需要将多个文件从客户端传输到服务器

Question

我最近正在开展一个项目,我基本上都在制作一个Dropbox克隆.服务器和客户端工作正常,但我有一个小问题.我能够将单个文件从客户端传输到服务器,但是当我尝试将所有文​​件一起传输时,它会在传输第一个文件后给出错误,所以基本上我的代码只适用于单个文件.我需要让它适用于多个文件.任何帮助将不胜感激.这是我的代码

服务器代码

import socket
import thread
import hashlib

serversock = socket.socket()
host = socket.gethostname();
port = 9000;
serversock.bind((host,port));
filename = ""
serversock.listen(10);
print "Waiting for a connection....."

clientsocket,addr = serversock.accept() 
print("Got a connection from %s" % str(addr))
while True:
    size = clientsocket.recv(1)
    filesz = clientsocket.recv(1)
    if filesz.isdigit():
        size += filesz
        filesize = int(size)
    else:
        filesize = int(size)    
    print filesize
    for i in range(0,filesize):
        if filesz.isdigit():
            filename += clientsocket.recv(1)
        else:
            filename += filesz
            filesz = "0"
    print filename      
    file_to_write = open(filename, 'wb')
    while True:
        data = clientsocket.recv(1024)
        #print data
        if not data:
            break
        file_to_write.write(data)
    file_to_write.close()
    print 'File received successfully'
serversock.close()

客户代码

import socket
import os
import thread

s = socket.socket() 
host = socket.gethostname()                           
port = 9000
s.connect((host, port))
path = "C:\Users\Fahad\Desktop"
directory = os.listdir(path)
for files in directory:
    print files  
    filename = files
    size = bytes(len(filename))
    #print size
    s.send(size)
    s.send(filename)
    file_to_send = open(filename, 'rb')
    l = file_to_send.read()
    s.sendall(l)
    file_to_send.close()       
    print 'File Sent'                                              
s.close()                                                                           

这是我得到的错误

Waiting for a connection.....
Got a connection from ('192.168.0.100', 58339)
13
Betternet.lnk
File received successfully
Traceback (most recent call last):
  File "server.py", line 22, in <module>
    filesize = int(size)
ValueError: invalid literal for int() with base 10: ''

Answer 1

您的代码片段中有几个小问题。也许你可以做这样的事情？

import socket
import thread
import hashlib

serversock = socket.socket()
host = socket.gethostname();
port = 9000;
serversock.bind((host,port));
filename = ""
serversock.listen(10);
print "Waiting for a connection....."

clientsocket,addr = serversock.accept()
print("Got a connection from %s" % str(addr))
while True:
    size = clientsocket.recv(16) # Note that you limit your filename length to 255 bytes.
    if not size:
        break
    size = int(size, 2)
    filename = clientsocket.recv(size)
    filesize = clientsocket.recv(32)
    filesize = int(filesize, 2)
    file_to_write = open(filename, 'wb')
    chunksize = 4096
    while filesize > 0:
        if filesize < chunksize:
            chunksize = filesize
        data = clientsocket.recv(chunksize)
        file_to_write.write(data)
        filesize -= len(data)

    file_to_write.close()
    print 'File received successfully'
serversock.close()

客户：

import socket
import os
import thread

s = socket.socket()
host = socket.gethostname()
port = 9000
s.connect((host, port))
path = "blah"
directory = os.listdir(path)
for files in directory:
    print files
    filename = files
    size = len(filename)
    size = bin(size)[2:].zfill(16) # encode filename size as 16 bit binary
    s.send(size)
    s.send(filename)

    filename = os.path.join(path,filename)
    filesize = os.path.getsize(filename)
    filesize = bin(filesize)[2:].zfill(32) # encode filesize as 32 bit binary
    s.send(filesize)

    file_to_send = open(filename, 'rb')

    l = file_to_send.read()
    s.sendall(l)
    file_to_send.close()
    print 'File Sent'

s.close()

这里客户端还发送文件的大小。大小和文件大小都编码为二进制字符串（您可以使用另一种方法）。文件名长度（大小）最多可以采用 2^16 的值，发送文件最多可以有 2^32 字节（即 2^文件大小）。