在Spring Data Rest中支持跨源请求

Question

我有一个web应用程序，我正在使用Angular 2和Spring Boot开发。我使用spring-boot-data-rest依赖项将存储库公开为HTTPendpoint。

在开发过程中，我在运行端口8080的本地tomcat上运行后端spring boot项目。为了开发前端，我使用angular-cli在端口4200上为我的Angular2应用程序提供服务。我在4200上运行的前端需要能够到达在8080上公开的endpoint，但这不起作用，因为：

@RestController
public class MyController {
    @CrossOrigin(origins = "http://localhost:4200")
    @RequestMapping(value = "/whatever")
    public void whatever() {
        //whatever
    }
}

Answer 1

我已经使用了自定义的CORS过滤器来使其工作：

/**
 * Filter for enabling CORS support.
 */
@Component
public class CorsFilter extends OncePerRequestFilter {

    @Override
    protected void doFilterInternal(final HttpServletRequest request, final HttpServletResponse response,
                                    final FilterChain filterChain) throws ServletException, IOException {
        response.addHeader("Access-Control-Allow-Origin", "*");
        response.addHeader("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT, PATCH, HEAD, OPTIONS");
        response.addHeader("Access-Control-Allow-Headers", "Origin, Accept, X-Requested-With, Content-Type, Access-Control-Request-Method, Access-Control-Request-Headers");
        response.addHeader("Access-Control-Expose-Headers", "Access-Control-Allow-Origin, Access-Control-Allow-Credentials");
        response.addHeader("Access-Control-Allow-Credentials", "true");
        response.addIntHeader("Access-Control-Max-Age", 10);
        filterChain.doFilter(request, response);
    }
}