使用httpclient连接tomcat管理页问题，遇到过的请帮忙作答，谢谢！

apinglee 2008-07-01 09:59:22

用httpclient模拟实现用浏览器访问tomcat的管理页面，好像需要经过 HTTP Basic 认证。参考了http://www.ibm.com/developerworks/cn/java/j-lo-httpclient-j2ee/#N10060。但老是连接不成功。不是何原因？
代码如下：



import java.io.IOException;

import org.apache.commons.httpclient.*;

import org.apache.commons.httpclient.auth.AuthScope;

import org.apache.commons.httpclient.methods.GetMethod;

import org.apache.commons.httpclient.params.HttpMethodParams;

import org.apache.commons.httpclient.HttpClient; 

import org.apache.commons.httpclient.UsernamePasswordCredentials; 



public class GetSample {

	public static void main(String[] args) {

		//构造HttpClient的实例

		HttpClient httpClient = new HttpClient();

		

		httpClient.getState().setCredentials( new AuthScope("http://10.75.72.229", 8080, null), new UsernamePasswordCredentials("admin", "admin"));//10.75.72.229不是本机

		//httpClient.getState().setCredentials( null ,"http://10.75.72.229:8080/manager/status" , new UsernamePasswordCredentials( "admin" , "admin" ) );

		httpClient.getParams().setAuthenticationPreemptive(true);





		//创建GET方法的实例

		GetMethod getMethod = new GetMethod("http://10.75.72.229:8080/manager/status?XML=true");

		getMethod.setDoAuthentication( true );

		//使用系统提供的默认的恢复策略

		getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler());

		try {

			//执行getMethod

			int statusCode = httpClient.executeMethod(getMethod);

			if (statusCode != HttpStatus.SC_OK) {

				System.err.println("Method failed: " + getMethod.getStatusLine());

			}

			//读取内容 

			byte[] responseBody = getMethod.getResponseBody();

			//处理内容

			System.out.println(new String(responseBody));

		}

		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 {

			//释放连接

			getMethod.releaseConnection();

		}

	}

}

报错如下
2008-7-1 9:49:31 org.apache.commons.httpclient.HttpMethodDirector authenticateHost
警告: Required credentials not available for BASIC <any realm>@10.75.72.229:8080
2008-7-1 9:49:31 org.apache.commons.httpclient.HttpMethodDirector authenticateHost
警告: Preemptive authentication requested but no default credentials available
2008-7-1 9:49:31 org.apache.commons.httpclient.auth.AuthChallengeProcessor selectAuthScheme
信息: basic authentication scheme selected
2008-7-1 9:49:31 org.apache.commons.httpclient.HttpMethodDirector processWWWAuthChallenge
信息: Failure authenticating with BASIC 'Tomcat Manager Application'@10.75.72.229:8080
Method failed: HTTP/1.1 401
2008-7-1 9:49:31 org.apache.commons.httpclient.HttpMethodBase getResponseBody
警告: Going to buffer response body of large or unknown size. Using getResponseBodyAsStream instead is recommended.


<html>
<head>
<title>401 Unauthorized</title>
<style>

</style>
</head>
<body>
<h1>401 Unauthorized</h1>
<p>
You are not authorized to view this page. If you have not changed
any configuration files, please examine the file
<tt>conf/tomcat-users.xml</tt> in your installation. That
file will contain the credentials to let you use this webapp.
</p>
<p>
You will need to add <tt>manager</tt> role to the config file listed above.
For example:
<pre>
<role rolename="manager"/>
<user username="tomcat" password="s3cret" roles="manager"/>
</pre>
</p>
<p>
For more information - please see the
<a href="/docs/manager-howto.html">Manager App HOW-TO</a>.
</p>
</body>

</html>

...全文