524 lines
18 KiB
Python
524 lines
18 KiB
Python
# Copyright (C) 2006, Red Hat, Inc.
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the
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# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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# Boston, MA 02111-1307, USA.
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# pylint: disable-msg = W0221
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import socket
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import os
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import threading
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import traceback
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import xmlrpclib
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import sys
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import httplib
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import urllib
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import fcntl
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import gobject
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import SimpleXMLRPCServer
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import SimpleHTTPServer
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import SocketServer
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__authinfos = {}
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def _add_authinfo(authinfo):
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__authinfos[threading.currentThread()] = authinfo
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def get_authinfo():
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return __authinfos.get(threading.currentThread())
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def _del_authinfo():
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del __authinfos[threading.currentThread()]
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class GlibTCPServer(SocketServer.TCPServer):
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"""GlibTCPServer
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Integrate socket accept into glib mainloop.
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"""
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allow_reuse_address = True
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request_queue_size = 20
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def __init__(self, server_address, RequestHandlerClass):
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SocketServer.TCPServer.__init__(self, server_address, RequestHandlerClass)
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self.socket.setblocking(0) # Set nonblocking
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# Watch the listener socket for data
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gobject.io_add_watch(self.socket, gobject.IO_IN, self._handle_accept)
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def _handle_accept(self, source, condition):
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"""Process incoming data on the server's socket by doing an accept()
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via handle_request()."""
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if not (condition & gobject.IO_IN):
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return True
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self.handle_request()
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return True
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class ChunkedGlibHTTPRequestHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):
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"""RequestHandler class that integrates with Glib mainloop. It writes
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the specified file to the client in chunks, returning control to the
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mainloop between chunks.
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"""
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CHUNK_SIZE = 4096
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def __init__(self, request, client_address, server):
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self._file = None
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self._srcid = 0
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SimpleHTTPServer.SimpleHTTPRequestHandler.__init__(self, request, client_address, server)
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def log_request(self, code='-', size='-'):
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pass
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def do_GET(self):
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"""Serve a GET request."""
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self._file = self.send_head()
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if self._file:
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self._srcid = gobject.io_add_watch(self.wfile, gobject.IO_OUT | gobject.IO_ERR, self._send_next_chunk)
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else:
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self._file.close()
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self._cleanup()
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def _send_next_chunk(self, source, condition):
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if condition & gobject.IO_ERR:
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self._cleanup()
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return False
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if not (condition & gobject.IO_OUT):
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self._cleanup()
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return False
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data = self._file.read(self.CHUNK_SIZE)
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count = os.write(self.wfile.fileno(), data)
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if count != len(data) or len(data) != self.CHUNK_SIZE:
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self._cleanup()
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return False
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return True
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def _cleanup(self):
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if self._file:
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self._file.close()
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if self._srcid > 0:
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gobject.source_remove(self._srcid)
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self._srcid = 0
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if not self.wfile.closed:
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self.wfile.flush()
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self.wfile.close()
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self.rfile.close()
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def finish(self):
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"""Close the sockets when we're done, not before"""
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pass
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def send_head(self):
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"""Common code for GET and HEAD commands.
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This sends the response code and MIME headers.
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Return value is either a file object (which has to be copied
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to the outputfile by the caller unless the command was HEAD,
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and must be closed by the caller under all circumstances), or
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None, in which case the caller has nothing further to do.
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** [dcbw] modified to send Content-disposition filename too
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"""
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path = self.translate_path(self.path)
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f = None
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if os.path.isdir(path):
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for index in "index.html", "index.htm":
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index = os.path.join(path, index)
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if os.path.exists(index):
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path = index
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break
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else:
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return self.list_directory(path)
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ctype = self.guess_type(path)
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try:
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# Always read in binary mode. Opening files in text mode may cause
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# newline translations, making the actual size of the content
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# transmitted *less* than the content-length!
