81 lines
2.0 KiB
JavaScript
81 lines
2.0 KiB
JavaScript
var layouts = require("../layouts"),
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mailer = require("nodemailer"),
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os = require('os');
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/**
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* SMTP Appender. Sends logging events using SMTP protocol.
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* It can either send an email on each event or group several logging events gathered during specified interval.
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*
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* @param config appender configuration data
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* @param layout a function that takes a logevent and returns a string (defaults to basicLayout).
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* all events are buffered and sent in one email during this time; if 0 than every event sends an email
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*/
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function smtpAppender(config, layout) {
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layout = layout || layouts.basicLayout;
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var subjectLayout = layouts.messagePassThroughLayout;
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var sendInterval = config.sendInterval*1000 || 0;
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var logEventBuffer = [];
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var sendTimer;
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function sendBuffer() {
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if (logEventBuffer.length == 0) {
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return;
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}
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var transport = mailer.createTransport(config.transport, config[config.transport]);
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var firstEvent = logEventBuffer[0];
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var body = "";
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while (logEventBuffer.length > 0) {
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body += layout(logEventBuffer.shift()) + "\n";
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}
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var msg = {
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to: config.recipients,
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subject: config.subject || subjectLayout(firstEvent),
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text: body,
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headers: {"Hostname": os.hostname()}
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};
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if (config.sender) {
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msg.from = config.sender;
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}
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transport.sendMail(msg, function(error, success) {
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if (error) {
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console.error("log4js.smtpAppender - Error happened ", error);
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}
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transport.close();
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});
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}
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function scheduleSend() {
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if (!sendTimer) {
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sendTimer = setTimeout(function() {
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sendTimer = null;
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sendBuffer();
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}, sendInterval);
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}
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}
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return function(loggingEvent) {
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logEventBuffer.push(loggingEvent);
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if (sendInterval > 0) {
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scheduleSend();
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} else {
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sendBuffer();
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}
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};
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}
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function configure(config) {
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var layout;
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if (config.layout) {
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layout = layouts.layout(config.layout.type, config.layout);
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}
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return smtpAppender(config, layout);
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}
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exports.name = "smtp";
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exports.appender = smtpAppender;
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exports.configure = configure;
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