inceptum/dist/web/WebPlugin.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const e = require("express");
const onFinished = require("on-finished");
const prometheus_extended_gauge_1 = require("prometheus-extended-gauge");
const promBundle = require("express-prom-bundle");
const xmlparser = require("express-xml-bodyparser");
const BaseSingletonDefinition_1 = require("../ioc/objectdefinition/BaseSingletonDefinition");
const NewrelicUtil_1 = require("../newrelic/NewrelicUtil");
const LogManager_1 = require("../log/LogManager");
const WebRoutingInspector_1 = require("./WebRoutingInspector");
const HttpError_1 = require("./HttpError");
const ContentNegotiationMiddleware_1 = require("./ContentNegotiationMiddleware");
const logger = LogManager_1.LogManager.getLogger(__filename);
const activeRequestsGauge = new prometheus_extended_gauge_1.ExtendedGauge({
    max: true,
    min: false,
    average: true,
    bucketSizeMillis: 1000,
    numBuckets: 60,
    help: 'Number of active http requests being processed',
    name: 'http_active_requests',
});
class RouteRegisterUtil {
    constructor() {
        this.routesToRegister = [];
    }
    doRegister() {
        this.routesToRegister.forEach((route) => {
            logger.info(`Registering route from ${route.objectName}: ${route.verb.toUpperCase()} ${route.path} -> ${route.methodName}`);
            this.express[route.verb](route.path, (req, res) => {
                return this[route.instanceProperty][route.methodName](req, res);
            });
        });
    }
}
exports.RouteRegisterUtil = RouteRegisterUtil;
/**
 * Client errors do not need to be sent to NewRelic so create clientErrorMiddleware
 * to send response if the error is 4xx. clientErrorMiddleware needs to be registered
 * before errorMiddleware.
 * @param err
 * @param req
 * @param res
 * @param next
 */
exports.clientErrorMiddleware = (err, req, res, next) => {
    let more = [];
    if (err instanceof HttpError_1.default && err.statusCode && err.statusCode >= 400 && err.statusCode < 500) {
        res.status(err.getStatusCode()).send({ message: err.message });
    }
    else if (err.failedValidation) {
        more = err.results && err.results.errors;
        res.status(400).send({ message: err.message });
    }
    else {
        return next(err); // Give back to express to handle
    }
    logger.error({ err, more }); // log 4xx errors and swagger errors
};
exports.errorMiddleware = (err, req, res, next) => {
    if (res.headersSent) {
        return next(err); // Give back to express to handle
    }
    logger.error(err);
    const data = { message: err.message };
    if (err instanceof HttpError_1.default && err.statusCode) {
        if (err.statusCode >= 500) {
            NewrelicUtil_1.NewrelicUtil.noticeError(err);
        }
        res.status(err.getStatusCode()).send(data);
    }
    else {
        NewrelicUtil_1.NewrelicUtil.noticeError(err);
        res.status(500).send(data);
    }
};
class WebPlugin {
    // private expressProvider = () => new e();
    constructor(options = {}) {
        this.options = options;
        this.name = 'WebPlugin';
    }
    willStart(app, pluginContext) {
        const express = e();
        express.set('trust proxy', true); // stop redirecting to http internally https://expressjs.com/en/guide/behind-proxies.html
        pluginContext.set(WebPlugin.CONTEXT_APP_KEY, express);
        const context = app.getContext();
        express.use(promBundle({
            includeMethod: true,
            buckets: [0.003, 0.03, 0.1, 0.3, 0.5, 1.5, 10],
            autoregister: false,
        }));
        // Add middleware for stats on active requests
        express.use((req, res, next) => {
            activeRequestsGauge.inc();
            onFinished(res, () => activeRequestsGauge.dec());
            next();
        });
        this.registerXmlBodyParser(express);
        this.registerXmlContentNegotiationMiddleware(express, app.getConfig('app.xmlRoot', ''));
        // move from didStart to willStart
        express.use(e.json({ limit: app.getConfig('app.server.maxRequestSize', '10mb') }));
        express.use(e.urlencoded({ extended: true, limit: app.getConfig('app.server.maxRequestSize', '10mb') }));
        if (this.options && this.options.staticRoots) {
            this.options.staticRoots.forEach((root) => {
                express.use(e.static(root));
            });
        }
        const definition = new BaseSingletonDefinition_1.BaseSingletonDefinition(RouteRegisterUtil);
        definition.withLazyLoading(false);
        definition.startFunction('doRegister');
        definition.setPropertyByValue('express', express);
        context.registerDefinition(definition);
        context.addObjectDefinitionInspector(new WebRoutingInspector_1.WebRoutingInspector(definition));
    }
    didStart(app, pluginContext) {
        const express = pluginContext.get(WebPlugin.CONTEXT_APP_KEY);
        const port = app.getConfig('app.server.port', 10010);
        express.use(exports.clientErrorMiddleware);
        // Add error handling middleware as the final middleware.
        express.use(exports.errorMiddleware);
        // Start the server
        const server = express.listen(port, () => {
            app.logger.info(`Server started at http://localhost:${port}`);
        });
        pluginContext.set(WebPlugin.CONTEXT_SERVER_KEY, server);
    }
    didStop(app, pluginContext) {
        const express = pluginContext.get(WebPlugin.CONTEXT_SERVER_KEY);
        app.logger.info('Shutting down server');
        if (express) {
            express.close();
        }
    }
    registerXmlBodyParser(express) {
        if (this.options && this.options.xmlBodyParserOptions) {
            express.use(xmlparser(this.options.xmlBodyParserOptions));
        }
    }
    registerXmlContentNegotiationMiddleware(express, xmlRoot) {
        const negoContentMiddleware = new ContentNegotiationMiddleware_1.ContentNegotiationMiddleware(xmlRoot);
        const xmlMiddleware = negoContentMiddleware.getMiddleware();
        if (xmlMiddleware) {
            express.use(xmlMiddleware);
        }
    }
}
WebPlugin.CONTEXT_APP_KEY = 'WebPlugin/APP';
WebPlugin.CONTEXT_SERVER_KEY = 'WebPlugin/SERVER';
exports.default = WebPlugin;
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