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f = open(path, 'rb')
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except IOError:
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self.send_error(404, "File not found")
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return None
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self.send_response(200)
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self.send_header("Content-type", ctype)
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self.send_header("Content-Length", str(os.fstat(f.fileno())[6]))
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self.send_header("Content-Disposition", 'attachment; filename="%s"' % os.path.basename(path))
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self.end_headers()
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return f
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class GlibURLDownloader(gobject.GObject):
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"""Grabs a URL in chunks, returning to the mainloop after each chunk"""
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__gsignals__ = {
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'finished': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT, gobject.TYPE_PYOBJECT])),
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'error': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT]))
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}
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CHUNK_SIZE = 4096
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def __init__(self, url, destdir=None):
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self._url = url
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if not destdir:
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destdir = "/tmp"
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self._destdir = destdir
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self._srcid = 0
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self._fname = None
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self._outf = None
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gobject.GObject.__init__(self)
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def start(self):
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self._info = urllib.urlopen(self._url)
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self._suggested_fname = self._get_filename_from_headers(self._info.headers)
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import tempfile
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garbage, path = urllib.splittype(self._url)
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garbage, path = urllib.splithost(path or "")
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path, garbage = urllib.splitquery(path or "")
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path, garbage = urllib.splitattr(path or "")
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suffix = os.path.splitext(path)[1]
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(self._outf, self._fname) = tempfile.mkstemp(suffix=suffix, dir=self._destdir)
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fcntl.fcntl(self._info.fp.fileno(), fcntl.F_SETFD, os.O_NDELAY)
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self._srcid = gobject.io_add_watch(self._info.fp.fileno(),
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gobject.IO_IN | gobject.IO_ERR,
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self._read_next_chunk)
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def _get_filename_from_headers(self, headers):
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if not headers.has_key("Content-Disposition"):
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return None
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ftag = "filename="
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data = headers["Content-Disposition"]
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fidx = data.find(ftag)
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if fidx < 0:
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return None
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fname = data[fidx+len(ftag):]
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if fname[0] == '"' or fname[0] == "'":
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fname = fname[1:]
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if fname[len(fname)-1] == '"' or fname[len(fname)-1] == "'":
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fname = fname[:len(fname)-1]
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return fname
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def _read_next_chunk(self, source, condition):
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if condition & gobject.IO_ERR:
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self.cleanup()
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os.remove(self._fname)
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self.emit("error", "Error downloading file.")
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return False
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elif not (condition & gobject.IO_IN):
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# shouldn't get here, but...
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return True
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try:
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data = self._info.fp.read(self.CHUNK_SIZE)
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count = os.write(self._outf, data)
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if len(data) < self.CHUNK_SIZE:
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self.cleanup()
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self.emit("finished", self._fname, self._suggested_fname)
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return False
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if count < len(data):
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self.cleanup()
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self.emit("error", "Error writing to download file.")
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return False
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except Exception, err:
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self.cleanup()
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self.emit("error", "Error downloading file: %s" % err)
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return False
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return True
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def cleanup(self):
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if self._srcid > 0:
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gobject.source_remove(self._srcid)
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self._srcid = 0
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del self._info
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self._info = None
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os.close(self._outf)
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self._outf = None
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class GlibXMLRPCRequestHandler(SimpleXMLRPCServer.SimpleXMLRPCRequestHandler):
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""" GlibXMLRPCRequestHandler
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The stock SimpleXMLRPCRequestHandler and server don't allow any way to pass
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the client's address and/or SSL certificate into the function that actually
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_processes_ the request. So we have to store it in a thread-indexed dict.
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"""
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def do_POST(self):
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_add_authinfo(self.client_address)
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try:
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SimpleXMLRPCServer.SimpleXMLRPCRequestHandler.do_POST(self)
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except socket.timeout:
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pass
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except socket.error, e:
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print "Error (%s): socket error - '%s'" % (self.client_address, e)
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except:
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print "Error while processing POST:"
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traceback.print_exc()
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_del_authinfo()
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class GlibXMLRPCServer(GlibTCPServer, SimpleXMLRPCServer.SimpleXMLRPCDispatcher):
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"""GlibXMLRPCServer
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Use nonblocking sockets and handle the accept via glib rather than
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blocking on accept().
