Skip to main content

Ajax JSON cross domain call to REST service

Hello everyone,

I'm going to share the code-sample for Ajax cross domain call to REST service with JSON Request.

Keeping in mind, if you working on to call cross domain to REST service. Here server handle two requests each operations. 

  1. First one for verify the request is OK and return to 200.
  2. Send one is revert back the response.

You will have to think about the security issues and be careful before doing something like 'Access-Control-Allow-Origin: *'


Always return the headers above, not just on OPTION requests. First needs it in the response from the POST.


Table of Contents

1. In the step 1, we added the custom headers in the config file.

2. In the step 2, execute the ajax request.

Step 1 :


In this step, need to add protocol section from web.config file.


  <httpProtocol>
   <customHeaders>
    <add name="Access-Control-Allow-Origin" value="*" />
    <add name="Access-Control-Allow-Headers" value="Content-Type" />
    <add name="Access-Control-Allow-Methods" value="GET, PUT, POST, DELETE, OPTIONS" />
   </customHeaders>
 </httpProtocol>

Some time the above code is not working that time we can trying to added following which are given below.


You can remove protocol section from web.config that we have added.



Add following method in Global.asax


protected void Application_BeginRequest(object sender, EventArgs e)
{
    CrossDomain_AjaxCallJSON();
}

private void CrossDomain_AjaxCallJSON()
{
    HttpContext.Current.Response.AddHeader("Access-Control-Allow-Origin", "*");

     if (HttpContext.Current.Request.HttpMethod == "OPTIONS")
     {
         HttpContext.Current.Response.AddHeader("Access-Control-Allow-Methods", "GET, POST");
         HttpContext.Current.Response.AddHeader("Access-Control-Allow-Headers", "Content-Type, Authorization, Accept");
         HttpContext.Current.Response.End();
     }

}

Step 2


In this step, need to call the ajax request with cross domain request URL just like (https://code-sample.com/services/api/userdetailsservice).


<script type="text/javascript">
    $.ajax({
        url: 'https://code-sample.com/services/api/userdetailsservice',
        type: 'POST',
        data: JSON.stringify({ value: 'details-here' }),
        async: false,
        contentType: 'application/json',
        success: function (response
                    console.log(response
        },
        error: function (response, Status, error) {
            console.log(response);
            console.log(Status);
        }
    });


</script>


By Anil Singh | Rating of this article (*****)

Popular posts from this blog

39 Best Object Oriented JavaScript Interview Questions and Answers

Most Popular 37 Key Questions for JavaScript Interviews. What is Object in JavaScript? What is the Prototype object in JavaScript and how it is used? What is "this"? What is its value? Explain why "self" is needed instead of "this". What is a Closure and why are they so useful to us? Explain how to write class methods vs. instance methods. Can you explain the difference between == and ===? Can you explain the difference between call and apply? Explain why Asynchronous code is important in JavaScript? Can you please tell me a story about JavaScript performance problems? Tell me your JavaScript Naming Convention? How do you define a class and its constructor? What is Hoisted in JavaScript? What is function overloadin

List of Countries, Nationalities and their Code In Excel File

Download JSON file for this List - Click on JSON file    Countries List, Nationalities and Code Excel ID Country Country Code Nationality Person 1 UNITED KINGDOM GB British a Briton 2 ARGENTINA AR Argentinian an Argentinian 3 AUSTRALIA AU Australian an Australian 4 BAHAMAS BS Bahamian a Bahamian 5 BELGIUM BE Belgian a Belgian 6 BRAZIL BR Brazilian a Brazilian 7 CANADA CA Canadian a Canadian 8 CHINA CN Chinese a Chinese 9 COLOMBIA CO Colombian a Colombian 10 CUBA CU Cuban a Cuban 11 DOMINICAN REPUBLIC DO Dominican a Dominican 12 ECUADOR EC Ecuadorean an Ecuadorean 13 EL SALVADOR

AngularJs input date format calendar

Table of Context bout  the input date.  Click for live demo on plnker 1. Allow to use of a custom date format like "yyyy/MM/dd" or "yyyy-MM-dd" etc. 2. Allow to check the input date typed by the user is correct or not. 1 2 3 4 //The model must be a Date object, otherwise Angular will throw an error. //The error is Invalid Date objects will be rendered as an empty string. i.e. The dates whose getTime() is NaN. //The model must be a Date object, otherwise Angular will throw an error. //The error is Invalid Date objects will be rendered as an empty string. i.e. The dates whose getTime() is NaN. The Example 1 code as given below. 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 <!doctype html> <html lang= "en" > <head>      <meta charset= "utf-8" />      <script src= " http://ajax.googleapis.com/ajax/lib

25 Best Vue.js 2 Interview Questions and Answers

What Is Vue.js? The Vue.js is a progressive JavaScript framework and used to building the interactive user interfaces and also it’s focused on the view layer only (front end). The Vue.js is easy to integrate with other libraries and others existing projects. Vue.js is very popular for Single Page Applications developments. The Vue.js is lighter, smaller in size and so faster. It also supports the MVVM ( Model-View-ViewModel ) pattern. The Vue.js is supporting to multiple Components and libraries like - ü   Tables and data grids ü   Notifications ü   Loader ü   Calendar ü   Display time, date and age ü   Progress Bar ü   Tooltip ü   Overlay ü   Icons ü   Menu ü   Charts ü   Map ü   Pdf viewer ü   And so on The Vue.js was developed by “ Evan You ”, an Ex Google software engineer. The latest version is Vue.js 2. The Vue.js 2 is very similar to Angular because Evan You was inspired by Angular and the Vue.js 2 components looks like -

nullinjectorerror no provider for httpclient angular 17

In Angular 17 where the standalone true option is set by default, the app.config.ts file is generated in src/app/ and provideHttpClient(). We can be added to the list of providers in app.config.ts Step 1:   To provide HttpClient in a standalone app we could do this in the app.config.ts file, app.config.ts: import { ApplicationConfig } from '@angular/core'; import { provideRouter } from '@angular/router'; import { routes } from './app.routes'; import { provideClientHydration } from '@angular/platform-browser'; //This (provideHttpClient) will help us to resolve the issue  import {provideHttpClient} from '@angular/common/http'; export const appConfig: ApplicationConfig = {   providers: [ provideRouter(routes),  provideClientHydration(), provideHttpClient ()      ] }; The appConfig const is used in the main.ts file, see the code, main.ts : import { bootstrapApplication } from '@angular/platform-browser'; import { appConfig } from '