Pure Bash Implementation of URL Decode

gistfile1.sh

stripEncodedLineEndings() {
    # stripEncodedLineEndings <string>

	local stripFirstPart="${1//%0D}"
	echo "${stripFirstPart//%0A}"
}

urlencode() {
    # urlencode <string>

    local length="${#1}"
    for (( i = 0; i < length; i++ )); do
        local c="${1:i:1}"
        case $c in
            [a-zA-Z0-9.~_-]) printf "$c" ;;
            *) printf '%%%02X' "'$c"
        esac
    done
}

urldecode() {
    # urldecode <string>

    local stripedOfLineTerminators=$(stripEncodedLineEndings $1)
    local url_encoded="${stripedOfLineTerminators//+/ }"
    printf '%b' "${url_encoded//%/\x}"
}

The Gist that this was forked from failed to output a correct urldecoded string if the input string contained encoded line terminators. This solves the problem by removing line terminators from the encoded string before decoding.