79
80
String. Response "Location" header value. Used with HTTP redirect
82
String. HTML page title. Used if write_html_head_foot is True, in
83
the HTML title element text.
85
List of strings. Write a list of URLs to CSS files here, and they
86
will be incorporated as <link rel="stylesheet" type="text/css">
87
elements in the head, if write_html_head_foot is True.
88
URLs should be relative to the IVLE root; they will be fixed up
91
List of strings. Write a list of URLs to JS files here, and they
92
will be incorporated as <script type="text/javascript"> elements
93
in the head, if write_html_head_foot is True.
94
URLs should be relative to the IVLE root; they will be fixed up
97
List of strings. Write a list of JS function names, and they
98
will be added as window.addListener('load', ..., false); calls
99
in the head, if write_html_head_foot is True.
100
This is the propper way to specify functions that need to run at
102
write_html_head_foot (write)
103
Boolean. If True, dispatch assumes that this is an XHTML page, and
104
will immediately write a full HTML head, open the body element,
105
and write heading contents to the page, before any bytes are
106
written. It will then write footer contents and close the body and
107
html elements at the end of execution.
109
This value should be set to true by all applications for all HTML
110
output (unless there is a good reason, eg. exec). The
111
applications should therefore output HTML content assuming that
112
it will be written inside the body tag. Do not write opening or
113
closing <html> or <body> tags.
116
84
# Special code for an OK response.
121
89
# HTTP status codes
124
HTTP_SWITCHING_PROTOCOLS = 101
125
HTTP_PROCESSING = 102
129
HTTP_NON_AUTHORITATIVE = 203
130
HTTP_NO_CONTENT = 204
131
HTTP_RESET_CONTENT = 205
132
HTTP_PARTIAL_CONTENT = 206
133
HTTP_MULTI_STATUS = 207
134
HTTP_MULTIPLE_CHOICES = 300
135
HTTP_MOVED_PERMANENTLY = 301
136
92
HTTP_MOVED_TEMPORARILY = 302
138
HTTP_NOT_MODIFIED = 304
140
HTTP_TEMPORARY_REDIRECT = 307
141
HTTP_BAD_REQUEST = 400
142
HTTP_UNAUTHORIZED = 401
143
HTTP_PAYMENT_REQUIRED = 402
144
93
HTTP_FORBIDDEN = 403
145
94
HTTP_NOT_FOUND = 404
146
HTTP_METHOD_NOT_ALLOWED = 405
147
HTTP_NOT_ACCEPTABLE = 406
148
HTTP_PROXY_AUTHENTICATION_REQUIRED= 407
149
HTTP_REQUEST_TIME_OUT = 408
152
HTTP_LENGTH_REQUIRED = 411
153
HTTP_PRECONDITION_FAILED = 412
154
HTTP_REQUEST_ENTITY_TOO_LARGE = 413
155
HTTP_REQUEST_URI_TOO_LARGE = 414
156
HTTP_UNSUPPORTED_MEDIA_TYPE = 415
157
HTTP_RANGE_NOT_SATISFIABLE = 416
158
HTTP_EXPECTATION_FAILED = 417
159
HTTP_UNPROCESSABLE_ENTITY = 422
161
HTTP_FAILED_DEPENDENCY = 424
162
95
HTTP_INTERNAL_SERVER_ERROR = 500
163
HTTP_NOT_IMPLEMENTED = 501
164
HTTP_BAD_GATEWAY = 502
165
HTTP_SERVICE_UNAVAILABLE = 503
166
HTTP_GATEWAY_TIME_OUT = 504
167
HTTP_VERSION_NOT_SUPPORTED = 505
168
HTTP_VARIANT_ALSO_VARIES = 506
169
HTTP_INSUFFICIENT_STORAGE = 507
170
HTTP_NOT_EXTENDED = 510
172
def __init__(self, req, write_html_head):
173
"""Builds an IVLE request object from a mod_python request object.
174
This results in an object with all of the necessary methods and
177
req: A mod_python request object.
178
write_html_head: Function which is called when writing the automatic
179
HTML header. Accepts a single argument, the IVLE request object.
97
def __init__(self, req, config):
98
"""Create an IVLE request from a mod_python one.
100
@param req: A mod_python request.
101
@param config: An IVLE configuration.
