I created an HttpURLConnection but how do I parse the data?

Question

I created an HttpURLConnection between a server. It is shown below

public class SimpleHTTPRequest {
public static void main(String[] args) {
  HttpURLConnection connection = null;
  OutputStreamWriter wr = null;
  BufferedReader rd  = null;
  StringBuilder sb = null;
  String line = null;


  try {
     URL serverAddress = new URL("myUrl");
      //set up out communications stuff
      connection = null;

      //Set up the initial connection
      connection = (HttpURLConnection)serverAddress.openConnection();
      connection.setRequestMethod("GET");
      connection.connect();


      //read the result from the server
      rd  = new BufferedReader(new InputStreamReader(connection.getInputStream()));
      sb = new StringBuilder();

      while ((line = rd.readLine()) != null)
      {
          sb.append(line + '\n');
          System.out.println(sb.toString());

      }


  } catch (MalformedURLException e) {
      e.printStackTrace();
  } catch (ProtocolException e) {
      e.printStackTrace();
  } catch (IOException e) {
      e.printStackTrace();
  }
  finally
  {
      //close the connection, set all objects to null
      connection.disconnect();
      rd = null;
      sb = null;
      wr = null;
      connection = null;
  }
  }
  }

After connecting to my server I get a response in this format, which is an HTML5 response.

event: data
data: {"target":1,"data":   {"text":"Home","number":0,"id":02123421,"likes":[],"newPost":true,"created":1458300896392,"edited":1458300896392},"type":"create"}

But how do I parse this information for instance lets say I want the "text" home to be set to my text view how do I specifiy?

Its not json its html5, I am streaming data from my server so I used an httpURLrequest to get the data — eli, Mar 18 '16 at 11:49
An URLConnection for HTTP (RFC 2616) used to send and receive data over the web. Data may be of any type and length. This class may be used to send and receive streaming data whose length is not known in advance. — eli, Mar 18 '16 at 11:50
@eli its not about lenght or type but about well formated data. — , Mar 18 '16 at 12:11

score 0 · Answer 1 · answered Mar 18 '16 at 11:50

0

Did you set the output in your server side? For example:@Produces

@POST
@Produces(MediaType.APPLICATION_JSON)
public String getData() {
    ...
}

answered Mar 18 '16 at 11:50

Arthur C Stapassoli

49
8

score 0 · Answer 2 · edited May 23 '17 at 12:15

Your best bet based on the format in your response is to use a JSON object as in this post:

Get a JSON object from a HTTP response

Get your response as an HTTPResponse object, then create a new JSON object using

JSONObject myObject = new JSONObject(result);

Using JSON is easy. But its too much for me to re write here. Take a loog at the developer page for a good description: http://developer.android.com/reference/org/json/JSONObject.html

score 0 · Answer 3 · answered Mar 18 '16 at 11:54

Format your string to well formated JSONString first to get response like:

{data: {"event": "data", "target":1,"data":{"text":"Home","number":0,"id":02123421,"likes":[],"newPost":true,"created":1458300896392,"edited":1458300896392},"type":"create"}}

and just create a JSONObject from your JSONString like:

while ((line = rd.readLine()) != null)
   {
      sb.append(line);
      System.out.println(sb.toString());
   }
JSONObject data = null;
try {
   data = new JSONObject(sb.toString());
} catch (JSONException e) {
   //code in case variable line isnt well format json string
}

Why would you even want to send malformed data from server to client? It has to have a format in my opinion.

And then you could access anything with JSONObject Android APIs (As Nick mentioned above)

score 0 · Answer 4 · answered Mar 18 '16 at 11:55

0

To parse html, you can use the Jsoup library.

http://jsoup.org/

Use examples:

http://jsoup.org/cookbook/extracting-data/example-list-links

answered Mar 18 '16 at 11:55

Rafael Lucena

635
1
6
9

Have you used it before? – eli Mar 18 '16 at 12:42
Yes. If you want to take a look how I use it in my project: https://github.com/lucEvent/newsup – Rafael Lucena Mar 18 '16 at 12:59

score 0 · Answer 5 · answered Mar 20 '16 at 11:25

You can try like this

   try {
                    JSONObject jsonObject = new JSONObject(sb.toString());
                    String target=jsonObject.optString("target");
                        JSONObject data=jsonObject.optJSONObject("data");
                        String text=data.optString("text");
                        int number=data.optInt("number");
                        //---
                        JSONArray likes=data.optJSONArray("likes");
                        for (int i=0;i<likes.length();i++){
                            JSONObject likeObj = likes.getJSONObject(i);
                            // If you have likes object you can pares here like
                            int rating=likeObj.optInt("rating");
                        }
                        String newPost=data.optString("newPost");
                        String created=data.optString("created");
                        String edited=data.optString("edited");
                    String type=jsonObject.optString("type");
                } catch (JSONException e) {
                    e.printStackTrace();
                }

I created an HttpURLConnection but how do I parse the data?

5 Answers5