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"""
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def __init__(self, addr, requestHandler=GlibXMLRPCRequestHandler,
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logRequests=0, allow_none=False):
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self.logRequests = logRequests
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if sys.version_info[:3] >= (2, 5, 0):
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SimpleXMLRPCServer.SimpleXMLRPCDispatcher.__init__(self, allow_none, encoding="utf-8")
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else:
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SimpleXMLRPCServer.SimpleXMLRPCDispatcher.__init__(self)
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GlibTCPServer.__init__(self, addr, requestHandler)
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def _marshaled_dispatch(self, data, dispatch_method = None):
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"""Dispatches an XML-RPC method from marshalled (XML) data.
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XML-RPC methods are dispatched from the marshalled (XML) data
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using the _dispatch method and the result is returned as
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marshalled data. For backwards compatibility, a dispatch
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function can be provided as an argument (see comment in
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SimpleXMLRPCRequestHandler.do_POST) but overriding the
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existing method through subclassing is the prefered means
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of changing method dispatch behavior.
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"""
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params, method = xmlrpclib.loads(data)
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# generate response
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try:
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if dispatch_method is not None:
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response = dispatch_method(method, params)
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else:
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response = self._dispatch(method, params)
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# wrap response in a singleton tuple
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response = (response,)
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response = xmlrpclib.dumps(response, methodresponse=1)
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except xmlrpclib.Fault, fault:
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response = xmlrpclib.dumps(fault)
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except:
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print "Exception while processing request:"
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traceback.print_exc()
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# report exception back to server
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response = xmlrpclib.dumps(
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xmlrpclib.Fault(1, "%s:%s" % (sys.exc_type, sys.exc_value))
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)
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return response
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class GlibHTTP(httplib.HTTP):
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"""Subclass HTTP so we can return it's connection class' socket."""
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def connect(self, host=None, port=None):
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httplib.HTTP.connect(self, host, port)
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self._conn.sock.setblocking(0)
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class GlibXMLRPCTransport(xmlrpclib.Transport):
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"""Integrate the request with the glib mainloop rather than blocking."""
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##
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# Connect to server.
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#
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# @param host Target host.
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# @return A connection handle.
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def __init__(self, use_datetime=0):
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if sys.version_info[:3] >= (2, 5, 0):
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xmlrpclib.Transport.__init__(self, use_datetime)
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def make_connection(self, host):
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"""Use our own connection object so we can get its socket."""
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# create a HTTP connection object from a host descriptor
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host, extra_headers, x509 = self.get_host_info(host)
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return GlibHTTP(host)
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##
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# Send a complete request, and parse the response.
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#
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# @param host Target host.
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# @param handler Target PRC handler.
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# @param request_body XML-RPC request body.
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# @param verbose Debugging flag.
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# @return Parsed response.
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def start_request(self, host, handler, request_body, verbose=0, reply_handler=None, error_handler=None, user_data=None):
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"""Do the first half of the request by sending data to the remote
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server. The bottom half bits get run when the remote server's response
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actually comes back."""
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# issue XML-RPC request
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h = self.make_connection(host)
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if verbose:
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h.set_debuglevel(1)
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self.send_request(h, handler, request_body)
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self.send_host(h, host)
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self.send_user_agent(h)
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self.send_content(h, request_body)
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# Schedule a GIOWatch so we don't block waiting for the response
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gobject.io_add_watch(h._conn.sock, gobject.IO_IN, self._finish_request,
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h, host, handler, verbose, reply_handler, error_handler, user_data)
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def _finish_request(self, source, condition, h, host, handler, verbose, reply_handler=None, error_handler=None, user_data=None):
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"""Parse and return response when the remote server actually returns it."""
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if not (condition & gobject.IO_IN):
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return True
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try:
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errcode, errmsg, headers = h.getreply()
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except socket.error, err:
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if err[0] != 104:
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raise socket.error(err)
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else:
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if error_handler:
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gobject.idle_add(error_handler, err, user_data)
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return False
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if errcode != 200:
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raise xmlrpclib.ProtocolError(host + handler, errcode, errmsg, headers)
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self.verbose = verbose
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response = self._parse_response(h.getfile(), h._conn.sock)
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if reply_handler:
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# Coerce to a list so we can append user data
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response = response[0]
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if not isinstance(response, list):
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response = [response]
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response.append(user_data)
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gobject.idle_add(reply_handler, *response)
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return False
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class _Method:
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"""Right, so python people thought it would be funny to make this
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class private to xmlrpclib.py..."""
