package middleware;

/**
 * CORS中间件装饰器
 * 具体装饰器类，用于处理跨域资源共享请求
 */
public class CORSMiddleware extends MiddlewareDecorator {
    
    public CORSMiddleware(HttpRequestHandler decoratedHandler) {
        super(decoratedHandler);
    }
    
    @Override
    public HttpResponse handle(HttpRequest request) {
        HttpResponse response = super.handle(request);
        
        // 添加CORS头信息
        String existingHeaders = response.getHeaders() != null ? response.getHeaders() + "\n" : "";
        response.setHeaders(existingHeaders + "Access-Control-Allow-Origin: *\nAccess-Control-Allow-Methods: GET, POST, PUT, DELETE\nAccess-Control-Allow-Headers: *");
        
        return response;
    }
}