本文实例讲述了python实现的文件同步服务器。分享给大家供大家参考。具体实现方法如下：

　　服务端使用asyncore, 收到文件后保存到本地。

　　客户端使用pyinotify监视目录的变化 ，把变动的文件发送到服务端。

　　重点：

　　1. 使用structs打包发送文件的信息，服务端收到后，根据文件信息来接收客户端传送过来的文件。

　　2. 客户端使用多线程，pyinotify监视到文件变化，放到队列中，由另外一个线程发送。

　　上代码：

　　服务端：

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 # receive file from client and store them into file use asyncore.# #/usr/bin/python #coding: utf-8 import asyncore import socket from socket import errno import logging import time import sys import struct import os import fcntl import threading from rrd_graph import MakeGraph try: import rrdtool except (ImportError, ImportWarnning): print "Hope this information can help you:" print "Can not find pyinotify module in sys path, just run [apt-get install python-rrdtool] in ubuntu." sys.exit(1) class RequestHandler(asyncore.dispatcher): def __init__(self, sock, map=None, chunk_size=1024): self.logger = logging.getLogger('%s-%s' % (self.__class__.__name__, str(sock.getsockname()))) self.chunk_size = chunk_size asyncore.dispatcher.__init__(self,sock,map) self.data_to_write = list() def readable(self): #self.logger.debug("readable() called.") return True def writable(self): response = (not self.connected) or len(self.data_to_write) #self.logger.debug('writable() -> %s data length -> %s' % (response, len(self.data_to_write))) return response def handle_write(self): data = self.data_to_write.pop() #self.logger.debug("handle_write()->%s size: %s",data.rstrip('rn'),len(data)) sent = self.send(data[:self.chunk_size]) if sent < len(data): remaining = data[sent:] self.data_to_write.append(remaining) def handle_read(self): self.writen_size = 0 nagios_perfdata = '../perfdata' head_packet_format = "!LL128s128sL" head_packet_size = struct.calcsize(head_packet_format) data = self.recv(head_packet_size) if not data: return filepath_len, filename_len, filepath,filename, filesize = struct.unpack(head_packet_format,data) filepath = os.path.join(nagios_perfdata, filepath[:filepath_len]) filename = filename[:filename_len] self.logger.debug("update file: %s" % filepath + '/' + filename) try: if not os.path.exists(filepath): os.makedirs(filepath) except OSError: pass self.fd = open(os.path.join(filepath,filename), 'w') #self.fd = open(filename,'w') if filesize > self.chunk_size: times = filesize / self.chunk_size first_part_size = times * self.chunk_size second_part_size = filesize % self.chunk_size while 1: try: data = self.recv(self.chunk_size) #self.logger.debug("handle_read()->%s size.",len(data)) except socket.error,e: if e.args[0] == errno.EWOULDBLOCK: print "EWOULDBLOCK" time.sleep(1) else: #self.logger.debug("Error happend while receive data: %s" % e) break else: self.fd.write(data) self.fd.flush() self.writen_size += len(data) if self.writen_size == first_part_size: break #receive the packet at last while 1: try: data = self.recv(second_part_size) #self.logger.debug("handle_read()->%s size.",len(data)) except socket.error,e: if e.args[0] == errno.EWOULDBLOCK: print "EWOULDBLOCK" time.sleep(1) else: #self.logger.debug("Error happend while receive data: %s" % e) break else: self.fd.write(data) self.fd.flush() self.writen_size += len(data) if len(data) == second_part_size: break elif filesize <= self.chunk_size: while 1: try: data = self.recv(filesize) #self.logger.debug("handle_read()->%s size.",len(data)) except socket.error,e: if e.args[0] == errno.EWOULDBLOCK: print "EWOULDBLOCK" time.sleep(1) else: #self.logger.debug("Error happend while receive data: %s" % e) break else: self.fd.write(data) self.fd.flush() self.writen_size += len(data) if len(data) == filesize: