React代理不工作http代理中间件

Question

我在react应用程序中遇到了很多CORS问题，我做了很多研究，发现我必须使用代理。

我尝试在包中使用代理。通过添加

"proxy": "https://api.clashroyale.com/",

然后我尝试删除上面的内容并创建setupProxy。包含以下内容的js：

const { createProxyMiddleware } = require('http-proxy-middleware');

module.exports = function(app) {
  app.use(
    '/v1/players',
    createProxyMiddleware({
      target: 'https://api.clashroyale.com/',
      changeOrigin: true,
    })
  );
};

我的请求在应用程序中看起来像这样。点击按钮时会发生这种情况：

const clicksearch = () => {
        const headers = {
            "Authorization": "Bearer token",
            "Content-Type": "application/json",
        }
        axios.get("v1/players/#123TAG", {headers})
            .then(response => {
                console.log(response.data);
            })
            .catch((error) => {
                console.log('error ' + error);
            });
}

我也尝试在. get中使用https://api.clashroyale.com/v1/players/#123TAG，但也没有运气。任何关于如何解决这个问题的提示都是惊人的

使用时从服务器得到的响应https://api.clashroyale.com/v1/players/#123TAGas get请求

Access to XMLHttpRequest at
 'https://api.clashroyale.com/v1/players/%232Y900L99' from origin 
'http://localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

而我在使用v1/Player/#123TAG时得到的反应是

GET http://localhost:3000/v1/players/%232Y900L99 403 (Forbidden)

Answer 1

您可以在后端执行CORS控制。在此问题之前，超文本传输协议-代理-中间件代理在React js和Spring Boot项目中不工作。GET API返回415状态错误（也许你也可以帮我：））我也阻止了这个问题。我就那样解决了；

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

@Component
public class SimpleCORSFilter implements Filter {

    private final Logger log = LoggerFactory.getLogger(SimpleCORSFilter.class);

    public SimpleCORSFilter() {
        log.info("SimpleCORSFilter init");
    }

    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {

        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) res;

        response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin"));
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Headers", "Content-Type, Accept, X-Requested-With, remember-me");

        chain.doFilter(req, res);
    }

    @Override
    public void init(FilterConfig filterConfig) {
    }

    @Override
    public void destroy() {
    }

}