NonRepeatableRequestException: Cannot retry request with a non-repeatable request entity

报错信息：​​org.apache.http.client.NonRepeatableRequestException: Cannot retry request with a non-repeatable request entity​​ 解决方案：

public static InputStream getAsStream(String url) {
    try (CloseableHttpClient client = HttpClients.createDefault();
         CloseableHttpResponse response = client.execute(new HttpGet(url))) {
        HttpEntity httpEntity = response.getEntity();
        // 包装一层解决
        BufferedHttpEntity bhe = new BufferedHttpEntity(httpEntity);
        return bhe.getContent();
    } catch (IOException e) {
        LOGGER.error("doGet failed: " + e.getMessage());
    }
    return null;
}

参考：
​​​stackoverflow​​

Going to buffer response body of large or unknown size. Using getResponseBodyAsStream instead is recommended.

使用HttpClient，大量报出​​Going to buffer response body of large or unknown size. Using getResponseBodyAsStream instead is recommended​​的WARN日志，定位到HttpClient的源码如下：

public abstract class HttpMethodBase implements HttpMethod {
    public byte[] getResponseBody() throws IOException {
        if (responseBody == null) {
            InputStream instream = getResponseBodyAsStream();
            if (instream != null) {
                long contentLength = getResponseContentLength();
                if (contentLength > 2147483647L) {
                    throw new IOException("Content too large to be buffered: " + contentLength + " bytes");
                }
                int limit = getParams().getIntParameter("http.method.response.buffer.warnlimit", 1048576);
                if (contentLength == -1L || contentLength > (long) limit) {
                    LOG.warn("Going to buffer response body of large or unknown size. Using getResponseBodyAsStream instead is recommended.");
                }
                LOG.debug("Buffering response body");
                ByteArrayOutputStream outstream = new ByteArrayOutputStream(contentLength <= 0L ? 4096: (int) contentLength);
                byte buffer[] = new byte[4096];
                int len;
                while ((len = instream.read(buffer)) > 0) {
                    outstream.write(buffer, 0, len);
                }
                outstream.close();
                setResponseStream(null);
                responseBody = outstream.toByteArray();
            }
        }
        return responseBody;
    }
}

报WARN的条件​​(contentLength == -1) || (contentLength > limit)​​，即返回的HTTP头没有指定contentLength，或contentLength大于上限（默认1M）。如果能确定返回结果的大小对程序没有显著影响，这个WARN就可以忽略，可在日志配置中把HttpClient的日志级别调到ERROR。

不过这都是忽略潜在的问题，并没有解决问题。

HttpClient建议使用InputStream getResponseBodyAsStream()代替byte[] getResponseBody()。对于返回结果很大或无法预知的情况，使用InputStreamgetResponseBodyAsStream()，避免byte[] getResponseBody()可能带来的内存耗尽问题。

解决方案，将stream转化为string：

private String convert(InputStream inputStream) throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(inputStream));
    StringBuilder sb = new StringBuilder();
    String str;
    while ((str = br.readLine()) != null) {
        sb.append(str);
    }
    return sb.toString();
}

ConnectException: Connection refused

使用企业微信推送消息时遇到的问题，具体的报错信息：

java.lang.Exception: org.apache.http.conn.HttpHostConnectException: Connect to qyapi.weixin.qq.com:443 [qyapi.weixin.qq.com/81.69.87.29, qyapi.weixin.qq.com/81.69.54.213] failed: Connection refused
    报错行
    at com.xy.cloudiview.common.util.HttpUtil.doGet(HttpUtil.java:49)
    at com.xy.cloudiview.common.util.SendWeChatUtil.getToken(SendWeChatUtil.java:193)
    at com.xy.cloudiview.common.util.SendWeChatUtil.sendWeChat(SendWeChatUtil.java:57)
    at com.xy.cloudiview.datasetsubscript.business.service.impl.TableWarnServiceImpl.sendWeChat(TableWarnServiceImpl.java:330)
    at com.xy.cloudiview.datasetsubscript.business.service.impl.TableWarnServiceImpl.sendMsg(TableWarnServiceImpl.java:417)
    at com.xy.cloudiview.datasetsubscript.business.service.impl.TableWarnServiceImpl.executeTableWarnJob(TableWarnServiceImpl.java:99)
    at com.xy.cloudiview.datasetsubscript.business.xxljob.IviewTableWarnJobHandler.execute(IviewTableWarnJobHandler.java:45)
    at com.ppdai.job.core.thread.JobThread.run(JobThread.java:142)
Caused by: org.apache.http.conn.HttpHostConnectException: Connect to qyapi.weixin.qq.com:443 [qyapi.weixin.qq.com/81.69.87.29, qyapi.weixin.qq.com/81.69.54.213] failed: Connection refused
    at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:156)
    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:376)
    at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:393)
    at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236)
    at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:186)
    at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)
    at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)
    at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:108)
    at com.xy.cloudiview.common.util.HttpUtil.doGet(HttpUtil.java:39)
    ... 7 common frames omitted
Caused by: java.net.ConnectException: Connection refused
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:368)
    at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:142)
    ... 17 common frames omitted

​​HttpUtil.doGet​​方法定义：

public static String doGet(String url) throws Exception {
    // 创建Httpclient对象
    CloseableHttpClient httpclient = HttpClients.createDefault();
    // 创建http GET请求
    HttpGet httpGet = new HttpGet(url);
    CloseableHttpResponse response = null;
    String content = "";
    try {
        // 执行请求
        response = httpclient.execute(httpGet);
        // 判断返回状态是否为200
        if (response.getStatusLine().getStatusCode() == 200) {
            //请求体内容
            content = EntityUtils.toString(response.getEntity(), "UTF-8");
        } else {
            log.error("doget error, url:{}, return code:{}", url,
                    response.getStatusLine().getStatusCode());
        }
    } catch (Exception e) {
        // 报错行
        throw new Exception(e);
    } finally {
        if (response != null) {
            response.close();
        }
        //相当于关闭浏览器
        httpclient.close();
    }
    return content;
}

没有什么意义的参考：

参考

  • ​​HttpClient警告​​