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from mod_python import (util, Session, Cookie)
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from mod_python import (util, Session)
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import plugins.console
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"""An IVLE request object. This is presented to the IVLE apps as a way of
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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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User object. Details of the user who is currently logged in, or
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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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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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to be site-relative.
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List of strings. Write a list of JS function names, and they
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will be added as window.addListener('load', ..., false); calls
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in the head, if write_html_head_foot is True.
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This is the propper way to specify functions that need to run at
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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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# 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.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.title = None # Will be set by dispatch before passing to app
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self.scripts = []
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self.scripts_init = []
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self.write_html_head_foot = False
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# In some cases we don't want the template JS (such as the username
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# and public FQDN) in the output HTML. In that case, set this to 0.
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self.write_javascript_settings = True
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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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self.headers_written = True
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# app is the App object for the chosen app
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app = conf.apps.app_url[self.app]
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# Write any final modifications to header content
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if app and app.useconsole and self.user:
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plugins.console.insert_scripts_styles(self.scripts, self.styles, \
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# Prepare the HTTP and HTML headers before the first write is made
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if self.content_type != None:
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self.apache_req.content_type = self.content_type
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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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return self.apache_req.read(len)
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def throw_error(self, httpcode, message=None):
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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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which is caught by the dispatch or web server, so any code following
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this call will not be executed.
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httpcode: An HTTP response status code. Pass a constant from the
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raise common.util.IVLEError(httpcode, message)
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raise mod_python.apache.SERVER_RETURN, httpcode
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def throw_redirect(self, location):
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"""Writes out an HTTP redirect to the specified URL. Raises an
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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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# Cache the session object
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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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self.session = Session.Session(self.apache_req)
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return self.session
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def get_fieldstorage(self):
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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
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def get_http_codename(code):
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"""Given a HTTP error code int, returns a (name, description)
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pair, suitable for displaying to the user.
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May return (None,None) if code is unknown.
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Only lists common 4xx and 5xx codes (since this is just used
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to display throw_error error messages).
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return http_codenames[code]
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# Human strings for HTTP response codes
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Request.HTTP_BAD_REQUEST:
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"Your browser sent a request IVLE did not understand."),
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Request.HTTP_UNAUTHORIZED:
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"You are not allowed to view this part of IVLE."),
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Request.HTTP_FORBIDDEN:
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"You are not allowed to view this part of IVLE."),
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Request.HTTP_NOT_FOUND:
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"The application or file you requested does not exist."),
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Request.HTTP_METHOD_NOT_ALLOWED:
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("Method Not Allowed",
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"Your browser is interacting with IVLE in the wrong way."
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"This is probably a bug in IVLE. "
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"Please report it to the administrators."),
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Request.HTTP_INTERNAL_SERVER_ERROR:
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("Internal Server Error",
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"An unknown error occured in IVLE."),
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Request.HTTP_NOT_IMPLEMENTED:
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"The application or file you requested has not been implemented "
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Request.HTTP_SERVICE_UNAVAILABLE:
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("Service Unavailable",
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"IVLE is currently experiencing technical difficulties. "
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"Please try again later."),