RestTemplate异常Unexpected end of file from server

对方提供post接口，我来调用

我的服务是springboot单体应用，使用调用工具是RestTemplate，本地和别人联调是好的，一发到线上就报异常，异常信息如下：

2021-02-25 15:30:15,201 - [http-nio-8080-exec-4] ERROR c.o.o.o.exception.ExceptionHandle - 系统异常[bc0b373d-513c-4faa-9b27-f820e816dadd]====>{}
org.springframework.web.client.ResourceAccessException: I/O error on POST request for "http://116.228.238.186:32317/api/academic/online_class/only/enterClass": Unexpected end of file from server; nested exception is java.net.SocketException: Unexpected end of file from server
	at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:732)
	at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:680)
	at org.springframework.web.client.RestTemplate.postForObject(RestTemplate.java:435)
	at com.only.oc.openapi.api.TestAPI.test(TestAPI.java:40)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:209)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:877)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:783)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:866)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at com.github.xiaoymin.knife4j.spring.filter.SecurityBasicAuthFilter.doFilter(SecurityBasicAuthFilter.java:87)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at com.only.oc.openapi.config.mylog.LogFilter.doFilter(LogFilter.java:22)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:109)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:496)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1468)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.base/java.lang.Thread.run(Thread.java:836)
Caused by: java.net.SocketException: Unexpected end of file from server
	at java.base/sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:866)
	at java.base/sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:689)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1615)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1520)
	at java.base/java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:527)
	at org.springframework.http.client.SimpleClientHttpResponse.getRawStatusCode(SimpleClientHttpResponse.java:55)
	at org.springframework.web.client.DefaultResponseErrorHandler.hasError(DefaultResponseErrorHandler.java:51)
	at org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:754)
	at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:724)
	... 63 common frames omitted

查了才知道RestTemplate把对方的springcloude服务提供的接口，当成内部调用了，这里改成HttpClient调用后问题解决，附上方法：

    compile 'org.apache.httpcomponents:httpclient:4.5.6'

import org.apache.http.HeaderElement;
import org.apache.http.HeaderElementIterator;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ConnectionKeepAliveStrategy;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicHeaderElementIterator;
import org.apache.http.protocol.HTTP;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.Args;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.nio.charset.Charset;

/**
 * HTTP API调用辅助类
 * 
 * @author leo
 *
 */
public class HttpUtil {

    private static ConnectionKeepAliveStrategy myStrategy;

    static {
        myStrategy = (response, context) -> {
            HeaderElementIterator it = new BasicHeaderElementIterator(response.headerIterator(HTTP.CONN_KEEP_ALIVE));
            while (it.hasNext()) {
                HeaderElement he = it.nextElement();
                String param = he.getName();
                String value = he.getValue();
                if (value != null && param.equalsIgnoreCase("timeout")) {
                    return Long.parseLong(value) * 1000;
                }
            }
            return 60 * 1000;//如果没有约定，则默认定义时长为60s
        };
    }


    public static String post(String url, String jsonStr) throws IOException {
        // 创建httpClient
        CloseableHttpClient httpClient = HttpClients.custom().setConnectionManagerShared(true)
                .setKeepAliveStrategy(myStrategy)
                .evictExpiredConnections()
                .build();
        // 创建post请求方式实例
        HttpPost httpPost = new HttpPost(url);
        // 设置请求头 发送的是json数据格式
        httpPost.setHeader("Content-type", "application/json;charset=utf-8");
        httpPost.setHeader("Connection", "Close");
        // 设置参数---设置消息实体 也就是携带的数据
        StringEntity entity = new StringEntity(jsonStr, Charset.forName("UTF-8"));
        // 设置编码格式
        entity.setContentEncoding("UTF-8");
        // 发送Json格式的数据请求
        entity.setContentType("application/json");
        // 把请求消息实体塞进去
        httpPost.setEntity(entity);
        // 执行http的post请求
        CloseableHttpResponse httpResponse = httpClient.execute(httpPost);
        String result = EntityUtils.toString(httpResponse.getEntity(), "UTF-8");
        return result;
    }



    public static void main(String[] args) throws IOException {
        String url = "http://10.10.10.18:32317/api/academic/online_class/only/enterClass?sid=1002&timestamp=1614157200364&sign=42eda0433493bafc5eccbc033fe1ff79";
        String body = "{\"body\":{\"inRoomTime\":\"2021-02-24 16:18:09\",\"role\":\"STUDENT\",\"lessonId\":504,\"courseId\":56,\"userId\":186},\"dataId\":186,\"dataNumber\":\"186\",\"id\":\"1\",\"pushCount\":2,\"pushTime\":\"2021-02-24 17:01:30\",\"pushUrl\":\"http://116.228.238.186:32317/api/academic/online_class/only/enterClass?sid=1001&timestamp=1614157200364&sign=42eda0433493bafc5eccbc033fe1ff79\",\"sid\":1001,\"title\":\"课节-成员-进房间\",\"type\":\"lesson.member.in_room\"}";
        String resp = HttpUtil.post(url, body);
        System.out.println(resp);
	}
	
}

原文链接：https://blog.csdn.net/leopast/article/details/114112694

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