SatyaCodes

WebServices- JAX-RS Context

JAX-RS @Context Example

JAX-RS provides the @Context annotation to inject a variety of resources in your RESTful services. Some of the most commonly injected components are HTTP headers, HTTP URI related information

  • HTTP headers

  • HTTP URI details

  • Security Context

  • Resource Context

  • Request

  • Configuration

  • Application

  • Providers

JAX-RS @Context Example

1.Create Dynamic web project in eclipse, convert that into Maven Project

2.Configure pom.xml, web.xml (Skipping)

3.Create RESTFul webservice

package services;

import javax.ws.rs.GET;
 
import javax.ws.rs.Path;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.SecurityContext;
import javax.ws.rs.core.UriInfo;

@Path("/rst")
public class ContextService {

	@GET
    @Path("httpheaders")
	public Response getHttpheaders(@Context HttpHeaders headers){        
 String output = "<h1>@@Context Example - HTTP headers</h1>";
  output =  output+"<br>ALL headers -- "+ headers.getRequestHeaders().toString();        
  output =  output+"<br>All Cookies -- "+ headers.getCookies().values();
  return Response.status(200)
  	.entity(output)
  	.build();
    }
	
	
	@GET
	  @Path("uriinfo")
	  public Response test(@Context UriInfo uriDetails){
 String output = "<h1>@@Context Example - HTTP URI details</h1>";
	output =  output+"<br>ALL query parameters -- "+ uriDetails.getQueryParameters().toString();
	output =  output+"<br>'id' query parameter -- "+ uriDetails.getQueryParameters().get("id");
	output =  output+"<br>Complete URI -- "+ uriDetails.getRequestUri();
  return Response.status(200)
  	.entity(output)
  	.build();
	  }
	
	@GET
	  @Path("securitycontext")
	  public Response test(@Context SecurityContext secContext){
 String output = "<h1>@@Context Example - Security Context</h1>";
 //output =  output+"<br>Caller -- "+ secContext.getUserPrincipal().getName();
 output =  output+"<br>Authentication Scheme -- "+ secContext.getAuthenticationScheme();
 output =  output+"<br>Over HTTPS ? -- "+ secContext.isSecure();
 output =  output+"<br>Belongs to 'admin' role? -- "+ secContext.isUserInRole("admin");
	      return Response.status(200)
  	.entity(output)
  	.build();
	  }
	
	
}

5.Test Webservice directly by using URL / writing webservice client

C:\Users\kaveti_s\Desktop\temp.png

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