[ghostheadx9]

Here is my code:

Code:

import sys, socket try: rfc_number = int(sys.argv[1]) except (IndexError, ValueError): print('Must supply an RFC number as first argument') sys.exit(2) host = 'www.ietf.org' port = 80 sock = socket.create_connection((host, port)) req = ( 'GET/rfc/rfc{rfcnum}.txt HTTP/1.1\r\n', 'Host: {host}:{port}\r\n', 'User-Agent: Python {version}\r\n', 'Connection: close\r\n', '\r\n' ) req = req.format( rfcnum=rfc_number, host=host, port=port, version=sys.version.info[0] ) sock.sendall(req.encode('ascii')) rfc_raw = bytearray() while True: buf = sock.recv(4096) if not len(buf): break rfc_raw += buf rfc = rfc_raw.decode('utf-8') print(rfc)

Could someone help me:

1. figure out what's causing the syntax error:

Code:

adam@adam-Inspiron-5558:~/.PyCharmCE2018.2/config/scratches$ python firstTCP_program.py 782 Traceback (most recent call last): File "firstTCP_program.py", line 21, in <module> req = req.format( AttributeError: 'tuple' object has no attribute 'format'

2. understand my own code better? I really want to understand the code better so that I can reprogram it differently.

Thanks so much.

Best,

ghostheadx9

[griimnak]

Code:

req = (    'GET/rfc/rfc{rfcnum}.txt HTTP/1.1\r\n',    'Host: {host}:{port}\r\n',    'User-Agent: Python {version}\r\n',    'Connection: close\r\n',    '\r\n' ) req = req.format(    rfcnum=rfc_number,    host=host,    port=port,    version=sys.version.info[0] )

The problem is with your req object.
.format() only works on single strings, req is a tuple because you used "," in between strings.

This should work for you:

Code:

""" This is just dummy data for my test, delete this. """ rfcnum = "/blahblah" host = "test" port = 80 version = "testtest" """ Take this req object and plug in your data here""" req= ''' GET/rfc/rfc{}.txt HTTP/1.1 Host: {}:{} User-Agent: Python {} Connection: close '''.format(rfcnum, host, port, version) """Just for my test, you can remove this.""" print(req)

Output:

Code:

C:\Users\griimnak\Desktop>py -2 test.py GET/rfc/rfc/blahblah.txt HTTP/1.1 Host: test:80 User-Agent: Python testtest Connection: close C:\Users\griimnak\Desktop>