springcloud使用webhook自動更新配置檔案的時候報400

使用springcloud的過程中，使用webhook自動發送一個post到configserver，在自己本機上測試可行，但是在碼雲或者github上就報下邊的錯誤。

{“timestamp”:“2020-12-13T07:01:11.392+00:00”,“status”:400,“error”:“Bad Request”,“message”:"",“path”:"/actuator/bus-refresh/"}

原因：

因為webhook發送post的時候攜帶了其他的資訊，是以可任意用過攔截器把對應的多餘的資訊攔截掉。

1. 添加注解@ServletComponentScan(“com.englishcode.config.interceptors”)
2. 編寫對應的攔截器

//編寫對應的攔截器對webhook發來的連接配接進行處理
package com.englishcode.config.interceptors;

import org.springframework.stereotype.Component;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import javax.servlet.http.HttpServletResponse;
import java.io.ByteArrayInputStream;
import java.io.IOException;

/**
 * @author cyl
 * @version 1.0
 * @date 2020/12/13 15:26
 */
@Component
public class WebHooksFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }

    @Override
    public void destroy() {
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest httpServletRequest = (HttpServletRequest) servletRequest;
        String url = new String(httpServletRequest.getRequestURI());

        if(!url.endsWith("/bus-refresh")){
            filterChain.doFilter(servletRequest,servletResponse);
            return;
        }
        RequestWrapper requestWrapper = new RequestWrapper(httpServletRequest);
        filterChain.doFilter(requestWrapper, servletResponse);
    }

    private class RequestWrapper extends HttpServletRequestWrapper {
        public RequestWrapper(HttpServletRequest request) {
            super(request);
        }

        @Override
        public ServletInputStream getInputStream() throws IOException {
            byte[] bytes = new byte[0];
            ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(bytes);
            ServletInputStream servletInputStream = new ServletInputStream() {
                @Override
                public int read() throws IOException {
                    return byteArrayInputStream.read();
                }

                @Override
                public boolean isFinished() {
                    return byteArrayInputStream.read() == -1 ? true : false;
                }

                @Override
                public boolean isReady() {
                    return false;
                }

                @Override
                public void setReadListener(ReadListener listener) {

                }
            };
            return servletInputStream;
        }
    }
}