在Controller層擷取http請求頭資訊

1. @HeaderParam

2. @Context

用法執行個體：      

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;

@Path("/users")
public class UserService {

	@GET
	@Path("/get")
	public Response addUser(@Context HttpHeaders headers) {

		String userAgent = headers.getRequestHeader("user-agent").get(0);
		
		return Response.status(200)
			.entity("addUser is called, userAgent : " + userAgent)
			.build();

	}

}
           

import javax.ws.rs.GET;
import javax.ws.rs.HeaderParam;
import javax.ws.rs.Path;
import javax.ws.rs.core.Response;

@Path("/users")
public class UserService {

	@GET
	@Path("/get")
	public Response addUser(@HeaderParam("user-agent") String userAgent) {

		return Response.status(200)
			.entity("addUser is called, userAgent : " + userAgent)
			.build();

	}

}
           

文章參考： https://www.mkyong.com/webservices/jax-rs/get-http-header-in-jax-rs/