在 Spring Data Rest 中启用跨源请求

Question

我有一个正在使用 Angular 2 和 Spring Boot 开发的 Web 应用程序。我使用 spring-boot-data-rest 依赖项将我的存储库公开为 HTTP 端点。

在开发过程中，我运行我的后端 spring 在本地 tomcat 上启动项目运行在端口 8080 上。为了开发前端，我使用angular-cli 在端口 4200 上为我的 Angular 2 应用程序提供服务。我在 4200 上的前端运行ning 需要能够访问暴露在 8080 上的端点，但这不起作用，因为:

No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:4200' is therefore not allowed access.

如果这些是我在 @RestController 中手动输入的自定义端点，我可以简单地添加 @CrossOrigin 注释：

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

但我显然不能为 spring-boot-data-rest 公开的端点执行此操作。那么，我怎样才能让这些端点可以从 http://localhost:4200 来源访问？

Answer 1

也许您可以使用以下组件来启用 CORS 请求。全局应用于application

@Component
@Order(Ordered.HIGHEST_PRECEDENCE)
public class SimpleCorsFilter implements Filter {

  public SimpleCorsFilter() {
  }

  @Override
  public void destroy() {
  }

  @Override
  public void doFilter(final ServletRequest req, final ServletResponse res, final FilterChain chain) throws IOException, ServletException {
    final HttpServletResponse response = (HttpServletResponse) res;
    final HttpServletRequest request = (HttpServletRequest) req;
    response.setHeader("Access-Control-Allow-Origin", "*");
    response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
    response.setHeader("Access-Control-Max-Age", "3600");
    response.setHeader("Access-Control-Allow-Headers", "x-requested-with, authorization, token");

    if ("OPTIONS".equalsIgnoreCase(request.getMethod())) {
      response.setStatus(HttpServletResponse.SC_OK);
    } else {
      chain.doFilter(req, res);
    }
  }

  @Override
  public void init(final FilterConfig filterConfig) {
  }
}

Answer 2

我已经使用我的自定义 CORS 过滤器使其工作：

/**
 * 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);
    }
}

在 Spring Data Rest 中启用跨源请求

Enabling cross origin requests in Spring Data Rest

java

spring

spring-data-rest

spring-boot