问题描述
我正在尝试使用 GWT 请求构建器进行跨站点请求,但我无法使其正常工作.如您所见,这是一个 GWT 项目示例,我已经浏览了 https://developers.google.com/web-toolkit/doc/latest/tutorial/Xsite.但我仍然缺少一些东西.
I'm trying to make Cross Site Request using GWT Request builder, which i couldn't get it to work yet. As you can see, this is much of a Sample GWT Project and i have gone through https://developers.google.com/web-toolkit/doc/latest/tutorial/Xsite . But still i'm missing something.
我在这里发布代码.我错过了什么..?
I'm Posting the code here. What am i missing ..?
package com.gwt.reqbuilder.client;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.http.client.Request;
import com.google.gwt.http.client.RequestBuilder;
import com.google.gwt.http.client.RequestCallback;
import com.google.gwt.http.client.RequestException;
import com.google.gwt.http.client.Response;
import com.google.gwt.http.client.URL;
import com.google.gwt.user.client.Window;
public class GWTRequestBuilder implements EntryPoint
{
private static final String JSON_URL = "http://localhost:8000/?q=ABC&callback=callback125";
public void onModuleLoad()
{
GWTPOSTHTTP();
}
public void GWTPOSTHTTP()
{
String postUrl="http://localhost:8000";
String requestData="q=ABC&callback=callback125";
RequestBuilder builder = new RequestBuilder(RequestBuilder.POST, postUrl);
try {
builder.sendRequest(requestData.toString(), new RequestCallback()
{
public void onError(Request request, Throwable e)
{
Window.alert(e.getMessage());
}
public void onResponseReceived(Request request, Response response)
{
if (200 == response.getStatusCode())
{
Window.alert(response.getText());
} else {
Window.alert("Received HTTP status code other than 200 : "+ response.getStatusText());
}
}
});
} catch (RequestException e) {
// Couldn't connect to server
Window.alert(e.getMessage());
}
}
}
推荐答案
其实我们可以从 GWT RequestBuilder 发起跨站请求,如果我们可以在 Servlet Response Header 中设置的话
Actually we can make Cross Site Requests from GWT RequestBuilder if we can set in Servlet Response Header
Response.setHeader("Access-Control-Allow-Origin","http://myhttpserver");
很酷,如果有人需要 GWT 项目和 Python Servlet,请告诉我,我可以上传文件.
It's working Cool , if anyone need the GWT Project and Python Servlet, please do let me know, i can upload the files.
GWT Client Code : https://github.com/manikandaraj/MLabs/tree/master/GWT/GWTClient
这篇关于GWT RequestBuilder - 跨站点请求的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!