sugar-toolkit-gtk3/src/sugar3/network.py

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# Copyright (C) 2006-2007 Red Hat, Inc.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
"""
STABLE.
"""
import os
import threading
import urllib
import fcntl
import tempfile
from gi.repository import GObject
import SimpleHTTPServer
import SocketServer
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__authinfos = {}
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def _add_authinfo(authinfo):
__authinfos[threading.currentThread()] = authinfo
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def get_authinfo():
return __authinfos.get(threading.currentThread())
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def _del_authinfo():
del __authinfos[threading.currentThread()]
class GlibTCPServer(SocketServer.TCPServer):
"""GlibTCPServer
Integrate socket accept into glib mainloop.
"""
allow_reuse_address = True
request_queue_size = 20
def __init__(self, server_address, RequestHandlerClass):
SocketServer.TCPServer.__init__(self, server_address,
RequestHandlerClass)
self.socket.setblocking(0) # Set nonblocking
# Watch the listener socket for data
GObject.io_add_watch(self.socket, GObject.IO_IN, self._handle_accept)
def _handle_accept(self, source, condition):
"""Process incoming data on the server's socket by doing an accept()
via handle_request()."""
if not (condition & GObject.IO_IN):
return True
self.handle_request()
return True
def close_request(self, request):
"""Called to clean up an individual request."""
# let the request be closed by the request handler when its done
pass
def shutdown_request(self, request):
"""Called to shutdown and close an individual request."""
# like close_request, let the request be closed by the request handler
# when done
pass
class ChunkedGlibHTTPRequestHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):
"""RequestHandler class that integrates with Glib mainloop. It writes
the specified file to the client in chunks, returning control to the
mainloop between chunks.
"""
CHUNK_SIZE = 4096
def __init__(self, request, client_address, server):
self._file = None
self._srcid = 0
SimpleHTTPServer.SimpleHTTPRequestHandler.__init__(
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self, request, client_address, server)
def log_request(self, code='-', size='-'):
pass
def do_GET(self):
"""Serve a GET request."""
self._file = self.send_head()
if self._file:
self._srcid = GObject.io_add_watch(self.wfile, GObject.IO_OUT |
GObject.IO_ERR,
self._send_next_chunk)
else:
self._cleanup()
def _send_next_chunk(self, source, condition):
if condition & GObject.IO_ERR:
self._cleanup()
return False
if not (condition & GObject.IO_OUT):
self._cleanup()
return False
data = self._file.read(self.CHUNK_SIZE)
count = os.write(self.wfile.fileno(), data)
if count != len(data) or len(data) != self.CHUNK_SIZE:
self._cleanup()
return False
return True
def _cleanup(self):
if self._file:
self._file.close()
self._file = None
if self._srcid > 0:
GObject.source_remove(self._srcid)
self._srcid = 0
if not self.wfile.closed:
self.wfile.flush()
self.wfile.close()
self.rfile.close()
def finish(self):
"""Close the sockets when we're done, not before"""
pass
def send_head(self):
"""Common code for GET and HEAD commands.
This sends the response code and MIME headers.
Return value is either a file object (which has to be copied
to the outputfile by the caller unless the command was HEAD,
and must be closed by the caller under all circumstances), or
None, in which case the caller has nothing further to do.
** [dcbw] modified to send Content-disposition filename too
"""
path = self.translate_path(self.path)
if not path or not os.path.exists(path):
self.send_error(404, 'File not found')
return None
f = None
if os.path.isdir(path):
for index in 'index.html', 'index.htm':
index = os.path.join(path, index)
if os.path.exists(index):
path = index
break
else:
return self.list_directory(path)
ctype = self.guess_type(path)
try:
