Example of getting url information after httpclient redirects

  • 2020-04-01 02:58:04
  • OfStack


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 {
 
 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 {
   //Pass the HttpContext object as an argument to the execute() method, and HttpClient stores the state information from the request-response interaction in the HttpContext
   HttpResponse response = httpClient.execute(httpGet, httpContext);
   //Gets the host address information after the redirect, i.e. "HTTP: arbitration.0.0.1:8088"
   HttpHost targetHost = (HttpHost)httpContext.getAttribute(ExecutionContext.HTTP_TARGET_HOST);
   //Gets the URI of the actual request object, which is "/blog/admin/login.jsp" after the redirect
   HttpUriRequest realRequest = (HttpUriRequest)httpContext.getAttribute(ExecutionContext.HTTP_REQUEST);
   System.out.println(" The host address :" + targetHost);
   System.out.println("URI information :" + realRequest.getURI());
   HttpEntity entity = response.getEntity();
   if(null != entity){
    System.out.println(" Response content :" + EntityUtils.toString(entity, ContentType.getOrDefault(entity).getCharset()));
    EntityUtils.consume(entity);
   }
  } catch (Exception e) {
   e.printStackTrace();
  }finally{
   httpClient.getConnectionManager().shutdown();
  }
 }
}


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