51 lines
2.0 KiB
JavaScript
51 lines
2.0 KiB
JavaScript
/**
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* Copyright 2014 IBM Corp.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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module.exports = function(RED) {
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"use strict";
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function Base64Node(n) {
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RED.nodes.createNode(this,n);
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var node = this;
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this.on("input", function(msg) {
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if (msg.hasOwnProperty("payload")) {
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if (Buffer.isBuffer(msg.payload)) {
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// Take binary buffer and make into a base64 string
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msg.payload = msg.payload.toString('base64');
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node.send(msg);
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}
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else if (typeof msg.payload === "string") {
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// Take base64 string and make into binary buffer
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var regexp = new RegExp('^[A-Za-z0-9+\/=]*$');
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if ( regexp.test(msg.payload) && (msg.payload.length % 4 === 0) ) {
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msg.payload = new Buffer(msg.payload,'base64');
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node.send(msg);
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}
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else {
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node.log("Not a Base64 string - maybe we should encode it...");
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msg.payload = (new Buffer(msg.payload,"binary")).toString('base64');
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node.send(msg);
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}
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}
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else {
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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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});
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}
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RED.nodes.registerType("base64",Base64Node);
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}
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