python實作ftp上下傳，支援斷點續傳。

#!/usr/bin/python
#encoding=utf-8
 
from ftplib import FTP   
import sys   
import os.path   

           

#Ftp的類實作
           

class MyFTP(FTP):   
    ''' 
    conncet to FTP Server 
    '''   
    def __init__(self): 
        print 'make a object' 
    def ConnectFTP(self,remoteip,remoteport,loginname,loginpassword):   
        ftp=MyFTP() 
 
        try: 
            ftp.connect(remoteip,remoteport,600) 
            print 'success' 
        except Exception, e:
            print >> sys.stderr, "conncet failed1 - %s" % e
            return (0,'conncet failed')   
        else:   
            try:   
                ftp.login(loginname,loginpassword)   
                print('login success')
            except Exception, e:
                print >>sys.stderr, 'login failed - %s' % e
                return (0,'login failed')   
            else:
                print 'return 1'
                return (1,ftp)   
         
    def download(self,remoteHost,remotePort,loginname,loginpassword,remotePath,localPath):   
        #connect to the FTP Server and check the return   
        res = self.ConnectFTP(remoteHost,remotePort,loginname,loginpassword)   
        if(res[0]!=1):
            print >>sys.stderr, res[1]
            sys.exit()
             
        #change the remote directory and get the remote file size   
        ftp=res[1]
        ftp.set_pasv(0)
        dires = self.splitpath(remotePath)
        if dires[0]:
            ftp.cwd(dires[0])   # change remote work dir
        remotefile=dires[1]     # remote file name
        print dires[0]+' '+ dires[1]   
        fsize=ftp.size(remotefile)   
        if fsize==0 : # localfime's site is 0
            return
             
        #check local file isn't exists and get the local file size   
        lsize=0L
        if os.path.exists(localPath):   
            lsize=os.stat(localPath).st_size   
                 
        if lsize >= fsize:   
            print 'local file is bigger or equal remote file'   
            return   
        blocksize=1024 * 1024
        cmpsize=lsize
        ftp.voidcmd('TYPE I')
        conn = ftp.transfercmd('RETR '+remotefile,lsize)
        lwrite=open(localPath,'ab')
        while True:
            data=conn.recv(blocksize)
            if not data:
                break
            lwrite.write(data)
            cmpsize+=len(data)
            #print '\b'*30,'download process:%.2f%%'%(float(cmpsize)/fsize*100),
            print '\n','download process:%.2f%%'%(float(cmpsize)/fsize*100),
        lwrite.close()
        ftp.voidcmd('NOOP')
        ftp.voidresp()
        conn.close()
        ftp.quit()
 
    def upload(self,remotehost,remoteport,loginname,loginpassword,remotepath,localpath,callback=None):
        if not os.path.exists(localpath):
            print "Local file doesn't exists"
            return
        self.set_debuglevel(2)
        res=self.ConnectFTP(remotehost,remoteport,loginname,loginpassword)
        if res[0]!=1:
            print res[1]
            sys.exit()
        ftp=res[1]
        remote=self.splitpath(remotepath)
        ftp.cwd(remote[0])
        rsize=0L
        try:
            rsize=ftp.size(remote[1])
        except:
            pass
        if (rsize==None):
            rsize=0L
        lsize=os.stat(localpath).st_size
        print('rsize : %d, lsize : %d' % (rsize, lsize))
        if (rsize==lsize):
            print 'remote filesize is equal with local'
            return
        if (rsize<lsize):
            localf=open(localpath,'rb')
            localf.seek(rsize)
            ftp.voidcmd('TYPE I')
            datasock=''
            esize=''
            try:
                print(remote[1])
                datasock,esize=ftp.ntransfercmd("STOR "+remote[1],rsize)
            except Exception, e:
                print >>sys.stderr, '----------ftp.ntransfercmd-------- : %s' % e
                return
            cmpsize=rsize
            while True:
                buf=localf.read(1024 * 1024)
                if not len(buf):
                    print '\rno data break'
                    break
                datasock.sendall(buf)
                if callback:
                    callback(buf)
                cmpsize+=len(buf)
                print '\b'*30,'uploading %.2f%%'%(float(cmpsize)/lsize*100),
                if cmpsize==lsize:
                    print '\rfile size equal break'
                    break
            datasock.close()
            print 'close data handle'
            localf.close()
            print 'close local file handle'
            ftp.voidcmd('NOOP')
            print 'keep alive cmd success'
            ftp.voidresp()
            print 'No loop cmd'
            ftp.quit()
 
    def splitpath(self,remotepath):
        position=remotepath.rfind('/')
        return (remotepath[:position+1],remotepath[position+1:])

#下面是使用代碼
ftpClient = MyFTP();
ftpClient.download('10.61.101.151',21,'test','test','/home/test/X86_GDB','D:\Pmp\X86_GDB');
ftpClient.upload('10.61.101.151',21,'test','test','/home/test/123','D:\Pmp\g123');