$http service in AngularJS Video Lecture | Learn and Understand AngularJS : For Beginners - Front-End Programming

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FAQs on $http service in AngularJS Video Lecture - Learn and Understand AngularJS : For Beginners - Front-End Programming

1. What is the purpose of the $http service in AngularJS?
Ans. The $http service in AngularJS is used to make HTTP requests to a server and retrieve data asynchronously. It provides a simple way to interact with RESTful APIs and retrieve data from a server.
2. How do you make an HTTP GET request using the $http service in AngularJS?
Ans. To make an HTTP GET request using the $http service in AngularJS, you can use the following syntax: ``` $http.get(url) .then(function(response) { // handle success response }, function(error) { // handle error response }); ``` You need to provide the URL of the server you want to retrieve data from. The response from the server can be handled in the success callback function.
3. Can the $http service in AngularJS handle HTTP POST requests?
Ans. Yes, the $http service in AngularJS can handle HTTP POST requests. To make a POST request, you can use the following syntax: ``` $http.post(url, data) .then(function(response) { // handle success response }, function(error) { // handle error response }); ``` You need to provide the URL of the server you want to send data to, and the data you want to send in the request body. The response from the server can be handled in the success callback function.
4. How can you set headers in an HTTP request using the $http service in AngularJS?
Ans. You can set headers in an HTTP request using the $http service in AngularJS by providing a configuration object as the second parameter to the $http method. Here is an example: ``` $http.get(url, { headers: { 'Content-Type': 'application/json', 'Authorization': 'Bearer token' } }) .then(function(response) { // handle success response }, function(error) { // handle error response }); ``` In this example, we set the 'Content-Type' and 'Authorization' headers in the GET request.
5. How can you cancel an HTTP request made using the $http service in AngularJS?
Ans. To cancel an HTTP request made using the $http service in AngularJS, you can use the `timeout` property in the request configuration object. Here is an example: ``` var canceler = $q.defer(); $http.get(url, { timeout: canceler.promise }) .then(function(response) { // handle success response }, function(error) { // handle error response }); // To cancel the request canceler.resolve(); ``` In this example, we create a canceler using `$q.defer()` and set it as the value of the `timeout` property. If we want to cancel the request, we can call `canceler.resolve()`.
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