# Always read in binary mode. Opening files in text mode may cause
# newline translations, making the actual size of the content
# transmitted *less* than the content-length!
f = open(path, 'rb')
except IOError:
self.send_error(404, 'File not found')
return None
self.send_response(200)
self.send_header('Content-type', ctype)
self.send_header('Content-Length', str(os.fstat(f.fileno())[6]))
self.send_header('Content-Disposition', 'attachment; filename="%s"' %
os.path.basename(path))
self.end_headers()
return f
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class GlibURLDownloader(GObject.GObject):
"""Grabs a URL in chunks, returning to the mainloop after each chunk"""
__gsignals__ = {
'finished': (GObject.SignalFlags.RUN_FIRST, None,
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([GObject.TYPE_PYOBJECT, GObject.TYPE_PYOBJECT])),
'error': (GObject.SignalFlags.RUN_FIRST, None,
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([GObject.TYPE_PYOBJECT])),
'progress': (GObject.SignalFlags.RUN_FIRST, None,
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([GObject.TYPE_PYOBJECT])),
}
CHUNK_SIZE = 4096
def __init__(self, url, destdir=None):
self._url = url
if not destdir:
destdir = tempfile.gettempdir()
self._destdir = destdir
self._srcid = 0
self._fname = None
self._outf = None
self._suggested_fname = None
self._info = None
self._written = 0
GObject.GObject.__init__(self)
def start(self, destfile=None, destfd=None):
self._info = urllib.urlopen(self._url)
self._outf = None
self._fname = None
if destfd and not destfile:
raise ValueError('Must provide destination file too when'
' specifying file descriptor')
if destfile:
self._suggested_fname = os.path.basename(destfile)
self._fname = os.path.abspath(os.path.expanduser(destfile))
if destfd:
# Use the user-supplied destination file descriptor
self._outf = destfd
else:
self._outf = os.open(self._fname, os.O_RDWR |
os.O_TRUNC | os.O_CREAT, 0644)
else:
fname = self._get_filename_from_headers(self._info.headers)
self._suggested_fname = fname
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garbage_, path = urllib.splittype(self._url)
garbage_, path = urllib.splithost(path or "")
path, garbage_ = urllib.splitquery(path or "")
path, garbage_ = urllib.splitattr(path or "")
suffix = os.path.splitext(path)[1]
(self._outf, self._fname) = tempfile.mkstemp(suffix=suffix,
dir=self._destdir)
fcntl.fcntl(self._info.fp.fileno(), fcntl.F_SETFD, os.O_NDELAY)
self._srcid = GObject.io_add_watch(self._info.fp.fileno(),
GObject.IO_IN | GObject.IO_ERR,
self._read_next_chunk)
def cancel(self):
if self._srcid == 0:
raise RuntimeError('Download already canceled or stopped')
self.cleanup(remove=True)
def _get_filename_from_headers(self, headers):
if 'Content-Disposition' not in headers:
return None
ftag = 'filename='
data = headers['Content-Disposition']
fidx = data.find(ftag)
if fidx < 0:
return None
fname = data[fidx + len(ftag):]
if fname[0] == '"' or fname[0] == "'":
fname = fname[1:]
if fname[len(fname) - 1] == '"' or fname[len(fname) - 1] == "'":
fname = fname[:len(fname) - 1]
return fname
def _read_next_chunk(self, source, condition):
if condition & GObject.IO_ERR:
self.cleanup(remove=True)
self.emit('error', 'Error downloading file.')
return False
elif not (condition & GObject.IO_IN):
# shouldn't get here, but...
return True
try:
data = self._info.fp.read(self.CHUNK_SIZE)
count = os.write(self._outf, data)
self._written += len(data)
# error writing data to file?
if count < len(data):
self.cleanup(remove=True)
self.emit('error', 'Error writing to download file.')
return False
self.emit('progress', self._written)
# done?
if len(data) < self.CHUNK_SIZE:
self.cleanup()
self.emit('finished', self._fname, self._suggested_fname)
return False
except Exception, err:
self.cleanup(remove=True)
self.emit('error', 'Error downloading file: %r' % err)
return False
return True
def cleanup(self, remove=False):
if self._srcid > 0:
GObject.source_remove(self._srcid)
self._srcid = 0
del self._info
self._info = None
os.close(self._outf)
if remove:
os.remove(self._fname)
self._outf = None