1
# IVLE - Informatics Virtual Learning Environment
2
# Copyright (C) 2007-2008 The University of Melbourne
4
# This program is free software; you can redistribute it and/or modify
5
# it under the terms of the GNU General Public License as published by
6
# the Free Software Foundation; either version 2 of the License, or
7
# (at your option) any later version.
9
# This program is distributed in the hope that it will be useful,
10
# but WITHOUT ANY WARRANTY; without even the implied warranty of
11
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12
# GNU General Public License for more details.
14
# You should have received a copy of the GNU General Public License
15
# along with this program; if not, write to the Free Software
16
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
# Module: dispatch.request
22
# Builds an IVLE request object from a mod_python request object.
23
# See design notes/apps/dispatch.txt for a full specification of this request
29
"""An IVLE request object. This is presented to the IVLE apps as a way of
30
interacting with the web server and the dispatcher.
32
Request object attributes:
34
String. The path portion of the URI.
36
String. Name of the application specified in the URL, or None.
38
String. The path specified in the URL *not including* the
39
application or the IVLE location prefix. eg. a URL of
40
"/ivle/files/joe/myfiles" has a path of "joe/myfiles".
43
Int. Response status number. Use one of the status codes defined
46
String. The Content-Type (mime type) header value.
48
String. Response "Location" header value. Used with HTTP redirect
51
String. HTML page title. Used if write_html_head_foot is True, in
52
the HTML title element text.
53
write_html_head_foot (write)
54
Boolean. If True, dispatch assumes that this is an XHTML page, and
55
will immediately write a full HTML head, open the body element,
56
and write heading contents to the page, before any bytes are
57
written. It will then write footer contents and close the body and
58
html elements at the end of execution.
60
This value should be set to true by all applications for all HTML
61
output (unless there is a good reason, eg. exec). The
62
applications should therefore output HTML content assuming that
63
it will be written inside the body tag. Do not write opening or
64
closing <html> or <body> tags.
67
# Special code for an OK response.
68
# Do not use HTTP_OK; for some reason Apache produces an "OK" error
69
# message if you do that.
75
HTTP_SWITCHING_PROTOCOLS = 101
80
HTTP_NON_AUTHORITATIVE = 203
82
HTTP_RESET_CONTENT = 205
83
HTTP_PARTIAL_CONTENT = 206
84
HTTP_MULTI_STATUS = 207
85
HTTP_MULTIPLE_CHOICES = 300
86
HTTP_MOVED_PERMANENTLY = 301
87
HTTP_MOVED_TEMPORARILY = 302
89
HTTP_NOT_MODIFIED = 304
91
HTTP_TEMPORARY_REDIRECT = 307
92
HTTP_BAD_REQUEST = 400
93
HTTP_UNAUTHORIZED = 401
94
HTTP_PAYMENT_REQUIRED = 402
97
HTTP_METHOD_NOT_ALLOWED = 405
98
HTTP_NOT_ACCEPTABLE = 406
99
HTTP_PROXY_AUTHENTICATION_REQUIRED= 407
100
HTTP_REQUEST_TIME_OUT = 408
103
HTTP_LENGTH_REQUIRED = 411
104
HTTP_PRECONDITION_FAILED = 412
105
HTTP_REQUEST_ENTITY_TOO_LARGE = 413
106
HTTP_REQUEST_URI_TOO_LARGE = 414
107
HTTP_UNSUPPORTED_MEDIA_TYPE = 415
108
HTTP_RANGE_NOT_SATISFIABLE = 416
109
HTTP_EXPECTATION_FAILED = 417
110
HTTP_UNPROCESSABLE_ENTITY = 422
112
HTTP_FAILED_DEPENDENCY = 424
113
HTTP_INTERNAL_SERVER_ERROR = 500
114
HTTP_NOT_IMPLEMENTED = 501
115
HTTP_BAD_GATEWAY = 502
116
HTTP_SERVICE_UNAVAILABLE = 503
117
HTTP_GATEWAY_TIME_OUT = 504
118
HTTP_VERSION_NOT_SUPPORTED = 505
119
HTTP_VARIANT_ALSO_VARIES = 506
120
HTTP_INSUFFICIENT_STORAGE = 507
121
HTTP_NOT_EXTENDED = 510
123
def __init__(self, req, write_html_head):
124
"""Builds an IVLE request object from a mod_python request object.
125
This results in an object with all of the necessary methods and
128
req: A mod_python request object.
129
write_html_head: Function which is called when writing the automatic
130
HTML header. Accepts a single argument, the IVLE request object.
133
# Methods are mostly wrappers around the Apache request object
134
self.apache_req = req
135
self.func_write_html_head = write_html_head
136
self.headers_written = False
138
# Inherit values for the input members
140
# Split the given path into the app (top-level dir) and sub-path
141
# (after first stripping away the root directory)
142
(self.app, self.path) = (
143
common.util.split_path(common.util.unmake_path(req.uri)))
145
# Default values for the output members
146
self.status = Request.OK
147
self.content_type = None # Use Apache's default
149
self.title = None # Will be set by dispatch before passing to app
150
self.write_html_head_foot = False
152
def write(self, string, flush=1):
153
"""Writes string directly to the client, then flushes the buffer,
154
unless flush is 0."""
156
if not self.headers_written:
157
self.headers_written = True
158
# Prepare the HTTP and HTML headers before the first write is made
159
if self.content_type != None:
160
self.apache_req.content_type = self.content_type
161
self.apache_req.status = self.status
162
if self.location != None:
163
self.apache_req.headers_out['Location'] = self.location
164
if self.write_html_head_foot:
165
# Write the HTML header, pass "self" (request object)
166
self.func_write_html_head(self)
168
self.apache_req.write(string, flush)
171
"""Flushes the output buffer."""
172
self.apache_req.flush()
added
removed
src/dispatch/request.py
