Merge #24

src/main/java/org/telegram/telegrambots/Constants.java

@@ -1,4 +1,4 @@
-package org.telegram.telegrambots.api;
+package org.telegram.telegrambots;
 
 /**
  * @author Ruben Bermudez
@@ -8,4 +8,6 @@ package org.telegram.telegrambots.api;
  */
 public class Constants {
     public static final String BASEURL = "https://api.telegram.org/bot";
+    public static final String RESPONSEFIELDOK = "ok";
+    public static final String RESPONSEFIELDRESULT = "result";
 }

src/main/java/org/telegram/telegrambots/TelegramBotsApi.java

@@ -12,7 +12,6 @@ import org.apache.http.impl.client.HttpClientBuilder;
 import org.apache.http.util.EntityUtils;
 import org.json.JSONException;
 import org.json.JSONObject;
-import org.telegram.telegrambots.api.Constants;
 import org.telegram.telegrambots.api.methods.updates.SetWebhook;
 import org.telegram.telegrambots.bots.TelegramLongPollingBot;
 import org.telegram.telegrambots.bots.TelegramWebhookBot;
@@ -21,6 +20,7 @@ import org.telegram.telegrambots.updatesreceivers.Webhook;
 
 import java.io.File;
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 
 /**
  * @author Ruben Bermudez
@@ -29,21 +29,16 @@ import java.io.IOException;
  * @date 14 of January of 2016
  */
 public class TelegramBotsApi {
-    private final boolean useWebhook; ///<
+    private boolean useWebhook; ///<
-    private final Webhook webhook; ///<
+    private Webhook webhook; ///<
-    private final String extrenalUrl; ///<
+    private String extrenalUrl; ///<
-    private final String pathToCertificate; ///<
+    private String pathToCertificate; ///<
-    private final String publicCertificateName; ///<
+    private String publicCertificateName; ///<
 
     /**
      *
      */
     public TelegramBotsApi() {
-        this.useWebhook = false;
-        webhook = null;
-        extrenalUrl = null;
-        this.pathToCertificate = null;
-        this.publicCertificateName = null;
     }
 
     /**
@@ -56,8 +51,6 @@ public class TelegramBotsApi {
     public TelegramBotsApi(String keyStore, String keyStorePassword, String externalUrl, String internalUrl) throws TelegramApiException {
         this.useWebhook = true;
         this.extrenalUrl = fixExternalUrl(externalUrl);
-        this.pathToCertificate = null;
-        this.publicCertificateName = null;
         webhook = new Webhook(keyStore, keyStorePassword, internalUrl);
         webhook.startServer();
     }
@@ -86,7 +79,7 @@ public class TelegramBotsApi {
      * @return
      */
     private static String fixExternalUrl(String externalUrl) {
-        if (!externalUrl.endsWith("/")) {
+        if (externalUrl != null && !externalUrl.endsWith("/")) {
             externalUrl = externalUrl + "/";
         }
         return externalUrl;
@@ -116,9 +109,9 @@ public class TelegramBotsApi {
             CloseableHttpResponse response = httpclient.execute(httppost);
             HttpEntity ht = response.getEntity();
             BufferedHttpEntity buf = new BufferedHttpEntity(ht);
-            String responseContent = EntityUtils.toString(buf, "UTF-8");
+            String responseContent = EntityUtils.toString(buf, StandardCharsets.UTF_8);
             JSONObject jsonObject = new JSONObject(responseContent);
-            if (!jsonObject.getBoolean("ok")) {
+            if (!jsonObject.getBoolean(Constants.RESPONSEFIELDOK)) {
                 throw new TelegramApiException(webHookURL == null ? "Error removing old webhook" : "Error setting webhook", responseContent);
             }
         } catch (JSONException e) {

src/main/java/org/telegram/telegrambots/api/methods/AnswerCallbackQuery.java

@@ -5,6 +5,7 @@ import com.fasterxml.jackson.databind.SerializerProvider;
 import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
 
 import org.json.JSONObject;
+import org.telegram.telegrambots.Constants;
 
 import java.io.IOException;
 
@@ -52,8 +53,8 @@ public class AnswerCallbackQuery extends BotApiMethod<Boolean> {
 
     @Override
     public Boolean deserializeResponse(JSONObject answer) {
-        if (answer.getBoolean("ok")) {
+        if (answer.getBoolean(Constants.RESPONSEFIELDOK)) {
-            return answer.getBoolean("result");
+            return answer.getBoolean(Constants.RESPONSEFIELDRESULT);
         }
         return null;
     }

src/main/java/org/telegram/telegrambots/api/methods/AnswerInlineQuery.java

@@ -6,6 +6,7 @@ import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
 
 import org.json.JSONArray;
 import org.json.JSONObject;
+import org.telegram.telegrambots.Constants;
 import org.telegram.telegrambots.api.objects.inlinequery.result.InlineQueryResult;
 
 import java.io.IOException;
@@ -129,8 +130,8 @@ public class AnswerInlineQuery extends BotApiMethod<Boolean> {
 
