[Inteproxy-commits] r2 - / trunk
scm-commit@wald.intevation.org
scm-commit at wald.intevation.org
Mon Oct 30 16:53:57 CET 2006
Author: jan
Date: 2006-10-30 16:53:57 +0100 (Mon, 30 Oct 2006)
New Revision: 2
Added:
trunk/
trunk/COPYING
trunk/InteProxy.py
Removed:
COPYING
InteProxy.py
Log:
Moving files into subdirectory "trunk" to conform with SVN policy.
Deleted: COPYING
===================================================================
--- COPYING 2006-10-30 15:51:39 UTC (rev 1)
+++ COPYING 2006-10-30 15:53:57 UTC (rev 2)
@@ -1,340 +0,0 @@
- GNU GENERAL PUBLIC LICENSE
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- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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Deleted: InteProxy.py
===================================================================
--- InteProxy.py 2006-10-30 15:51:39 UTC (rev 1)
+++ InteProxy.py 2006-10-30 15:53:57 UTC (rev 2)
@@ -1,350 +0,0 @@
-#! /usr/bin/python
-# Copyright (C) 2006 by Intevation GmbH
-# Authors:
-# Bernhard Herzog <bh at intevation.de>
-#
-# This program is free software under the GPL (>=v2)
-# Read the file COPYING coming with the software for details.
-
-"""A HTTP server that translates http into https
-
-Usage:
-
-python InteProxy.py
-"""
-
-import sys
-import optparse
-import traceback
-import time
-import urlparse
-import urllib2
-import BaseHTTPServer
-import threading
-import Queue
-import socket
-
-try:
- import pywin.dialogs.login
- windowsystem = "pywin"
-except ImportError:
- windowsystem = "crt"
-
-
-def getpassword_pywin(title):
- return pywin.dialogs.login.GetLogin(title)
-
-def getpassword_crt(title):
- import getpass
- try:
- user = raw_input(title)
- password = getpass.getpass()
- except IOError:
- import traceback
- traceback.print_exception()
- user = password = None
- return user, password
-
-getpassword = globals()["getpassword_" + windowsystem]
-
-# the central queue for the communication between master and worker
-# thread.
-the_queue = Queue.Queue(0)
-
-def worker_thread():
- """The worker thread
-
- This function takes requests out of the queue and handles them.
- """
- while 1:
- request = the_queue.get()
- request()
-
-
-class InteProxyHTTPRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
-
- # Whether the SHUTDOWN method is allowed. If allowed, anybody who can
- # connect to the server can shutdown the server.
- allow_shutdown = False
-
- def do_SHUTDOWN(self):
- """Shutdown the server if self.allow_shutdown is True (default False).
-
- To shutdown the server, this method calls the server's
- server_close method.
- """
- if self.allow_shutdown:
- self.server.server_close()
- self.send_response(200)
- # somewhat ugly hack: connect to this server, to unblock the
- # accept call.
- s = socket.socket(socket.AF_INET)
- s.connect(("localhost", self.server.server_port))
- s.close()
- else:
- self.send_error(400)
-
- def do_GET(self):
- """Handle a GET request"""
- self.handle_proxy_request("GET")
-
- def do_POST(self):
- """Handle a POST request"""
- self.handle_proxy_request("POST")
-
- def handle_proxy_request(self, method):
- """Handle a request that needs to be 'proxied'
-
- Method should be either 'POST' or 'GET'. Both methods are
- handled in the same way. The real host to connect to is
- determined from the url: The path component starts with the real
- hostname. The method strips that hostname from the path and
- connects to the new host. All headers from the HTTP request and
- any extra data are passed through to the remote host and the
- reponse is likewise simply copied through. The only exception
- is the Host: header from the original request. It would be
- wrong, so it is removed and a new one is generated pointing to
- the real remote host.
- """
- netloc, url = self.convert_url(self.path)
-
- #
- # Create a http request for the real location
- #
- request = urllib2.Request("https://%s/%s" % (netloc, url))
- for header, value in self.headers.items():
- if header.lower() == "host":
- # the host header will be set by httplib and it should
- # not be set twice, so we omit it. The value we
- # received from the client would have been wrong anyway
- # as it refers to the host this proxy is running on.
