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mydraftcc-nodejs-server/server/app.js

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2022-06-04 18:04:25 +00:00
require("include-path")(["./lib"]);
const express = require("express");
//to parser body as json fetch must have parameter
//headers: {
// 'Content-Type': 'application/json',
//},
const bodyParser = require("body-parser");
const path = require("path");
const cookieParser = require("cookie-parser");
const http = require("http");
//Helpers
const HelperXhr = require("HelperXhr");
//Logs nodejs
//--> http: morgan
const morgan = require("morgan");
const logger = require("logger");
//cors
const cors = require("cors");
//framework express
const app = express();
//Body parser
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
//API routes
const routes = require("./routes.js");
//Swagger UI
const swaggerUi = require("swagger-ui-express");
const YAML = require("yamljs");
const swaggerDocumentCore = YAML.load("./openapi.yaml");
const swaggeroptions = {
explorer: true,
};
//cors options - no options
app.use(cors({}));
/**
* explainations : https://dev.to/p0oker/why-is-my-browser-sending-an-options-http-request-instead-of-post-5621
*/
app.use(function (req, res, next) {
res.header("Access-Control-Allow-Methods", "GET, PUT, POST, DELETE, OPTIONS");
res.header(
"Access-Control-Allow-Headers",
"Content-Type, InstantKey, Content-Length, X-Requested-With"
);
//OPTIONS methods interception
if ("OPTIONS" === req.method) {
res.sendStatus(200);
} else {
next();
}
});
// listening port server
app.set("PORT", process.env.PORT || "4000");
// listening IP address server
app.set("IPADDRESS", process.env.IPADDRESS || "0.0.0.0");
// Max size allowed to upload Json files (Default is 2Mo)
app.set("JSONMAXSIZE", process.env.JSONMAXSIZE || 2 * 1024 * 1024);
//logger become global to controller via req.app.get('logger')
app.set("logger", logger);
//Application logs - format see wiki about morgan logs
let loghttpformat = "combined";
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, "public")));
//set log http
app.use(morgan(loghttpformat));
// Routes
try {
// route / load public content
app.use("/", express.static(path.join(__dirname, "public")));
// route /api-docs load Swagger UI
app.use(
"/api-docs",
swaggerUi.serve,
swaggerUi.setup(swaggerDocumentCore, swaggeroptions)
);
// route /xxx-xxx-xxxx where xxx-xxx-xxx is a diagram Id
app.use(
"/:diagramId",
express.static(path.join(__dirname, "public", "index.html"))
);
// API Routes
app.use(routes);
} catch (err) {
// logger.error(err.toString(), err);
logger.error(err.toString(), err);
}
// resource not found - 404 and forward to error handler
app.use(function (req, res, next) {
console.log("Resource is missing");
req.statusCode = 404;
next(new Error(), req, res);
});
// Global error handler
app.use(function (err, req, res, next) {
let statuscode = req.statusCode; //404 received ???
if (!statuscode) statuscode = 500;
if (statuscode !== 404) {
logger.error(err.toString(), err);
message = "Internal Error - see logs";
} else {
message = "404-Resource Not Found";
}
if (HelperXhr.isXhrRequest(req)) {
res.status(statuscode).json({ error: message });
} else {
res.status(statuscode).send("<html><h1>" + message + "</h1></html>");
}
});
const httpServer = http.createServer(app);
//catch httpServer Errors type uncaughtException :EADDRNOTAVAIL EADDRINUSE
process.on("uncaughtException", function (err) {
logger.error(err.toString(), err);
});
//start server
httpServer.listen(app.get("PORT"), app.get("IPADDRESS"), function () {
logger.info({
listeningonipaddress: app.get("IPADDRESS"),
listeningonport: app.get("PORT"),
});
});
module.exports = app;