使用Spring Framework为选项请求启用CORS

Question

每次对服务进行PUT Ajax调用时，它都会返回以下错误：

@SpringBootApplication
@EnableAutoConfiguration
public class Application extends SpringBootServletInitializer{

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(DispatcherServletInitializer.class, OptionsController.class,Application.class);
    }
}

public abstract class DispatcherServletInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

    @Override
    protected void customizeRegistration(ServletRegistration.Dynamic registration) {
        registration.setInitParameter("dispatchOptionsRequest", "true");
        super.customizeRegistration(registration);
    }
}

用于处理所有选项请求控制器：

@Controller
public class OptionsController {

    @RequestMapping(method = RequestMethod.OPTIONS)
    public HttpServletResponse handle(HttpServletResponse theHttpServletResponse) throws IOException {
        theHttpServletResponse.addHeader("Access-Control-Allow-Headers", "origin, content-type, accept, x-requested-with");
        theHttpServletResponse.addHeader("Access-Control-Max-Age", "60"); 
        theHttpServletResponse.addHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS");
        theHttpServletResponse.addHeader("Access-Control-Allow-Origin", "*");
        return theHttpServletResponse;
    }

}

Answer 1

最后，DispatcheServlet自定义初始化器是真正解决了我的问题的类。OPTIONS请求失败是因为我实现了optionsController，这是错误的。

所以我删除了optionsController，只需在Rest控制器中为OPTIONS请求添加handle方法，问题就解决了：

@CrossOrigin(origins = "*", maxAge = 3600)
@RestController
@RequestMapping("/users")
public class Users {

    @RequestMapping(
            value = "/edit",
            method = RequestMethod.PUT)
    public ResponseEntity<?> create(@RequestBody User user){
         ....
         ....
    }

    @RequestMapping(
            value = "/**",
            method = RequestMethod.OPTIONS
    )
    public ResponseEntity handle() {
        return new ResponseEntity(HttpStatus.OK);
    }
}