pep8 style fixes
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16e5e4e8c8
commit
06b48fe99f
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@ -1,14 +1,12 @@
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import sys
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sys.path.insert(0, './tmsp')
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from wire import *
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from server import *
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from wire import hex2bytes, decode_big_endian, encode_big_endian
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from server import TMSPServer
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from reader import BytesBuffer
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# tmsp application interface
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class CounterApplication():
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def __init__(self):
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self.hashCount = 0
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self.txCount = 0
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@ -17,7 +15,9 @@ class CounterApplication():
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def open(self):
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return CounterAppContext(self)
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class CounterAppContext():
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def __init__(self, app):
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self.app = app
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self.hashCount = app.hashCount
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@ -29,7 +29,9 @@ class CounterAppContext():
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return msg, 0
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def info(self):
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return ["hash, tx, commit counts:%d, %d, %d"%(self.hashCount, self.txCount, self.commitCount)], 0
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return ["hash, tx, commit counts:%d, %d, %d" % (self.hashCount,
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self.txCount,
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self.commitCount)], 0
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def set_option(self, key, value):
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if key == "serial" and value == "on":
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@ -41,7 +43,8 @@ class CounterAppContext():
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txByteArray = bytearray(txBytes)
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if len(txBytes) >= 2 and txBytes[:2] == "0x":
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txByteArray = hex2bytes(txBytes[2:])
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txValue = decode_big_endian(BytesBuffer(txByteArray), len(txBytes))
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txValue = decode_big_endian(
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BytesBuffer(txByteArray), len(txBytes))
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if txValue != self.txCount:
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return None, 1
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self.txCount += 1
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@ -1,21 +1,24 @@
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from wire import *
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from wire import decode_string
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# map type_byte to message name
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message_types = {
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0x01 : "echo",
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0x02 : "flush",
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0x03 : "info",
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0x04 : "set_option",
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0x21 : "append_tx",
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0x22 : "get_hash",
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0x23 : "commit",
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0x24 : "rollback",
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0x25 : "add_listener",
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0x26 : "rm_listener",
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0x01: "echo",
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0x02: "flush",
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0x03: "info",
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0x04: "set_option",
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0x21: "append_tx",
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0x22: "get_hash",
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0x23: "commit",
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0x24: "rollback",
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0x25: "add_listener",
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0x26: "rm_listener",
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}
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# return the decoded arguments of tmsp messages
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class RequestDecoder():
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def __init__(self, reader):
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self.reader = reader
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@ -50,5 +53,3 @@ class RequestDecoder():
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def rm_listener(self):
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# TODO
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return
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@ -1,6 +1,9 @@
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# Simple read() method around a bytearray
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class BytesBuffer():
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def __init__(self, b):
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self.buf = b
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self.readCount = 0
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@ -32,7 +35,10 @@ class BytesBuffer():
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return r
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# Buffer bytes off a tcp connection and read them off in chunks
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class ConnReader():
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def __init__(self, conn):
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self.conn = conn
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self.buf = bytearray()
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@ -1,16 +1,18 @@
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import socket
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import select
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import sys
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import os
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from wire import *
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from reader import *
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from msg import *
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from wire import decode_varint, encode
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from reader import BytesBuffer
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from msg import RequestDecoder, message_types
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# hold the asyncronous state of a connection
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# ie. we may not get enough bytes on one read to decode the message
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class Connection():
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def __init__(self, fd, appCtx):
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self.fd = fd
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self.appCtx = appCtx
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@ -27,10 +29,14 @@ class Connection():
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this.recBuf.write(data)
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# TMSP server responds to messges by calling methods on the app
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class TMSPServer():
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def __init__(self, app, port=5410):
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self.app = app
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self.appMap = {} # map conn file descriptors to (appContext, reqBuf, resBuf, msgDecoder)
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# map conn file descriptors to (appContext, reqBuf, resBuf, msgDecoder)
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self.appMap = {}
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self.port = port
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self.listen_backlog = 10
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@ -64,14 +70,14 @@ class TMSPServer():
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print "connection closed"
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def handle_recv(self, r):
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# appCtx, recBuf, resBuf, conn
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# appCtx, recBuf, resBuf, conn
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conn = self.appMap[r]
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while True:
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try:
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print "recv loop"
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# check if we need more data first
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if conn.inProgress:
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if conn.msgLength == 0 or conn.recBuf.size() < conn.msgLength:
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if (conn.msgLength == 0 or conn.recBuf.size() < conn.msgLength):
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conn.recv()
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else:
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if conn.recBuf.size() == 0:
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@ -94,17 +100,17 @@ class TMSPServer():
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# now we can decode the message
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# first read the request type and get the particular msg decoder
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# first read the request type and get the particular msg
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# decoder
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typeByte = conn.recBuf.read(1)
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typeByte = int(typeByte[0])
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resTypeByte = typeByte+0x10
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resTypeByte = typeByte + 0x10
