python socket client program 2(Get request)

Question

Thanks all for solving my first question.But there is a final problem.

#import socket module
import sys
import httplib
from socket import *
serverName = sys.argv[1]
serverPort = int(sys.argv[2])
filename = sys.argv[3] 
clientSocket = socket(AF_INET,SOCK_STREAM)
clientSocket.connect((serverName,serverPort))
clientSocket.send("GET /filename")
while True:
 data = clientSocket.recv(1024)
 if not data:
 break
 print data,filename
clientSocket.close()

FInally, i can't receive the content with the certain filname.I think the point is in "/" How can i solve it??

• Robᵩ: What do you receive?

Answer 1

Have you tried using the python requests package?

Either way, you have a problem here:

clientSocket.send("GET /filename")

Should (at the very least) be:

clientSocket.send("GET /%s" % filename)

When you write filename inside the string, it will not evaluate that to the variable filename instead, you need to use string formatting

Answer 2

Is this program communicate with HTTP server?

Then, it should send CR+LF twice to correctly denote the end of HTTP header.

clientSocket.send("GET /{}\r\n\r\n".format(filename))

• user2877854: I am connected to socket server.But can u tell more about \r\n\r\n? It is about the knowlege of http potocol?
• falsetru: @user2877854, \r\n\r\n is there to separate http header from http body. w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.1