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annotate roundup/cgi/wsgi_handler.py @ 5729:9ea2ce9d10cf

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A few internet references report that etags for the same underlying resource but with different representation (xml, json ...) should have different etags. That is currently not the case. Added code to allow incorporation of representation info into the etag. By default the representation is "json", but future patches can pass the representation down and modify flow to match requested representation.
author John Rouillard <rouilj@ieee.org>
date Sat, 25 May 2019 14:23:16 -0400
parents 5579fa034f9e
children 1a835db41674
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1 # WSGI interface for Roundup Issue Tracker
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2 #
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3 # This module is free software, you may redistribute it
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4 # and/or modify under the same terms as Python.
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5 #
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6
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7 import os
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8 import cgi
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9 import weakref
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10
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11 import roundup.instance
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12 from roundup.cgi import TranslationService
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13 from roundup.anypy import http_
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14 from roundup.anypy.strings import s2b, bs2b
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15 BaseHTTPRequestHandler = http_.server.BaseHTTPRequestHandler
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16 DEFAULT_ERROR_MESSAGE = http_.server.DEFAULT_ERROR_MESSAGE
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17
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18
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19 class Writer(object):
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20 '''Perform a start_response if need be when we start writing.'''
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21 def __init__(self, request):
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22 self.request = request #weakref.ref(request)
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23 def write(self, data):
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24 f = self.request.get_wfile()
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25 self.write = lambda data: f(bs2b(data))
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26 return self.write(data)
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27
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28 class RequestDispatcher(object):
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29 def __init__(self, home, debug=False, timing=False, lang=None):
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30 assert os.path.isdir(home), '%r is not a directory'%(home,)
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31 self.home = home
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32 self.debug = debug
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33 self.timing = timing
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34 if lang:
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35 self.translator = TranslationService.get_translation(lang,
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36 tracker_home=home)
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37 else:
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38 self.translator = None
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39
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40 def __call__(self, environ, start_response):
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41 """Initialize with `apache.Request` object"""
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42 self.environ = environ
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43 request = RequestDispatcher(self.home, self.debug, self.timing)
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44 request.__start_response = start_response
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45
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46 request.wfile = Writer(request)
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47 request.__wfile = None
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49 if environ ['REQUEST_METHOD'] == 'OPTIONS':
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50 code = 501
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51 message, explain = BaseHTTPRequestHandler.responses[code]
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52 request.start_response([('Content-Type', 'text/html'),
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53 ('Connection', 'close')], code)
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54 request.wfile.write(s2b(DEFAULT_ERROR_MESSAGE % locals()))
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55 return []
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56
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57 tracker = roundup.instance.open(self.home, not self.debug)
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58
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59 # need to strip the leading '/'
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60 environ["PATH_INFO"] = environ["PATH_INFO"][1:]
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61 if request.timing:
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62 environ["CGI_SHOW_TIMING"] = request.timing
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63
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64 form = cgi.FieldStorage(fp=environ['wsgi.input'], environ=environ)
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65
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66 client = tracker.Client(tracker, request, environ, form,
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67 request.translator)
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68 try:
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69 client.main()
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70 except roundup.cgi.client.NotFound:
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71 request.start_response([('Content-Type', 'text/html')], 404)
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72 request.wfile.write(s2b('Not found: %s'%cgi.escape(client.path)))
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73
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74 # all body data has been written using wfile
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75 return []
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76
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77 def start_response(self, headers, response_code):
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78 """Set HTTP response code"""
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79 message, explain = BaseHTTPRequestHandler.responses[response_code]
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80 self.__wfile = self.__start_response('%d %s'%(response_code,
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81 message), headers)
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82
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83 def get_wfile(self):
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84 if self.__wfile is None:
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85 raise ValueError('start_response() not called')
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86 return self.__wfile
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87
Roundup Issue Tracker: http://roundup-tracker.org/