Home Web Front-end JS Tutorial Quickly learn AngularJs HTTP response interceptor_AngularJS

Quickly learn AngularJs HTTP response interceptor_AngularJS

May 16, 2016 pm 03:22 PM

Any time, if we want to add global functionality to the request, such as authentication, error handling, etc., it is a better way to intercept the request before it is sent to the server or when the server returns.

angularJs provides a way to process at the global level through interceptors.

Four types of interceptors

Implement the request method to intercept requests

request: function(config) {
// do something on request success
return config || $q.when(config);
} 
Copy after login

This method will be executed before $http sends the request to the background, so you can modify the configuration or do other operations. This method receives a request configuration object as a parameter and must return a configuration object or a promise. If an invalid configuration object or promise is returned, it will be rejected, causing the $http call to fail.

Implement requestError method to intercept request exceptions

requestError: function(rejection) {
  // do something on request error  return $q.reject(rejection);
} 
Copy after login

Sometimes a request fails to be sent or is rejected by an interceptor. The request exception interceptor will capture those requests that were interrupted by the previous request interceptor. It can be used to restore the request or sometimes to undo the configuration made before the request, such as closing the progress bar, activating buttons and input boxes, etc.

Implement the response method to intercept the response

response: function(response) {
  // do something on response success
return response || $q.when(response);} 
Copy after login

This method will be executed after $http receives the response from the background, so you can modify the response or do other operations. This method receives a response object as a parameter and must return a response object or promise. The response object includes request configuration, headers, status and data from the background. If an invalid response object is returned or the promise will be rejected, the $http call will fail.

Implement responseError method to intercept response exceptions

responseError: function(rejection) {
// do something on response error  return $q.reject(rejection);
} 
Copy after login

Sometimes our background call fails, or it may be rejected by a request interceptor or interrupted by a previous response interceptor. In this case, the response exception interceptor can help us resume the background call.

Interceptor Core

Interception Service Factory

var app = angular.module("ajaxHttp", []);
app.factory("httpInterceptor", [ "$q", "$rootScope", function($q, $rootScope) {
return {
request: function(config) {
// do something on request success
return config || $q.when(config);
},
   requestError: function(rejection) {
     // do something on request error
     return $q.reject(rejection)
   },
response: function(response) {
// do something on response success
return response || $q.when(response);
},
responseError : function(rejection) {
// do something on response error
return $q.reject(rejection);
}
};
}]); 
Copy after login

Register interception factory method

app.config(["$httpProvider", function($httpProvider) {
  $httpProvider.interceptors.push("httpInterceptor");
}]); 
Copy after login

Example

Interception and processing of 401, 404

app.config(["$httpProvider", function($httpProvider) { 
$httpProvider.interceptors.push('httpInterceptor'); 
}]); 
app.factory("httpInterceptor", ["$q", "$injector", function($q, $injector) {
return {
"responseError": function(response) {
if (response.status == 401) {
var rootScope = $injector.get('$rootScope');
var state = $injector.get('$rootScope').$state.current.name;
rootScope.stateBeforLogin = state;
rootScope.$state.go("login");
return $q.reject(response);
}
else if (response.status === 404) {
console.log("404!");
return $q.reject(response);
}
}
};
]);
Copy after login

The above content is to share with you the relevant knowledge of quickly learning AngularJs HTTP response interceptor. I hope you like it, and thank you for your continued support of the Script House website.

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
1 months ago By 尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Replace String Characters in JavaScript Replace String Characters in JavaScript Mar 11, 2025 am 12:07 AM

Detailed explanation of JavaScript string replacement method and FAQ This article will explore two ways to replace string characters in JavaScript: internal JavaScript code and internal HTML for web pages. Replace string inside JavaScript code The most direct way is to use the replace() method: str = str.replace("find","replace"); This method replaces only the first match. To replace all matches, use a regular expression and add the global flag g: str = str.replace(/fi

Custom Google Search API Setup Tutorial Custom Google Search API Setup Tutorial Mar 04, 2025 am 01:06 AM

This tutorial shows you how to integrate a custom Google Search API into your blog or website, offering a more refined search experience than standard WordPress theme search functions. It's surprisingly easy! You'll be able to restrict searches to y

Build Your Own AJAX Web Applications Build Your Own AJAX Web Applications Mar 09, 2025 am 12:11 AM

So here you are, ready to learn all about this thing called AJAX. But, what exactly is it? The term AJAX refers to a loose grouping of technologies that are used to create dynamic, interactive web content. The term AJAX, originally coined by Jesse J

Example Colors JSON File Example Colors JSON File Mar 03, 2025 am 12:35 AM

This article series was rewritten in mid 2017 with up-to-date information and fresh examples. In this JSON example, we will look at how we can store simple values in a file using JSON format. Using the key-value pair notation, we can store any kind

8 Stunning jQuery Page Layout Plugins 8 Stunning jQuery Page Layout Plugins Mar 06, 2025 am 12:48 AM

Leverage jQuery for Effortless Web Page Layouts: 8 Essential Plugins jQuery simplifies web page layout significantly. This article highlights eight powerful jQuery plugins that streamline the process, particularly useful for manual website creation

What is 'this' in JavaScript? What is 'this' in JavaScript? Mar 04, 2025 am 01:15 AM

Core points This in JavaScript usually refers to an object that "owns" the method, but it depends on how the function is called. When there is no current object, this refers to the global object. In a web browser, it is represented by window. When calling a function, this maintains the global object; but when calling an object constructor or any of its methods, this refers to an instance of the object. You can change the context of this using methods such as call(), apply(), and bind(). These methods call the function using the given this value and parameters. JavaScript is an excellent programming language. A few years ago, this sentence was

Improve Your jQuery Knowledge with the Source Viewer Improve Your jQuery Knowledge with the Source Viewer Mar 05, 2025 am 12:54 AM

jQuery is a great JavaScript framework. However, as with any library, sometimes it’s necessary to get under the hood to discover what’s going on. Perhaps it’s because you’re tracing a bug or are just curious about how jQuery achieves a particular UI

10 Mobile Cheat Sheets for Mobile Development 10 Mobile Cheat Sheets for Mobile Development Mar 05, 2025 am 12:43 AM

This post compiles helpful cheat sheets, reference guides, quick recipes, and code snippets for Android, Blackberry, and iPhone app development. No developer should be without them! Touch Gesture Reference Guide (PDF) A valuable resource for desig

See all articles