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 {

privateHttpClientBuilder 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);
}
}