#!/usr/bin/python # Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you under the Apache License, Version 2.0 (the # "License"); you may not use this file except in compliance # with the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, # software distributed under the License is distributed on an # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY # KIND, either express or implied. See the License for the # specific language governing permissions and limitations # under the License. # HTTP client proxy functions from httplib import HTTPConnection, HTTPSConnection from urlparse import urlparse from StringIO import StringIO import os.path from string import strip from base64 import b64encode from sys import stderr from util import * from elemutil import * import atomutil import jsonutil import rssutil import xmlutil # JSON request id id = 1 # Make a callable HTTP client class client: def __init__(self, url): self.url = urlparse(url) def __call__(self, func, *args): print >> stderr, "Client proxy call", func, args # Connect to the configured URL c, headers = connect(self.url) # handle a GET request if func == "get": u = requesturi(self.url, car(args)) print >> stderr, "Client GET request", u c.request("GET", u, None, headers) res = c.getresponse() print >> stderr, "Client status", res.status if res.status != 200: return None ct = res.getheader("Content-type", "text/plain") ls = (res.read(),) if atomutil.isATOMEntry(ls): # Read an ATOM entry v = atomutil.entryValue(atomutil.readATOMEntry(ls)) print >> stderr, "Client result", v return v if contains(ct, "application/atom+xml") or atomutil.isATOMFeed(ls): # Read an ATOM feed v = atomutil.feedValues(atomutil.readATOMFeed(ls)) print >> stderr, "Client result", v return v if contains(ct, "application/rss+xml") or rssutil.isRSSFeed(ls): # Read an RSS feed v = rssutil.feedValues(rssutil.readRSSFeed(ls)) print >> stderr, "Client result", v return v if contains(ct, "text/javascript") or contains(ct, "application/json") or jsonutil.isJSON(ls): # Read a JSON document v = elementsToValues(jsonutil.readJSON(ls)) print >> stderr, "Client result", v return v if contains(ct, "text/xml") or contains(ct, "application/xml") or xmlutil.isXML(ls): # Read an XML document v = elementsToValues(xmlutil.readXML(ls)) print >> stderr, "Client result", v return v # Return the content type and a content list v = (ct, ls) print >> stderr, "Client result", v return v # handle a POST request if func == "post": u = requesturi(self.url, car(args)) print >> stderr, "Client POST request", u req = StringIO() writeStrings(atomutil.writeATOMEntry(atomutil.entryValuesToElements(cadr(args))), req) headers["Content-type"] = "application/atom+xml" c.request("POST", u, req.getvalue(), headers) res = c.getresponse() print >> stderr, "Client status", res.status if res.status != 200 and res.status != 201: return None loc = res.getheader("Location") if loc == None: return None return loc[(loc.rfind('/') + 1):] # handle a PUT request if func == "put": u = requesturi(self.url, car(args)) print >> stderr, "Client PUT request", u req = StringIO() writeStrings(atomutil.writeATOMEntry(atomutil.entryValuesToElements(cadr(args))), req) headers["Content-type"] = "application/atom+xml" c.request("PUT", u, req.getvalue(), headers) res = c.getresponse() print >> stderr, "Client status", res.status if res.status != 200: return None return True # handle a DELETE request if func == "delete": u = requesturi(self.url, car(args)) print >> stderr, "Client DELETE request", u c.request("DELETE", u, None, headers) res = c.getresponse() print >> stderr, "Client status", res.status if res.status != 200: return None return True # handle a JSON-RPC request u = requesturi(self.url, ()) print >> stderr, "Client JSON-RPC request", u global id req = StringIO() writeStrings(jsonutil.jsonRequest(id, func, args), req) id = id + 1 headers["Content-type"] = "application/json-rpc" c.request("POST", u, req.getvalue(), headers) res = c.getresponse() print >> stderr, "Client status", res.status if res.status != 200: return None v = jsonutil.jsonResultValue((res.read(),)) print >> stderr, "Client result", v return v def __getattr__(self, name): if name[0] == '_': raise AttributeError() if name == "eval": return self l = lambda *args: self.__call__(name, *args) self.__dict__[name] = l return l def __repr__(self): return repr((self.url,)) def mkclient(url): return client(url) # Connect to a URL, return a connection and any authorization headers def connect(url): if url.scheme == "https": # With HTTPS, use a cerficate or HTTP basic authentication if os.path.exists("server.key"): c = HTTPSConnection(url.hostname, 443 if url.port == None else url.port, "server.key", "server.crt") return c, {} else: c = HTTPSConnection(url.hostname, 443 if url.port == None else url.port) # For HTTP basic authentication the user and password may be # provided by htpasswd.py try: import htpasswd auth = 'Basic ' + b64encode(htpasswd.user + ':' + htpasswd.passwd) return c, {"Authorization": auth} except: return c, {} else: c = HTTPConnection(url.hostname, 80 if url.port == None else url.port) return c, {} # Convert a URL and arg to a request URI def requesturi(url, arg): return url.path + path(arg) + ("" if url.query == "" else "?" + url.query)