Mini Shell
"""
Tutorial: HTTP errors
HTTPError is used to return an error response to the client.
CherryPy has lots of options regarding how such errors are
logged, displayed, and formatted.
"""
import os
import os.path
import cherrypy
localDir = os.path.dirname(__file__)
curpath = os.path.normpath(os.path.join(os.getcwd(), localDir))
class HTTPErrorDemo(object):
# Set a custom response for 403 errors.
_cp_config = {'error_page.403':
os.path.join(curpath, 'custom_error.html')}
@cherrypy.expose
def index(self):
# display some links that will result in errors
tracebacks = cherrypy.request.show_tracebacks
if tracebacks:
trace = 'off'
else:
trace = 'on'
return """
<html><body>
<p>Toggle tracebacks <a href="toggleTracebacks">%s</a></p>
<p><a href="/doesNotExist">Click me; I'm a broken link!</a></p>
<p>
<a href="/error?code=403">
Use a custom error page from a file.
</a>
</p>
<p>These errors are explicitly raised by the application:</p>
<ul>
<li><a href="/error?code=400">400</a></li>
<li><a href="/error?code=401">401</a></li>
<li><a href="/error?code=402">402</a></li>
<li><a href="/error?code=500">500</a></li>
</ul>
<p><a href="/messageArg">You can also set the response body
when you raise an error.</a></p>
</body></html>
""" % trace
@cherrypy.expose
def toggleTracebacks(self):
# simple function to toggle tracebacks on and off
tracebacks = cherrypy.request.show_tracebacks
cherrypy.config.update({'request.show_tracebacks': not tracebacks})
# redirect back to the index
raise cherrypy.HTTPRedirect('/')
@cherrypy.expose
def error(self, code):
# raise an error based on the get query
raise cherrypy.HTTPError(status=code)
@cherrypy.expose
def messageArg(self):
message = ("If you construct an HTTPError with a 'message' "
'argument, it wil be placed on the error page '
'(underneath the status line by default).')
raise cherrypy.HTTPError(500, message=message)
tutconf = os.path.join(os.path.dirname(__file__), 'tutorial.conf')
if __name__ == '__main__':
# CherryPy always starts with app.root when trying to map request URIs
# to objects, so we need to mount a request handler root. A request
# to '/' will be mapped to HelloWorld().index().
cherrypy.quickstart(HTTPErrorDemo(), config=tutconf)
Zerion Mini Shell 1.0