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# some magic to bind an XML-RPC method to an RPC server.
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# supports "nested" methods (e.g. examples.getStateName)
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def __init__(self, send, name):
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self.__send = send
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self.__name = name
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def __getattr__(self, name):
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return _Method(self.__send, "%s.%s" % (self.__name, name))
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def __call__(self, *args, **kwargs):
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return self.__send(self.__name, *args, **kwargs)
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class GlibServerProxy(xmlrpclib.ServerProxy):
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"""Subclass xmlrpclib.ServerProxy so we can run the XML-RPC request
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in two parts, integrated with the glib mainloop, such that we don't
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block anywhere.
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Using this object is somewhat special; it requires more arguments to each
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XML-RPC request call than the normal xmlrpclib.ServerProxy object:
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client = GlibServerProxy("http://127.0.0.1:8888")
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user_data = "bar"
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xmlrpc_arg1 = "test"
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xmlrpc_arg2 = "foo"
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client.test(xmlrpc_test_cb, user_data, xmlrpc_arg1, xmlrpc_arg2)
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Here, 'xmlrpc_test_cb' is the callback function, which has the following
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signature:
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def xmlrpc_test_cb(result_status, response, user_data=None):
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...
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"""
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def __init__(self, uri, encoding=None, verbose=0, allow_none=0):
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self._transport = GlibXMLRPCTransport()
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self._encoding = encoding
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self._verbose = verbose
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self._allow_none = allow_none
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xmlrpclib.ServerProxy.__init__(self, uri, self._transport, encoding, verbose, allow_none)
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# get the url
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import urllib
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urltype, uri = urllib.splittype(uri)
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if urltype not in ("http", "https"):
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raise IOError, "unsupported XML-RPC protocol"
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self._host, self._handler = urllib.splithost(uri)
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if not self._handler:
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self._handler = "/RPC2"
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def __request(self, methodname, *args, **kwargs):
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"""Call the method on the remote server. We just start the request here
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and the transport itself takes care of scheduling the response callback
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when the remote server returns the response. We don't want to block anywhere."""
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request = xmlrpclib.dumps(args, methodname, encoding=self._encoding,
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allow_none=self._allow_none)
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reply_hdl = kwargs.get("reply_handler")
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err_hdl = kwargs.get("error_handler")
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udata = kwargs.get("user_data")
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try:
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response = self._transport.start_request(
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self._host,
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self._handler,
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request,
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verbose=self._verbose,
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reply_handler=reply_hdl,
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error_handler=err_hdl,
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user_data=udata
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)
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except socket.error, exc:
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if err_hdl:
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gobject.idle_add(err_hdl, exc, udata)
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def __getattr__(self, name):
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# magic method dispatcher
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return _Method(self.__request, name)
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class Test(object):
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def test(self, arg1, arg2):
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print "Request got %s, %s" % (arg1, arg2)
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return "success", "bork"
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def xmlrpc_success_cb(response, resp2, loop):
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print "Response was %s %s" % (response, resp2)
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loop.quit()
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def xmlrpc_error_cb(err, loop):
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print "Error: %s" % err
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loop.quit()
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def xmlrpc_test(loop):
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client = GlibServerProxy("http://127.0.0.1:8888")
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client.test("bar", "baz",
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reply_handler=xmlrpc_success_cb,
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error_handler=xmlrpc_error_cb,
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user_data=loop)
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|
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def main():
|
|
loop = gobject.MainLoop()
|
|
server = GlibXMLRPCServer(("", 8888))
|
|
inst = Test()
|
|
server.register_instance(inst)
|
|
gobject.idle_add(xmlrpc_test, loop)
|
|
try:
|
|
loop.run()
|
|
except KeyboardInterrupt:
|
|
print 'Ctrl+C pressed, exiting...'
|
|
print "Done."
|
|
|
|
if __name__ == "__main__":
|
|
main()
|