active_proxy.sh

#!/bin/bash

deactive_proxy () {
    if [ ! "$1" = "nondestructive"   ] ; then
        unset -f deactive_proxy
        if [ -n "$_OLD_HTTP_PROXY"  ] ; then
           http_proxy="$_OLD_HTTP_PROXY"
           export http_proxy
           unset _OLD_HTTP_PROXY
        else
           unset http_proxy
        fi

        if [ -n "$_OLD_HTTPS_PROXY"  ] ; then
           https_proxy="$_OLD_HTTPS_PROXY"
           export https_proxy
           unset _OLD_HTTPS_PROXY
        else
           unset https_proxy
        fi
    fi
}

deactive_proxy nondestructive

if [ -n "$http_proxy"  ] ; then
    _OLD_HTTP_PROXY="$http_proxy"
    export _OLD_HTTP_PROXY
    unset http_proxy
fi

if [ -n "$https_proxy"  ] ; then
    _OLD_HTTPS_PROXY="$https_proxy"
    export _OLD_HTTPS_PROXY
    unset https_proxy
fi

port="1090"
host="192.168.0.103"
http_proxy=http://${host}:${port}
https_proxy=http://${host}:${port}

export http_proxy
export https_proxy

active proxy

source active_proxy.sh

deactive proxy

deactive_proxy