HttpClient获取重定向地址的代码

来源：互联网发布：网络成瘾诊断标准编辑：程序博客网时间：2024/05/20 05:08
import org.apache.http.HttpEntity;import org.apache.http.HttpHost;import org.apache.http.HttpResponse;import org.apache.http.client.HttpClient;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpUriRequest;import org.apache.http.entity.ContentType;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.protocol.BasicHttpContext;import org.apache.http.protocol.ExecutionContext;import org.apache.http.protocol.HttpContext;import org.apache.http.util.EntityUtils;public class HttpClientDemo {/** * 获取重定向之后的网址信息 * @see HttpClient缺省会自动处理客户端重定向 * @see 即访问网页A后,假设被重定向到了B网页,那么HttpClient将自动返回B网页的内容 * @see 若想取得B网页的地址,就需要借助HttpContext对象,HttpContext实际上是客户端用来在多次请求响应的交互中,保持状态信息的 * @see 我们自己也可以利用HttpContext来存放一些我们需要的信息,以便下次请求的时候能够取出这些信息来使用 */public static void getRedirectInfo(){HttpClient httpClient = new DefaultHttpClient();HttpContext httpContext = new BasicHttpContext();HttpGet httpGet = new HttpGet("http://127.0.0.1:8088/blog/main.jsp");try {//将HttpContext对象作为参数传给execute()方法,则HttpClient会把请求响应交互过程中的状态信息存储在HttpContext中HttpResponse response = httpClient.execute(httpGet, httpContext);//获取重定向之后的主机地址信息,即"http://127.0.0.1:8088"HttpHost targetHost = (HttpHost)httpContext.getAttribute(ExecutionContext.HTTP_TARGET_HOST);//获取实际的请求对象的URI,即重定向之后的"/blog/admin/login.jsp"HttpUriRequest realRequest = (HttpUriRequest)httpContext.getAttribute(ExecutionContext.HTTP_REQUEST);System.out.println("主机地址:" + targetHost);System.out.println("URI信息:" + realRequest.getURI());HttpEntity entity = response.getEntity();if(null != entity){System.out.println("响应内容:" + EntityUtils.toString(entity, ContentType.getOrDefault(entity).getCharset()));EntityUtils.consume(entity);}} catch (Exception e) {e.printStackTrace();}finally{httpClient.getConnectionManager().shutdown();}}}
0 0