src/jalview/ws/HttpClientUtils.java

   1 package jalview.ws;
   2
   3 import java.io.BufferedReader;
   4 import java.io.IOException;
   5 import java.io.InputStreamReader;
   6 import java.util.List;
   7
   8 import org.apache.http.HttpEntity;
   9 import org.apache.http.HttpResponse;
  10 import org.apache.http.NameValuePair;
  11 import org.apache.http.client.ClientProtocolException;
  12 import org.apache.http.client.HttpClient;
  13 import org.apache.http.client.entity.UrlEncodedFormEntity;
  14 import org.apache.http.client.methods.HttpPost;
  15 import org.apache.http.impl.client.DefaultHttpClient;
  16
  17 /**
  18  * Helpful procedures for working with services via HTTPClient
  19  * @author jimp
  20  *
  21  */
  22 public class HttpClientUtils
  23 {
  24   /**
  25    * do a minimal HTTP post with URL-Encoded parameters passed in the Query
  26    * string
  27    *
  28    * @param postUrl
  29    * @param vals
  30    * @return Reader containing content, if any, or null if no entity returned.
  31    * @throws IOException
  32    * @throws ClientProtocolException
  33    * @throws Exception
  34    */
  35   public static BufferedReader doHttpUrlPost(String postUrl,
  36           List<NameValuePair> vals) throws ClientProtocolException,
  37           IOException
  38   {
  39     HttpClient httpclient = new DefaultHttpClient();
  40     HttpPost httppost = new HttpPost(postUrl);
  41     UrlEncodedFormEntity ue = new UrlEncodedFormEntity(vals, "UTF-8");
  42     httppost.setEntity(ue);
  43     HttpResponse response = httpclient.execute(httppost);
  44     HttpEntity resEntity = response.getEntity();
  45
  46     if (resEntity != null)
  47     {
  48       BufferedReader r = new BufferedReader(new InputStreamReader(
  49               resEntity.getContent()));
  50       return r;
  51     }
  52     else
  53     {
  54       return null;
  55     }
  56   }
  57
  58 }