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from mod_python import (util, Session, Cookie)
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"""An IVLE request object. This is presented to the IVLE apps as a way of
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interacting with the web server and the dispatcher.
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Request object attributes:
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String. The request method (eg. 'GET', 'POST', etc)
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String. The path portion of the URI.
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String. The path specified in the URL *not including* the
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application or the IVLE location prefix. eg. a URL of
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"/ivle/files/joe/myfiles" has a path of "joe/myfiles".
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String. Login name of the user who is currently logged in, or
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String. Hostname the server is running on.
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Table object representing headers sent by the client.
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headers_out (read, can be written to)
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Table object representing headers to be sent to the client.
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Bool. True if the request came for the "public host" as
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configured in conf.py. Note that public mode requests do not
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have an app (app is set to None).
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Int. Response status number. Use one of the status codes defined
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String. HTML page title. Used if write_html_head_foot is True, in
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the HTML title element text.
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List of strings. Write a list of URLs to CSS files here, and they
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will be incorporated as <link rel="stylesheet" type="text/css">
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elements in the head, if write_html_head_foot is True.
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URLs should be relative to the IVLE root; they will be fixed up
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List of strings. Write a list of URLs to JS files here, and they
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will be incorporated as <script type="text/javascript"> elements
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in the head, if write_html_head_foot is True.
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URLs should be relative to the IVLE root; they will be fixed up
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write_html_head_foot (write)
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Boolean. If True, dispatch assumes that this is an XHTML page, and
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will immediately write a full HTML head, open the body element,
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self.func_write_html_head = write_html_head
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self.headers_written = False
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# Determine if the browser used the public host name to make the
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# request (in which case we are in "public mode")
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if req.hostname == conf.public_host:
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self.publicmode = True
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self.publicmode = False
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# Inherit values for the input members
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self.method = req.method
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self.uri = req.uri
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# Split the given path into the app (top-level dir) and sub-path
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# (after first stripping away the root directory)
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path = common.util.unmake_path(req.uri)
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(self.app, self.path) = (common.util.split_path(path))
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self.hostname = req.hostname
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self.headers_in = req.headers_in
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self.headers_out = req.headers_out
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(self.app, self.path) = (
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common.util.split_path(common.util.unmake_path(req.uri)))
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# Default values for the output members
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self.status = Request.HTTP_OK
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self.status = Request.OK
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self.content_type = None # Use Apache's default
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self.location = None
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self.title = None # Will be set by dispatch before passing to app
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self.write_html_head_foot = False
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self.got_common_vars = False
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def __writeheaders(self):
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"""Writes out the HTTP and HTML headers before any real data is
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if not self.headers_written:
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self.__writeheaders()
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if isinstance(string, unicode):
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# Encode unicode strings as UTF-8
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# (Otherwise cannot handle being written to a bytestream)
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self.apache_req.write(string.encode('utf8'), flush)
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# 8-bit clean strings just get written directly.
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# This includes binary strings.
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self.apache_req.write(string, flush)
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self.apache_req.write(string, flush)
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"""Flushes the output buffer."""
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"""Reads at most len bytes directly from the client. (See mod_python
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Request.read)."""
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return self.apache_req.read()
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self.apache_req.read()
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return self.apache_req.read(len)
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self.apache_req.read(len)
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def throw_error(self, httpcode):
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"""Writes out an HTTP error of the specified code. Raises an exception
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mod_python.util.redirect(self.apache_req, location)
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def add_cookie(self, cookie, value=None, **attributes):
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"""Inserts a cookie into this request object's headers."""
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Cookie.add_cookie(self.apache_req, cookie)
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Cookie.add_cookie(self.apache_req, cookie, value, **attributes)
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def get_session(self):
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"""Returns a mod_python Session object for this request.
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Note that this is dependent on mod_python and may need to change
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interface if porting away from mod_python."""
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# Cache the session object and set the timeout to 24 hours.
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if not hasattr(self, 'session'):
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self.session = Session.FileSession(self.apache_req,
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timeout = 60 * 60 * 24)
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def get_fieldstorage(self):
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"""Returns a mod_python FieldStorage object for this request.
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Note that this is dependent on mod_python and may need to change
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interface if porting away from mod_python."""
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# Cache the fieldstorage object
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if not hasattr(self, 'fields'):
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self.fields = util.FieldStorage(self.apache_req)
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def get_cgi_environ(self):
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"""Returns the CGI environment emulation for this request. (Calls
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add_common_vars). The environment is returned as a mapping
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compatible with os.environ."""
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if not self.got_common_vars:
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self.apache_req.add_common_vars()
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self.got_common_vars = True
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return self.apache_req.subprocess_env