33
33
# This needs to be importable from outside Apache.
38
39
import ivle.database
39
import plugins.console # XXX: Relies on www/ being in the Python path.
40
from ivle.webapp.base.plugins import CookiePlugin
42
43
"""An IVLE request object. This is presented to the IVLE apps as a way of
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
83
List of strings. Write a list of URLs to CSS files here, and they
86
84
will be incorporated as <link rel="stylesheet" type="text/css">
99
97
in the head, if write_html_head_foot is True.
100
98
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
102
# Special code for an OK response.
169
155
HTTP_INSUFFICIENT_STORAGE = 507
170
156
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
158
def __init__(self, req, config):
159
"""Create an IVLE request from a mod_python one.
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.
161
@param req: A mod_python request.
162
@param config: An IVLE configuration.
182
165
# Methods are mostly wrappers around the Apache request object
183
166
self.apache_req = req
184
self.func_write_html_head = write_html_head
185
168
self.headers_written = False
187
170
# Determine if the browser used the public host name to make the
188
171
# request (in which case we are in "public mode")
189
if req.hostname == ivle.conf.public_host:
172
if req.hostname == config['urls']['public_host']:
190
173
self.publicmode = True
192
175
self.publicmode = False
196
179
self.uri = req.uri
197
180
# Split the given path into the app (top-level dir) and sub-path
198
181
# (after first stripping away the root directory)
199
path = ivle.util.unmake_path(req.uri)
182
path = self.unmake_path(req.uri)
200
183
(self.app, self.path) = (ivle.util.split_path(path))
202
185
self.hostname = req.hostname
206
189
# Open a database connection and transaction, keep it around for users
207
190
# of the Request object to use
208
self.store = ivle.database.get_store()
191
self.store = ivle.database.get_store(config)
210
193
# Default values for the output members
211
194
self.status = Request.HTTP_OK
212
195
self.content_type = None # Use Apache's default
213
196
self.location = None
214
self.title = None # Will be set by dispatch before passing to app
216
198
self.scripts = []
217
199
self.scripts_init = []
218
self.write_html_head_foot = False
219
200
# In some cases we don't want the template JS (such as the username
220
201
# and public FQDN) in the output HTML. In that case, set this to 0.
221
202
self.write_javascript_settings = True
229
210
"""Writes out the HTTP and HTML headers before any real data is
231
212
self.headers_written = True
233
# app is the App object for the chosen app
235
app = ivle.conf.apps.app_url[self.app]
239
# Write any final modifications to header content
240
if app and app.useconsole and self.user:
241
plugins.console.insert_scripts_styles(self.scripts, self.styles, \
244
214
# Prepare the HTTP and HTML headers before the first write is made
245
215
if self.content_type != None:
247
217
self.apache_req.status = self.status
248
218
if self.location != None:
249
219
self.apache_req.headers_out['Location'] = self.location
250
if self.write_html_head_foot:
251
# Write the HTML header, pass "self" (request object)
252
self.func_write_html_head(self)
254
221
def ensure_headers_written(self):
255
222
"""Writes out the HTTP and HTML headers if they haven't already been
275
242
def logout(self):
276
243
"""Log out the current user by destroying the session state.
277
244
Then redirect to the top-level IVLE page."""
278
# List of cookies that IVLE uses (to be removed at logout)
279
ivle_cookies = ["ivleforumcookie", "clipboard"]
281
245
if hasattr(self, 'session'):
282
246
self.session.invalidate()
283
247
self.session.delete()
284
248
# Invalidates all IVLE cookies
285
249
all_cookies = mod_python.Cookie.get_cookies(self)
286
for cookie in all_cookies:
287
if cookie in ivle_cookies:
288
self.add_cookie(mod_python.Cookie.Cookie(cookie,'',expires=1,path='/'))
289
self.throw_redirect(ivle.util.make_path(''))
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(''))
308
275
return self.apache_req.read(len)
310
def throw_error(self, httpcode, message=None):
311
"""Writes out an HTTP error of the specified code. Raises an exception
312
which is caught by the dispatch or web server, so any code following
313
this call will not be executed.
315
httpcode: An HTTP response status code. Pass a constant from the
318
raise ivle.util.IVLEError(httpcode, message)
320
277
def throw_redirect(self, location):
321
278
"""Writes out an HTTP redirect to the specified URL. Raises an
322
279
exception which is caught by the dispatch or web server, so any
337
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:
339
323
def get_session(self):
340
324
"""Returns a mod_python Session object for this request.
341
325
Note that this is dependent on mod_python and may need to change
342
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!
343
331
# Cache the session object and set the timeout to 24 hours.
344
332
if not hasattr(self, 'session'):
345
333
self.session = mod_python.Session.FileSession(self.apache_req,