wsgi/request.py
author Alexandre Fayolle <alexandre.fayolle@logilab.fr>
Thu, 24 Jun 2010 15:59:17 +0000
branchstable
changeset 5833 d7256ae7c1d1
parent 5426 0d4853a6e5ee
child 7879 9aae456abab5
permissions -rw-r--r--
fix schema migration hooks (partial) SQL Server requires some additional steps to alter columns (index drop and restore, etc...) and this in turn requires passing a connection on the DB to find out the indexes. Also partially fix an issue where the null_allowed value was not correctly computed. Still some problems in there (see https://www.logilab.net/cwo/ticket/1109558)
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# copyright 2003-2010 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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class CubicWebWsgiRequest(CubicWebRequestBase):
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    """most of this code COMES FROM DJANO
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    """
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    def __init__(self, environ, vreg, base_url=None):
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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._headers = 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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        self._base_url = base_url or self.instance_uri()
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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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        if files is not None:
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            for key, (name, _, stream) in files.iteritems():
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                name = unicode(name, self.encoding)
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                self.form[key] = (name, stream)
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        # prepare output headers
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        self.headers_out = {}
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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 base_url(self):
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        return self._base_url
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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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    def get_header(self, header, default=None):
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        """return the value associated with the given input HTTP header,
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        raise KeyError if the header is not set
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        """
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        return self._headers.get(normalize_header(header), default)
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    def set_header(self, header, value, raw=True):
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        """set an output HTTP header"""
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        assert raw, "don't know anything about non-raw headers for wsgi requests"
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        self.headers_out[header] = value
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    def add_header(self, header, value):
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        """add an output HTTP header"""
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        self.headers_out[header] = value
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    def remove_header(self, header):
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        """remove an output HTTP header"""
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        self.headers_out.pop(header, None)
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    def header_if_modified_since(self):
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        """If the HTTP header If-modified-since is set, return the equivalent
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        mx date time value (GMT), else return None
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        """
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        return None
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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
0
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
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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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   138
        url += quote(environ.get('SCRIPT_NAME') or '/')
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   139
        return url
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d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 0
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   140
0
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
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   141
    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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   143
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    def is_secure(self):
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   145
        return 'wsgi.url_scheme' in self.environ \
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            and self.environ['wsgi.url_scheme'] == 'https'
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   147
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    def get_posted_data(self):
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        files = None
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        if self.method == 'POST':
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
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   151
            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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   157
            else:
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   158
                post = qs2dict(self.raw_post_data)
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   159
        else:
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   160
            # The WSGI spec says 'QUERY_STRING' may be absent.
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   161
            post = qs2dict(self.environ.get('QUERY_STRING', ''))
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   162
        return post, files
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
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   163
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   164
    @property
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   165
    @cached
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   166
    def raw_post_data(self):
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   167
        buf = StringIO()
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
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   168
        try:
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   169
            # CONTENT_LENGTH might be absent if POST doesn't have content at all (lighttpd)
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   170
            content_length = int(self.environ.get('CONTENT_LENGTH', 0))
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   171
        except ValueError: # if CONTENT_LENGTH was empty string or not an integer
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   172
            content_length = 0
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   173
        if content_length > 0:
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   174
            safe_copyfileobj(self.environ['wsgi.input'], buf,
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                    size=content_length)
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   176
        postdata = buf.getvalue()
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   177
        buf.close()
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   178
        return postdata
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   179
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   180
    def _validate_cache(self):
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   181
        """raise a `DirectResponse` exception if a cached page along the way
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
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   182
        exists and is still usable
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   183
        """
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
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   184
        # XXX
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   185
#         if self.get_header('Cache-Control') in ('max-age=0', 'no-cache'):
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
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   186
#             # Expires header seems to be required by IE7
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   187
#             self.add_header('Expires', 'Sat, 01 Jan 2000 00:00:00 GMT')
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
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   188
#             return
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parents:
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   189
#         try:
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   190
#             http.checkPreconditions(self._twreq, _PreResponse(self))
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
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   191
#         except http.HTTPError, ex:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
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   192
#             self.info('valid http cache, no actual rendering')
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
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   193
#             raise DirectResponse(ex.response)
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
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   194
        # Expires header seems to be required by IE7
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
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   195
        self.add_header('Expires', 'Sat, 01 Jan 2000 00:00:00 GMT')