     @Override
     public Boolean deserializeResponse(JSONObject answer) {
-        if (answer.getBoolean("ok")) {
+        if (answer.getBoolean(Constants.RESPONSEFIELDOK)) {
-            return answer.getBoolean("result");
+            return answer.getBoolean(Constants.RESPONSEFIELDRESULT);
         }
         return null;
     }

src/main/java/org/telegram/telegrambots/api/methods/ForwardMessage.java

@@ -5,6 +5,7 @@ import com.fasterxml.jackson.databind.SerializerProvider;
 import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
 
 import org.json.JSONObject;
+import org.telegram.telegrambots.Constants;
 import org.telegram.telegrambots.api.objects.Message;
 
 import java.io.IOException;
@@ -19,12 +20,12 @@ public class ForwardMessage extends BotApiMethod<Message> {
     public static final String PATH = "forwardmessage";
 
     public static final String CHATID_FIELD = "chat_id";
-    private String chatId; ///< Unique identifier for the chat to send the message to (or username for channels)
     public static final String FROMCHATID_FIELD = "from_chat_id";
-    private Integer fromChatId; ///< Unique identifier for the chat where the original message was sent — User or GroupChat id
     public static final String MESSAGEID_FIELD = "message_id";
-    private Integer messageId; ///< Unique message identifier
     public static final String DISABLENOTIFICATION_FIELD = "disable_notification";
+    private String chatId; ///< Unique identifier for the chat to send the message to (or username for channels)
+    private Integer fromChatId; ///< Unique identifier for the chat where the original message was sent — User or GroupChat id
+    private Integer messageId; ///< Unique message identifier
     /**
      * Optional. Sends the message silently.
      * iOS users will not receive a notification,
@@ -111,8 +112,8 @@ public class ForwardMessage extends BotApiMethod<Message> {
 
     @Override
     public Message deserializeResponse(JSONObject answer) {
-        if (answer.getBoolean("ok")) {
+        if (answer.getBoolean(Constants.RESPONSEFIELDOK)) {
-            return new Message(answer.getJSONObject("result"));
+            return new Message(answer.getJSONObject(Constants.RESPONSEFIELDRESULT));
         }
         return null;
     }

src/main/java/org/telegram/telegrambots/api/methods/GetFile.java

@@ -5,6 +5,7 @@ import com.fasterxml.jackson.databind.SerializerProvider;
 import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
 
 import org.json.JSONObject;
+import org.telegram.telegrambots.Constants;
 import org.telegram.telegrambots.api.objects.File;
 
 import java.io.IOException;
@@ -67,8 +68,8 @@ public class GetFile extends BotApiMethod<File> {
 
     @Override
     public File deserializeResponse(JSONObject answer) {
-        if (answer.getBoolean("ok")) {
+        if (answer.getBoolean(Constants.RESPONSEFIELDOK)) {
-            return new File(answer.getJSONObject("result"));
+            return new File(answer.getJSONObject(Constants.RESPONSEFIELDRESULT));
         }
         return null;
     }

src/main/java/org/telegram/telegrambots/api/methods/GetMe.java

@@ -5,6 +5,7 @@ import com.fasterxml.jackson.databind.SerializerProvider;
 import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
 
 import org.json.JSONObject;
+import org.telegram.telegrambots.Constants;
 import org.telegram.telegrambots.api.objects.User;
 
 import java.io.IOException;
@@ -31,8 +32,8 @@ public class GetMe extends BotApiMethod<User> {
 
     @Override
     public User deserializeResponse(JSONObject answer) {
-        if (answer.getBoolean("ok")) {
+        if (answer.getBoolean(Constants.RESPONSEFIELDOK)) {
-            return new User(answer.getJSONObject("result"));
+            return new User(answer.getJSONObject(Constants.RESPONSEFIELDRESULT));
         }
         return null;
     }

src/main/java/org/telegram/telegrambots/api/methods/GetUserProfilePhotos.java

@@ -5,6 +5,7 @@ import com.fasterxml.jackson.databind.SerializerProvider;
 import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
 
 import org.json.JSONObject;
+import org.telegram.telegrambots.Constants;
 import org.telegram.telegrambots.api.objects.UserProfilePhotos;
 
 import java.io.IOException;
@@ -77,8 +78,8 @@ public class GetUserProfilePhotos extends BotApiMethod<UserProfilePhotos> {
 