- continue
- elif header.lower() in ("content-length", "content-type"):
- # When a post request is redirected with the 302 code,
- # urllib2 will do a GET request for the new url even
- # when the original request was POST. This does not
- # conform to RFC 2616, but it's apparently what many
- # clients do and some servers expect (e.g. a POST
- # request to http://intevation.de/roundup/kolab/ is
- # redirected to
- # https://intevation.de/roundup/kolab/issue<num> and the
- # server expects a GET request for that.). However,
- # when doing the new request urllib2 copies all headers
- # except for those added with add_unredirected_header.
- # The content-length and content-type headers are only
- # needed for POST request so we have to make sure
- # they're not send when redirection occurs.
- request.add_unredirected_header(header, value)
- else:
- request.add_header(header, value)
-
- # If any data is associated with the request pass it through
- length = int(self.headers.getheader("Content-Length", "0"))
- if length:
- # FIXME: check whether length bytes were read
- request.add_data(self.rfile.read(length))
-
- #
- # Retrieve the url described by the request and pass everything
- # through to the client.
- #
- try:
- response = urllib2.urlopen(request)
- except urllib2.HTTPError, err:
- # a HTTPError is a valid http response object, so we can
- # treat it like a normal response.
- response = err
- self.send_response(response.code, response.msg)
- for header, value in response.info().items():
- self.send_header(header, value)
- self.end_headers()
-
- transfer_encoding = response.info().get("Transfer-encoding")
- self.transfer_data(response.read, self.wfile.write,
- chunked = (transfer_encoding == "chunked"))
-
- def transfer_data(self, read, write, length=None, chunked=False):
- """Transfer data from one 'file' to another in chunks
-
- The files are given by their read and write methods so it
- doesn't have to be a file. The read parameter must be callable
- with an integer argument indicating the maximum number of bytes
- to read and the write parameter must be callable with a string.
- If the parameter chunked is true, the method uses the 'chunked'
- transfer encoding when writing the data.
- """
- max_chunk_size = 4096
- while 1:
- if length is not None:
- chunk_size = min(length, max_chunk_size)
- else:
- chunk_size = max_chunk_size
- chunk = read(chunk_size)
- if not chunk:
- break
- if length is not None:
- length -= len(chunk)
- if chunked:
- write("%x\r\n" % len(chunk))
- write(chunk)
- if chunked:
- write("\r\n")
- if chunked:
- write("0\r\n\r\n")
-
- def convert_url(self, url):
- """Extract the real host from the url and return host and new url
-
- The URL parameter is the part of the URL from the GET or POST
- request which is actually only the path, query and fragment in
- the terminology of the urlparse module. For the InteProxy, the
- first component in the path is the actual host to connect to.
- This method extracts that part and creates a new path with that
- part removed. The return value of this method is the tuple
- (real_host, new_url) where new_url is the combined new path and
- the original query and fragment parts.
- """
- scheme, netloc, path, query, fragment = urlparse.urlsplit(url)
-
- # both scheme and netloc must be empty strings because the url
- # we work with is the url on the first line of a HTTP request
- # which doesn't include them
- assert scheme == ""
- assert netloc == ""
-
- split_path = path.split("/")
- if not split_path[0]:
- del split_path[0]
- real_netloc = split_path.pop(0)
- real_path = "/" + "/".join(split_path)
- return real_netloc, urlparse.urlunsplit(("", "", real_path, query,
- fragment))
-
- def log_exception(self, exc_info):
- """Log an exception
-
- This method produces a log message via self.log_message and then
- prints a the exception given by exc_info, which should be the
- return value of sys.exc_info, to stderr. By default log_message
- also writes to stderr, so both the message and the traceback
- should go to the same place.
- """
- self.log_message("Exception for previous 500 code\n")
- traceback.print_exception(*(exc_info + (None, sys.stderr)))
- sys.stderr.flush()
-
-
-# same as the BaseHTTPRequestHandler method, but as a standalone function:
-def log_date_time_string():
- """Return the current time formatted for logging."""
