132 lines
4.4 KiB
Python
132 lines
4.4 KiB
Python
import socket
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import threading
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import time
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import asyncore_pollchoose as asyncore
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from debug import logger
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from helper_threading import BusyError, nonBlocking
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import state
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class AdvancedDispatcher(asyncore.dispatcher):
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_buf_len = 131072 # 128kB
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def __init__(self, sock=None):
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if not hasattr(self, '_map'):
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asyncore.dispatcher.__init__(self, sock)
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self.read_buf = bytearray()
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self.write_buf = bytearray()
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self.state = "init"
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self.lastTx = time.time()
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self.sentBytes = 0
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self.receivedBytes = 0
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self.expectBytes = 0
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self.readLock = threading.RLock()
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self.writeLock = threading.RLock()
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self.processingLock = threading.RLock()
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def append_write_buf(self, data):
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if data:
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if isinstance(data, list):
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with self.writeLock:
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for chunk in data:
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self.write_buf.extend(chunk)
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else:
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with self.writeLock:
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self.write_buf.extend(data)
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def slice_write_buf(self, length=0):
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if length > 0:
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with self.writeLock:
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if length >= len(self.write_buf):
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del self.write_buf[:]
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else:
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del self.write_buf[0:length]
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def slice_read_buf(self, length=0):
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if length > 0:
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with self.readLock:
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if length >= len(self.read_buf):
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del self.read_buf[:]
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else:
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del self.read_buf[0:length]
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def process(self):
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while self.connected and not state.shutdown:
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try:
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with nonBlocking(self.processingLock):
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if not self.connected or state.shutdown:
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break
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if len(self.read_buf) < self.expectBytes:
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return False
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if not getattr(self, "state_" + str(self.state))():
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break
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except AttributeError:
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logger.error("Unknown state %s", self.state, exc_info=True)
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raise
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except BusyError:
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return False
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return False
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def set_state(self, state, length=0, expectBytes=0):
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self.expectBytes = expectBytes
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self.slice_read_buf(length)
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self.state = state
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def writable(self):
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self.uploadChunk = AdvancedDispatcher._buf_len
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if asyncore.maxUploadRate > 0:
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self.uploadChunk = int(asyncore.uploadBucket)
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self.uploadChunk = min(self.uploadChunk, len(self.write_buf))
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return asyncore.dispatcher.writable(self) and \
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(self.connecting or (self.connected and self.uploadChunk > 0))
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def readable(self):
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self.downloadChunk = AdvancedDispatcher._buf_len
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if asyncore.maxDownloadRate > 0:
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self.downloadChunk = int(asyncore.downloadBucket)
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try:
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if self.expectBytes > 0 and not self.fullyEstablished:
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self.downloadChunk = min(self.downloadChunk, self.expectBytes - len(self.read_buf))
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if self.downloadChunk < 0:
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self.downloadChunk = 0
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except AttributeError:
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pass
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return asyncore.dispatcher.readable(self) and \
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(self.connecting or self.accepting or (self.connected and self.downloadChunk > 0))
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def handle_read(self):
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self.lastTx = time.time()
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newData = self.recv(self.downloadChunk)
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self.receivedBytes += len(newData)
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asyncore.update_received(len(newData))
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with self.readLock:
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self.read_buf.extend(newData)
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def handle_write(self):
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self.lastTx = time.time()
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written = self.send(self.write_buf[0:self.uploadChunk])
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asyncore.update_sent(written)
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self.sentBytes += written
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self.slice_write_buf(written)
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def handle_connect_event(self):
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try:
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asyncore.dispatcher.handle_connect_event(self)
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except socket.error as e:
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if e.args[0] not in asyncore._DISCONNECTED:
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raise
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def handle_connect(self):
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self.lastTx = time.time()
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def state_close(self):
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return False
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def handle_close(self):
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with self.readLock:
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self.read_buf = bytearray()
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with self.writeLock:
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self.write_buf = bytearray()
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self.set_state("close")
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self.close()
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