How I can make express server serve only one API request at a time

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I have exposed one API from node express server and I want only one request to be served (due to resource constraints) and other request should just simply be denied. Anyway to achieve this ?

Use express-rate-limit, especially if you want to implement if repeatedly for multiple routes.

npm install --save express-rate-limit

const rateLimit = require("express-rate-limit");

const limiter = rateLimit({  
  windowMs: 15 * 60 * 1000, // 15 minutes
  max: 1 // limit each IP to 1 request per windowMs
});

//  apply to all requests
app.use(limiter);

// only apply to requests that begin with /api/
app.use("/api/", limiter);

// only apply to single route
app.post("/create-account", limiter , function(req, res) {
  //...
});

Building a REST API with Node and Express, REST APIs use different HTTP request methods, corresponding to the previously ExpressJS is one of the most popular HTTP server libraries for Node.js, which ships with Even though we are only going to build a REST API in this article, the This time around, we'll create two files - book-list.html which we'll use as a� With Express, we can write and use middleware functions, which have access to ALL http requests coming to the server. These functions can: Execute any code. Make changes to the request and the response objects. End the request-response cycle. Call the next middleware function in the stack. We can write our own middleware functions, or use third

use LOCK

let lock = false

router.get('/myroute', (req, res, next) => {
    if (lock) {
        req.json({err: 'server busy'})
        return
    }
    lock = true
    // process main functions
    ....
    res.json(result)
    lock = false
})

variable 'lock' is shared to every requests. if one request is requested and set lock to true, other requests which arrived later counter lock is true.

POSTING to Your Express Server. While GET requests are fun, they , Instead, we will store what we send to our server in an array. Postman is the only complete API development environment, for API developers, used by more than 6 million If you followed my last Node/Express tutorial, and have code like in Fig. 1, you It's time to write the endpoint for our POST request. And if you ever need to modify data, you can do it in one spot now: the Express API. Securing the Express API. In the previous article, one of the requirements of the application was that only authenticated users should be able to access all of the details of an event (beyond those shown on the homepage).

There is only one NodeJS thread that executes your API handler in Express. Simply do not use any async code in the API handler and this goal

I want only one request to be served (due to resource constraints)

will be achieved automatically.

and other request should just simply be denied

Is it really necessary? The stated goal related to resource constraints can probably be met if other requests are made to wait.

Node JS Express Handling multiple requests, send object packs an object that will be created after the results from these time consuming API calls is performed. So my res.send can only be� You can then send the one-time code from the sign-in button to your server (4). When the server has the code, the server can exchange it for an access_token (5, 6) that can be stored locally on the server side. The server can then make Google API calls independently of the client.

Measuring requests duration in a Node.js + Express application , First of all, let's make some assumptions. By measuring requests duration I mean measuring only the time needed for The only one legit method to capture all the requests in Express framework is to Personally, one of my client was constantly complaining on my api for not responding properly. For other� For this example we only need two modules. Express and body-parser. Create a new project directory and run: $ npm init && npm install --save express body-parser We only need two files to make the sample app work so go ahead and create an app.js and a server.js. Copy these snippets into the files.

Get Started With Node: An Introduction To APIs, HTTP And ES6+ , You've probably heard of Node.js as being an “asynchronous JavaScript Node is only an environment, or runtime, within which to run normal That call is going to take time, and if the request is “blocking”, then that means In a blocking manner, we make a call to Weather API One and wait for the result. As req.body’s shape is based on user-controlled input, all properties and values in this object are untrusted and should be validated before trusting.For example, req.body.toString() may fail in multiple ways, for example stacking multiple parsers req.body may be from a different parser.

Express 4.x - API Reference, The function determines the file to serve by combining req.url with the a request to a non-existent file will cause this middleware to simply call next() to The example is similar to the ones above, but it only restricts paths that start with “ /api”: cookies in a single response by calling res.cookie multiple times, for example: In this tutorial, we will take a look at creating server-applications with Node.js and the Express framework in relation to angular. We will not only create our first small server-application, but also create a functional REST-API to serve our data.