使用套接字编程Python发送图像 [英] Send image using socket programming Python

问题描述

我正在尝试使用python中的套接字编程发送图像文件。我能够发送一个文本文件。但我一直在尝试发送一个图像文件，打开它并以字符串形式读取图像文件的内容，然后发送字符串并在客户端接收它，然后将其写入一个具有相同名称的文件中。不同的目录，但我无法打开该文件。我也在下面发布我的代码，评论的部分表明我已经尝试过了。此外，我在发送整数大小时遇到问题，但我在另一端收到一些随机字符串。

I am trying to send an image file using socket programming in python. I am able to send a text file. But I have been trying to send an image file, by opening it and reading the contents of the image file in a string and then sending the string and receiving it on the client side and then writing it to a file with the same name in a different directory, but I am unable to open the file. Also I am posting my code below, the commented parts are an indication that I have already tried it. Also I am having problems sending the integer size but I am receiving some random string on the other side.

这个是服务器脚本

import socket
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.bind(("", 5000))
server_socket.listen(5)
import os


client_socket, address = server_socket.accept()
print "Conencted to - ",address,"\n"
while (1):
    choice = client_socket.recv(1024)
    choice = int(choice)
    if(choice == 1):
        data = client_socket.recv(1024)
        print "The following data was received - ",data
        print "Opening file - ",data
        fp = open(data,'r')
        strng = fp.read()
        size = os.path.getsize(data)
        size = str(size)
        client_socket.send(size)
        client_socket.send (strng)
        #client_socket.close()

    if (choice == 2):
        data = client_socket.recv(1024)
        print "The following data was received - ",data
        print "Opening file - ",data
        fp = open(data,'r')
        strng = fp.read()
        #strng = str(fp)
        size = os.path.getsize(data)
        print size
        size = str(size)
        print size
        client_socket.send(size)
        client_socket.send (strng)
        #client_socket.close()

这是客户端脚本 -

And this is the client side script -

#!/usr/bin/python
# TCP client example
import socket,os
client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client_socket.connect(("", 5000))
k = ' '
size = 1024

while(1):
    print "Do you want to transfer a \n1.Text File\n2.Image\n3.Video\n"
    k = raw_input()
    client_socket.send(k)
    k = int (k)
    if(k == 1):
        print "Enter file name\n"
        strng = raw_input()
        client_socket.send(strng)
        size = client_socket.recv(1024)
        size = int(size)
        print "The file size is - ",size," bytes"
        size = size*2
        strng = client_socket.recv(size)
        print "\nThe contents of that file - "
        print strng

    if (k==2):
        print "Enter file name of the image with extentsion (example: filename.jpg,filename.png) - "
        fname = raw_input()
        client_socket.send(fname)
        size = client_socket.recv(1)
        print size
        #size = int(size)
        print "The file size is - ",size
        size = size*2
        strng = client_socket.recv(256456)
        print "\nThe file will be saved and opened- "
        fname = 'downloads/'+fname
        nf = open(fname,'w')
        nf.write(strng)
        nf.close()
        fname = 'viewnior '+ fname
        print fname
        os.system(fname)

我在Crunchbang Linux上编程 - 非官方Debian基于Distro
viewnior是图像查看器。

I am programming on Crunchbang Linux - Unofficial Debian based Distro viewnior is the image viewer.

推荐答案

我在我的系统上运行了相同的代码（Ubuntu 11.10），我发现将字符串发送大小有问题。当我插入逻辑来处理该部分时，它运行顺利。我也可以打开文件。
这就是我如何解决你的问题：
客户代码（client.py）的第一次更改是在接受大小并发送确认时： -

I ran the same code on my system (Ubuntu 11.10) and I found that, there is a problem with sending size as a string. When I inserted logic to handle that part, it ran smoothly. I could open the file also. This is how I could solve your problem : 1st change in client code(client.py) is while accepting size and sending acknowledgement about it :-

size = ' '
while(1):
   tmpsize = client_socket.recv(1)
   if tmpsize.isdigit() == True:
      print "Here : ",tmpsize
      size += tmpsize
   else:
      break

client_socket.send("received")

第二次更改是服务器端（server.py）代码，接受确认： -

2nd change is in server side(server.py) code, to accept acknowledgement :-

client_socket.send(size)
ack = client_socket.recv(1024)
if ack == "received":
   client_socket.send (strng)

我希望这可以帮助您解决问题。

I hope this will help you to solve your problem.

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