如何将 Angular 2 与 Spring 启动应用程序连接？

Question

我使用 HttpModule 发送 post 请求以将登录凭据发送到 Spring 框架应用程序，但请求被 spring security.Angular 应用程序过滤掉了发送 post 请求但发送一些“选项”请求。

下面的代码是做什么的？

public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) {
        HttpServletResponse response = (HttpServletResponse) res;
        HttpServletRequest request = (HttpServletRequest) req;

        response.setHeader("Access-Control-Allow-Origin", "http://localhost:4200");
        response.setHeader("Access-Control-Allow-Methods", "POST, PUT, GET, OPTIONS, DELETE");
        response.setHeader("Access-Control-Allow-Headers", "x-requested-with");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Credentials", "true");

        if (!(request.getMethod().equalsIgnoreCase("OPTIONS"))) {
            try {
                chain.doFilter(req, res);
            } catch(Exception e) {
                e.printStackTrace();
            }
        } else {
            System.out.println("Pre-flight");
            response.setHeader("Access-Control-Allow-Methods", "POST,GET,DELETE");
            response.setHeader("Access-Control-Max-Age", "3600");
            response.setHeader("Access-Control-Allow-Headers", "authorization, content-type," +
                    "access-control-request-headers,access-control-request-method,accept,origin,authorization,x-requested-with");
            response.setStatus(HttpServletResponse.SC_OK);
        }

    }

Answer 1

您的 CORS 配置仅允许来自

的流量

 response.setHeader("Access-Control-Allow-Origin", "http://localhost:4200");

确保您的 Angular 客户端在该特定主机和端口上运行。

浏览器最初发出 HTTP OPTIONS (CORS pre-flight) 请求以验证客户端 host/port 是否与服务器的响应匹配（即 Access-Control-Allow-Origin 响应的值header你设置的)

如何将 Angular 2 与 Spring 启动应用程序连接？

How to connect Angular 2 with Spring boot application?

spring

spring-security

angular

angular-httpclient