Interceptor 不起作用 - 跨域

[xuncai-tech]

已下是写了一个全局的跨域拦截器。但是onIntercept方法不会被调用。
不太清楚是什么原因。

@interceptor
public class OptionsInterceptor implements HandlerInterceptor {
public static void allow(HttpResponse response, HttpMethod... methods) {
String methodHeader = TextUtils.join(",", methods);
response.setHeader("Access-Control-Allow-Origin", "");
response.setHeader("Access-Control-Allow-Methods", methodHeader);
response.setHeader("Access-Control-Allow-Headers", "");
response.setHeader("Access-Control-Allow-Credentials", "true");
response.setHeader("Access-Control-Max-Age", "3600");
response.setHeader("Allow", methodHeader);
}
/**
* Intercept the execution of a handler.
*
* @param request current request.
* @param response current response.
* @param handler the corresponding handler of the current request.
* @return true if the interceptor has processed the request and responded.
*/
@OverRide
public boolean onIntercept(@nonnull HttpRequest request, @nonnull HttpResponse response, @nonnull RequestHandler handler) throws Exception {

    HttpMethod method = request.getMethod();
    Logger.w("OptionsInterceptor onIntercept: "+method);
    if (method == OPTIONS) {
        allow(response,HttpMethod.PUT, HttpMethod.OPTIONS);
        Logger.w("OptionsInterceptor onIntercept: allow ");
        return true;
    }
    return false;
}

}

[yanzhenjie]

#305

[xuncai-tech]

这个问题主要是因为 系统会先发现OPTIONS不被支持，直接就会报错。此时系统还未调用拦截器，所有拦截器无法生效。