url_encode and url_decode in Shell

之前写过一版 shell下解码url，下面给出另外一个版本

from https://gist.github.com/cdown/1163649

function urlencode() {

    local LANG=C

    for ((i=;i<${#};i++)); do

        if [[ ${:$i:} =~ ^[a-zA-Z0-\.\~\_\-]$ ]]; then

            printf "${1:$i:1}"

        else

            printf '%%%02X' "'${1:$i:1}"

        fi

    done

}

urldecode() {

    # urldecode <string>

    local url_encoded="${1//+/ }"

    printf '%b' "${url_encoded//%/\\x}"

}

好用就行