42 lines
1.8 KiB
JavaScript
42 lines
1.8 KiB
JavaScript
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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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this.property = n.property||"payload";
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var node = this;
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this.on("input", function(msg) {
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var value = RED.util.getMessageProperty(msg,node.property);
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if (value !== undefined) {
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if (Buffer.isBuffer(value)) {
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// Take binary buffer and make into a base64 string
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value = value.toString('base64');
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RED.util.setMessageProperty(msg,node.property,value);
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node.send(msg);
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}
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else if (typeof value === "string") {
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// Take base64 string and make into binary buffer
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var load = value.replace(/\s+/g,''); // remove any whitespace
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var regexp = new RegExp('^[A-Za-z0-9+\/=]*$'); // check it only contains valid characters
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if ( regexp.test(load) && (load.length % 4 === 0) ) {
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value = new Buffer(load,'base64');
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RED.util.setMessageProperty(msg,node.property,value);
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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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value = (new Buffer(value,"binary")).toString('base64');
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RED.util.setMessageProperty(msg,node.property,value);
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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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}
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else { node.warn("No property 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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