app.wz.HttpClient.java Source code

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Here is the source code for app.wz.HttpClient.java

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/***
   Copyright (c) 2009 
   Author: Stefan Klumpp <stefan.klumpp@gmail.com>
   Web: http://stefanklumpp.com
    
   Licensed under the Apache License, Version 2.0 (the "License"); you may
   not use this file except in compliance with the License. You may obtain
   a copy of the License at
  http://www.apache.org/licenses/LICENSE-2.0
   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
 */

package app.wz;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.zip.GZIPInputStream;
import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONObject;
import android.util.Log;

public class HttpClient {
    private static final String TAG = "HttpClient";

    public static String SendHttpPost(String URL, JSONObject jsonObjSend) {

        try {
            DefaultHttpClient httpclient = new DefaultHttpClient();
            HttpPost httpPostRequest = new HttpPost(URL);

            StringEntity se;
            se = new StringEntity(jsonObjSend.toString());

            // Set HTTP parameters
            httpPostRequest.setEntity(se);
            httpPostRequest.setHeader("Accept", "application/json");
            httpPostRequest.setHeader("Content-type", "application/json");
            httpPostRequest.setHeader("Accept-Encoding", "gzip"); // only set this parameter if you would like to use gzip compression

            long t = System.currentTimeMillis();
            HttpResponse response = (HttpResponse) httpclient.execute(httpPostRequest);
            Log.i(TAG, "HTTPResponse received in [" + (System.currentTimeMillis() - t) + "ms]");

            // Get hold of the response entity (-> the data):
            HttpEntity entity = response.getEntity();

            if (entity != null) {
                return EntityUtils.toString(entity);
                //            // Read the content stream
                //            InputStream instream = entity.getContent();
                //            Header contentEncoding = response.getFirstHeader("Content-Encoding");
                //            if (contentEncoding != null && contentEncoding.getValue().equalsIgnoreCase("gzip")) {
                //               instream = new GZIPInputStream(instream);
                //            }
                //
                //            // convert content stream to a String
                //            String resultString= convertStreamToString(instream);
                //            instream.close();
                //            resultString = resultString.substring(1,resultString.length()-1); // remove wrapping "[" and "]"
                //
                //            // Transform the String into a JSONObject
                //            JSONObject jsonObjRecv = new JSONObject(resultString);
                //            // Raw DEBUG output of our received JSON object:
                //            Log.i(TAG,"<JSONObject>\n"+jsonObjRecv.toString()+"\n</JSONObject>");
                //
                //            return jsonObjRecv;
            }

        } catch (Exception e) {
            // More about HTTP exception handling in another tutorial.
            // For now we just print the stack trace.
            e.printStackTrace();
        }
        return null;
    }

    private static String convertStreamToString(InputStream is) {
        /*
         * To convert the InputStream to String we use the BufferedReader.readLine()
         * method. We iterate until the BufferedReader return null which means
         * there's no more data to read. Each line will appended to a StringBuilder
         * and returned as String.
         * 
         * (c) public domain: http://senior.ceng.metu.edu.tr/2009/praeda/2009/01/11/a-simple-restful-client-at-android/
         */
        BufferedReader reader = new BufferedReader(new InputStreamReader(is));
        StringBuilder sb = new StringBuilder();

        String line = null;
        try {
            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return sb.toString();
    }

}