182
104
# Methods are mostly wrappers around the Apache request object
183
105
self.apache_req = req
184
self.func_write_html_head = write_html_head
185
107
self.headers_written = False
187
109
# Determine if the browser used the public host name to make the
188
110
# request (in which case we are in "public mode")
189
if req.hostname == ivle.conf.public_host:
111
if req.hostname == config['urls']['public_host']:
190
112
self.publicmode = True
192
114
self.publicmode = False
196
118
self.uri = req.uri
197
119
# Split the given path into the app (top-level dir) and sub-path
198
120
# (after first stripping away the root directory)
199
path = ivle.util.unmake_path(req.uri)
200
(self.app, self.path) = (ivle.util.split_path(path))
121
(self.app, self.path) = (ivle.util.split_path(req.uri))
202
123
self.hostname = req.hostname
203
124
self.headers_in = req.headers_in
206
127
# Open a database connection and transaction, keep it around for users
207
128
# of the Request object to use
208
self.store = ivle.database.get_store()
129
self.store = ivle.database.get_store(config)
210
131
# Default values for the output members
211
132
self.status = Request.HTTP_OK
212
133
self.content_type = None # Use Apache's default
213
134
self.location = None
214
self.title = None # Will be set by dispatch before passing to app
217
self.scripts_init = []
218
self.write_html_head_foot = False
219
135
# In some cases we don't want the template JS (such as the username
220
136
# and public FQDN) in the output HTML. In that case, set this to 0.
221
137
self.write_javascript_settings = True
229
145
"""Writes out the HTTP and HTML headers before any real data is
231
147
self.headers_written = True
233
# app is the App object for the chosen app
235
app = ivle.conf.apps.app_url[self.app]
239
149
# Prepare the HTTP and HTML headers before the first write is made
240
150
if self.content_type != None:
242
152
self.apache_req.status = self.status
243
153
if self.location != None:
244
154
self.apache_req.headers_out['Location'] = self.location
245
if self.write_html_head_foot:
246
# Write the HTML header, pass "self" (request object)
247
self.func_write_html_head(self)
249
156
def ensure_headers_written(self):
250
157
"""Writes out the HTTP and HTML headers if they haven't already been
277
184
all_cookies = mod_python.Cookie.get_cookies(self)
279
186
# Create cookies for plugins that might request them.
280
for plugin in self.plugin_index[CookiePlugin]:
187
for plugin in self.config.plugin_index[CookiePlugin]:
281
188
for cookie in plugin.cookies:
282
189
self.add_cookie(mod_python.Cookie.Cookie(cookie, '',
283
190
expires=1, path='/'))
284
self.throw_redirect(ivle.util.make_path(''))
191
self.throw_redirect(self.make_path(''))
303
210
return self.apache_req.read(len)
305
def throw_error(self, httpcode, message=None):
306
"""Writes out an HTTP error of the specified code. Raises an exception
307
which is caught by the dispatch or web server, so any code following
308
this call will not be executed.
310
httpcode: An HTTP response status code. Pass a constant from the
313
raise ivle.util.IVLEError(httpcode, message)
315
212
def throw_redirect(self, location):
316
213
"""Writes out an HTTP redirect to the specified URL. Raises an
317
214
exception which is caught by the dispatch or web server, so any
332
229
mod_python.Cookie.add_cookie(self.apache_req, cookie, value, **attributes)
231
def make_path(self, path):
232
"""Prepend the IVLE URL prefix to the given path.
234
This is used when generating URLs to send to the client.
236
This method is DEPRECATED. We no longer support use of a prefix.
238
return os.path.join(self.config['urls']['root'], path)
334
240
def get_session(self):
335
241
"""Returns a mod_python Session object for this request.
336
242
Note that this is dependent on mod_python and may need to change
337
interface if porting away from mod_python."""
243
interface if porting away from mod_python.
245
IMPORTANT: Call unlock() on the session as soon as you are done with
246
it! If you don't, all other requests will block!
338
248
# Cache the session object and set the timeout to 24 hours.
339
249
if not hasattr(self, 'session'):
340
250
self.session = mod_python.Session.FileSession(self.apache_req,
359
269
self.got_common_vars = True
360
270
return self.apache_req.subprocess_env
363
def get_http_codename(code):
364
"""Given a HTTP error code int, returns a (name, description)
365
pair, suitable for displaying to the user.
366
May return (None,None) if code is unknown.
367
Only lists common 4xx and 5xx codes (since this is just used
368
to display throw_error error messages).
371
return http_codenames[code]
375
# Human strings for HTTP response codes
377
Request.HTTP_BAD_REQUEST:
379
"Your browser sent a request IVLE did not understand."),
380
Request.HTTP_UNAUTHORIZED:
382
"You are not allowed to view this part of IVLE."),
383
Request.HTTP_FORBIDDEN:
385
"You are not allowed to view this part of IVLE."),
386
Request.HTTP_NOT_FOUND:
388
"The application or file you requested does not exist."),
389
Request.HTTP_METHOD_NOT_ALLOWED:
390
("Method Not Allowed",
391
"Your browser is interacting with IVLE in the wrong way."
392
"This is probably a bug in IVLE. "
393
"Please report it to the administrators."),
394
Request.HTTP_INTERNAL_SERVER_ERROR:
395
("Internal Server Error",
396
"An unknown error occured in IVLE."),
397
Request.HTTP_NOT_IMPLEMENTED:
399
"The application or file you requested has not been implemented "
401
Request.HTTP_SERVICE_UNAVAILABLE:
402
("Service Unavailable",
403
"IVLE is currently experiencing technical difficulties. "
404
"Please try again later."),
added
removed
ivle/dispatch/request.py
