When the connection fails with one of ECONNRESET , ENOTFOUND , ESOCKETTIMEDOUT , ETIMEDOUT , ECONNREFUSED , EHOSTUNREACH , EPIPE , EAI_AGAIN or when an HTTP 5xx or 429 error occurrs, the request will automatically be re-attempted as these are often recoverable errors and will go away on retry.

Install with npm .

npm install --save requestretry
Usage
Request-retry is a drop-in replacement for request but adds two new options maxAttempts and retryDelay. It also adds one property to the response (or the error object, upon a network error), attempts. It supports callbacks or promises.
With callbacks
var request = require('requestretry');
request({
  url: 'https://api.domain.com/v1/a/b',
  json: true,
  // The below parameters are specific to request-retry
  maxAttempts: 5,   // (default) try 5 times
  retryDelay: 5000,  // (default) wait for 5s before trying again
  retryStrategy: request.RetryStrategies.HTTPOrNetworkError // (default) retry on 5xx or network errors
}, function(err, response, body){
  // this callback will only be called when the request succeeded or after maxAttempts or on error
  if (response) {
    console.log('The number of request attempts: ' + response.attempts);
});
With promises
When you're using promises, you can pass the two following options:
fullResponse (default true) - To resolve the promise with the full response or just the body
promiseFactory (default whenjs) - A function to allow the usage of a different promise implementation library
request({
  url: 'https://api.domain.com/v1/a/b',
  json: true,
  fullResponse: true // (default) To resolve the promise with the full response or just the body
.then(function (response) {
  // response = The full response object or just the body
.catch(function(error) {
  // error = Any occurred error
Using promiseFactory option to use a different promise implementation library
// See the tests for different libraries usage examples
 * @param  {Function} resolver The promise resolver function
 * @return {Object} The promise instance
function customPromiseFactory(resolver) {
  // With when.js
  return require('when').promise(resolver);
  // With RSVP.js
  var Promise = require('rsvp').Promise;
  return new Promise(resolver);
request({
  url: 'https://api.domain.com/v1/a/b',
  json: true,
  // Custom promise factory function
  promiseFactory: customPromiseFactory
.then(function (response) {
  // response = The full response object or just the body
.catch(function(error) {
  // error = Any occurred error
How to define your own retry strategy
A retry strategy let you specify when request-retry should retry a request
 * @param  {Null | Object} err
 * @param  {Object} response
 * @param  {Object} body
 * @param  {Object} options copy 
 * @return {Boolean} true if the request should be retried
function myRetryStrategy(err, response, body, options){
  // retry the request if we had an error or if the response was a 'Bad Gateway'
  return !!err || response.statusCode === 502;
 * @param  {Null | Object} err
 * @param  {Object} response
 * @param  {Object} body
 * @param  {Object} options copy 
 * @return {Object} mustRetry: {Boolean} true if the request should be retried
 *                  options: {Object} new options for request
function myRetryStrategy(err, response, body, options){
  options.url = 'new url'; //you can overwrite some attributes or create new object 
  return {
    mustRetry: !!err || response.statusCode === 502,
    options: options, //then it should be passed back, it will be used for new requests
 * With an asynchronous retry strategy
 * @param  {Null | Object} err
 * @param  {Object} response
 * @param  {Object} body
 * @param  {Object} options copy 
 * @return {Object} mustRetry: {Boolean} true if the request should be retried
 *                  options: {Object} new options for request
async function myRetryStrategy(err, response, body, options){
  let token = await getNewApiAuthToken();
  options.headers = {'Authorization': `Bearer ${token}`}
  return {
    mustRetry: true,
    options: options, // retry with new auth token
request({
  url: 'https://api.domain.com/v1/a/b'
  json:true,
  retryStrategy: myRetryStrategy
}, function(err, response, body){
  // this callback will only be called when the request succeeded or after maxAttempts or on error
});
How to define your own delay strategy
A delay strategy let you specify how long request-retry should wait before trying again the request
 * @param  {Null | Object} err
 * @param  {Object} response
 * @param  {Object} body
 * @return {Number} number of milliseconds to wait before trying again the request
function myDelayStrategy(err, response, body){
  // set delay of retry to a random number between 500 and 3500 ms
  return Math.floor(Math.random() * (3500 - 500 + 1) + 500);
request({
  url: 'https://api.domain.com/v1/a/b'
  json:true,
  delayStrategy: myDelayStrategy // delayStrategy is called 1 less times than the maxAttempts set
}, function(err, response, body){
  // this callback will only be called when the request succeeded or after maxAttempts or on error
});
Here is how to implement an exponential backoff strategy:
 * @param   {Number} attempts The number of times that the request has been attempted.
 * @return  {Number} number of milliseconds to wait before retrying again the request.
function getExponentialBackoff(attempts) {
  return (Math.pow(2, attempts) * 100) + Math.floor(Math.random() * 50);
function constructExponentialBackoffStrategy() {
  let attempts = 0;
  return () => {
    attempts += 1;
    return getExponentialBackoff(attempts);
request({
  url: 'https://api.domain.com/v1/a/b'
  json:true,
  delayStrategy: constructExponentialBackoffStrategy() // need to invoke the function to return the closure.
}, function(err, response, body){
  // this callback will only be called when the request succeeded or after maxAttempts or on error
});

const request = require('requestretry');
console.log(request.Request); // original request library

request.Request = class extends request.Request {
  constructor(url, options, f, retryConfig) {
    super(url, options, f, retryConfig);
    // this constructor will be called for every requestretry call,
    // and give you global logging
    console.log('Request', url, options, f, retryConfig);
Modifying request options
You can use the defaults method to provide default options like so:
var request = require('requestretry').defaults({ json: true, retryStrategy: myRetryStrategy });
API surface
As with request, several helpers are provided for various HTTP methods and usage:
request(options [, callback]).
request(url [, callback]) - same as request(options [, callback]).
request(url, options [, callback]) - same as request(options [, callback]).
request.get(url [, callback]) - same as request(options [, callback]), defaults options.method to GET.
request.get(url, options  [, callback]) - same as request(options [, callback]), defaults options.method to GET.
request.head(url) - same as request(options [, callback]), defaults options.method to HEAD.
request.post(url) - same as request(options [, callback]), defaults options.method to POST.
request.put(url) - same as request(options [, callback]), defaults options.method to PUT.
request.patch(url) - same as request(options [, callback]), defaults options.method to PATCH.
request.del(url) - same as request(options [, callback]), defaults options.method to DELETE.
request.delete(url) - same as request(options [, callback]), defaults options.method to DELETE.
Changelog
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