modules/wsgi/httputil.py

#!/usr/bin/python
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# 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 atomutil import *
from jsonutil import *

id = 1

# Make a callable HTTP client
class client:
    def __init__(self, uri):
        self.uri = urlparse(uri)

    def __call__(self, func, *args):

        # Connect to the configured URI
        print >> stderr, "Client POST", self.uri.geturl()
        c = None
        headers = {"Content-type": "application/json-rpc"}
        if self.uri.scheme == "https":

            # With HTTPS, use a cerficate or HTTP basic authentication
            if os.path.exists("server.key"):
                c = HTTPSConnection(self.uri.hostname, 443 if self.uri.port == None else self.uri.port, "server.key", "server.crt")
            else:
                c = HTTPSConnection(self.uri.hostname, 443 if self.uri.port == None else self.uri.port)

                # For HTTP basic authentication the user and password are
                # provided by htpasswd.py
                import htpasswd
                auth =  'Basic ' + b64encode(htpasswd.user + ':' + htpasswd.passwd)
                headers["Authorization"] = auth
        else:
            c = HTTPConnection(self.uri.hostname, 80 if self.uri.port == None else self.uri.port)

        # POST the JSON-RPC request
        global id
        req = StringIO()
        writeStrings(jsonRequest(id, func, args), req)
        id = id + 1
        c.request("POST", self.uri.path, req.getvalue(), headers)
        res = c.getresponse()
        print >> stderr, "Client status", res.status
        if res.status != 200:
            return None
        return jsonResultValue((res.read(),))

    def __repr__(self):
        return repr((self.uri,))

def mkclient(uri):
    return client(uri)