- now = time.time()
- year, month, day, hh, mm, ss, x, y, z = time.localtime(now)
- s = "%02d/%3s/%04d %02d:%02d:%02d" % (
- day, BaseHTTPServer.BaseHTTPRequestHandler.monthname[month],
- year, hh, mm, ss)
- return s
-
-
-class MasterWorkerServer(BaseHTTPServer.HTTPServer):
-
- do_shutdown = False
-
- def serve_forever(self):
- """Handle requests until self.do_shutdown is True."""
- while not self.do_shutdown:
- self.handle_request()
-
- def server_close(self):
- """Shutdown the server.
-
- Usually this is called from a thread while another thread
- executes the server_forever method. In that case the other
- thread is most likely blocked while listening for new
- connections. After this method returns, the caller will have to
- do something to unblock the other thread, such as creating a TCP
- connection to the server.
- """
- BaseHTTPServer.HTTPServer.server_close(self)
- self.do_shutdown = True
-
- def process_request(self, request, client_address):
- """Put the request into the queue to be handled by the worker thread
- """
- def process_in_worker():
- try:
- self.finish_request(request, client_address)
- self.close_request(request)
- except:
- self.handle_error(request, client_address)
- self.close_request(request)
- sys.stderr.write("[%s] queue contains %d items\n" %
- (log_date_time_string(), the_queue.qsize()))
- the_queue.put(process_in_worker)
-
- def handle_error(self, request, client_address):
- """Override to integrate the error reporting better with the other logs
- """
- sys.stderr.write("[%s] Exception while handling request from %r\n"
- % (log_date_time_string(), client_address))
- traceback.print_exception(*(sys.exc_info() + (None, sys.stderr)))
- sys.stderr.flush()
-
-
-class IntePasswordManager(urllib2.HTTPPasswordMgr):
-
- def find_user_password(self, realm, authuri):
- user, password \
- = urllib2.HTTPPasswordMgr.find_user_password(self, realm, authuri)
- if user is None:
- # no password known yet. Ask the user
- authuri = "https://" + "".join(self.reduce_uri(authuri))
- title = "Username for %r realm %r: " % (authuri, realm)
- user, password = getpassword(title)
- return user, password
-
-def setup_urllib2():
- auth_handler = urllib2.HTTPBasicAuthHandler(IntePasswordManager())
- httphandler = urllib2.HTTPHandler()
- opener = urllib2.build_opener(auth_handler, httphandler)
- urllib2.install_opener(opener)
-
-
-def run_server(HandlerClass = InteProxyHTTPRequestHandler,
- ServerClass = MasterWorkerServer):
- """Run the InteProxy server"""
- parser = optparse.OptionParser()
- parser.set_defaults(port=64609)
- parser.add_option("--logfile")
- parser.add_option("--allow-shutdown", action="store_true")
- parser.add_option("--port", type="int")
- opts, rest = parser.parse_args()
-
- HandlerClass.allow_shutdown = opts.allow_shutdown
-
- setup_urllib2()
-
- server_address = ('localhost', opts.port)
-
- if opts.logfile:
- sys.stderr = open(opts.logfile, "a", 0)
-
- sys.stderr.write("[%s] server starting up\n" % log_date_time_string())
-
- httpd = ServerClass(server_address, HandlerClass)
-
- sys.stderr.write("[%s] starting worker thread\n" % log_date_time_string())
- worker = threading.Thread(target = worker_thread)
- worker.setDaemon(1)
- worker.start()
-
- print "Serving HTTP on port", opts.port, "..."
- sys.stderr.write("[%s] serving HTTP on port %d\n"
- % (log_date_time_string(), opts.port))
- httpd.serve_forever()
- logmessage = "[%s] server stopped" % (log_date_time_string(),)
- print logmessage
- sys.stderr.write(logmessage + "\n")
-
-
-if __name__ == '__main__':
- run_server()
Copied: trunk/COPYING (from rev 1, COPYING)
Copied: trunk/InteProxy.py (from rev 1, InteProxy.py)
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