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