Sending http headers with python

python html sockets client

26,212

The response header should include a response code indicating success. Before the Content-Type line, add:

client.send('HTTP/1.0 200 OK\r\n')

Also, to make the test more visible, put some content in the page:

client.send('<html><body><h1>Hello World</body></html>')

After the response is sent, close the connection with:

client.close()

and

sock.close()

As the other posters have noted, terminate each line with \r\n instead of \n.

Will those additions, I was able to run successful test. In the browser, I entered localhost:8080.

Here's all the code:

import socket

sock = socket.socket()
sock.bind(('', 8080))
sock.listen(5)
client, adress = sock.accept()

print "Incoming:", adress
print client.recv(1024)
print

client.send('HTTP/1.0 200 OK\r\n')
client.send("Content-Type: text/html\r\n\r\n")
client.send('<html><body><h1>Hello World</body></html>')
client.close()

print "Answering ..."
print "Finished."

sock.close()

26,212

Author by

Niklas R

Updated on July 09, 2022

Comments

Niklas R almost 2 years

I've set up a little script that should feed a client with html.

import socket

sock = socket.socket()
sock.bind(('', 8080))
sock.listen(5)
client, adress = sock.accept()


print "Incoming:", adress
print client.recv(1024)
print

client.send("Content-Type: text/html\n\n")
client.send('<html><body></body></html>')

print "Answering ..."
print "Finished."

import os
os.system("pause")

But it is shown as plain text in the browser. Can you please tell what I need to do ? I just can't find something in google that helps me..

Thanks.

werewindle over 12 years

... and don't forget to replace \n\n to \r\n\r\n, since HTTP needs CRLF to be send after headers.
dmitry over 12 years

and better to use '\r\n\r\n' instead of '\n\n'
Niklas R over 12 years

Wow, thats it. Thank you ! Are there any related documents about the exchange between server and client with the http protocol ?
Raymond Hettinger over 12 years

@NiklasR You can start with an overview on wikipedia en.wikipedia.org/wiki/Hypertext_Transfer_Protocol and then get the details at w3.org/Protocols/rfc2616/rfc2616.html
Gary Gauh about 11 years

@RaymondHettinger,I was wondering how the browser could recognize the end of http response body without Content-Length in the http response header
Raymond Hettinger about 11 years

@GaryGauh Content-Length is necessary if you leave the connection open. But if you close the connection as we do above, the browser can interpret "hanging-up the phone" as the "there is no more content coming".
Martin Geisler over 9 years

Note that webob uses \n to separate lines instead of the correct \r\n. This is #146. Browsers don't seem to care, though, so your solution will work fine in most cases.