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node-red-nodes/parsers/base64/70-base64.js

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module.exports = function(RED) {
"use strict";
function Base64Node(n) {
RED.nodes.createNode(this,n);
var node = this;
this.on("input", function(msg) {
if (msg.hasOwnProperty("payload")) {
if (Buffer.isBuffer(msg.payload)) {
// Take binary buffer and make into a base64 string
msg.payload = msg.payload.toString('base64');
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node.send(msg);
}
else if (typeof msg.payload === "string") {
// Take base64 string and make into binary buffer
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var load = msg.payload.replace(/\s+/g,''); // remove any whitespace
var regexp = new RegExp('^[A-Za-z0-9+\/=]*$'); // check it only contains valid characters
if ( regexp.test(load) && (load.length % 4 === 0) ) {
msg.payload = new Buffer(load,'base64');
node.send(msg);
}
else {
//node.log("Not a Base64 string - maybe we should encode it...");
msg.payload = (new Buffer(msg.payload,"binary")).toString('base64');
node.send(msg);
}
}
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else {
node.warn("This node only handles strings or buffers.");
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}
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}
else { node.warn("No payload found to process"); }
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});
}
RED.nodes.registerType("base64",Base64Node);
}