REST APIVivek DeepakSwayam Arora

Architecture1. Stateless2. Code on demand3. Easy to use

Open End Point

Client Server

Request

Response

Example :-1. Weather APIs of Yahoo, Google etc.2. Site URL from SFDC

Authorized End Point

More about REST1. GET, POST, PUT, DELETE2. The Force.com REST API supports OAuth 2.03. Friendly URLs4. Mobile Apps5. Force.com site6. Web to Anything form

SOAP API REST API

SOAP is a protocol REST is an architectural style

SOAP defines standards to be strictly followed

REST does not define too much standards like SOAP

SOAP defines its own security.

RESTful web services inherits security measures from the underlying transport

XML data format only Plain text, HTML, XML, JSON

Less Popular More Popular

Compression

• Types of Compressiono Response Compressiono Request Compression

• Compression Headerso Accept-Encoding header.o Content-Encoding  header.

Hands On

Creating REST Service1. Write an Apex Class with annotation

@RestResource(urlMapping=‘</resourceURL>*')

2. Create one or more methods using below annotaions:-1. @HttpGet2. @HttpPost3. @HttpDelete4. @HttpPatch5. @HttpPut

Exposing REST Service

1. For Secured End Points: Use a Connected App

2. For Open End Points: Use Salesforce Sites

Calling REST Service1. Add Server End Point to ‘Remote Site Settings’.

2. Generate Access Token and Instance URL1. HttpRequest req = new HttpRequest();2. req.setMethod('GET');3. req.setEndPoint(endUrl+'/services/oauth2/token');4. req.setBody('grant_type=password' +

'&client_id=' + consumerKey+ '&client_secret=' + consumerSecret+ '&username=' + EncodingUtil.urlEncode(userName, 'UTF-8') + '&password=' + EncodingUtil.urlEncode(password, 'UTF-8'));

5. Http http = new Http();6. HttpResponse res = http.send(req);

Calling REST Service3. Calling the REST Api using Access Token:

1. HttpRequest req = new HttpRequest(); 2. req.setMethod(‘GET');

3. req.setHeader('Content-Type', 'application/json'); 4. req.setEndpoint(instanceUrl+'/services/apexrest/SaveCallLog'); 5. req.setHeader('Authorization', 'OAuth '+accestoken); 6. Http http = new Http(); 7. HttpResponse res = http.send(req);

Thank You!