httpClient 设置代理请求接口

来源:互联网 发布:视频加背景音乐软件 编辑:程序博客网 时间:2024/06/02 18:43

之前再做一个httpClient接口对接的时候,在公司遇到一个问题,一直报请求超时,当时以为是程序问题,后来把同样的代码带回家中请求下,却又可以,

于是就定位到是网络的问题,一问才知道公司的网络是做了代理的,于是问题就好办了,网上找了下解决如下(请见红色字体部分):


package com.besttone.utils.common;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Map;


import org.apache.commons.httpclient.DefaultHttpMethodRetryHandler;
import org.apache.commons.httpclient.Header;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.HttpMethod;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.UsernamePasswordCredentials;
import org.apache.commons.httpclient.auth.AuthScope;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;


/**
 * <p>
 * HTTP公用类 所需包:Commons-httpclient.jar,commons-codec-1.3.jar 学习参见网址:
 * https://www.ibm.com/developerworks/cn/opensource/os-cn-crawler/
 * </p>
 * 
 * 
 */
public class HttpClientUtils {


public static void main(String arg[]) throws Exception {
String url = "http://www.baidu.com/";
// getDoGetURL2(url,"utf-8");//测试ok
// getDoGetURL(url,"utf-8");//测试ok
getDoPostResponseDataByURL(url, null, "utf-8", true,true); // 测试ok

}


/**
* <p>
* httpClient的get请求方式
* </p>

* @param url
* @param charset
*            = ="utf-8";
* @return
* @throws Exception
*/
public static String getDoGetURL(String url, String charset)
throws Exception {


HttpClient client = new HttpClient();
GetMethod method1 = new GetMethod(url);


if (null == url || !url.startsWith("http")) {
throw new Exception("请求地址格式不对");
}


// 设置请求的编码方式
if (null != charset) {
method1.addRequestHeader("Content-Type",
"application/x-www-form-urlencoded; charset=" + charset);
} else {
method1.addRequestHeader("Content-Type",
"application/x-www-form-urlencoded; charset=" + "utf-8");
}
int statusCode = client.executeMethod(method1);


if (statusCode != HttpStatus.SC_OK) { // 打印服务器返回的状态
System.out.println("Method failed: " + method1.getStatusLine());
}
// 返回响应消息
byte[] responseBody = method1.getResponseBodyAsString().getBytes(
method1.getResponseCharSet());
// 在返回响应消息使用编码(utf-8或gb2312)
String response = new String(responseBody, "utf-8");
System.out.println("------------------response:" + response);
// 释放连接
method1.releaseConnection();
return response;
}


/**
* <p>
* httpClient的get请求方式2
* </p>

* @param url
* @param charset
*            = ="utf-8";
* @return
* @throws Exception
*/
public static String getDoGetURL2(String url, String charset)
throws Exception {
/*
* 使用 GetMethod 来访问一个 URL 对应的网页,实现步骤: 1:生成一个 HttpClinet 对象并设置相应的参数。
* 2:生成一个 GetMethod 对象并设置响应的参数。 3:用 HttpClinet 生成的对象来执行 GetMethod 生成的Get
* 方法。 4:处理响应状态码。 5:若响应正常,处理 HTTP 响应内容。 6:释放连接。
*/


/* 1 生成 HttpClinet 对象并设置参数 */
HttpClient httpClient = new HttpClient();
// 设置 Http 连接超时为5秒
httpClient.getHttpConnectionManager().getParams()
.setConnectionTimeout(5000);


/* 2 生成 GetMethod 对象并设置参数 */
GetMethod getMethod = new GetMethod(url);
// 设置 get 请求超时为 5 秒
getMethod.getParams().setParameter(HttpMethodParams.SO_TIMEOUT, 5000);
// 设置请求重试处理,用的是默认的重试处理:请求三次
getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,
new DefaultHttpMethodRetryHandler());


String response = "";
/* 3 执行 HTTP GET 请求 */
try {
int statusCode = httpClient.executeMethod(getMethod);
/* 4 判断访问的状态码 */
if (statusCode != HttpStatus.SC_OK) {
System.err.println("Method failed: "
+ getMethod.getStatusLine());
}


/* 5 处理 HTTP 响应内容 */
// HTTP响应头部信息,这里简单打印
Header[] headers = getMethod.getResponseHeaders();
for (Header h : headers)
System.out
.println(h.getName() + "------------ " + h.getValue());


// 读取 HTTP 响应内容,这里简单打印网页内容
byte[] responseBody = getMethod.getResponseBody(); // 读取为字节数组
response = new String(responseBody, charset);
System.out.println("----------response:" + response);


// 读取为 InputStream,在网页内容数据量大时候推荐使用
// InputStream response = getMethod.getResponseBodyAsStream();


} catch (HttpException e) {
// 发生致命的异常,可能是协议不对或者返回的内容有问题
System.out.println("Please check your provided http address!");
e.printStackTrace();
} catch (IOException e) {
// 发生网络异常
e.printStackTrace();
} finally {
/* 6 .释放连接 */
getMethod.releaseConnection();
}
return response;
}


/**
* <p>
* 执行一个HTTP POST请求,返回请求响应的HTML
* </p>

* @param url
*            请求的URL地址
* @param params
*            请求的查询参数,可以为null
* @param charset
*            字符集
* @param pretty
*            是否美化
* @return 返回请求响应的HTML
*/
public static String getDoPostResponseDataByURL(String url,
Map<String, String> params, String charset, boolean pretty,boolean isProxy) {


StringBuffer response = new StringBuffer();


HttpClient client = new HttpClient();
HttpMethod method = new PostMethod(url);
if (isProxy){
 
setProxy(client);  
}  

              


         client.getParams().setAuthenticationPreemptive(true);
// 设置Http Post数据
if (params != null) {
HttpMethodParams p = new HttpMethodParams();
for (Map.Entry<String, String> entry : params.entrySet()) {
p.setParameter(entry.getKey(), entry.getValue());
}
method.setParams(p);
}
try {
client.executeMethod(method);
if (method.getStatusCode() == HttpStatus.SC_OK) {
// 读取为 InputStream,在网页内容数据量大时候推荐使用
BufferedReader reader = new BufferedReader(
new InputStreamReader(method.getResponseBodyAsStream(),
charset));
String line;
while ((line = reader.readLine()) != null) {
if (pretty)
response.append(line).append(
System.getProperty("line.separator"));
else
response.append(line);
}
reader.close();
}
} catch (IOException e) {
System.out.println("执行HTTP Post请求" + url + "时,发生异常!");
e.printStackTrace();
} finally {
method.releaseConnection();
}
System.out.println("--------------------" + response.toString());
return response.toString();
}


/** 
* 设置代理 
* @createDate: Apr 2, 2011 6:03:30 PM 
* @param client 
*/  
private static void setProxy(HttpClient client) {  
// 设置代理  
//设置代理服务器的ip地址和端口  
client.getHostConfiguration().setProxy("192.168.19.9", 80);  
//使用抢先认证  
client.getParams().setAuthenticationPreemptive(true);  
// httpClient.getState().setProxyCredentials(AuthScope.ANY, new UsernamePasswordCredentials("llying.iteye.com","llying")); 
}  



}

0 0
原创粉丝点击