python实现的LAN文件传输服务

#  -*- coding: utf-8 -*-
# Give wisdom to the machine,By ChangShouMeng\
# 定义传输的上下文，client与server通用的上下文
import time
import os,sys,traceback

class FileTransferContext(object):
    TRANSFER_TYPE_SEND=0
    TRANSFER_TYPE_RECV=1
     def  __init__(self):
        self.transferType=0
        self.filePath =  ""   #  absolute path,send
        self.fileTotalSize = 0
        self.fileChunkSize=1024
        self.contextName= " - "
        self.fileBaseName= "" # only filename,recv
        self.fileHandle = None
        self.transferedSize=0
        self.transferMsgId = 0
        self.transferSeqNum = 0
        self.transferSeqNumUpLimit = 0
        self.transferSeqChunkSize = 10
        self.transferBeginTime = 0
        self.tmpdir= " temp "
        self.workStatus=0

     def  __del__(self):
        self.finiTransInfo()

     def initTransferInfo(self):
         print  " ---begin----init transfer info "
         try:
             if  self.transferType== FileTransferContext.TRANSFER_TYPE_SEND:
                self.contextName= " snd>> "
                self.fileTotalSize = os.path.getsize(self.filePath)
                self.fileBaseName = os.path.basename(self.filePath)
                self.fileHandle=open(self.filePath, ' rb ')
             else:
                self.contextName= " rcv<< "
                tmp_fn = r " {0}/{1}_tmp ".format(self.tmpdir, self.fileBaseName)
                self.fileHandle=open(tmp_fn, ' wb ')
                 print tmp_fn
                 assert self.fileHandle
            self.transferBeginTime= (int)(time.time())
            self.transferedSize=0
            self.transferSeqNumUpLimit=self.fileTotalSize/self.fileChunkSize + 1
            self.workStatus=1
             print  " initTransferInfo {0} fileName:{1} fileSize:{2} ".format(self.contextName,self.fileBaseName,self.fileTotalSize)
             return True
         except:
             print  " initTransferinfo failed: ",traceback.print_exc()
             print  " init filepath is: ",self.filePath
         return False

     def  finiTransInfo(self):
         if  not self.fileHandle:
             return
         try:
             if self.transferType == FileTransferContext.TRANSFER_TYPE_RECV:
                self.fileHandle.flush()
            self.fileHandle.close()
            self.fileHandle=None
         except:
             print  " finiTransInfo failed: ", traceback.print_exc()


     def traceTransferInfo(self):
         if self.transferedSize == self.fileTotalSize:
            self.workStatus=2
         if self.transferSeqNum > 5  and (self.transferSeqNum % self.transferSeqChunkSize) != 0:
             return
        useTime  = int(time.time()) - self.transferBeginTime
        speed =  ""
        progress = float(self.transferedSize) / float(self.fileTotalSize)
         if useTime > 0:
             speedint = float(self.transferedSize) / float(useTime * 1024)
              if speedint >= 1024:
                 speedint=  float(speedint)/ float(1024)
                 speed= " {:.2f}mb/s ".format(speedint)
              else:
                 speed= " {:.2f}kb/s ".format(speedint)
              pass
         print  " {0}msgid:{1} total:{2}byte tranfered:{3}byte speed:{4} progress:{5:.2f} use-time:{6}s ".format(
            self.contextName,
            self.transferMsgId,
            self.fileTotalSize,
            self.transferedSize,
            speed,
            progress,
            useTime)


     def readBuffer(self):
         try:
             return self.fileHandle.read(self.fileChunkSize)
         except:
             print  " readBuffer err: ",traceback.print_exc()
         return  ""

     def writeBuffer(self,buffer):
         try:
            self.fileHandle.write(buffer)
             if (self.transferSeqNum % self.transferSeqChunkSize) == 0:
                self.fileHandle.flush()
            self.transferedSize += len(buffer)
            # print self.transferedSize,self.fileTotalSize
             if self.transferedSize == self.fileTotalSize:
                self.fileHandle.flush()
                self.fileHandle.close()
                self.fileHandle=None
                tmp_fn =  " {0}/{1}_tmp ".format(self.tmpdir, self.fileBaseName)
                real_fn =  " {0}/{1} ".format(self.tmpdir, self.fileBaseName)
                 print  " - "*80
                 print  " tmp_fn: ",tmp_fn
                 print  " real_fn: ",real_fn
                 if os.path.exists(real_fn):
                    os.remove(real_fn)
                os.rename(tmp_fn,real_fn)
                self.workStatus=2
         except:
             print  " writeBuffer err: ",traceback.print_exc()
         return

     def isFinished(self):
         if self.workStatus <= 1:
             return False
         return True

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代码下载：  https://github.com/changshoumeng/python_local-network_file-transfer-service
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