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https://demo1738991.mockable.io/libraryRooms

@Override
        protected JSONObject doInBackground(Context... contexts) {
            // this will be required to access string resource weather_url
            Context context = contexts[0];

            // this is url address from which we need data
            String urlString = context.getResources().getString(R.string.weather_url);
            
            // this is URL object which can open connection for us 
            URL url = null;
            
            // this is the connection object opened by URL object
            HttpsURLConnection httpsURLConnection = null;
            
            // we want our json data from api to store it as JSON Object 
            JSONObject jsonObject = null;
           
            // from established connection, this can bring us the data
            InputStream inputStream = null;
            
            try{
                // let's make URL object using url address    
                url = new URL(urlString);
                
                // once we have URL object, we can open the connection.
                // make sure to have Network access permissions
                httpsURLConnection = (HttpsURLConnection) url.openConnection();
                
                // REST request method (GET, POST, PUT....)
                httpsURLConnection.setRequestMethod("GET");
                
                // Now our httpURLConnection is ready so let's connect it to get data
                httpsURLConnection.connect();
                
                // input stream to read data from connection
                inputStream = httpsURLConnection.getInputStream();
                
                // buffer reader to temp store incoming data 
                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
                
                //make full response by appending individual lines 
                String temp, response = "";
                while ((temp = bufferedReader.readLine()) != null) {
                    response += temp;
                }
                
                //from this response, make a JsonObject
                jsonObject = (JSONObject) new JSONTokener(response).nextValue();
                
            } catch (Exception e) {
                e.printStackTrace();
            }finally {
                if (inputStream != null) {
                    try {
                        // this will close inputStream and bufferReader as well
                        inputStream.close();
                    } catch (IOException ignored) {
                        ignored.printStackTrace();
                    }
                }
                if (httpsURLConnection != null) {
                    // disconnect the connection
                    httpsURLConnection.disconnect();
                }
            }
            return jsonObject;
        }

https://demo1738991.mockable.io/onlineweather