httpclientorg.apache.http.nohttpresponseexceptionhost端口failedtorespond错误原因和解决方法

httpclient org.apache.http.NoHttpResponseException host 端口failed to respond 错误原因和解决方法

import com.google.api.client.http.ByteArrayContent; import com.google.api.client.http.GenericUrl;

import

com.google.api.client.http.HttpBackOffUnsuccessfulRespo nseHandler;

import com.google.api.client.http.HttpContent;

import com.google.api.client.http.HttpHeaders;

import com.google.api.client.http.HttpRequest;

import com.google.api.client.http.HttpRequestFactory; import com.google.api.client.http.HttpResponse;

import com.google.api.client.http.HttpStatusCodes; import com.google.api.client.http.HttpTransport;

import

com.google.api.client.http.apache.ApacheHttpTransport; import com.google.api.client.util.BackOff;

import java.io.IOException;

import java.io.InputStream;

import https://www.360docs.net/doc/429123707.html,.ProxySelector;

import java.util.Map;

import java.util.Timer;

import java.util.TimerTask;

import java.util.concurrent.TimeUnit;

import javax.annotation.PreDestroy;

import lombok.Data;

import lombok.extern.slf4j.Slf4j;

import org.apache.http.HeaderElement;

import org.apache.http.HeaderElementIterator;

import org.apache.http.HttpHost;

import org.apache.http.conn.ClientConnectionManager; import

org.apache.http.conn.ConnectionKeepAliveStrategy; import

org.apache.http.conn.params.ConnManagerParams; import org.apache.http.conn.params.ConnPerRouteBean; import org.apache.http.conn.scheme.PlainSocketFactory; import org.apache.http.conn.scheme.Scheme;

import org.apache.http.conn.scheme.SchemeRegistry; import org.apache.http.conn.ssl.SSLSocketFactory; import org.apache.http.impl.client.DefaultHttpClient; import

org.apache.http.impl.client.DefaultHttpRequestRetryHandl

er;

import

org.apache.http.impl.conn.ProxySelectorRoutePlanner; import

org.apache.http.impl.conn.tsccm.ThreadSafeClientConnM anager;

import

org.apache.http.message.BasicHeaderElementIterator; import org.apache.http.params.BasicHttpParams;

import org.apache.http.params.HttpConnectionParams; import org.apache.http.params.HttpParams;

import org.apache.http.protocol.HTTP;

import org.apache.http.protocol.HttpContext;

/**

* @author Li Sheng

*/

@Slf4j

public class HttpClientUtils {

private static HttpRequestFactory requestFactory;

private static HttpTransport httpTransport;

private static final String CONTENT_TYPE_JSON = "application/json";

private static final int CACHE_SIZE = 4096;

static {

HttpParams params = new BasicHttpParams();

HttpConnectionParams.setStaleCheckingEnabled(params, false);

HttpConnectionParams.setSocketBufferSize(params, 245760); // 8k(8192) * 30

ConnManagerParams.setMaxTotalConnections(params, 400);

ConnManagerParams.setMaxConnectionsPerRoute(para ms, new ConnPerRouteBean(200));

SchemeRegistry registry = new SchemeRegistry();

registry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));

registry.register(new Scheme("https", SSLSocketFactory.getSocketFactory(), 443));

ClientConnectionManager connectionManager = new ThreadSafeClientConnManager(params, registry);

DefaultHttpClient defaultHttpClient = new DefaultHttpClient(connectionManager, params);

defaultHttpClient.setHttpRequestRetryHandler(new DefaultHttpRequestRetryHandler(0, false));

defaultHttpClient

.setRoutePlanner(new ProxySelectorRoutePlanner(registry,

ProxySelector.getDefault()));

ConnectionKeepAliveStrategy connectionKeepAliveStrategy = new ConnectionKeepAliveStrategy() {

@Override

public long

getKeepAliveDuration(org.apache.http.HttpResponse httpResponse,

HttpContext httpContext) {

return 20 * 1000; // 20 seconds,because tomcat default keep-alive timeout is 20s

}

};

defaultHttpClient.setKeepAliveStrategy(connectionKeepAli veStrategy);

httpTransport = new

ApacheHttpTransport(defaultHttpClient);

requestFactory =

httpTransport.createRequestFactory();

}

@Data

public static class PostParam {

private Integer connectTimeoutMills; // 可选,默认

20s

private Integer readTimeoutMills; // 可选，默认20s private Map headers; // 可选

private String url; //必填

private String postJson; //必填

private Boolean readResponseData; //必填：是否需要读取数据。如果不需要返回结果,设置false

private BackOff backOff; //可选,重试机制策略

private String authorization; //可选

public PostParam(String url, String postJson, boolean readResponseData) {

this.url = url;

this.postJson = postJson;

this.readResponseData = readResponseData;

}

}

public static String postWithJson(PostParam postParam) {

GenericUrl genericUrl = new

GenericUrl(postParam.getUrl());

HttpContent httpContent =

ByteArrayContent.fromString(null,

postParam.getPostJson());

HttpResponse httpResponse = null;

try {

HttpRequest httpRequest =

requestFactory.buildPostRequest(genericUrl, httpContent);

if (postParam.getConnectTimeoutMills() != null) {

httpRequest.setConnectTimeout(postParam.getConnectTi meoutMills());

}

if (postParam.getReadTimeoutMills() != null) {

httpRequest.setReadTimeout(postParam.getReadTimeout Mills());

}

if (postParam.getBackOff() != null) {

httpRequest.setUnsuccessfulResponseHandler(

new HttpBackOffUnsuccessfulResponseHandler(postParam.ge tBackOff()));

}

HttpHeaders httpHeaders = new HttpHeaders();

httpHeaders.setContentType(CONTENT_TYPE_JSON);

Map headers = postParam.getHeaders();

if (headers != null && headers.size() > 0) {

headers.forEach(httpHeaders::set);

}

if (postParam.getAuthorization() != null

&& !postParam.equals("")) {

httpHeaders.setAuthorization(postParam.getAuthorization( ));

}

httpRequest.setHeaders(httpHeaders);

httpResponse = httpRequest.execute();

if (httpResponse.getStatusCode() !=

HttpStatusCodes.STATUS_CODE_OK) {

log.error("http status not 200.

param:{},status:{},msg:{}", postParam,

httpResponse.getStatusCode(), httpResponse.getStatusMessage());

return null;

}

Boolean readResponseData =

postParam.getReadResponseData();

if (readResponseData != null && readResponseData) {

InputStream inputStream = httpResponse.getContent();

if (inputStream != null) {

StringBuffer out = new StringBuffer();

byte[] b = new byte[CACHE_SIZE];

for (int n; (n = inputStream.read(b)) != -1; ) {

out.append(new String(b, 0, n));

}

return out.toString();

}

}

} catch (Exception e) {

log.error("post exception,param:{}", postParam, e);

} finally {

try {

if (httpResponse != null) {

httpResponse.disconnect();

}

} catch (Exception e) {

log.error("httpResponse disconnect exception", e);

}

}

return null;

}

@PreDestroy

public static void destory() {

try {

https://www.360docs.net/doc/429123707.html,("httpTransport shutdown now....");

httpTransport.shutdown();

} catch (IOException e) {

log.error("shut down httpTransport exception", e);

} }

}