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我是GWT初學者。我在GWT開發模式下調試我的程序。網址是http://127.0.0.1:8888/Replayer.html?gwt.codesvr=127.0.0.1:9997。如何在GWT開發模式下獲取遠程服務器的數據?
我想從現有服務器獲取數據,它以json格式提供數據。我的代碼是:
String url = "http://i.abc.com?sid=" + mSessionId + "&action=info";
RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, URL.encode(url));
try {
Request request = builder.sendRequest(null, new RequestCallback() {
public void onError(Request request, Throwable exception) {
// Couldn't connect to server (could be timeout, SOP
// violation, etc.)
Window.alert("Get fudao info error");
mPrepare = false;
}
@Override
public void onResponseReceived(Request request, Response response) {
GWT.log("statuscode:"+response.getStatusCode());
if (200 == response.getStatusCode()) {
// Process the response in response.getText()
Window.alert(response.getText());
mPrepare = true;
} else {
// Handle the error. Can get the status text from
// response.getStatusText()
Window.alert("Get fudao info wrong");
mPrepare = false;
}
}
});
} catch (RequestException e) {
// Couldn't connect to server
}
當運行應用程序時,請求失敗,其狀態被「取消」。是否我不能從本地主機請求SOP限制的遠程服務器地址?
如何在GWT開發模式下獲取遠程服務器的數據?
是否只想在開發模式下從遠程服務器獲取數據,還是想在生產環境中執行此操作? – Peter 2012-02-02 12:18:10
您是否聽說過「同源」政策?如果沒有,請閱讀:http://en.wikipedia.org/wiki/Same_origin_policy – Renato 2012-02-02 19:19:33