How to Perform a callout to send data to an external service in Salesforce ?

Hi Kirandeep,

I'am going to perform a callout to send data to an external service in Salesforce by taking an example:

For instance, when you buy the latest Justin Bieber album or comment on your favorite “Cat in a Shark Costume Chases a Duck While Riding a Roomba” video, your browser is making a POST request to submit data.

Let’s see how we send data in Apex.
This example sends a POST request to the web service to add an animal name.

The new name is added to the request body as a JSON string.

The request Content-Type header is set to let the service know that the sent data is in JSON format so that it can process the data appropriately.

The service responds by sending a status code and a list of all animals, including the one you added.

If the request was processed successfully, the status code returns 201, because a resource has been created.

The response is sent to the debug log when anything other than 201 is returned.

1. Open the Developer Console from the Setup gear ( ).
2. In the Developer Console, select Debug | Open Execute Anonymous Window.
3. Delete any existing code and insert the following snippet.
4. Select Open Log, and then click Execute.
5. When the debug log opens, select Debug Only to view the output of the System.debug statement. The last item in the list of animals is "mighty moose".

Http http = new Http();
HttpRequest request = new HttpRequest();
request.setEndpoint('https://th-apex-http-callout.herokuapp.com/animals');
request.setMethod('POST');
request.setHeader('Content-Type', 'application/json;charset=UTF-8');
// Set the body as a JSON object
request.setBody('{"name":"mighty moose"}');
HttpResponse response = http.send(request);
// Parse the JSON response
if (response.getStatusCode() != 201) {
    System.debug('The status code returned was not expected: ' +
        response.getStatusCode() + ' ' + response.getStatus());
} else {
    System.debug(response.getBody());
}

Hope it helps.