How to parse a URL

BASH

#!/bin/bash

# extract the protocol
proto="$(echo $1 | grep :// | sed -e's,^(.*://).*,1,g')"

# remove the protocol
url="$(echo ${1/$proto/})"

# extract the user (if any)
user="$(echo $url | grep @ | cut -d@ -f1)"

# extract the host and port
hostport="$(echo ${url/$user@/} | cut -d/ -f1)"

# by request host without port    
host="$(echo $hostport | sed -e 's,:.*,,g')"

# by request - try to extract the port
port="$(echo $hostport | sed -e 's,^.*:,:,g' -e 's,.*:([0-9]*).*,1,g' -e 's,[^0-9],,g')"

# extract the path (if any)
path="$(echo $url | grep / | cut -d/ -f2-)"

echo "url: $url"
echo "  proto: $proto"
echo "  user: $user"
echo "  host: $host"
echo "  port: $port"
echo "  path: $path"