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req_type = message_types[typeByte]
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if req_type == "flush":
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# messages are length prefixed
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conn.resBuf.write(encode(1))
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conn.resBuf.write([resTypeByte])
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sent = conn.fd.send(str(conn.resBuf.buf))
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conn.msgLength = 0
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conn.inProgress = False
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conn.resBuf = BytesBuffer(bytearray())
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@ -121,7 +127,7 @@ class TMSPServer():
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conn.inProgress = False
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req_f = getattr(conn.appCtx, req_type)
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if req_args == None:
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if req_args is None:
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res = req_f()
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elif isinstance(req_args, tuple):
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res = req_f(*req_args)
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@ -147,7 +153,7 @@ class TMSPServer():
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else:
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enc, encRet = encode(res), encode(ret_code)
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# messages are length prefixed
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conn.resBuf.write(encode(len(enc)+len(encRet)+1))
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conn.resBuf.write(encode(len(enc) + len(encRet) + 1))
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conn.resBuf.write([resTypeByte])
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conn.resBuf.write(encRet)
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conn.resBuf.write(enc)
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@ -164,13 +170,15 @@ class TMSPServer():
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self.handle_conn_closed(r)
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return
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except Exception as e:
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print "error reading from connection", str(e) # sys.exc_info()[0] # TODO better
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# sys.exc_info()[0] # TODO better
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print "error reading from connection", str(e)
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self.handle_conn_closed(r)
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return
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def main_loop(self):
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while not self.shutdown:
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r_list, w_list, _ = select.select(self.read_list, self.write_list, [], 2.5)
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r_list, w_list, _ = select.select(
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self.read_list, self.write_list, [], 2.5)
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for r in r_list:
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if (r == self.listener):
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@ -178,7 +186,7 @@ class TMSPServer():
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self.handle_new_connection(r)
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# undo adding to read list ...
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except rameError as e:
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except NameError as e:
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print "Could not connect due to NameError:", e
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except TypeError as e:
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print "Could not connect due to TypeError:", e
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@ -187,14 +195,12 @@ class TMSPServer():
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else:
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self.handle_recv(r)
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def handle_shutdown(self):
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for r in self.read_list:
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r.close()
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for w in self.write_list:
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try:
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w.close()
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except: pass
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except:
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pass
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self.shutdown = True
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@ -2,9 +2,11 @@
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# the decoder works off a reader
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# the encoder returns bytearray
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def hex2bytes(h):
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return bytearray(h.decode('hex'))
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def bytes2hex(b):
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if type(b) in (str, unicode):
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return "".join([hex(ord(c))[2:].zfill(2) for c in b])
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@ -17,23 +19,28 @@ def uvarint_size(i):
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if i == 0:
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return 0
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for j in xrange(1, 8):
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if i < 1<<j*8:
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if i < 1 << j * 8:
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return j
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return 8
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# expects i < 2**size
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def encode_big_endian(i, size):
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if size == 0:
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return bytearray()
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return encode_big_endian(i/256, size-1) + bytearray([i%256])
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return encode_big_endian(i / 256, size - 1) + bytearray([i % 256])
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def decode_big_endian(reader, size):
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if size == 0:
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return 0
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firstByte = reader.read(1)[0]
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return firstByte*(256**(size-1)) + decode_big_endian(reader, size-1)
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return firstByte * (256 ** (size - 1)) + decode_big_endian(reader, size - 1)
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# ints are max 16 bytes long
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def encode_varint(i):
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negate = False
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if i < 0:
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return bytearray([size]) + big_end
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# returns the int and whats left of the byte array
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def decode_varint(reader):
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size = reader.read(1)[0]
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if size == 0:
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return 0
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negate = True if size > int(0xF0) else False
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if negate: size = size -0xF0
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if negate:
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size = size - 0xF0
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i = decode_big_endian(reader, size)
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if negate: i = i*(-1)
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if negate:
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i = i * (-1)
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return i
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def encode_string(s):
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size = encode_varint(len(s))
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return size + bytearray(s)
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def decode_string(reader):
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length = decode_varint(reader)
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return str(reader.read(length))
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def encode_list(s):
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b = bytearray()
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map(b.extend, map(encode, s))
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return encode_varint(len(s)) + b
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def encode(s):
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if s == None:
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if s is None:
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return bytearray()
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if isinstance(s, int):
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return encode_varint(s)
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@ -85,13 +100,11 @@ def encode(s):
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print "UNSUPPORTED TYPE!", type(s), s
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import binascii
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if __name__ == '__main__':
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ns = [100,100,1000,256]
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ss = [2,5,5,2]
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bs = map(encode_big_endian, ns,ss)
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ds = map(decode_big_endian, bs,ss)
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ns = [100, 100, 1000, 256]
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ss = [2, 5, 5, 2]
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bs = map(encode_big_endian, ns, ss)
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ds = map(decode_big_endian, bs, ss)
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print ns
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print [i[0] for i in ds]
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