Question

我的角度代码

intercept(req: HttpRequest<any>, next: HttpHandler) {
        const nextReq = req.clone({
            headers: req.headers.set('Cache-Control', 'no-cache')
                .set('Pragma', 'no-cache')
                .set('Expires', 'Sat, 01 Jan 2000 00:00:00 GMT')
                .set('If-Modified-Since', '0')
                .set('Authorization', 'secret')
                .set('client-id', 'test')


        });

        return next.handle(nextReq).timeout(220000).catch(this.handleError);
    }

我的Java服务代码：

@Override
    public boolean preHandle(
            HttpServletRequest request,
            HttpServletResponse response,
            Object handler)
    {
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, PUT, OPTIONS, DELETE");
        response.setHeader("Access-Control-Allow-Headers", "Content-Type, Access-Control-Allow-Headers, Authorization, Access-Control-Allow-Origin,cache-control,client-id,expires,if-modified-since, pragma");


        String clientId = request.getHeader("client-id");

}

运行该应用程序后，出现此错误，并且客户端ID为空- 已被CORS政策阻止：对预检请求的响应未通过访问控制检查：它没有HTTP正常状态

我已经添加了所有必需的标题。

请帮助

下面是我的网络通话

enter image description here

Answer 1

问题可能出在服务器端（您的后端），但是您可以尝试以明确的方式进行操作。您是否愿意尝试注入可以为您提供cros配置的bean：

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.filter.GenericFilterBean;

public class CORSFilter extends GenericFilterBean implements Filter {

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chaine)
            throws IOException, ServletException {
        HttpServletResponse httpResponse = (HttpServletResponse)response;
        httpResponse.setHeader("Access-Control-Allow-Origin", "*");
        httpResponse.setHeader("Access-Control-Allow-Methods", "*");
        httpResponse.setHeader("Access-Control-Allow-Headers", "*");
        httpResponse.setHeader("Access-Control-Allow-Credentials", "false");
        httpResponse.setHeader("Access-Control-Max-Age", "3600");
        System.out.println("****************** CORS Configuration Completed *******************");
        chaine.doFilter(request, response);
    }

}

在主类中，尝试像这样注入Bean：

@Bean
    public FilterRegistrationBean crosFilterRegistration(){
        FilterRegistrationBean registrationBean = new FilterRegistrationBean(new CORSFilter());
        registrationBean.setName("CORS Filter");
        registrationBean.addUrlPatterns("/*");
        registrationBean.setOrder(1);
        return registrationBean;
    }

希望这对您或其他任何人都有用：）

已被CORS政策阻止：对预检请求的响应未通过访问控制检查：它没有HTTP正常状态

1 个答案: