Solved: Javascript Btoa - Page 2

Report Inappropriate Content · 05-31-2016 11:11 AM

Hi,

I am trying to use btoa JavaScript function for encodindg base64 and

getting an Error "ReferenceError: "btoa".

Is there any workaround to use "Btoa" or any other encoder i can use for Base64 encoding.

I am failing to Encode special Characters in apigee.

Would really appriciate any help.

Thanks

anilsr

@gautam1 ,

Try below code, it should work. I have tested same & it works for me in Apigee Edge Proxy,

var Base64 = {




    _keyStr: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",




    encode: function(input) {
        var output = "";
        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
        var i = 0;


        input = Base64._utf8_encode(input);


        while (i < input.length) {


            chr1 = input.charCodeAt(i++);
            chr2 = input.charCodeAt(i++);
            chr3 = input.charCodeAt(i++);


            enc1 = chr1 >> 2;
            enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
            enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
            enc4 = chr3 & 63;


            if (isNaN(chr2)) {
                enc3 = enc4 = 64;
            } else if (isNaN(chr3)) {
                enc4 = 64;
            }


            output = output + this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) + this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);


        }


        return output;
    },




    decode: function(input) {
        var output = "";
        var chr1, chr2, chr3;
        var enc1, enc2, enc3, enc4;
        var i = 0;


        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");


        while (i < input.length) {


            enc1 = this._keyStr.indexOf(input.charAt(i++));
            enc2 = this._keyStr.indexOf(input.charAt(i++));
            enc3 = this._keyStr.indexOf(input.charAt(i++));
            enc4 = this._keyStr.indexOf(input.charAt(i++));


            chr1 = (enc1 << 2) | (enc2 >> 4);
            chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
            chr3 = ((enc3 & 3) << 6) | enc4;


            output = output + String.fromCharCode(chr1);


            if (enc3 != 64) {
                output = output + String.fromCharCode(chr2);
            }
            if (enc4 != 64) {
                output = output + String.fromCharCode(chr3);
            }


        }


        output = Base64._utf8_decode(output);


        return output;


    },


    _utf8_encode: function(string) {
        string = string.replace(/\r\n/g, "\n");
        var utftext = "";


        for (var n = 0; n < string.length; n++) {


            var c = string.charCodeAt(n);


            if (c < 128) {
                utftext += String.fromCharCode(c);
            }
            else if ((c > 127) && (c < 2048)) {
                utftext += String.fromCharCode((c >> 6) | 192);
                utftext += String.fromCharCode((c & 63) | 128);
            }
            else {
                utftext += String.fromCharCode((c >> 12) | 224);
                utftext += String.fromCharCode(((c >> 6) & 63) | 128);
                utftext += String.fromCharCode((c & 63) | 128);
            }


        }


        return utftext;
    },


    _utf8_decode: function(utftext) {
        var string = "";
        var i = 0;
        var c = c1 = c2 = 0;


        while (i < utftext.length) {


            c = utftext.charCodeAt(i);


            if (c < 128) {
                string += String.fromCharCode(c);
                i++;
            }
            else if ((c > 191) && (c < 224)) {
                c2 = utftext.charCodeAt(i + 1);
                string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
                i += 2;
            }
            else {
                c2 = utftext.charCodeAt(i + 1);
                c3 = utftext.charCodeAt(i + 2);
                string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
                i += 3;
            }


        }


        return string;
    }


}
    
var origString  = "HelloWorld";    
var encodedString = Base64.encode(origString);
var decodedString = Base64.decode(encodedString);


print(origString);    
print(encodedString);
print(decodedString);

If you are interested, Here is the python based solution too... Keep us posted.

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