将本地React前端连接到本地Spring Boot中间件应用程序

时间:2018-03-01 12:00:37

标签: java reactjs rest spring-boot cors

我正在研究React中的前端应用程序,该应用程序连接到用Spring引导编写的中间件服务。 我试图从前端调用端点,如下所示:

return axios.post('http://localhost:8085/workshop/client/createClient', {username})
.then((response) => {
  console.log('Success')
})
.catch((error) => console.log(error));

每当我在浏览器中发出请求时,我都会收到以下错误:

OPTIONS http://localhost:8085/workshop/client/createClient 401 ()

Failed to load http://localhost:8085/workshop/client/createClient: Response for preflight has invalid HTTP status code 401.

据我了解,这是因为我的中间件应用程序阻止了预检请求。 在线阅读了有关启用此功能的信息,我在我的春季启动应用程序中添加了一个CorsFilter:

@Slf4j
public class CORSFilter implements Filter {
  private static final String ONE_HOUR = "3600";

  @Override
  public void init(FilterConfig filterConfig) throws ServletException {
  }

  @Override
  public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
    HttpServletResponse response = (HttpServletResponse) res;
    response.setHeader("Access-Control-Allow-Origin", "*");
    response.setHeader("Access-Control-Allow-Methods", "POST, PUT, GET, OPTIONS, DELETE");
    response.setHeader("Access-Control-Max-Age", ONE_HOUR);
    response.setHeader("Access-Control-Allow-Headers", "X-Requested-With,Origin,Content-Type, Accept, x-device-user-agent, Content-Type");

    if (req instanceof HttpServletRequest) {
       HttpServletRequest httpServletRequest = (HttpServletRequest) req;
       if (httpServletRequest.getHeader(HttpHeaders.ORIGIN) != null
          && httpServletRequest.getMethod().equals(HttpMethod.OPTIONS.name())
          && httpServletRequest.getHeader(HttpHeaders.ACCESS_CONTROL_REQUEST_METHOD) != null) {
          log.debug("Received an OPTIONS pre-flight request.");
          return;
       }
    }
    chain.doFilter(req, res);
  }

  @Override
  public void destroy() {
  }
}

@Configuration
public class MvcConfiguration {

 @Bean
 public FilterRegistrationBean corsFilter() {
   FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
   filterRegistrationBean.setFilter(new CORSFilter());
   filterRegistrationBean.addUrlPatterns("/*");
   filterRegistrationBean.setOrder(0);
   return filterRegistrationBean;
 }
}

以下是端点示例:

 @PostMapping("/createClient")
 public ResponseEntity<?> createClient(@RequestBody CreateClientDto clientDto) {
    try {
     ...
     return new ResponseEntity<>(responseBody, OK);
    } catch (Exception e ...) {}
  }

非常感谢任何帮助:)

更新:我的网址略有错误(因此404)。我已更新错误消息。我似乎仍然遇到了CORS问题。

这些是我在开发工具中可以看到的响应头:

Access-Control-Allow-Credentials:true
Access-Control-Allow-Headers:access-control-allow-credentials, access-control-allow-methods, access-control-allow-origin, allow, content-type
Access-Control-Allow-Methods:POST
Access-Control-Allow-Origin:http://localhost:3000
Allow:GET, HEAD, POST, PUT, DELETE, TRACE, OPTIONS, PATCH
Cache-Control:no-cache, no-store, max-age=0, must-revalidate
Content-Length:0
Date:Thu, 01 Mar 2018 14:06:38 GMT
Expires:0
Pragma:no-cache
Strict-Transport-Security:max-age=31536000 ; includeSubDomains
Vary:Origin
WWW-Authenticate:Basic realm="Spring"
X-Content-Type-Options:nosniff
X-Frame-Options:DENY
X-XSS-Protection:1; mode=block

请求标题:

OPTIONS /workshop/client/createClient HTTP/1.1
Host: localhost:8085
Connection: keep-alive
Access-Control-Request-Method: POST
Origin: http://localhost:3000
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3) 
AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.186 Safari/537.36
Access-Control-Request-Headers: access-control-allow-credentials,access-control-allow-methods,access-control-allow-origin,allow,content-type
Accept: */*
Accept-Encoding: gzip, deflate, br
Accept-Language: en-GB,en;q=0.9,en-US;q=0.8,da;q=0.7

5 个答案:

答案 0 :(得分:2)

问题似乎已得到解决。我错过了Accept请求标题(感谢@Anadi Sharma),我还将spring-boot-starter-security作为依赖项,似乎未经授权返回。我也不需要CorsFilter,最后我只是在端点上使用了@CrossOrigin注释。

答案 1 :(得分:1)

这是一个标准的CORS问题,这基本上意味着用户代理即http://localhost:3000无权访问http://localhost:8085的资源。您可以在https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS了解更多相关信息。

您的请求标头应完全映射到服务器规则。将任何参数保留为*都不起作用。

例如,如果您的请求标头包含以下内容:

Access-Control-Request-Method: POST
Access-Control-Request-Headers: <your custom headers>

然后,服务器规则显示映射您的请求标头:

Access-Control-Request-Method: GET, PUT, DELETE, POST
Access-Control-Request-Headers: <your custom headers>

让我知道它是否有帮助!

答案 2 :(得分:1)

我也遇到了这个问题,但是请允许我以一种更简单的交流方式给出直接的答案。

首先,您必须告诉服务器(Spring boot java)关于客户端(Reactjs) URL

例如,大多数情况下,spring boot使用http://localhost:8080和Reactjs uses http://localhost:3000

因此,您必须导航到Spring boot java中的控制器,并允许Reactjs的 URL 被授予服务器中的可访问性权限(Spring boot)。这将帮助您摆脱 CORS 问题。

我们如何在Spring Boot中做到这一点?只需添加@CrossOrigin批注,指定Reactjs URL 链接,如下所示:

例如:

 @GetMapping("/orphans")
    @CrossOrigin(origins = "http://localhost:3000")
    Iterable<Student> read() {
        return studentService.findAll();
    }

上面的方法是列出所有孤儿,所以我给了Reactjs URL 链接权限,然后摆脱了 CORS 问题。

快乐的编码。

答案 3 :(得分:0)

Controller.java

请参阅下面的示例代码来解决此问题。

@CrossOrigin(origins = "http://localhost:3000")
@RequestMapping(value="/sample", method = RequestMethod.GET, produces = "application/json")

public Student getStudent(){
}

答案 4 :(得分:0)

在获取的代码行下方添加

  export function getData(endpoint = '/', request = {}) {
    let url = endpoint;
    let req = Object.assign(
      {
        headers: {
          Accept: 'application/json',
          'Content-Type': 'application/json',
          'Access-Control-Allow-Origin': '*',
        },
      },
      request
    );
    console.log('url,req', url, req);
    return fetch(url, req).then(handleResponse).catch(handleErrors);
  }

并在Rest Controller类下方添加以下行

@RestController
@CrossOrigin(origins = "*", allowedHeaders = "*")
class TestController{}

希望这会有所帮助:)