Java 如何将RestyGWT部件的请求发送到另一个服务器项目?
我有一个restyGWT+GXT项目,它向服务器项目Spring Boot发送请求,因此,我的restyGWT+GXT部分:Java 如何将RestyGWT部件的请求发送到另一个服务器项目?,java,rest,request,cors,resty-gwt,Java,Rest,Request,Cors,Resty Gwt,我有一个restyGWT+GXT项目,它向服务器项目Spring Boot发送请求,因此,我的restyGWT+GXT部分: import org.fusesource.restygwt.client.MethodCallback; import org.fusesource.restygwt.client.RestService; import javax.ws.rs.Consumes; import javax.ws.rs.GET; import javax.ws.rs.Path; imp
import org.fusesource.restygwt.client.MethodCallback;
import org.fusesource.restygwt.client.RestService;
import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import java.util.List;
public interface LoadHelloService extends RestService {
@GET
@Path("/rest/loadHelloService")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public void loadHelloService(MethodCallback<List<Hello>> callback);
}
格雷德尔大厦:
...
compile 'org.fusesource.restygwt:restygwt:2.0.3'
compile 'javax.ws.rs:jsr311-api:1.1.1'
我的rest服务在restyGWT+GXT部分:
import org.fusesource.restygwt.client.MethodCallback;
import org.fusesource.restygwt.client.RestService;
import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import java.util.List;
public interface LoadHelloService extends RestService {
@GET
@Path("/rest/loadHelloService")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public void loadHelloService(MethodCallback<List<Hello>> callback);
}
在MainMenuPage中实现IsWidget:
单击菜单按钮1将请求发送到服务器项目Spring Boot:
因此,使用loadHelloListFromServer方法的RestServerLoader类:
所以,当我发送请求时,我输入方法loadHelloPreflight,但当将请求发送到loadHelloList时,我有:org.fusesource.restygwt.client.FailedStatusCodeException:状态代码0.,为什么??:,当我从浏览器Postman客户端向服务器部分发送请求时,Spring Boot-一切正常!,我得到了他的列表,但我想从restyGWT+GXT部分获得:请帮帮我。您是否忘记了下面的一些cors标题
.header("Access-Control-Allow-Headers", "x-http-method-override");
import com.google.gwt.core.client.GWT;
import com.sencha.gxt.widget.core.client.box.MessageBox;
import org.fusesource.restygwt.client.*;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class RestServerLoader {
public void loadHelloListFromServer() {
String pageBaseUrl = "http://127.0.0.1:8080/";
Defaults.setServiceRoot(pageBaseUrl);
Map<String, String> headers = new HashMap<>();
headers.put("Access-Control-Allow-Methods", "GET");
Resource resource = new Resource(Defaults.getServiceRoot(), headers);
LoadHelloService service = GWT.create(LoadHelloService.class);
((RestServiceProxy)service).setResource(resource);
service.loadHelloService(new MethodCallback<List<Hello>>() {
public void onSuccess(Method method, List<Hello> response) {
MessageBox messageBox = new MessageBox("response (list) = " + response.toString());
messageBox.show();
//code your stuff here
}
public void onFailure(Method method, Throwable exception) {
MessageBox messageBox = new MessageBox("exception = " + exception);
messageBox.show();
//code your stuff here
}
});
}
}
import javax.servlet.http.HttpServletResponse;
import javax.ws.rs.*;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import java.util.ArrayList;
import java.util.List;
@Path("/")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public class HelloResource {
@Context
private HttpServletResponse response;
@OPTIONS
@Path("loadHelloService") //The response for the preflight request made implicitly by the bowser
public Response loadHelloPreflight() {
Response response = Response.ok()
.header("Access-Control-Allow-Origin", "*")
.header("Access-Control-Allow-Methods", "POST, GET, UPDATE, OPTIONS")
.header("Access-Control-Allow-Headers", "*")
.header("Access-Control-Max-Age", "18000").build();
return response;
}
@GET
@Path("loadHelloService")
public List<Hello> loadHelloList() {
response.addHeader("Access-Control-Allow-Origin", "*");
response.addHeader("Access-Control-Allow-Methods", "POST, GET, UPDATE, OPTIONS");
response.addHeader("Access-Control-Allow-Headers", "*");
List<Hello> list = new ArrayList<>();
list.add(new Hello("1", "ronan"));
list.add(new Hello("2", "john"));
return list;
}
}
.header("Access-Control-Allow-Headers", "x-http-method-override");