29
from mod_python import (util, Session, Cookie)
29
import mod_python.Session
30
import mod_python.Cookie
31
import mod_python.util
33
# This needs to be importable from outside Apache.
33
39
import ivle.database
34
import plugins.console # XXX: Relies on www/ being in the Python path.
40
from ivle.webapp.base.plugins import CookiePlugin
37
43
"""An IVLE request object. This is presented to the IVLE apps as a way of
74
80
String. Response "Location" header value. Used with HTTP redirect
77
String. HTML page title. Used if write_html_head_foot is True, in
78
the HTML title element text.
80
83
List of strings. Write a list of URLs to CSS files here, and they
81
84
will be incorporated as <link rel="stylesheet" type="text/css">
94
97
in the head, if write_html_head_foot is True.
95
98
This is the propper way to specify functions that need to run at
97
write_html_head_foot (write)
98
Boolean. If True, dispatch assumes that this is an XHTML page, and
99
will immediately write a full HTML head, open the body element,
100
and write heading contents to the page, before any bytes are
101
written. It will then write footer contents and close the body and
102
html elements at the end of execution.
104
This value should be set to true by all applications for all HTML
105
output (unless there is a good reason, eg. exec). The
106
applications should therefore output HTML content assuming that
107
it will be written inside the body tag. Do not write opening or
108
closing <html> or <body> tags.
111
102
# Special code for an OK response.
164
155
HTTP_INSUFFICIENT_STORAGE = 507
165
156
HTTP_NOT_EXTENDED = 510
167
def __init__(self, req, write_html_head):
168
"""Builds an IVLE request object from a mod_python request object.
169
This results in an object with all of the necessary methods and
158
def __init__(self, req, config):
159
"""Create an IVLE request from a mod_python one.
172
req: A mod_python request object.
173
write_html_head: Function which is called when writing the automatic
174
HTML header. Accepts a single argument, the IVLE request object.
161
@param req: A mod_python request.
162
@param config: An IVLE configuration.
177
165
# Methods are mostly wrappers around the Apache request object
178
166
self.apache_req = req
179
self.func_write_html_head = write_html_head
180
168
self.headers_written = False
182
170
# Determine if the browser used the public host name to make the
183
171
# request (in which case we are in "public mode")
184
if req.hostname == ivle.conf.public_host:
172
if req.hostname == config['urls']['public_host']:
185
173
self.publicmode = True
187
175
self.publicmode = False
191
179
self.uri = req.uri
192
180
# Split the given path into the app (top-level dir) and sub-path
193
181
# (after first stripping away the root directory)
194
path = ivle.util.unmake_path(req.uri)
182
path = self.unmake_path(req.uri)
195
183
(self.app, self.path) = (ivle.util.split_path(path))
197
185
self.hostname = req.hostname
201
189
# Open a database connection and transaction, keep it around for users
202
190
# of the Request object to use
203
self.store = ivle.database.get_store()
191
self.store = ivle.database.get_store(config)
205
193
# Default values for the output members
206
194
self.status = Request.HTTP_OK
207
195
self.content_type = None # Use Apache's default
208
196
self.location = None
209
self.title = None # Will be set by dispatch before passing to app
211
198
self.scripts = []
212
199
self.scripts_init = []
213
self.write_html_head_foot = False
214
200
# In some cases we don't want the template JS (such as the username
215
201
# and public FQDN) in the output HTML. In that case, set this to 0.
216
202
self.write_javascript_settings = True
224
210
"""Writes out the HTTP and HTML headers before any real data is
226
212
self.headers_written = True
228
# app is the App object for the chosen app
230
app = ivle.conf.apps.app_url[self.app]
234
# Write any final modifications to header content
235
if app and app.useconsole and self.user:
236
plugins.console.insert_scripts_styles(self.scripts, self.styles, \
239
214
# Prepare the HTTP and HTML headers before the first write is made
240
215
if self.content_type != None:
242
217
self.apache_req.status = self.status
243
218
if self.location != None:
244
219
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
221
def ensure_headers_written(self):
250
222
"""Writes out the HTTP and HTML headers if they haven't already been
270
242
def logout(self):
271
243
"""Log out the current user by destroying the session state.
272
244
Then redirect to the top-level IVLE page."""
273
# List of cookies that IVLE uses (to be removed at logout)
274
ivle_cookies = ["ivleforumcookie", "clipboard"]
276
245
if hasattr(self, 'session'):
277
246
self.session.invalidate()
278
247
self.session.delete()
279
248
# Invalidates all IVLE cookies
280
all_cookies = Cookie.get_cookies(self)
281
for cookie in all_cookies:
282
if cookie in ivle_cookies:
283
self.add_cookie(Cookie.Cookie(cookie,'',expires=1,path='/'))
284
self.throw_redirect(ivle.util.make_path(''))
249
all_cookies = mod_python.Cookie.get_cookies(self)
251
# Create cookies for plugins that might request them.
252
for plugin in self.config.plugin_index[CookiePlugin]:
253
for cookie in plugin.cookies:
254
self.add_cookie(mod_python.Cookie.Cookie(cookie, '',
255
expires=1, path='/'))
256
self.throw_redirect(self.make_path(''))
303
275
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
277
def throw_redirect(self, location):
316
278
"""Writes out an HTTP redirect to the specified URL. Raises an
317
279
exception which is caught by the dispatch or web server, so any
327
289
def add_cookie(self, cookie, value=None, **attributes):
328
290
"""Inserts a cookie into this request object's headers."""
329
291
if value is None:
330
Cookie.add_cookie(self.apache_req, cookie)
292
mod_python.Cookie.add_cookie(self.apache_req, cookie)
332
Cookie.add_cookie(self.apache_req, cookie, value, **attributes)
294
mod_python.Cookie.add_cookie(self.apache_req, cookie, value, **attributes)
296
def make_path(self, path):
297
"""Prepend the IVLE URL prefix to the given path.
299
This is used when generating URLs to send to the client.
301
This method is DEPRECATED. We no longer support use of a prefix.
303
return os.path.join(self.config['urls']['root'], path)
305
def unmake_path(self, path):
306
"""Strip the IVLE URL prefix from the given path, if present.
308
Also normalises the path.
310
This method is DEPRECATED. We no longer support use of a prefix.
312
path = os.path.normpath(path)
313
root = os.path.normpath(self.config['urls']['root'])
315
if path.startswith(root):
316
path = path[len(root):]
317
# Take out the slash as well
318
if len(path) > 0 and path[0] == os.sep:
334
323
def get_session(self):
335
324
"""Returns a mod_python Session object for this request.
336
325
Note that this is dependent on mod_python and may need to change
337
interface if porting away from mod_python."""
326
interface if porting away from mod_python.
328
IMPORTANT: Call unlock() on the session as soon as you are done with
329
it! If you don't, all other requests will block!
338
331
# Cache the session object and set the timeout to 24 hours.
339
332
if not hasattr(self, 'session'):
340
self.session = Session.FileSession(self.apache_req,
333
self.session = mod_python.Session.FileSession(self.apache_req,
341
334
timeout = 60 * 60 * 24)
342
335
return self.session
347
340
interface if porting away from mod_python."""
348
341
# Cache the fieldstorage object
349
342
if not hasattr(self, 'fields'):
350
self.fields = util.FieldStorage(self.apache_req)
343
self.fields = mod_python.util.FieldStorage(self.apache_req)
351
344
return self.fields
353
346
def get_cgi_environ(self):