61 lines
1.9 KiB
JavaScript
61 lines
1.9 KiB
JavaScript
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module.exports = function(RED) {
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"use strict";
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var fs = require('fs');
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var Tail = require('tail').Tail;
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function TailNode(n) {
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RED.nodes.createNode(this,n);
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this.filename = n.filename;
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this.filetype = n.filetype || "text";
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this.split = new RegExp(n.split || "[\r]{0,1}\n");
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var node = this;
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var fileTail = function() {
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if (fs.existsSync(node.filename)) {
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if (node.filetype === "text") {
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node.tail = new Tail(node.filename,{separator:node.split, flushAtEOF:true});
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}
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else {
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node.tail = new Tail(node.filename,{separator:null, flushAtEOF:true, encoding:"binary"});
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}
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node.tail.on("line", function(data) {
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if (data.length > 0) {
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var msg = { topic:node.filename };
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if (node.filetype === "text") {
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msg.payload = data.toString();
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node.send(msg);
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}
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else {
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msg.payload = Buffer.from(data,"binary");
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//msg.payload = data;
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node.send(msg);
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}
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}
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});
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node.tail.on("error", function(err) {
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node.error(err.toString());
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});
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}
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else {
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node.tout = setTimeout(function() { fileTail(); },10000);
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node.warn(RED._("tail.errors.filenotfound") + node.filename);
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}
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}
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fileTail();
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node.on("close", function() {
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/* istanbul ignore else */
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if (node.tail) { node.tail.unwatch(); }
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delete node.tail;
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if (node.tout) { clearTimeout(node.tout); }
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});
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}
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RED.nodes.registerType("tail",TailNode);
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}
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