263 lines
7.7 KiB
Python
263 lines
7.7 KiB
Python
"""\
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@file wrappedfd.py
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@author Bob Ippolito
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Copyright (c) 2005-2006, Bob Ippolito
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Copyright (c) 2007, Linden Research, Inc.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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"""
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from eventlet.api import trampoline, get_hub
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from eventlet import util
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BUFFER_SIZE = 4096
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import socket, errno
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def higher_order_recv(recv_func):
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def recv(self, buflen):
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buf = self.recvbuffer
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if buf:
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chunk, self.recvbuffer = buf[:buflen], buf[buflen:]
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return chunk
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fd = self.fd
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bytes = recv_func(fd, buflen)
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while bytes is None:
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try:
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trampoline(fd, read=True)
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except socket.error, e:
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if e[0] == errno.EPIPE:
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bytes = ''
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else:
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raise
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else:
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bytes = recv_func(fd, buflen)
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self.recvcount += len(bytes)
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return bytes
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return recv
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def higher_order_send(send_func):
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def send(self, data):
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count = send_func(self.fd, data)
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if not count:
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return 0
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self.sendcount += count
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return count
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return send
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class wrapped_fd(object):
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newlines = '\r\n'
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mode = 'wb+'
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is_secure = False
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def __init__(self, fd):
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self._closed = False
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self.fd = fd
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self._fileno = fd.fileno()
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self.recvbuffer = ''
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self.recvcount = 0
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self.sendcount = 0
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def getpeername(self, *args, **kw):
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fn = self.getpeername = self.fd.getpeername
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return fn(*args, **kw)
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def getsockname(self, *args, **kw):
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fn = self.getsockname = self.fd.getsockname
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return fn(*args, **kw)
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def listen(self, *args, **kw):
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fn = self.listen = self.fd.listen
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return fn(*args, **kw)
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def bind(self, *args, **kw):
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fn = self.bind = self.fd.bind
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return fn(*args, **kw)
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def getsockopt(self, *args, **kw):
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fn = self.getsockopt = self.fd.getsockopt
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return fn(*args, **kw)
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def setsockopt(self, *args, **kw):
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fn = self.setsockopt = self.fd.setsockopt
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return fn(*args, **kw)
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def connect_ex(self, *args, **kw):
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fn = self.connect_ex = self.fd.connect_ex
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return fn(*args, **kw)
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def fileno(self, *args, **kw):
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fn = self.fileno = self.fd.fileno
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return fn(*args, **kw)
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def setblocking(self, *args, **kw):
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fn = self.setblocking = self.fd.setblocking
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return fn(*args, **kw)
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def close(self, *args, **kw):
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if self._closed:
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return
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self._closed = True
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fn = self.close = self.fd.close
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try:
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res = fn(*args, **kw)
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finally:
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# This will raise socket.error(32, 'Broken pipe') if there's
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# a caller waiting on trampoline (e.g. server on .accept())
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get_hub().exc_descriptor(self._fileno)
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return res
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def accept(self):
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fd = self.fd
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while True:
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res = util.socket_accept(fd)
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if res is not None:
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client, addr = res
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util.set_nonblocking(client)
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return type(self)(client), addr
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trampoline(fd, read=True, write=True)
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def connect(self, address):
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fd = self.fd
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connect = util.socket_connect
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while not connect(fd, address):
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trampoline(fd, read=True, write=True)
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recv = higher_order_recv(util.socket_recv)
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def recvfrom(self, *args):
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trampoline(self.fd, read=True)
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return self.fd.recvfrom(*args)
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send = higher_order_send(util.socket_send)
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def sendto(self, *args):
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trampoline(self.fd, write=True)
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return self.fd.sendto(*args)
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def sendall(self, data):
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fd = self.fd
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tail = self.send(data)
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while tail < len(data):
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trampoline(self.fd, write=True)
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tail += self.send(data[tail:])
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def write(self, data):
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return self.sendall(data)
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def readuntil(self, terminator, size=None):
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buf, self.recvbuffer = self.recvbuffer, ''
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checked = 0
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if size is None:
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while True:
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found = buf.find(terminator, checked)
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if found != -1:
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found += len(terminator)
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chunk, self.recvbuffer = buf[:found], buf[found:]
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return chunk
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checked = len(buf)
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d = self.recv(BUFFER_SIZE)
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if not d:
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break
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buf += d
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return buf
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while len(buf) < size:
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found = buf.find(terminator, checked)
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if found != -1:
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found += len(terminator)
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chunk, self.recvbuffer = buf[:found], buf[found:]
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return chunk
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checked = len(buf)
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d = self.recv(BUFFER_SIZE)
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if not d:
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break
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buf += d
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chunk, self.recvbuffer = buf[:size], buf[size:]
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def readline(self, size=None):
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return self.readuntil(self.newlines, size=size)
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def __iter__(self):
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return self.xreadlines()
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def readlines(self, size=None):
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return list(self.xreadlines(size=size))
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def xreadlines(self, size=None):
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if size is None:
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while True:
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line = self.readline()
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if not line:
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break
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yield line
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else:
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while size > 0:
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line = self.readline(size)
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if not line:
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break
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yield line
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size -= len(line)
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def writelines(self, lines):
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for line in lines:
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self.write(line)
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def read(self, size=None):
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if size is not None and not isinstance(size, int):
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raise TypeError
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buf, self.recvbuffer = self.recvbuffer, ''
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lst = [buf]
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if size is None:
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while True:
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d = self.recv(BUFFER_SIZE)
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if not d:
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break
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lst.append(d)
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else:
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buflen = len(buf)
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while buflen < size:
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d = self.recv(BUFFER_SIZE)
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if not d:
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break
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buflen += len(d)
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lst.append(d)
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else:
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d = lst[-1]
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overbite = buflen - size
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if overbite:
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lst[-1], self.recvbuffer = d[:-overbite], d[-overbite:]
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else:
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lst[-1], self.recvbuffer = d, ''
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return ''.join(lst)
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def makefile(self, *args, **kw):
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return type(self)(self.fd)
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class wrapped_file(wrapped_fd):
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recv = higher_order_recv(util.file_recv)
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send = higher_order_send(util.file_send)
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def flush(self):
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self.fd.flush()
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