Escapes the keys and values of a key-value data string and making them compliant with RFC3986.

In other words, wasKeyValueURIEscape will percent-encode the keys and values whilst leaving the key-value separators untouched (=, &). This is useful in order to be able to send data without having to worry about collisions with reserved syntax elements.

When called with:

string data = "hello=world&good=day sir&life=good!";
wasKeyValueURIEscape($data);

the function will return the string:

hello=world&good=day%20sir&life=good%21

///////////////////////////////////////////////////////////////////////////
//    Copyright (C) 2014 Wizardry and Steamworks - License: CC BY 2.0    //
///////////////////////////////////////////////////////////////////////////
string wasKeyValueURIEscape(string data) {
    list i = llParseString2List(data, ["&", "="], []);
    list output = [];
    do {
        output += llEscapeURL(llList2String(i, 0)) + "=" + 
            llEscapeURL(llList2String(i, 1));
        i = llDeleteSubList(i, 0, 1);
    } while(llGetListLength(i) != 0);
    return llDumpList2String(output, "&");
}

###########################################################################
##  Copyright (C) Wizardry and Steamworks 2014 - License: CC BY 2.0      ##
###########################################################################
function wasKeyValueURIEscape($data) {
    preg_match_all("/(.+?)=(.+?)(&|$)/", $data, $match);
    $data = array_combine($match[1], $match[2]);
    array_walk($data,
        function(&$value, $key) {
            $value = rawurlencode($key)."=".rawurlencode($value);
        }
    );
    return implode('&', $data);
}

///////////////////////////////////////////////////////////////////////////
//  Copyright (C) Wizardry and Steamworks 2014 - License: CC BY 2.0      //
///////////////////////////////////////////////////////////////////////////
/// <summary>RFC3986 URI Escapes a string</summary>
/// <param name="data">a string to escape</param>
/// <returns>an RFC3986 escaped string</returns>
private static string wasUriEscapeDataString(string data)
{
    StringBuilder result = new StringBuilder();
    foreach (char c in data.Select(o => o))
    {
        if (char.IsLetter(c) || char.IsDigit(c))
        {
            result.Append(c);
            continue;
        }
        result.AppendFormat("%{0:X2}", (int) c);
    }
    return result.ToString();
}
 
///////////////////////////////////////////////////////////////////////////
//    Copyright (C) 2014 Wizardry and Steamworks - License: CC BY 2.0    //
///////////////////////////////////////////////////////////////////////////
/// <summary>Escapes a dictionary's keys and values for sending as POST data.</summary>
/// <param name="data">A dictionary containing keys and values to be escaped</param>
private static Dictionary<string, string> wasKeyValueURIEscape(Dictionary<string, string> data)
{
    Dictionary<string, string> output = new Dictionary<string, string>();
    foreach (KeyValuePair<string, string> tuple in data)
    {
        output.Add(wasUriEscapeDataString(tuple.Key), wasUriEscapeDataString(tuple.Value));
    }
    return output;
}