Mercurial > hg > mercurial-crew-with-dirclash
annotate mercurial/hgweb/wsgicgi.py @ 3838:dec4eba7ccad
Use util.always instead of creating a new lambda function in show_changeset
and simplify the expression.
author | Thomas Arendsen Hein <thomas@intevation.de> |
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date | Sat, 09 Dec 2006 09:30:29 +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() |