How to visualize the body part of a BaseHTTPRequestHandler

I'm writing a server in Python and I want to send some data in the body part of a GET request. Currently when I run my code it just freezes.

I tried to put it in a try/except and read details about the instance variable rfile but I didn't find anything helpful

Client-side :

import http.client
import sys  
import os

#get http server ip  
http_server = sys.argv[1]  
#create a connection  
conn = http.client.HTTPConnection(http_server)  

while 1:  
  cmd = input('input command (ex. GET index.html): ')  
  cmd = cmd.split()  

  f = open('data.txt')

  if cmd[0] == 'exit': #tipe exit to end it  
    break  

  #request command to server  
  conn.request(cmd[0],'',f.read())  

  #get response from server  
  rsp = conn.getresponse()  

  #print server response and data  
  print(rsp.status, rsp.reason)  
  data_received = rsp.read()  
  print(data_received)  

Server-side :

from http.server import BaseHTTPRequestHandler,HTTPServer
import os

class TestHTTPRequestHandler(BaseHTTPRequestHandler):
    def do_GET(self):
        a = ''
        fichier = open("data2.txt", "w")
        try:
            fichier.write(self.rfile.read())
        except:

        self.send_response(200)
        self.send_header('Content-type','text-html')
        self.end_headers()
        return


def run():
    print('http server is starting...')
    server_address = ('127.0.0.1',80)
    httpd = HTTPServer(server_address, PancakeHTTPRequestHandler)
    print('htttp server is running...')
    httpd.serve_forever()

if __name__ == '__main__':
    run()  

I expect being able to write my data from my GET request in my data2.txt file.

Thank you for your help

It freezes because of the self.rfile.read() in your server.py. The read method expect either EOF or a byte length to read. See https://docs.python.org/3/library/io.html#io.BufferedIOBase.read You're trying to log the client requests made to the server, a quick work around would be to pass the content length of the request to the read method with int(self.headers.get('Content-Length'))

In the end it gives us:

client.py

import http.client
import sys  
import os

#get http server ip  
http_server = sys.argv[1]  
#create a connection  
conn = http.client.HTTPConnection(http_server)  

while 1:  
  cmd = input('input command (ex. GET index.html): ')  
  cmd = cmd.split()

  f = open('data.txt')

  if cmd[0] == 'exit': #tipe exit to end it  
    break  

  #request command to server  
  conn.request(cmd[0], '', f.read())  

  #get response from server  
  rsp = conn.getresponse()  

  #print server response and data  
  print(rsp.status, rsp.reason)  
  data_received = rsp.read()  
  print(data_received)  

server.py

from http.server import BaseHTTPRequestHandler,HTTPServer
import os

class TestHTTPRequestHandler(BaseHTTPRequestHandler):
    def do_GET(self):
        a = ''
        fichier = open("data2.txt", "a")
        try:
            content_length = int(self.headers.get('Content-Length'))
            response_str = self.rfile.read(content_length)
            fichier.write(response_str.decode('utf-8'))
            self.send_response(200)
            self.send_header("Content-type", "text/html")
            self.end_headers()
        except:
            self.send_response(200)
            self.send_header('Content-type','text-html')
            self.end_headers()
        fichier.close()
        return


def run():
    print('http server is starting...')
    server_address = ('127.0.0.1',80)
    httpd = HTTPServer(server_address, TestHTTPRequestHandler)
    print('htttp server is running...')
    httpd.serve_forever()

if __name__ == '__main__':
    run()  

ps. I don't know what PancakeHTTPRequestHandler was so I replaced it with TestHTTPRequestHandler. And I also added a response in try except on the server side so that the the client gets a response otherwise it will crash.