Mercurial > hg
annotate mercurial/hgweb/wsgicgi.py @ 26610:f9f82c444ff7
filemerge: only copy to backup during premerge step
The premerge might leave the original file in an unclean state. Therefore it's
important to only copy the file in the beginning.
author | Siddharth Agarwal <sid0@fb.com> |
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date | Sun, 11 Oct 2015 20:04:40 -0700 |
parents | e8efcc8ff5c0 |
children | 37fcfe52c68c |
rev | line source |
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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 of the |
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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 from mercurial import util |
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13 from mercurial.hgweb import common |
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14 |
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15 def launch(application): |
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16 util.setbinary(sys.stdin) |
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17 util.setbinary(sys.stdout) |
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18 |
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19 environ = dict(os.environ.iteritems()) |
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20 environ.setdefault('PATH_INFO', '') |
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21 if environ.get('SERVER_SOFTWARE', '').startswith('Microsoft-IIS'): |
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22 # IIS includes script_name in PATH_INFO |
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23 scriptname = environ['SCRIPT_NAME'] |
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24 if environ['PATH_INFO'].startswith(scriptname): |
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25 environ['PATH_INFO'] = environ['PATH_INFO'][len(scriptname):] |
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26 |
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27 stdin = sys.stdin |
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28 if environ.get('HTTP_EXPECT', '').lower() == '100-continue': |
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29 stdin = common.continuereader(stdin, sys.stdout.write) |
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30 |
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31 environ['wsgi.input'] = stdin |
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32 environ['wsgi.errors'] = sys.stderr |
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33 environ['wsgi.version'] = (1, 0) |
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34 environ['wsgi.multithread'] = False |
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35 environ['wsgi.multiprocess'] = True |
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36 environ['wsgi.run_once'] = True |
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37 |
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38 if environ.get('HTTPS', 'off').lower() in ('on', '1', 'yes'): |
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39 environ['wsgi.url_scheme'] = 'https' |
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40 else: |
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41 environ['wsgi.url_scheme'] = 'http' |
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42 |
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43 headers_set = [] |
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44 headers_sent = [] |
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45 out = sys.stdout |
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46 |
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47 def write(data): |
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48 if not headers_set: |
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49 raise AssertionError("write() before start_response()") |
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50 |
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51 elif not headers_sent: |
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52 # Before the first output, send the stored headers |
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53 status, response_headers = headers_sent[:] = headers_set |
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54 out.write('Status: %s\r\n' % status) |
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55 for header in response_headers: |
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56 out.write('%s: %s\r\n' % header) |
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57 out.write('\r\n') |
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58 |
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59 out.write(data) |
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60 out.flush() |
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61 |
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62 def start_response(status, response_headers, exc_info=None): |
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63 if exc_info: |
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64 try: |
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65 if headers_sent: |
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66 # Re-raise original exception if headers sent |
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67 raise exc_info[0](exc_info[1], exc_info[2]) |
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68 finally: |
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69 exc_info = None # avoid dangling circular ref |
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70 elif headers_set: |
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71 raise AssertionError("Headers already set!") |
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72 |
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73 headers_set[:] = [status, response_headers] |
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74 return write |
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75 |
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76 content = application(environ, start_response) |
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77 try: |
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78 for chunk in content: |
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79 write(chunk) |
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80 if not headers_sent: |
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81 write('') # send headers now if body was empty |
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82 finally: |
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83 getattr(content, 'close', lambda : None)() |