     @Override
     public UserProfilePhotos deserializeResponse(JSONObject answer) {
-        if (answer.getBoolean("ok")) {
+        if (answer.getBoolean(Constants.RESPONSEFIELDOK)) {
-            return new UserProfilePhotos(answer.getJSONObject("result"));
+            return new UserProfilePhotos(answer.getJSONObject(Constants.RESPONSEFIELDRESULT));
         }
         return null;
     }

src/main/java/org/telegram/telegrambots/api/methods/groupadministration/KickChatMember.java

@@ -5,6 +5,7 @@ import com.fasterxml.jackson.databind.SerializerProvider;
 import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
 
 import org.json.JSONObject;
+import org.telegram.telegrambots.Constants;
 import org.telegram.telegrambots.api.methods.BotApiMethod;
 
 import java.io.IOException;
@@ -64,8 +65,8 @@ public class KickChatMember extends BotApiMethod<Boolean> {
 
     @Override
     public Boolean deserializeResponse(JSONObject answer) {
-        if (answer.getBoolean("ok")) {
+        if (answer.getBoolean(Constants.RESPONSEFIELDOK)) {
-            return answer.getBoolean("result");
+            return answer.getBoolean(Constants.RESPONSEFIELDRESULT);
         }
         return null;
     }

src/main/java/org/telegram/telegrambots/api/methods/groupadministration/UnbanChatMember.java

@@ -5,6 +5,7 @@ import com.fasterxml.jackson.databind.SerializerProvider;
 import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
 
 import org.json.JSONObject;
+import org.telegram.telegrambots.Constants;
 import org.telegram.telegrambots.api.methods.BotApiMethod;
 
 import java.io.IOException;
@@ -60,8 +61,8 @@ public class UnbanChatMember extends BotApiMethod<Boolean> {
 
     @Override
     public Boolean deserializeResponse(JSONObject answer) {
-        if (answer.getBoolean("ok")) {
+        if (answer.getBoolean(Constants.RESPONSEFIELDOK)) {
-            return answer.getBoolean("result");
+            return answer.getBoolean(Constants.RESPONSEFIELDRESULT);
         }
         return null;
     }

src/main/java/org/telegram/telegrambots/api/methods/send/SendChatAction.java

@@ -5,6 +5,7 @@ import com.fasterxml.jackson.databind.SerializerProvider;
 import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
 
 import org.json.JSONObject;
+import org.telegram.telegrambots.Constants;
 import org.telegram.telegrambots.api.methods.BotApiMethod;
 
 import java.io.IOException;
@@ -55,8 +56,8 @@ public class SendChatAction extends BotApiMethod<Boolean> {
 
     @Override
     public Boolean deserializeResponse(JSONObject answer) {
-        if (answer.getBoolean("ok")) {
+        if (answer.getBoolean(Constants.RESPONSEFIELDOK)) {
-            return answer.getBoolean("result");
+            return answer.getBoolean(Constants.RESPONSEFIELDRESULT);
         }
         return null;
     }

src/main/java/org/telegram/telegrambots/api/methods/send/SendContact.java

@@ -5,6 +5,7 @@ import com.fasterxml.jackson.databind.SerializerProvider;
 import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
 
 import org.json.JSONObject;
+import org.telegram.telegrambots.Constants;
 import org.telegram.telegrambots.api.methods.BotApiMethod;
 import org.telegram.telegrambots.api.objects.Message;
 import org.telegram.telegrambots.api.objects.replykeyboard.ReplyKeyboard;
@@ -107,8 +108,8 @@ public class SendContact extends BotApiMethod<Message> {
 
     @Override
     public Message deserializeResponse(JSONObject answer) {
-        if (answer.getBoolean("ok")) {
+        if (answer.getBoolean(Constants.RESPONSEFIELDOK)) {
-            return new Message(answer.getJSONObject("result"));
+            return new Message(answer.getJSONObject(Constants.RESPONSEFIELDRESULT));
         }
         return null;
     }

src/main/java/org/telegram/telegrambots/api/methods/send/SendLocation.java

@@ -5,6 +5,7 @@ import com.fasterxml.jackson.databind.SerializerProvider;
 import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
 
 import org.json.JSONObject;
+import org.telegram.telegrambots.Constants;
 import org.telegram.telegrambots.api.methods.BotApiMethod;
 import org.telegram.telegrambots.api.objects.Message;
 import org.telegram.telegrambots.api.objects.replykeyboard.ReplyKeyboard;
@@ -96,8 +97,8 @@ public class SendLocation extends BotApiMethod<Message> {
 
