#!/bin/bash

# Usage check
if [ $# -ne 1 ]; then
    echo "Usage: $0 <URL>"
    exit 1
fi

# Extract the protocol, hostname, port, and path from the URL
url=$1
protocol="${url%%://*}"
host_port="${url#*://}"
host="${host_port%%/*}"
path="/${host_port#*/}"
port=80

# Check if the protocol is HTTP
if [ "$protocol" != "http" ]; then
    echo "Only HTTP protocol is supported."
    exit 1
fi

# Check if a port is specified
if [[ $host == *:* ]]; then
    IFS=':' read -ra ADDR <<< "$host"
    host=${ADDR[0]}
    port=${ADDR[1]}
fi

# Open connection to the host
exec 3<>/dev/tcp/$host/$port

# Send HTTP GET request
echo -e "GET $path HTTP/1.1\r\nHost: $host\r\nConnection: close\r\n\r\n" >&3

# Read the response and output the file content
{
    # Skip HTTP headers
    while IFS= read -r line; do
        [[ $line == $'\r' ]] && break
    done

    # Output the body (file content)
    cat >&1
} <&3

# Close the connection
exec 3<&-