#!/bin/bash
# Author: see http://bashcurescancer.com/improve-this-script-win-100-dollars.html
# Improve and send to me

function httpClient()
{

	URL=$1
	if [ $# -ne 1 ]
	then
		echo "Usage: `basename $0` url"
		exit 1
	elif echo $URL | egrep -q '^http://'								# url must start with http
	then
		oldIFS=$IFS
		IFS=/
		set -- $URL
		HOST=$3											# Get the host
		RESOURCE=""
		shift 3
		while [ $# -gt 0 ]
		do
			RESOURCE="$RESOURCE/$1"								# Get the resouce
			shift
		done
		IFS=$oldIFS
		if [ -z $RESOURCE ] || echo $URL | egrep -q '/$'					# If empty or url ends in /, add /
		then
			RESOURCE="$RESOURCE/"
		fi
		exit
		if ! ping -c 1 -q $HOST 2>&1 >/dev/null							# Make sure its on the network. What if not
													# accepting pings? Maybe we don't even care.
													# Not sure how bash responds when the host 
													# is not reachable
		then
			echo "$HOST not found"
			exit 1
		fi
	else
		echo "$URL not a valid URL. Must start with http://"
		exit 1
	fi
	exec 3<> /dev/tcp/$HOST/80		# Open connection
	echo "GET $RESOURCE HTTP/1.1" 1>&3	# Request resource, only care about gets.
	echo "host: $HOST" 1>&3			# Send host header, what about encoding?
	echo 1>&3				# End request
	BODY=1					# Headers are done flag
	HEADERS=""				# Store headers, maybe use later
	TIMEOUT=30				# After initial connection we will only wait 1 second for timeout
	while true
	do
		read -u 3 -t $TIMEOUT REPLY || break	# read from server or be done with it
		LINE=$( echo $REPLY | tr -d '\r' )	# Eliminate \r, we are using UNIX
		if [ $BODY -eq 0 ]
		then
			echo "$LINE"			# If after headers, print
		elif echo $LINE | egrep -q '^$'
		then
			BODY=0				# End of headers
			TIMEOUT=1			# Read takes a long to die after the connection is done, make
							# it timeout after 1 second after the server is giving us data
		else
			HEADERS="$HEADERS\n$LINE"	# Save headers, for no reason
		fi
	done
	exec 3<&-
}

httpClient $*