proxy.sh

#!/bin/bash
# The MIT License (MIT)
#
# Copyright (c) 2016 Tiberio A. Santos
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of
# this software and associated documentation files (the "Software"), to deal in
# the Software without restriction, including without limitation the rights to
# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
# the Software, and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
# FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.


# Function for proxy configuration on a linux shell
## Additional notes ##
# Include the following line on your ~/.bashrc or ~/.zshrc
# source /path/to/script/proxy.sh
# For keep sudo working  after use this function, insert the following line in your /etc/sudoers:
# Defaults        env_keep += "ftp_proxy http_proxy https_proxy"

green=$(tput setaf 2)
normal=$(tput sgr0)

#from https://gist.github.com/cdown/1163649
function qurl() {
    local LANG=C
    for ((i=0;i<${#1};i++)); do
        if [[ ${1:$i:1} =~ ^[a-zA-Z0-9\.\~\_\-]$ ]]; then
            printf "${1:$i:1}"
        else
            printf '%%%02X' "'${1:$i:1}"
        fi
    done
}

function proxy_on() {
  server="192.168.0.1:3128"
  printf "username: "
  read username
  printf "password: "
  read -s password

  username=$(qurl $username)
  password=$(qurl $password)

  export {http,https,ftp,rsync}_proxy="http://$username:$password@$server/"
  export no_proxy="localhost,127.0.0.1"
  printf "\n\n%s\n" "[  ${green}OK${normal}  ] Proxy enabled."
}

function proxy_off() {
  unset {http,https,ftp,rsync}_proxy
  printf "\n\n%s\n" "[  ${green}OK${normal}  ] Proxy disabled."
}