com.waspring.framework.antenna.service.http.HttpClientUtil Maven / Gradle / Ivy
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package com.waspring.framework.antenna.service.http;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.apache.log4j.Logger;
import com.waspring.framework.antenna.config.util.StreamUtil;
import com.waspring.framework.antenna.core.util.ExceptionUtil;
import com.waspring.framework.antenna.core.util.LogUtil;
public class HttpClientUtil {
private static Logger log = Logger.getLogger(HttpClientUtil.class);
/**
* 遠程請求數據，get请求
*
* @throws IOException
*/
public static RemoteEntry get(String remoteUrl, String charset) {
RemoteEntry entry = null;
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpget = new HttpGet(remoteUrl);
httpget.getParams().setParameter("http.protocol.allow-circular-redirects", true);
HttpResponse response = null;
int code = -1;
String data = "";
try {
response = httpClient.execute(httpget);
code = response.getStatusLine().getStatusCode();
} catch (IOException e) {
data = ExceptionUtil.getOutTrace(e);
LogUtil.error(log, data);
//// 因为这里错误，服务端估计也响应失败了，所以直接返回结果了
return new RemoteEntry(code, "远程请求失败:" + ExceptionUtil.parseException(e));
}
HttpEntity entity = response.getEntity();
try {
if (entity != null) {
InputStream in = entity.getContent();
data = StreamUtil.convertStreamToString(in, charset);
}
} catch (Exception e) {
data = ExceptionUtil.getOutTrace(e);//// 客户端处理失败的情况，直接返回
LogUtil.error(log, data);
return new RemoteEntry(code, "可能远程请求已经成功了，客户端处理失败：" + ExceptionUtil.parseException(e));
}
return new RemoteEntry(code, data);
}
/**
* 遠程請求提交，post请求
*
* @throws IOException
*/
public static RemoteEntry post(String remoteUrl, Map data) throws IOException {
return post(remoteUrl, data, "UTF-8");
}
/**
* 模拟页面提交
*
* @param reqUrl
* 提交url
* @param parameters
* 提交参数
* @param charSet
* 字符集 比如 UTF-8
* @return 返回请求结果
*/
public static RemoteEntry post(String reqUrl, Map parameters, String charSet) {
return post(reqUrl, parameters, "UTF-8", "application/x-www-form-urlencoded;charset=UTF-8");
}
/**
* 使用httpclient 4.4 实现模拟的post请求
*
* 1、创建CloseableHttpClient对象。
* 2、创建请求方法的实例，并指定请求URL。如果需要发送GET请求，创建HttpGet对象；如果需要发送POST请求，创建HttpPost对象。
* 3、如果需要发送请求参数，可可调用setEntity(HttpEntity
* entity)方法来设置请求参数。setParams方法已过时（4.4.1版本）。
* 4、调用HttpGet、HttpPost对象的setHeader(String name, String
* value)方法设置header信息，或者调用setHeaders(Header[] headers)设置一组header信息。
* 5、调用CloseableHttpClient对象的execute(HttpUriRequest
* request)发送请求，该方法返回一个CloseableHttpResponse。
* 6、调用HttpResponse的getEntity()方法可获取HttpEntity对象，该对象包装了服务器的响应内容。程序可通过该对象获取服务器的响应内容；调用CloseableHttpResponse的getAllHeaders()、getHeaders(String
* name)等方法可获取服务器的响应头。
* 7、释放连接。无论执行方法是否成功，都必须释放连接
*
*
*/
public static RemoteEntry post(String url, Map parameters, String encoding, String contentType) {
String data = "";
RemoteEntry entry = null;
// 创建httpclient对象
CloseableHttpClient client = HttpClients.createDefault();
// 创建post方式请求对象
HttpPost httpPost = new HttpPost(url);
// 装填参数
List nvps = new ArrayList();
if (parameters != null) {
for (Object key : parameters.keySet()) {
nvps.add(new BasicNameValuePair(String.valueOf(key), String.valueOf(parameters.get(key))));
}
}
try {
// 设置参数到请求对象中
httpPost.setEntity(new UrlEncodedFormEntity(nvps, encoding));
} catch (UnsupportedEncodingException e) {
data = ExceptionUtil.getOutTrace(e);
LogUtil.error(log, data);
return new RemoteEntry(-1, "编码参数传入错误，请求失败！");
}
LogUtil.info(log, "请求地址：" + url + ",参数:" + nvps.toString());
// 设置header信息
// 指定报文头【Content-type】、【User-Agent】
httpPost.setHeader("Content-type", contentType);
httpPost.setHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
// 执行请求操作，并拿到结果（同步阻塞）
CloseableHttpResponse response = null;
int code = -1;
try {
response = client.execute(httpPost);
if (response != null) {
code = response.getStatusLine().getStatusCode();
}
} catch (IOException e) {
//// 这种情况可能服务端响应都没成功
/// 先写日志
data = ExceptionUtil.getOutTrace(e);
LogUtil.error(log, data);
// 判断code
return new RemoteEntry(code, "远程请求失败：" + ExceptionUtil.parseException(e));
}
try {
// 获取结果实体
HttpEntity entity = response.getEntity();
if (entity != null) {
// 按指定编码转换结果实体为String类型
data = EntityUtils.toString(entity, encoding);
EntityUtils.consume(entity);
}
} catch (IOException e) {
/// 这种情况下说明服务端可能是响应成功了的，所以需要将参数记录下来，让人工去处理
data = ExceptionUtil.getOutTrace(e);
LogUtil.error(log, data);
// 判断code
return new RemoteEntry(code, "可能远程请求已经成功了，客户端处理失败：" + ExceptionUtil.parseException(e));
} finally {
if (response != null) {
// 释放链接
try {
response.close();
} catch (IOException e) {
LogUtil.error(log, ExceptionUtil.getOutTrace(e));
}
}
}
return new RemoteEntry(code, data);
}
}