Python 基于Twisted框架的文件夹网络传输源码
由于文件夹可能有多层目录,因此需要对其进行递归遍历。 本文采取了简单的协议定制,定义了五条命令,指令Head如下: 每条命令以CMB_BEGIN开始,以CMB_END结束。 客户端需要对接收缓冲做解析,取出一条一条的指令,然后根据指令的Head做相应的处理,比如创建文件夹、写入文件等。 下面是服务端的代码: from twisted.internet import reactor from twisted.internet.protocol import Protocol,Factory from twisted.protocols.basic import LineReceiver import os import struct BUFSIZE = 4096 class SimpleLogger(Protocol): def connectionMade(self): print 'Got connection from',self.transport.client def connectionLost(self,reason): print self.transport.client,'disconnected' def dataReceived(self,line): print line self.transport.write("Hello Client,I am the Server!rn") self.transport.write("CMB_BEGIN") self.transport.write("Sync") self.transport.write("CMB_END") self.send_file_folder('server') def send_file_folder(self,folder): '''send folder to the client''' for f in os.listdir(folder): sourceF = os.path.join(folder,f) if os.path.isfile(sourceF): print 'File:',sourceF[7:] self.transport.write("CMB_BEGIN") self.transport.write("File:" + sourceF[7:]) self.transport.write("CMB_END") fp = open(sourceF,'rb') while 1: filedata = fp.read(BUFSIZE) if not filedata: break else: self.transport.write("CMB_BEGIN") self.transport.write(filedata) print 'send size:::::::::',len(filedata) self.transport.write("CMB_END") fp.close() self.transport.write("CMB_BEGIN") self.transport.write("End") self.transport.write("CMB_END") if os.path.isdir(sourceF): print 'Folder:',sourceF[7:] self.transport.write("CMB_BEGIN") self.transport.write("Folder:" + sourceF[7:]) self.transport.write("CMB_END") self.send_file_folder(sourceF) factory = Factory() factory.protocol = SimpleLogger reactor.listenTCP(1234,factory) reactor.run() Server在收到Client的某个信号之后(此代码中,当Client随便向Server发送任何内容都可),Server即会调用send_file_folder将sever文件夹下的内容全部发送给客户端。 服务端运行结果如下: 下面是客户端的代码: from twisted.internet.selectreactor import SelectReactor from twisted.internet.protocol import Protocol,ClientFactory from twisted.protocols.basic import LineReceiver import os from struct import * reactor = SelectReactor() protocol = Protocol() prepare = 0 filename = "" sourceDir = 'client' recvBuffer = '' def delete_file_folder(src): '''delete files and folders''' if os.path.isfile(src): try: os.remove(src) except: pass elif os.path.isdir(src): for item in os.listdir(src): itemsrc = os.path.join(src,item) delete_file_folder(itemsrc) try: os.rmdir(src) except: pass def clean_file_folder(src): '''delete files and child folders''' delete_file_folder(src) os.mkdir(src) def writefile(filename,data): print 'write file size:::::::::',len(data) fp = open(filename,'a+b') fp.write(data) fp.close() class QuickDisconnectedProtocol(Protocol): def connectionMade(self): print "Connected to %s."%self.transport.getPeer().host self.transport.write("Hello server,I am the client!rn") def dataReceived(self,line): global prepare global filename global sourceDir global recvBuffer recvBuffer = recvBuffer + line self.processRecvBuffer() def processRecvBuffer(self): global prepare global filename global sourceDir global recvBuffer while len(recvBuffer) > 0 : index1 = recvBuffer.find('CMB_BEGIN') index2 = recvBuffer.find('CMB_END') if index1 >= 0 and index2 >= 0: line = recvBuffer[index1+9:index2] recvBuffer = recvBuffer[index2+7:] if line == 'Sync': clean_file_folder(sourceDir) if line[0:3] == "End": prepare = 0 elif line[0:5] == "File:": name = line[5:] filename = os.path.join(sourceDir,name) print 'mk file:',filename prepare = 1 elif line[0:7] == "Folder:": name = line[7:] filename = os.path.join(sourceDir,name) print 'mkdir:',filename os.mkdir(filename) elif prepare == 1: writefile(filename,line) else: break class BasicClientFactory(ClientFactory): protocol=QuickDisconnectedProtocol def clientConnectionLost(self,connector,reason): print 'Lost connection: %s'%reason.getErrorMessage() reactor.stop() def clientConnectionFailed(self,reason): print 'Connection failed: %s'%reason.getErrorMessage() reactor.stop() reactor.connectTCP('localhost',1234,BasicClientFactory()) reactor.run() 客户端提取出来自Server的指令,当提取出Sync指令时,则将sourceDir目录清空,然后根据后续的指令,跟Server的文件夹进行同步。 客户端运行结果如下: 需要注意的地方: 经过测试,代码可以正常的运行,文件夹同步成功,文本文件、图像和其他类型的二进制文件均可正常传输。 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |