wsgi/request.py
author David Douard <david.douard@logilab.fr>
Mon, 29 Jul 2013 14:22:40 +0200
branchstable
changeset 9193 eaa58d1c7d5f
parent 8752 e19f4bba89cd
child 9563 48f0ff3e2a32
permissions -rw-r--r--
[pkg] python-central has been removed from Debian
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# copyright 2003-2011 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 adapter for cubicweb
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NOTE: each docstring tagged with ``COME FROM DJANGO`` means that
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the code has been taken (or adapted) from Djanco source code :
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  http://www.djangoproject.com/
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"""
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__docformat__ = "restructuredtext en"
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from StringIO import StringIO
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from urllib import quote
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from logilab.common.decorators import cached
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from cubicweb.web.request import CubicWebRequestBase
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from cubicweb.wsgi import (pformat, qs2dict, safe_copyfileobj, parse_file_upload,
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                           normalize_header)
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from cubicweb.web.http_headers import Headers
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class CubicWebWsgiRequest(CubicWebRequestBase):
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    """most of this code COMES FROM DJANGO
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    """
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    def __init__(self, environ, vreg):
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        self.environ = environ
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        self.path = environ['PATH_INFO']
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        self.method = environ['REQUEST_METHOD'].upper()
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        self.content = environ['wsgi.input']
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        headers_in = dict((normalize_header(k[5:]), v) for k, v in self.environ.items()
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                          if k.startswith('HTTP_'))
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        https = environ.get("HTTPS") in ('yes', 'on', '1')
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        post, files = self.get_posted_data()
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        super(CubicWebWsgiRequest, self).__init__(vreg, https, post,
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                                                  headers= headers_in)
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        if files is not None:
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            for key, (name, _, stream) in files.iteritems():
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                if name is not None:
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                    name = unicode(name, self.encoding)
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                self.form[key] = (name, stream)
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    def __repr__(self):
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        # Since this is called as part of error handling, we need to be very
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        # robust against potentially malformed input.
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        form = pformat(self.form)
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        meta = pformat(self.environ)
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        return '<CubicWebWsgiRequest\FORM:%s,\nMETA:%s>' % \
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            (form, meta)
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    ## cubicweb request interface ################################################
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    def http_method(self):
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        """returns 'POST', 'GET', 'HEAD', etc."""
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        return self.method
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    def relative_path(self, includeparams=True):
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        """return the normalized path of the request (ie at least relative
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        to the instance's root, but some other normalization may be needed
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        so that the returned path may be used to compare to generated urls
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        :param includeparams:
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           boolean indicating if GET form parameters should be kept in the path
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        """
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        path = self.environ['PATH_INFO']
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        path = path[1:] # remove leading '/'
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        if includeparams:
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            qs = self.environ.get('QUERY_STRING')
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            if qs:
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                return '%s?%s' % (path, qs)
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        return path
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    ## wsgi request helpers ###################################################
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    def instance_uri(self):
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        """Return the instance's base URI (no PATH_INFO or QUERY_STRING)
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        see python2.5's wsgiref.util.instance_uri code
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        """
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        environ = self.environ
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        url = environ['wsgi.url_scheme'] + '://'
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        if environ.get('HTTP_HOST'):
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            url += environ['HTTP_HOST']
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        else:
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            url += environ['SERVER_NAME']
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            if environ['wsgi.url_scheme'] == 'https':
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                if environ['SERVER_PORT'] != '443':
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                    url += ':' + environ['SERVER_PORT']
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            else:
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                if environ['SERVER_PORT'] != '80':
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                    url += ':' + environ['SERVER_PORT']
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        url += quote(environ.get('SCRIPT_NAME') or '/')
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        return url
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    def get_full_path(self):
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        return '%s%s' % (self.path, self.environ.get('QUERY_STRING', '') and ('?' + self.environ.get('QUERY_STRING', '')) or '')
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    def is_secure(self):
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        return 'wsgi.url_scheme' in self.environ \
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            and self.environ['wsgi.url_scheme'] == 'https'
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    def get_posted_data(self):
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        # The WSGI spec says 'QUERY_STRING' may be absent.
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        post = qs2dict(self.environ.get('QUERY_STRING', ''))
0
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        files = None
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        if self.method == 'POST':
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            if self.environ.get('CONTENT_TYPE', '').startswith('multipart'):
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                header_dict = dict((normalize_header(k[5:]), v)
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                                   for k, v in self.environ.items()
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                                   if k.startswith('HTTP_'))
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                header_dict['Content-Type'] = self.environ.get('CONTENT_TYPE', '')
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                post_, files = parse_file_upload(header_dict, self.raw_post_data)
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                post.update(post_)
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            else:
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                post.update(qs2dict(self.raw_post_data))
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        return post, files
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    @property
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    @cached
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    def raw_post_data(self):
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        buf = StringIO()
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        try:
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            # CONTENT_LENGTH might be absent if POST doesn't have content at all (lighttpd)
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            content_length = int(self.environ.get('CONTENT_LENGTH', 0))
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        except ValueError: # if CONTENT_LENGTH was empty string or not an integer
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            content_length = 0
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        if content_length > 0:
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            safe_copyfileobj(self.environ['wsgi.input'], buf,
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                    size=content_length)
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        postdata = buf.getvalue()
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        buf.close()
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        return postdata