# coding=utf-8
# httpclient.py Lab 3 -- HTTP client
# Team members: Name1 (username1), Name2 (username2)

# import the "socket" module -- not using "from socket import *" in order to selectively use items with "socket." prefix
import socket

# import the "regular expressions" module
import re


def main():
    # this resource request should result in "chunked" data transfer
    get_http_resource('http://seprof.sebern.com/', 'index.html')
    # this resource request should result in "Content-Length" data transfer
    get_http_resource('http://seprof.sebern.com/sebern1.jpg', 'sebern1.jpg')
    get_http_resource('http://seprof.sebern.com:8080/sebern1.jpg', 'sebern2.jpg')


# another resource to try for a little larger and more complex entity
#    get_http_resource('http://seprof.sebern.com/courses/cs2910-2014-2015/sched.md','sched-file.md')

# Get an HTTP resource from a server
#        Parse the URL and call function to actually make the request.
#        url -- full URL of the resource to get
#        file_name -- name of file in which to store the retrieved resource
# (do not modify this function)
def get_http_resource(url, file_name):
    # Parse the URL into its component parts using a regular expression.
    url_match = re.search('http://([^/:]*)(:\d*)?(/.*)', url)
    url_match_groups = url_match.groups() if url_match else []
    #    print 'url_match_groups=',url_match_groups
    if len(url_match_groups) == 3:
        host_name = url_match_groups[0]
        host_port = int(url_match_groups[1][1:]) if url_match_groups[1] else 80
        host_resource = url_match_groups[2]
        print('host name = {0}, port = {1}, resource = {2}'.format(host_name, host_port, host_resource))
        status_string = make_http_request(host_name.encode(), host_port, host_resource.encode(), file_name)
        print('get_http_resource: URL="{0}", status="{1}"'.format(url, status_string))
    else:
        print('get_http_resource: URL parse failed, request not sent')


# Get an HTTP resource from a server
#     host -- bytes object with the ASCII domain name or IP address of the server machine (i.e., host) to connect to
#     port -- integer port number to connect to on host
#     resource -- bytes object with the ASCII path/name of resource to get. This is everything in the URL after the domain name, including the
#                 first /.
#     file_name -- string (str) containing name of file in which to store the retrieved resource
#
# Returns the status code as an integer
def make_http_request(host, port, resource, file_name):
    return 500  # Replace this "server error" with the actual status code


main()