filebeat-logger/src/transport.js

A winston logger that prints json lines in elastic common schema format

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Transport = void 0;
const WinstonTransport = require("winston-transport");
const winston_1 = require("winston");
const utils_1 = require("./utils");
const options_1 = require("./options");
class Transport extends WinstonTransport {
    constructor(optOptions) {
        super();
        const options = { ...(0, options_1.optionDefaults)(), ...optOptions };
        this.stderrLevels = options.stderrLevels;
        this.format = (0, winston_1.format)(function (info) {
            if (options.printTimestamp) {
                utils_1.Utils.addTimestamp(info);
            }
            utils_1.Utils.addLogLevel(info);
            utils_1.Utils.addEnvironmentTag(info, options.appEnvironment);
            utils_1.Utils.expandError(info);
            utils_1.Utils.expandRequest(info);
            utils_1.Utils.expandResponse(info);
            utils_1.Utils.explodeJsonInMessage(info);
            utils_1.Utils.orderKeys(info, options.keysOrder);
            return info;
        })();
    }
    log(info, next) {
        const stream = this.stderrLevels.includes(info["log.level"]) ? process.stderr : process.stdout;
        stream.write(JSON.stringify(info) + "\n");
        next();
    }
}
exports.Transport = Transport;
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