wsgi/handler.py
author Pierre-Yves David <pierre-yves.david@logilab.fr>
Tue, 09 Apr 2013 11:56:27 +0200
branchstable
changeset 8880 1cad6662e199
parent 8695 358d8bed9626
child 9030 c1d5e8ca15ea
child 9287 e70c8c70e344
permissions -rw-r--r--
Merge testfunc testfunc resurrection Closes #2535377
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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# copyright 2003-2012 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
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#
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# This file is part of CubicWeb.
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#
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# CubicWeb is free software: you can redistribute it and/or modify it under the
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# terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation, either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
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"""WSGI request handler for cubicweb"""
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cfd6ab461849 [Web-Request] Use rich header (closes #2204164)
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__docformat__ = "restructuredtext en"
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from itertools import chain, repeat, izip
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from cubicweb import AuthenticationError
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from cubicweb.web import DirectResponse
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from cubicweb.web.application import CubicWebPublisher
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from cubicweb.wsgi.request import CubicWebWsgiRequest
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# See http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
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STATUS_CODE_TEXT = {
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    100: 'CONTINUE',
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    101: 'SWITCHING PROTOCOLS',
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    200: 'OK',
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    201: 'CREATED',
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    202: 'ACCEPTED',
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    203: 'NON-AUTHORITATIVE INFORMATION',
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    204: 'NO CONTENT',
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    205: 'RESET CONTENT',
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    206: 'PARTIAL CONTENT',
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    300: 'MULTIPLE CHOICES',
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    301: 'MOVED PERMANENTLY',
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    302: 'FOUND',
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    303: 'SEE OTHER',
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    304: 'NOT MODIFIED',
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    305: 'USE PROXY',
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    306: 'RESERVED',
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    307: 'TEMPORARY REDIRECT',
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    400: 'BAD REQUEST',
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    401: 'UNAUTHORIZED',
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    402: 'PAYMENT REQUIRED',
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    403: 'FORBIDDEN',
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    404: 'NOT FOUND',
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    405: 'METHOD NOT ALLOWED',
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    406: 'NOT ACCEPTABLE',
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    407: 'PROXY AUTHENTICATION REQUIRED',
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    408: 'REQUEST TIMEOUT',
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    409: 'CONFLICT',
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    410: 'GONE',
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    411: 'LENGTH REQUIRED',
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    412: 'PRECONDITION FAILED',
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    413: 'REQUEST ENTITY TOO LARGE',
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    414: 'REQUEST-URI TOO LONG',
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    415: 'UNSUPPORTED MEDIA TYPE',
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    416: 'REQUESTED RANGE NOT SATISFIABLE',
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    417: 'EXPECTATION FAILED',
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    500: 'INTERNAL SERVER ERROR',
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    501: 'NOT IMPLEMENTED',
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    502: 'BAD GATEWAY',
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    503: 'SERVICE UNAVAILABLE',
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    504: 'GATEWAY TIMEOUT',
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    505: 'HTTP VERSION NOT SUPPORTED',
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}
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class WSGIResponse(object):
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    """encapsulates the wsgi response parameters
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    (code, headers and body if there is one)
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    """
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    def __init__(self, code, req, body=None):
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        text = STATUS_CODE_TEXT.get(code, 'UNKNOWN STATUS CODE')
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        self.status =  '%s %s' % (code, text)
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        self.headers = list(chain(*[izip(repeat(k), v)
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                                    for k, v in req.headers_out.getAllRawHeaders()]))
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        self.headers = [(str(k), str(v)) for k, v in self.headers]
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        if body:
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            self.body = [body]
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        else:
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            self.body = []
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    def __iter__(self):
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        return iter(self.body)
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class CubicWebWSGIApplication(object):
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    """This is the wsgi application which will be called by the
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    wsgi server with the WSGI ``environ`` and ``start_response``
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    parameters.
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    XXX: missing looping tasks and proper repository shutdown when
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    the application is stopped.
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    NOTE: no pyro
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    """
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    def __init__(self, config, vreg=None):
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        self.appli = CubicWebPublisher(config, vreg=vreg)
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        self.config = config
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        self.base_url = self.config['base-url']
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        self.https_url = self.config['https-url']
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        self.url_rewriter = self.appli.vreg['components'].select_or_none('urlrewriter')
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    def _render(self, req):
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        """this function performs the actual rendering
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        """
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        if self.base_url is None:
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            self.base_url = self.config._base_url = req.base_url()
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        try:
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            path = req.path
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            result = self.appli.handle_request(req, path)
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        except DirectResponse as ex:
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            return ex.response
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        return WSGIResponse(req.status_out, req, result)
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    def __call__(self, environ, start_response):
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        """WSGI protocol entry point"""
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        req = CubicWebWsgiRequest(environ, self.appli.vreg)
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        response = self._render(req)
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        start_response(response.status, response.headers)
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        return response.body
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    # these are overridden by set_log_methods below
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    # only defining here to prevent pylint from complaining
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    info = warning = error = critical = exception = debug = lambda msg,*a,**kw: None
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from logging import getLogger
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from cubicweb import set_log_methods
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set_log_methods(CubicWebWSGIApplication, getLogger('cubicweb.wsgi'))