Beispiel #1
0
    def render(self, request):
        """
        Render me to a web client.

        Load my file, execute it in a special namespace (with 'request' and
        '__file__' global vars) and finish the request.  Output to the web-page
        will NOT be handled with print - standard output goes to the log - but
        with request.write.
        """
        request.setHeader(b"x-powered-by",
                          networkString("Twisted/%s" % copyright.version))
        namespace = {
            'request': request,
            '__file__': _coerceToFilesystemEncoding("", self.filename),
            'registry': self.registry
        }
        try:
            execfile(self.filename, namespace, namespace)
        except IOError as e:
            if e.errno == 2:  #file not found
                request.setResponseCode(http.NOT_FOUND)
                request.write(
                    resource.NoResource("File not found.").render(request))
        except:
            io = NativeStringIO()
            traceback.print_exc(file=io)
            output = util._PRE(io.getvalue())
            if _PY3:
                output = output.encode("utf8")
            request.write(output)
        request.finish()
        return server.NOT_DONE_YET
Beispiel #2
0
    def render(self, request):
        """
        Render me to a web client.

        Load my file, execute it in a special namespace (with 'request' and
        '__file__' global vars) and finish the request.  Output to the web-page
        will NOT be handled with print - standard output goes to the log - but
        with request.write.
        """
        request.setHeader(b"x-powered-by", networkString("Twisted/%s" % copyright.version))
        namespace = {'request': request,
                     '__file__': _coerceToFilesystemEncoding("", self.filename),
                     'registry': self.registry}
        try:
            execfile(self.filename, namespace, namespace)
        except IOError as e:
            if e.errno == 2: #file not found
                request.setResponseCode(http.NOT_FOUND)
                request.write(resource.NoResource("File not found.").render(request))
        except:
            io = NativeStringIO()
            traceback.print_exc(file=io)
            output = util._PRE(io.getvalue())
            if _PY3:
                output = output.encode("utf8")
            request.write(output)
        request.finish()
        return server.NOT_DONE_YET
Beispiel #3
0
 def failed(self, failure):
     #XXX: Argh. FIXME.
     failure = str(failure)
     self.request.write(
         resource.ErrorPage(
             http.INTERNAL_SERVER_ERROR, "Server Connection Lost",
             "Connection to distributed server lost:" +
             util._PRE(failure)).render(self.request))
     self.request.finish()
     self._log.info(failure)
Beispiel #4
0
 def failed(self, failure):
     #XXX: Argh. FIXME.
     failure = str(failure)
     self.request.write(
         resource.ErrorPage(http.INTERNAL_SERVER_ERROR,
                            "Server Connection Lost",
                            "Connection to distributed server lost:" +
                            util._PRE(failure)).
         render(self.request))
     self.request.finish()
     log.msg(failure)
    def render(self, resrc):
        """
        Ask a resource to render itself.

        @param resrc: a L{twisted.web.resource.IResource}.
        """
        try:
            body = resrc.render(self)
        except UnsupportedMethod as e:
            allowedMethods = e.allowedMethods
            if (self.method == b"HEAD") and (b"GET" in allowedMethods):
                # We must support HEAD (RFC 2616, 5.1.1).  If the
                # resource doesn't, fake it by giving the resource
                # a 'GET' request and then return only the headers,
                # not the body.
                log.msg("Using GET to fake a HEAD request for %s" %
                        (resrc,))
                self.method = b"GET"
                self._inFakeHead = True
                body = resrc.render(self)

                if body is NOT_DONE_YET:
                    log.msg("Tried to fake a HEAD request for %s, but "
                            "it got away from me." % resrc)
                    # Oh well, I guess we won't include the content length.
                else:
                    self.setHeader(b'content-length', intToBytes(len(body)))

                self._inFakeHead = False
                self.method = b"HEAD"
                self.write(b'')
                self.finish()
                return

            if self.method in (supportedMethods):
                # We MUST include an Allow header
                # (RFC 2616, 10.4.6 and 14.7)
                self.setHeader(b'Allow', b', '.join(allowedMethods))
                s = ('''Your browser approached me (at %(URI)s) with'''
                     ''' the method "%(method)s".  I only allow'''
                     ''' the method%(plural)s %(allowed)s here.''' % {
                         'URI': escape(nativeString(self.uri)),
                         'method': nativeString(self.method),
                         'plural': ((len(allowedMethods) > 1) and 's') or '',
                         'allowed': ', '.join(
                            [nativeString(x) for x in allowedMethods])
                     })
                epage = resource.ErrorPage(http.NOT_ALLOWED,
                                           "Method Not Allowed", s)
                body = epage.render(self)
            else:
                epage = resource.ErrorPage(
                    http.NOT_IMPLEMENTED, "Huh?",
                    "I don't know how to treat a %s request." %
                    (escape(self.method.decode("charmap")),))
                body = epage.render(self)
        # end except UnsupportedMethod

        if body == NOT_DONE_YET:
            return
        if not isinstance(body, bytes):
            body = resource.ErrorPage(
                http.INTERNAL_SERVER_ERROR,
                "Request did not return bytes",
                "Request: " + util._PRE(reflect.safe_repr(self)) + "<br />" +
                "Resource: " + util._PRE(reflect.safe_repr(resrc)) + "<br />" +
                "Value: " + util._PRE(reflect.safe_repr(body))).render(self)

        if self.method == b"HEAD":
            if len(body) > 0:
                # This is a Bad Thing (RFC 2616, 9.4)
                log.msg("Warning: HEAD request %s for resource %s is"
                        " returning a message body."
                        "  I think I'll eat it."
                        % (self, resrc))
                self.setHeader(b'content-length',
                               intToBytes(len(body)))
            self.write(b'')
        else:
            self.setHeader(b'content-length',
                           intToBytes(len(body)))
            self.write(body)
        self.finish()