HttpClient学习之三实现Basic认证

引用到的jar： httpclient-4.5.jar; httpcore-4.4.1.jar; commons-logging-1.2.jar; common-codec-1.9.jar

import java.io.IOException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;

public class HttpClientWithBasicAuth {
	
	private	HttpClientBuilder httpClientBuilder;
	private CloseableHttpClient closeableHttpClient;

	public String doGetMethod(String host, int port, String URI){
		if( closeableHttpClient == null ){
			//createCloseableHttpClient();
			createCloseableHttpClientWithBasicAuth();
		}
		String result = "";
		HttpGet httpGet = null;
		HttpResponse httpResponse = null;
		HttpEntity entity = null;
		httpGet = new HttpGet("http://"+host+URI);
		try {
			httpResponse = closeableHttpClient.execute(httpGet);
			entity = httpResponse.getEntity();
			if( entity != null ){
				result = EntityUtils.toString(entity);
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
			
		return result;
	}
	
	
	public void closeHttpClient(){
		if( closeableHttpClient != null ){
			try {
				closeableHttpClient.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
	
	public void createCloseableHttpClient(){
		if( closeableHttpClient == null ){
			// 创建HttpClientBuilder
			httpClientBuilder = HttpClientBuilder.create();
			// HttpClient
			closeableHttpClient = httpClientBuilder.build();
		}
	}
	
	public void createCloseableHttpClientWithBasicAuth(){
		if( closeableHttpClient == null ){
			// 创建HttpClientBuilder
			httpClientBuilder = HttpClientBuilder.create();
			// 设置BasicAuth
			CredentialsProvider provider = new BasicCredentialsProvider();
		    // Create the authentication scope
		    AuthScope scope = new AuthScope(AuthScope.ANY_HOST, AuthScope.ANY_PORT, AuthScope.ANY_REALM);
		    // Create credential pair，在此处填写用户名和密码
		    UsernamePasswordCredentials credentials = new UsernamePasswordCredentials("root", "superuser");
		    // Inject the credentials
		    provider.setCredentials(scope, credentials);
		    // Set the default credentials provider
		    httpClientBuilder.setDefaultCredentialsProvider(provider);
			// HttpClient
			closeableHttpClient = httpClientBuilder.build();
		}
	}
	
	/*private HttpClientContext createBasicAuthContext(HttpHost host,String username, String password) {
	    CredentialsProvider credsProvider = new BasicCredentialsProvider();
	    Credentials defaultCreds = new UsernamePasswordCredentials(username, password);
	    credsProvider.setCredentials(new AuthScope(host.getHostName(), host.getPort()), defaultCreds);

	    AuthCache authCache = new BasicAuthCache();
	    BasicScheme basicAuth = new BasicScheme();
	    authCache.put(host, basicAuth);

	    HttpClientContext context = HttpClientContext.create();
	    context.setCredentialsProvider(credsProvider);
	    context.setAuthCache(authCache);
	    return context;
	}*/

	public static void main(String args[])  {
		String host = "10.104.203.166";
		int port = 8080;
		String URI = "/redfish/v1/SessionService/Sessions";
		
		HttpClientWithBasicAuth httpClient = new HttpClientWithBasicAuth();
		String result = httpClient.doGetMethod(host, port, URI);
		System.out.println(result);
	}
}