ES6 JS class for intervaled requests with retries and timeouts. 

ES6 JS class for intervaled requests with retries and timeouts

falconscript

advancedrequest

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var request = require('request'); // https://github.com/request/request

 * Manager for sending HTTP requests with multiple tries, wait intervals, and timeouts

 *   'postData': {asdfa: "asdf", "okef": "efe" }

 * This can be configured by adding names as keys and values with requiredInterval

 * in order to WAIT before sending another request of that name. If you wanted to

 * only send one request with name DevAPI_SendFriendRequest per minute, set the

 * requiredInterval to 1000*60 and the minute will automatically be enforced

 * All 'lastruns' start with the moment of script start

 * to make sure script restarts don't accidentally disobey the interval

    //'WebAPIfollowCMD': { lastReqTime: new Date(), requiredInterval: 1000*10 }, // 10 seconds

    //'WebAPIunfollowCMD': { lastReqTime: new Date(), requiredInterval: 1000*60*10 }, // 10 minutes

    this.opts.method = args.method || "GET";

    if (typeof(this.opts.postData) == "object") {

      this.opts.postData = JSON.stringify(this.opts.postData);

    this.name = args.name || "unnamed request";

    this.maxRetries = args.maxRetries || 10; // Pass in 0 for unlimited

    // Pass this in as true to avoid multipart header. This is rare; some API endpoints need it

    this.noMultipartHeader = args.noMultipartHeader || false;

    // If downloading file to disk, pass in this as the raw filename to save as

    this.isBinaryRequest = args.isBinaryRequest || this.saveAs;

    this.callback = args.callback || function () {

        console.log("[!] No request callback provided!");

    this.numTriesSoFar = 0; // start at zero

    this.requestHeaders = {}; // nodejs request sent OUT

    this.responseHeaders = [];  // headers for the request RESPONSE

   * addHeader('Cookie: awefaf=ewfef;wefweafwef');

    this.requestHeaders[pieces[0]] = pieces[1]; // Could do .toLowerCase() on pieces[0]

    // .pop to pull off the first instance of ': ' because ': ' could occur later in the header

    this.requestHeaders[pieces.shift()] = pieces.join(': '); // Could do .toLowerCase() on pieces.shift()

   * Occurs when the request has called .fail enough times to equal the 'this.maxRetries' count

   * You may want to override this function as your needs demand

    console.log("[!] Max request retries exceeded for request named (", this.name, ")", ". Throwing exception!");

    throw "ADVANCEDREQUEST_RETRIES_EXCEEDED";

   * Increment retries counter and retry the request in 'sleepSeconds' seconds

   * or KILL the node process if too many retries have happened

    console.log("[!]", additionalMsg || 'AdvancedRequest.fail call -',

      "Status:", this.responseStatusCode, "url:", this.opts.url, "name:", this.name,

      "tries left:", this.maxRetries - this.numTriesSoFar, "options:", this.reqOptions);

    if (this.numTriesSoFar >= this.maxRetries && this.maxRetries != 0) {

        return this.onRequestRetriesExhausted();

    setTimeout(this.run.bind(this), sleepSeconds*1000.0); // convert to full seconds here

    // Allow setting a lastRunHash on the class (probably subclass) or use the module one instead

    return this.lastRunHash || lastRunHash;

    // Update last run time for this request if applicable. (in future add username?)

    if (this.getLastRunHash()[this.name]) {

      // We use THIS moment, the END of the request as the marker.

      this.getLastRunHash()[this.name].lastReqTime = new Date();

   * Recommended that this be overridden to check for particular error types

    console.log("[D] NOTE: AdvancedRequest.postProcess probably should be overridden " +

      "(usually through inheritance) and given verification criteria");

    // for example, override and have a check:

    // if (!this.data) return this.fail(10, "Response was blank! Retrying in 10 seconds");

    // In your subclass, remember to include this line to complete the request

    // If this is a request with limitations

      // initialize now if not initialized yet

      if (!this.getLastRunHash()[this.name].lastReqTime) {

        this.getLastRunHash()[this.name].lastReqTime = new Date();

      var millisecondsSinceLastRequest = (new Date() - this.getLastRunHash()[this.name].lastReqTime);

      return millisecondsSinceLastRequest < this.getLastRunHash()[this.name].requiredInterval;

    if (this.isSleepIntervalNecessary()) {

      var timeToSleep = this.getLastRunHash()[this.name].requiredInterval - millisecondsSinceLastRequest;

      console.log("[D] Sleeping", timeToSleep/(1000), "seconds now");

      setTimeout(() => { this.sleepIntervalIfNecessary(callback); }, timeToSleep);

   * Call at any point to cancel a request from being sent out or stop it from

   * retrying if it is in the process of failing or sleeping.

   * NOTE: The provided callback in the constructor will not be called if canceled.

  "description": "ES6 JS class for intervaled requests with retries and timeouts",

  "keywords": ["advancedrequest", "advanced request", "http", "request",

      "interval", "interval request", "api", "developer api", "rate", "limit", "rate limit", "rate limiting" ],

    "url": "git://github.com/falconscript/advancedrequest"

> ES6 JS class for intervaled requests with retries and timeouts

Manager for sending HTTP requests with multiple tries, wait intervals, and timeouts  

This can be configured by adding names as keys and values with requiredInterval  

in order to WAIT before sending another request of that name. If you wanted to  

only send one request with name DevAPI_SendFriendRequest per minute, set the  

requiredInterval to 1000*60 and the minute will automatically be enforced  

All 'lastruns' start with the moment of script start  

to make sure script restarts don't accidentally disobey the interval  

var advancedrequest = require('advancedrequest');

    url: "http://api.somefriendsite.com/addFriend",

      console.log("[+] API response received!", dataString);

Here you can define our own logic to determine if a request was successful  

or needs to be retried by subclassing advancedrequest.AdvancedRequest

class DevApiRequest extends advancedrequest.AdvancedRequest {

    super(args); // always call superclass constructor!

  // Override the postProcess function to provide your own checks

    // this.data is the body of the request.

      // If the response was blank, call this.fail to retry the same request in 10 seconds

      this.fail(10, "Request was blank! Is connection to internet broken?");

    } else if (this.data.indexOf('Too many requests in the last hour!') != -1) {

      // If the API has a limit and tells you about it, you can call this.fail and retry in 1 hour

      this.fail(60*60, "Hit rate limit. Waiting 1 hour to retry");

      // All was clear! MAKE SURE YOU HAVE this line at the end of your request!

// Then once you've written your DevApiRequest class, maybe you'd call it so:

		{
		"name": "advancedrequest",
		"private": false,
		"version": "1.0.10",
		"version": "1.0.11",
		"description": "ES6 JS class for intervaled requests with retries and timeouts",
		@@ -6,0 +6,0 @@ "keywords": ["advancedrequest", "advanced request", "http", "request",

		@@ -104,2 +104,2 @@ # advancedrequest
		## Credits
		http://c-cfalcon.rhcloud.com
		http://x64projects.tk/

		@@ -79,3 +79,4 @@
		var pieces = fullHeader.split(': ');
		this.requestHeaders[pieces[0]] = pieces[1]; // Could do .toLowerCase() on pieces[0]
		// .pop to pull off the first instance of ': ' because ': ' could occur later in the header
		this.requestHeaders[pieces.shift()] = pieces.join(': '); // Could do .toLowerCase() on pieces.shift()
		}
		@@ -82,0 +83,0 @@

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