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import express from 'express';
import i18n from 'i18n';
import createError from 'http-errors';
import {
cacheGetProjectBugsUrl,
cacheGetProjectHomepage,
cacheGetProjectMetadata,
cacheGetVersion
} from "../lib/MemoryCache.js";
import {unauthorized} from "../lib/CommonApi.js";
import {generateErrorId} from "../lib/Common.js";
import {StatusCodes} from "http-status-codes";
import ApplicationConfig from "../config/ApplicationConfig.js";
const __dirname = path.resolve();
const wwwPath = path.join(__dirname, './src/www');
const BES_ISSUES = cacheGetProjectBugsUrl();
const HEALTH_ENDPOINT = '/health';
const UNAUTHORIZED_FRIENDLY = "Le milieu autorisé c'est un truc, vous y êtes pas vous hein !";// (c) Coluche
export default class ExpressServer {
constructor(services) {
const {
config, loggerService, blueskyService,
botService, newsService,
auditLogsService, summaryService, inactivityDetector
} = services;
this.config = config;
this.blueskyService = blueskyService;
this.botService = botService;
this.newsService = newsService;
this.auditLogsService = auditLogsService;
this.summaryService = summaryService;
this.inactivityDetector = inactivityDetector;
this.logger = loggerService.getLogger().child({label: 'ExpressServer'});
this.port = config.port;
this.tokenSimulation = config.bot.tokenSimulation;
this.tokenAction = config.bot.tokenAction;
this.version = cacheGetVersion();
this.logger.debug("build", this.version);
this.sendAutditLogs = auditLogsService.notifyLogs.bind(auditLogsService);
}
async init() {
const expressServer = this;
expressServer.logger.debug("init()");
// doc: https://github.com/mashpie/i18n-node
// as singleton // https://github.com/mashpie/i18n-node?tab=readme-ov-file#as-singleton
i18n.configure({
locales: ['fr', 'en'],
directory: path.join(__dirname, 'src','locales'),
defaultLocale: 'en',
queryParameter: 'lang',// query parameter to switch locale (ie. /home?lang=ch) - defaults to NULL
cookie: 'lang'
});
expressServer.app = express();
expressServer.app.use(express.static(path.join(wwwPath, './public')));
expressServer.app.use(expressServer.handleActivityTic.bind(this));
expressServer.app.use(expressServer.i18n.bind(this));
expressServer.app.set('views', path.join(wwwPath, './views'));
expressServer.app.set('view engine', 'ejs');
expressServer.app.get('/api/about', expressServer.aboutResponse.bind(this));
expressServer.app.get('/api/hook', expressServer.hookResponse.bind(this));
expressServer.app.get(HEALTH_ENDPOINT, (req, res) => res.status(200));
expressServer.app.get('/*', expressServer.webPagesResponse.bind(this));// default
expressServer.app.use((req, res, next) => next(createError(404)));// catch 404 and forward to error handler
expressServer.app.use(expressServer.errorHandlerMiddleware.bind(this));// error handler
// build initial cache
await this.summaryService.cacheGetWeekSummary({})
// register inactivity listener
this.inactivityDetector.registerOnInactivityListener(
async () => {
await ApplicationConfig.sendAuditLogs();
}
)
expressServer.listeningServer = await expressServer.app.listen(expressServer.port);
expressServer.logger.info(`Bot ${expressServer.version} listening on ${expressServer.port} with health on ${HEALTH_ENDPOINT}`);
return expressServer.listeningServer;
}
getRemoteAddress(request) {
return request.headers['x-forwarded-for'] ?
request.headers['x-forwarded-for']
: request.connection?.remoteAddress
|| "???";
}
handleActivityTic(req, res, next) {
this.inactivityDetector.activityTic();
next();
}
i18n(req, res, next) {
i18n.init(req, res);
return next();
}
aboutResponse(req, res) {
const {version} = this;
res.json({version});
}
/**
* trigger bot action
* @param req
* @param res cron job minimal response payload
* @returns {Promise<void>}
*/
async hookResponse(req, res) {
const expressServer = this;
try {
const currentLocale = i18n.getLocale();
const remoteAddress = expressServer.getRemoteAddress(req);
const apiToken = req.get('API-TOKEN');
const pluginName = req.get('PLUGIN-NAME');
const doSimulate = expressServer.tokenSimulation && apiToken === expressServer.tokenSimulation;
expressServer.context = {currentLocale, remoteAddress, pluginName, doSimulate};
let doAction = !doSimulate && expressServer.tokenAction && apiToken === expressServer.tokenAction;
if ("simulateError" === pluginName) {
throw new Error("simulateError");
}
if (doSimulate || doAction) {
await expressServer.botService.process(remoteAddress, doSimulate, pluginName);
res.status(200).json({success: true});
} else {
this.logger.debug(StatusCodes.UNAUTHORIZED, JSON.stringify({code: 401, doSimulate, doAction}));
unauthorized(res, UNAUTHORIZED_FRIENDLY);
}
} catch (error) {
if (error.status && error.message) {
const {status, message} = error;
res.status(status).json({success: false, message});
return;
}
let errId = generateErrorId();
// internal
let errorInternalDetails = `Error id:${errId} msg:${error.message} stack:${error.stack}`;
this.logger.error(errorInternalDetails);
this.auditLogsService.createAuditLog(errorInternalDetails);
// user
const unexpectedError = res.__('server.error.unexpected');
const pleaseReportIssue = res.__('server.pleaseReportIssue');
const issueLink = res.__('server.issueLinkLabel');
let userErrorTxt = `${unexpectedError}, ${pleaseReportIssue} ${BES_ISSUES} - ${errId}`;
let userErrorHtml = `${unexpectedError},${pleaseReportIssue} <a href="${BES_ISSUES}">${issueLink}</a> - ${errId}`;
this.newsService.add(userErrorHtml);
res.status(500).json({success: false, message: userErrorTxt});
}
}
async webPagesResponse(req, res) {
const {version, newsService, config, summaryService} = this;
const projectHomepage = cacheGetProjectHomepage();
const projectIssues = cacheGetProjectBugsUrl();
const projectDiscussions = cacheGetProjectMetadata("projectDiscussions");
const blueskyAccount = cacheGetProjectMetadata("blueskyAccount");
const blueskyDisplayName = cacheGetProjectMetadata("blueskyDisplayName");
const summary = await summaryService.cacheGetWeekSummary({});
newsService.getNews()
.then(news => {
res.render('pages/index', {// page data
__: res.__,
// locale: res.currentLocale,
news, "tz": config.tz,
version, projectHomepage, projectIssues, projectDiscussions,
blueskyAccount, blueskyDisplayName,
summary
});
});
}
async errorHandlerMiddleware(err, req, res) {
const {logger, context} = this;
const url = req.url;
const status = err.status || 500;
try {
const src_ip = req.headers['x-forwarded-for'] || req.connection.remoteAddress;
const method = req.method;
if (status === 404) {
logger.info(`SEC ${err} - ip:${src_ip} - ${method} ${url} - ${status}`,
{...context, status, url, "security": true}
);
} else {
logger.error(`${err} - ip:${src_ip} - ${method} ${url} - ${status}`, {...context, status, url});
}
} catch (e) {
logger.error(`errorHandlerMiddleware unexpected error: ${e.message}`, {...context, status, url});
}
res.status(status).send();
}
} |