如何在 FilterRegistrationBean 中获取 @PathVariable？ 弹簧靴

Question

我请求的路径是：

localhost:8080/companies/12/accounts/35

我的 Rest Controller 包含此功能，我想在 Filter 中获取 companyId 和 accountId。

@RequestMapping(value = "/companies/{companyId}/accounts/{accountId}", method = RequestMethod.PUT)
public Response editCompanyAccount(@PathVariable("companyId") long companyId, @PathVariable("accountId") long accountId,
@RequestBody @Validated CompanyAccountDto companyAccountDto,
                                       HttpServletRequest req) throws ErrorException, InvalidKeySpecException, NoSuchAlgorithmException

是否有任何功能可用于在过滤器内接收此信息？

Answer 1

Map pathVariables = (Map) request.getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE);  
String companyId = (String)pathVariables.get("companyId"); 
String accountId= (String)pathVariables.get("accountId");

Answer 2

如果您指的是 Spring Web 过滤器链，则必须手动解析 servlet 请求中提供的 URL。 这是因为过滤器在实际控制器获取请求之前执行，然后执行映射。

Answer 3

更适合在 Spring 过滤器（拦截器）中执行此操作。要存储检索到的值以便稍后在控制器或服务部分中使用它，请考虑使用具有 Scope 请求的 Spring bean（请求范围为单个 HTTP 请求）。 下面是拦截器代码示例：

@Component
public class RequestInterceptor implements Filter {

    private final RequestData requestData;

    public RequestInterceptor(RequestInfo requestInfo) {

        this.requestInfo = requestInfo;
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
            FilterChain filterChain) throws IOException, ServletException {

        HttpServletRequest request = (HttpServletRequest) servletRequest;
        //Get authorization
        var authorization = request.getHeader(HttpHeaders.AUTHORIZATION);

        //Get some path variables
        var pathVariables = request.getHttpServletMapping().getMatchValue();
        var partyId = pathVariables.substring(0, pathVariables.indexOf('/'));

        //Store in the scoped bean
        requestInfo.setPartyId(partyId);

        filterChain.doFilter(servletRequest, servletResponse);
    }
}

为了安全访问RequestData bean 中的存储值，我建议始终使用 ThreadLocal 构造来保存托管值：

@Component
@Scope(value = "request", proxyMode =  ScopedProxyMode.TARGET_CLASS)
public class RequestData {

    private final ThreadLocal<String> partyId = new ThreadLocal<>();

    public String getPartyId() {

        return partyId.get();
    }

    public void setPartyId(String partyId) {

        this.partyId.set(partyId);
    }
}

Answer 4

通过添加拦截器它会起作用。 问题的完整代码： https : //stackoverflow.com/a/65503332/2131816