109 lines
2.7 KiB
JavaScript
109 lines
2.7 KiB
JavaScript
"use strict";
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var layouts = require("../layouts")
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, mailer = require("nodemailer")
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, os = require('os')
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, unsentCount = 0
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, shutdownTimeout;
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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
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* logging events gathered during specified interval.
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*
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* @param config appender configuration data
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* config.sendInterval time between log emails (in seconds), if 0
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* then every event sends an email
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* config.shutdownTimeout time to give up remaining emails (in seconds; defaults to 5).
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* @param layout a function that takes a logevent and returns a string (defaults to basicLayout).
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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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shutdownTimeout = ('shutdownTimeout' in config ? config.shutdownTimeout : 5) * 1000;
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function sendBuffer() {
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if (logEventBuffer.length > 0) {
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var transport = mailer.createTransport(config.SMTP);
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var firstEvent = logEventBuffer[0];
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var body = "";
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var count = logEventBuffer.length;
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while (logEventBuffer.length > 0) {
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body += layout(logEventBuffer.shift(), config.timezoneOffset) + "\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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headers: { "Hostname": os.hostname() }
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};
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if (!config.html) {
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msg.text = body;
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} else {
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msg.html = body;
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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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unsentCount -= count;
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});
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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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unsentCount++;
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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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function shutdown(cb) {
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if (shutdownTimeout > 0) {
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setTimeout(function() { unsentCount = 0; }, shutdownTimeout);
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}
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async.whilst(function() {
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return unsentCount > 0;
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}, function(done) {
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setTimeout(done, 100);
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}, cb);
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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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exports.shutdown = shutdown;
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