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- Committer: William Grant
- Date: 2009-02-18 05:22:12 UTC
- mto: (1100.1.8 new-ui) (1099.1.227 exercise-ui)
- mto: This revision was merged to the branch mainline in revision 1100.
- Revision ID: grantw@unimelb.edu.au-20090218052212-81xa7ceq3hbxhxhz
Drop the 4xx-series exception handling ability from
ivle.dispatch.handle_unknown_exception(). Nothing raises anything but a 5xx
IVLEError now.
ivle.dispatch.handle_unknown_exception(). Nothing raises anything but a 5xx
IVLEError now.
- files modified:
- ivle/dispatch/__init__.py
added
removed
ivle/dispatch/__init__.py
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This is a full handler. It assumes nothing has been written, and writes a
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complete HTML page.
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req: May be EITHER an IVLE req or an Apache req.
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IVLE reqs may have the HTML head/foot written (on a 400 error), but
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the handler code may pass an apache req if an exception occurs before
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The handler code may pass an apache req if an exception occurs before
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the IVLE request is created.
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"""
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req.content_type = "text/html"
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logfail = True
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logging.debug('Logging Unhandled Exception')
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# We handle 3 types of error.
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# IVLEErrors with 4xx response codes (client error).
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# IVLEErrors with 5xx response codes (handled server error).
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# Other exceptions (unhandled server error).
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# IVLEErrors should not have other response codes than 4xx or 5xx
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# (eg. throw_redirect should have been used for 3xx codes).
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# Therefore, that is treated as an unhandled error.
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if (exc_type == util.IVLEError and httpcode >= 400
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and httpcode <= 499):
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# IVLEErrors with 4xx response codes are client errors.
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# Therefore, these have a "nice" response (we even coat it in the IVLE
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# HTML wrappers).
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req.write_html_head_foot = True
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req.write_javascript_settings = False
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req.write('<div id="ivle_padding">\n')
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# A "bad" error message. We shouldn't get here unless IVLE
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# misbehaves (which is currently very easy, if things aren't set up
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# correctly).
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# Write the traceback.
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# If this is a non-4xx IVLEError, get the message and httpcode and
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# make the error message a bit nicer (but still include the
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# traceback).
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# We also need to special-case IVLEJailError, as we can get another
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# almost-exception out of it.
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codename, msg = None, None
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if exc_type is util.IVLEJailError:
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msg = exc_value.type_str + ": " + exc_value.message
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tb = 'Exception information extracted from IVLEJailError:\n'
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tb += urllib.unquote(exc_value.info)
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else:
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try:
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codename, msg = req.get_http_codename(httpcode)
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except AttributeError:
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codename, msg = None, None
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pass
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# Override the default message with the supplied one,
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# if available.
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if exc_value.message is not None:
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if hasattr(exc_value, 'message') and exc_value.message is not None:
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msg = exc_value.message
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if codename is not None:
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req.write("<h1>Error: %s</h1>\n" % cgi.escape(codename))
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else:
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req.write("<h1>Error</h1>\n")
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if msg is not None:
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req.write("<p>%s</p>\n" % cgi.escape(msg))
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else:
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req.write("<p>An unknown error occured.</p>\n")
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# Logging
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logging.info(str(msg))
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req.write("<p>(HTTP error code %d)</p>\n" % httpcode)
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if logfail:
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req.write("<p>Warning: Could not open Error Log: '%s'</p>\n"
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%cgi.escape(logfile))
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req.write('</div>\n')
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html.write_html_foot(req)
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else:
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# A "bad" error message. We shouldn't get here unless IVLE
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# misbehaves (which is currently very easy, if things aren't set up
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# correctly).
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# Write the traceback.
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# If this is a non-4xx IVLEError, get the message and httpcode and
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# make the error message a bit nicer (but still include the
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# traceback).
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# We also need to special-case IVLEJailError, as we can get another
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# almost-exception out of it.
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codename, msg = None, None
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if exc_type is util.IVLEJailError:
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msg = exc_value.type_str + ": " + exc_value.message
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tb = 'Exception information extracted from IVLEJailError:\n'
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tb += urllib.unquote(exc_value.info)
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else:
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try:
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codename, msg = req.get_http_codename(httpcode)
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except AttributeError:
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pass
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# Override the default message with the supplied one,
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# if available.
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if hasattr(exc_value, 'message') and exc_value.message is not None:
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msg = exc_value.message
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# Prepend the exception type
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if exc_type != util.IVLEError:
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msg = exc_type.__name__ + ": " + repr(msg)
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tb = ''.join(traceback.format_exception(exc_type, exc_value,
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exc_traceback))
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# Logging
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logging.error('%s\n%s'%(str(msg), tb))
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# Error messages are only displayed is the user is NOT a student,
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# or if there has been a problem logging the error message
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show_errors = (not publicmode) and ((login and \
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str(role) != "student") or logfail)
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req.write("""<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
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# Prepend the exception type
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if exc_type != util.IVLEError:
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msg = exc_type.__name__ + ": " + repr(msg)
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tb = ''.join(traceback.format_exception(exc_type, exc_value,
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exc_traceback))
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# Logging
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logging.error('%s\n%s'%(str(msg), tb))
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# Error messages are only displayed is the user is NOT a student,
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# or if there has been a problem logging the error message
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show_errors = (not publicmode) and ((login and \
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str(role) != "student") or logfail)
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req.write("""<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head><title>IVLE Internal Server Error</title></head>
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<body>
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<h1>IVLE Internal Server Error""")
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if (show_errors):
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if (codename is not None
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and httpcode != mod_python.apache.HTTP_INTERNAL_SERVER_ERROR):
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req.write(": %s" % cgi.escape(codename))
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req.write("""</h1>
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if (show_errors):
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if (codename is not None
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and httpcode != mod_python.apache.HTTP_INTERNAL_SERVER_ERROR):
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req.write(": %s" % cgi.escape(codename))
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req.write("""</h1>
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<p>An error has occured which is the fault of the IVLE developers or
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administration. The developers have been notified.</p>
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""")
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if (show_errors):
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if msg is not None:
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req.write("<p>%s</p>\n" % cgi.escape(msg))
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if httpcode is not None:
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req.write("<p>(HTTP error code %d)</p>\n" % httpcode)
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req.write("""
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<p>Please report this to <a href="mailto:%s">%s</a> (the system
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administrator). Include the following information:</p>
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""" % (cgi.escape(admin_email), cgi.escape(admin_email)))
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if (show_errors):
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if msg is not None:
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req.write("<p>%s</p>\n" % cgi.escape(msg))
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if httpcode is not None:
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req.write("<p>(HTTP error code %d)</p>\n" % httpcode)
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req.write("""
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<p>Please report this to <a href="mailto:%s">%s</a> (the system
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administrator). Include the following information:</p>
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""" % (cgi.escape(admin_email), cgi.escape(admin_email)))
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req.write("<pre>\n%s\n</pre>\n"%cgi.escape(tb))
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if logfail:
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req.write("<p>Warning: Could not open Error Log: '%s'</p>\n"
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%cgi.escape(logfile))
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req.write("</body></html>")
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req.write("<pre>\n%s\n</pre>\n"%cgi.escape(tb))
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if logfail:
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req.write("<p>Warning: Could not open Error Log: '%s'</p>\n"
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%cgi.escape(logfile))
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req.write("</body></html>")
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