49
58
# Make the request object into an IVLE request which can be passed to apps
51
req = Request(req, html.write_html_head)
61
req = Request(req, html.write_html_head)
63
# Pass the apachereq to error reporter, since ivle req isn't created
65
handle_unknown_exception(apachereq, *sys.exc_info())
66
# Tell Apache not to generate its own errors as well
69
# Run the main handler, and catch all exceptions
71
return handler_(req, apachereq)
72
except mod_python.apache.SERVER_RETURN:
73
# An apache error. We discourage these, but they might still happen.
77
handle_unknown_exception(req, *sys.exc_info())
78
# Tell Apache not to generate its own errors as well
81
def handler_(req, apachereq):
83
Nested handler function. May raise exceptions. The top-level handler is
84
just used to catch exceptions.
85
Takes both an IVLE request and an Apache req.
87
# Hack? Try and get the user login early just in case we throw an error
88
# (most likely 404) to stop us seeing not logged in even when we are.
89
req.user = login.get_user_details(req)
53
91
# Check req.app to see if it is valid. 404 if not.
54
92
if req.app is not None and req.app not in conf.apps.app_url:
66
112
app = conf.apps.app_url[req.app]
68
114
# Check if app requires auth. If so, perform authentication and login.
115
# This will either return a User object, None, or perform a redirect
116
# which we will not catch here.
69
117
if app.requireauth:
70
req.username = login.login(req)
71
logged_in = req.username is not None
118
req.user = login.login(req)
119
logged_in = req.user is not None
73
req.username = login.get_username(req)
121
req.user = login.get_user_details(req)
125
# Keep the user's session alive by writing to the session object.
126
# req.get_session().save()
127
# Well, it's a fine idea, but it creates considerable grief in the
128
# concurrent update department, so instead, we'll just make the
129
# sessions not time out.
77
131
# If user did not specify an app, HTTP redirect to default app and
79
133
if req.app is None:
110
168
session = req.get_session()
111
169
session.invalidate()
171
req.add_cookie(forumutil.invalidated_forum_cookie())
113
172
req.throw_redirect(util.make_path(''))
174
def handle_unknown_exception(req, exc_type, exc_value, exc_traceback):
176
Given an exception that has just been thrown from IVLE, print its details
178
This is a full handler. It assumes nothing has been written, and writes a
180
req: May be EITHER an IVLE req or an Apache req.
181
IVLE reqs may have the HTML head/foot written (on a 400 error), but
182
the handler code may pass an apache req if an exception occurs before
183
the IVLE request is created.
185
req.content_type = "text/html"
186
logfile = os.path.join(conf.conf.log_path, 'ivle_error.log')
188
# For some reason, some versions of mod_python have "_server" instead of
189
# "main_server". So we check for both.
191
admin_email = apache.main_server.server_admin
192
except AttributeError:
194
admin_email = apache._server.server_admin
195
except AttributeError:
198
httpcode = exc_value.httpcode
199
req.status = httpcode
200
except AttributeError:
202
req.status = apache.HTTP_INTERNAL_SERVER_ERROR
204
login = req.user.login
205
except AttributeError:
210
logging.basicConfig(level=logging.INFO,
211
format='%(asctime)s %(levelname)s: ' +
212
'(HTTP: ' + str(req.status) +
213
', Ref: ' + str(login) + '@' +
214
str(socket.gethostname()) + str(req.uri) +
220
logging.debug('Logging Unhandled Exception')
222
# We handle 3 types of error.
223
# IVLEErrors with 4xx response codes (client error).
224
# IVLEErrors with 5xx response codes (handled server error).
225
# Other exceptions (unhandled server error).
226
# IVLEErrors should not have other response codes than 4xx or 5xx
227
# (eg. throw_redirect should have been used for 3xx codes).
228
# Therefore, that is treated as an unhandled error.
230
if (exc_type == util.IVLEError and httpcode >= 400
231
and httpcode <= 499):
232
# IVLEErrors with 4xx response codes are client errors.
233
# Therefore, these have a "nice" response (we even coat it in the IVLE
236
req.write_html_head_foot = True
237
req.write('<div id="ivle_padding">\n')
239
codename, msg = req.get_http_codename(httpcode)
240
except AttributeError:
241
codename, msg = None, None
242
# Override the default message with the supplied one,
244
if exc_value.message is not None:
245
msg = exc_value.message
246
if codename is not None:
247
req.write("<h1>Error: %s</h1>\n" % cgi.escape(codename))
249
req.write("<h1>Error</h1>\n")
251
req.write("<p>%s</p>\n" % cgi.escape(msg))
253
req.write("<p>An unknown error occured.</p>\n")
256
logging.info(str(msg))
258
req.write("<p>(HTTP error code %d)</p>\n" % httpcode)
260
req.write("<p>Warning: Could not open Error Log: '%s'</p>\n"
261
%cgi.escape(logfile))
262
req.write('</div>\n')
264
# A "bad" error message. We shouldn't get here unless IVLE
265
# misbehaves (which is currently very easy, if things aren't set up
267
# Write the traceback.
268
# If this is a non-4xx IVLEError, get the message and httpcode and
269
# make the error message a bit nicer (but still include the
271
# We also need to special-case IVLEJailError, as we can get another
272
# almost-exception out of it.
274
codename, msg = None, None
276
if exc_type is util.IVLEJailError:
277
msg = exc_value.type_str + ": " + exc_value.message
278
tb = 'Exception information extracted from IVLEJailError:\n'
279
tb += urllib.unquote(exc_value.info)
282
codename, msg = req.get_http_codename(httpcode)
283
except AttributeError:
285
# Override the default message with the supplied one,
287
if hasattr(exc_value, 'message') and exc_value.message is not None:
288
msg = exc_value.message
289
# Prepend the exception type
290
if exc_type != util.IVLEError:
291
msg = exc_type.__name__ + ": " + msg
293
tb = ''.join(traceback.format_exception(exc_type, exc_value,
297
logging.error('%s\n%s'%(str(msg), tb))
300
<head><title>IVLE Internal Server Error</title></head>
302
<h1>IVLE Internal Server Error""")
303
if (codename is not None
304
and httpcode != apache.HTTP_INTERNAL_SERVER_ERROR):
305
req.write(": %s" % cgi.escape(codename))
307
<p>An error has occured which is the fault of the IVLE developers or
311
req.write("<p>%s</p>\n" % cgi.escape(msg))
312
if httpcode is not None:
313
req.write("<p>(HTTP error code %d)</p>\n" % httpcode)
315
<p>Please report this to <a href="mailto:%s">%s</a> (the system
316
administrator). Include the following information:</p>
317
""" % (cgi.escape(admin_email), cgi.escape(admin_email)))
319
req.write("<pre>\n%s\n</pre>\n"%cgi.escape(tb))
321
req.write("<p>Warning: Could not open Error Log: '%s'</p>\n"
322
%cgi.escape(logfile))