java - 如何在 Undertow 中启用 Access-Control-Allow-Origin？

Question

尝试1

builder.setHandler(new HttpHandler() {
                @Override
                public void handleRequest(final HttpServerExchange exchange) throws Exception {
                    exchange.getResponseHeaders().put(new HttpString("Access-Control-Allow-Origin"), "*");
                    exchange.getResponseHeaders().put(new HttpString("Access-Control-Allow-Methods"),
                            "GET, POST, PUT, DELETE, OPTIONS");
                    String ss = exchange.getResponseHeaders().get(new HttpString("Access-Control-Allow-Headers"))
                            .getFirst();
                    System.out.println(ss);
                    exchange.getResponseHeaders().put(new HttpString("Access-Control-Allow-Headers"), ss);
                }
            });

尝试2

HttpHandler enHandler = new SetHeaderHandler("Access-Control-Allow-Origin", "*");
builder.setHandler(enHandler);

我尝试了上述设置以在我的 undertow 服务中启用 CORS，但它不适用于我的 Angular UI。在 postman 中工作正常。

Answer 1

添加这些行后它就可以工作

        ResteasyDeployment rd = new ResteasyDeployment();
        CorsFilter filter = new CorsFilter();
        filter.setAllowedMethods("GET,POST,PUT,DELETE,OPTIONS");
        filter.getAllowedOrigins().add("*");
        rd.setProviderFactory(new ResteasyProviderFactory());
        rd.getProviderFactory().register(filter);