77 lines
2.1 KiB
JavaScript
77 lines
2.1 KiB
JavaScript
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const streams = require('streamroller');
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const os = require('os');
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const eol = os.EOL;
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function openTheStream(filename, pattern, options) {
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const stream = new streams.DateRollingFileStream(filename, pattern, options);
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stream.on('error', (err) => {
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// eslint-disable-next-line no-console
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console.error(
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'log4js.dateFileAppender - Writing to file %s, error happened ',
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filename,
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err
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);
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});
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stream.on('drain', () => {
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process.emit('log4js:pause', false);
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});
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return stream;
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}
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/**
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* File appender that rolls files according to a date pattern.
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* @param filename base filename.
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* @param pattern the format that will be added to the end of filename when rolling,
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* also used to check when to roll files - defaults to '.yyyy-MM-dd'
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* @param layout layout function for log messages - defaults to basicLayout
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* @param options - options to be passed to the underlying stream
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* @param timezoneOffset - optional timezone offset in minutes (default system local)
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*/
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function appender(filename, pattern, layout, options, timezoneOffset) {
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// the options for file appender use maxLogSize, but the docs say any file appender
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// options should work for dateFile as well.
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options.maxSize = options.maxLogSize;
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const writer = openTheStream(filename, pattern, options);
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const app = function (logEvent) {
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if (!writer.writable) {
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return;
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}
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if (!writer.write(layout(logEvent, timezoneOffset) + eol, 'utf8')) {
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process.emit('log4js:pause', true);
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}
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};
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app.shutdown = function (complete) {
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writer.end('', 'utf-8', complete);
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};
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return app;
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}
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function configure(config, layouts) {
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let layout = layouts.basicLayout;
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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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if (!config.alwaysIncludePattern) {
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config.alwaysIncludePattern = false;
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}
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// security default (instead of relying on streamroller default)
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config.mode = config.mode || 0o600;
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return appender(
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config.filename,
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config.pattern,
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layout,
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config,
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config.timezoneOffset
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);
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}
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module.exports.configure = configure;
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