Android Open Source - student_travel_app Query Handler

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License

The source code is released under:

Apache License

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Java Source Code

package model;
/*from   w  w w .java 2 s  . c  o  m*/
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLDecoder;
import java.util.HashMap;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import util.Util;

import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;

import dao.DBManager;

public class QueryHandler implements HttpHandler
{

  /**
   * username&token&keyword&pagenum
   * all url encoded
   * */
  @Override
  public void handle(HttpExchange exchange) throws IOException
  {
    try
    {
      InputStream is = exchange.getRequestBody();
      byte [] buf = new byte[Constant.BUFFER_SIZE];
      int read = is.read(buf, 0, Constant.BUFFER_SIZE);
      String data = new String(buf, 0, read);
      
      Util.Log(Constant.LOG_LEVEL_INFO, "Receive query request : "
      + URLDecoder.decode(URLDecoder.decode(data, "UTF-8"), "UTF-8"), "QueryHandler");
      
      HashMap<String, String> params = Util.getParams(data);
      
      String token = DBManager.getDBManager().getToken(params.get("username"));
      
      JSONObject response = new JSONObject();
      if (token.equals(params.get("token")))
      {
        response.put("result", "success");
        int searchType = Constant.SEARCH_BY_KEYWORD;
        try
        {
          searchType = Integer.parseInt(params.get("searchtype"));
        }
        catch (NumberFormatException e)
        {
          Util.Log(Constant.LOG_LEVEL_ERROR, e.getMessage(), "QueryHandler");
        }
        
        switch (searchType)
        {
        case Constant.SEARCH_BY_KEYWORD:
          response.put("spots", DBManager.getDBManager().getSpots(params.get("keyword"), 
              params.get("pagenum")));
          break;
        case Constant.SEARCH_BY_CITY:
          response.put("spots", DBManager.getDBManager().getSpotsByCity(params.get("keyword"), 
              params.get("pagenum")));
          break;
        default:
          response.put("spots", new JSONArray());
          break;
        }
      }
      else
      {
        response.put("result", "fail");
        response.put("reason", "invalid token");
      }
      
      byte [] responseBody = response.toString().getBytes("UTF-8");
      exchange.sendResponseHeaders(200, responseBody.length);
          OutputStream os = exchange.getResponseBody();
          os.write(responseBody);
          os.flush();
          os.close();
          
          Util.Log(Constant.LOG_LEVEL_INFO, "Send query response : " + new String(responseBody, "UTF-8"), "QueryHandler");
    }
    catch (IOException e)
    {
      Util.Log(Constant.LOG_LEVEL_ERROR, e.getMessage(), "QueryHandler");
    }
    catch (JSONException e)
    {
      Util.Log(Constant.LOG_LEVEL_ERROR, e.getMessage(), "QueryHandler");
    }
  }

}

Java Source Code List