out.write('\r\n')
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43
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44 out.write(data)
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45 out.flush()
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46
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47 def start_response(status, response_headers, exc_info=None):
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48 if exc_info:
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49 try:
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50 if headers_sent:
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51 # Re-raise original exception if headers sent
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52 raise exc_info[0], exc_info[1], exc_info[2]
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53 finally:
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54 exc_info = None # avoid dangling circular ref
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55 elif headers_set:
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56 raise AssertionError("Headers already set!")
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57
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58 headers_set[:] = [status, response_headers]
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59 return write
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60
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61 result = application(environ, start_response)
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62 try:
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63 for data in result:
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64 if data: # don't send headers until body appears
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65 write(data)
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66 if not headers_sent:
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67 write('') # send headers now if body was empty
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68 finally:
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69 if hasattr(result,'close'):
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70 result.close()