     @Override
     public Message deserializeResponse(JSONObject answer) {
-        if (answer.getBoolean("ok")) {
+        if (answer.getBoolean(Constants.RESPONSEFIELDOK)) {
-            return new Message(answer.getJSONObject("result"));
+            return new Message(answer.getJSONObject(Constants.RESPONSEFIELDRESULT));
         }
         return null;
     }

src/main/java/org/telegram/telegrambots/api/methods/send/SendMessage.java

@@ -5,6 +5,7 @@ import com.fasterxml.jackson.databind.SerializerProvider;
 import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
 
 import org.json.JSONObject;
+import org.telegram.telegrambots.Constants;
 import org.telegram.telegrambots.api.methods.BotApiMethod;
 import org.telegram.telegrambots.api.methods.ParseMode;
 import org.telegram.telegrambots.api.objects.Message;
@@ -147,8 +148,8 @@ public class SendMessage extends BotApiMethod<Message> {
 
     @Override
     public Message deserializeResponse(JSONObject answer) {
-        if (answer.getBoolean("ok")) {
+        if (answer.getBoolean(Constants.RESPONSEFIELDOK)) {
-            return new Message(answer.getJSONObject("result"));
+            return new Message(answer.getJSONObject(Constants.RESPONSEFIELDRESULT));
         }
         return null;
     }

src/main/java/org/telegram/telegrambots/api/methods/send/SendVenue.java

@@ -5,6 +5,7 @@ import com.fasterxml.jackson.databind.SerializerProvider;
 import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
 
 import org.json.JSONObject;
+import org.telegram.telegrambots.Constants;
 import org.telegram.telegrambots.api.methods.BotApiMethod;
 import org.telegram.telegrambots.api.objects.Message;
 import org.telegram.telegrambots.api.objects.replykeyboard.ReplyKeyboard;
@@ -127,8 +128,8 @@ public class SendVenue extends BotApiMethod<Message> {
 
     @Override
     public Message deserializeResponse(JSONObject answer) {
-        if (answer.getBoolean("ok")) {
+        if (answer.getBoolean(Constants.RESPONSEFIELDOK)) {
-            return new Message(answer.getJSONObject("result"));
+            return new Message(answer.getJSONObject(Constants.RESPONSEFIELDRESULT));
         }
         return null;
     }

src/main/java/org/telegram/telegrambots/api/methods/updatingmessages/EditMessageCaption.java

@@ -5,6 +5,7 @@ import com.fasterxml.jackson.databind.SerializerProvider;
 import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
 
 import org.json.JSONObject;
+import org.telegram.telegrambots.Constants;
 import org.telegram.telegrambots.api.methods.BotApiMethod;
 import org.telegram.telegrambots.api.objects.Message;
 import org.telegram.telegrambots.api.objects.replykeyboard.InlineKeyboardMarkup;
@@ -112,8 +113,8 @@ public class EditMessageCaption extends BotApiMethod<Message> {
 
     @Override
     public Message deserializeResponse(JSONObject answer) {
-        if (answer.getBoolean("ok")) {
+        if (answer.getBoolean(Constants.RESPONSEFIELDOK)) {
-            return new Message(answer.getJSONObject("result"));
+            return new Message(answer.getJSONObject(Constants.RESPONSEFIELDRESULT));
         }
         return null;
     }

src/main/java/org/telegram/telegrambots/api/methods/updatingmessages/EditMessageReplyMarkup.java

@@ -5,6 +5,7 @@ import com.fasterxml.jackson.databind.SerializerProvider;
 import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
 
 import org.json.JSONObject;
+import org.telegram.telegrambots.Constants;
 import org.telegram.telegrambots.api.methods.BotApiMethod;
 import org.telegram.telegrambots.api.objects.Message;
 import org.telegram.telegrambots.api.objects.replykeyboard.InlineKeyboardMarkup;
@@ -99,8 +100,8 @@ public class EditMessageReplyMarkup extends BotApiMethod<Message> {
 
     @Override
     public Message deserializeResponse(JSONObject answer) {
-        if (answer.getBoolean("ok")) {
+        if (answer.getBoolean(Constants.RESPONSEFIELDOK)) {
-            return new Message(answer.getJSONObject("result"));
+            return new Message(answer.getJSONObject(Constants.RESPONSEFIELDRESULT));
         }
         return null;
     }

src/main/java/org/telegram/telegrambots/api/methods/updatingmessages/EditMessageText.java

@@ -5,6 +5,7 @@ import com.fasterxml.jackson.databind.SerializerProvider;
 import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
 
 import org.json.JSONObject;
+import org.telegram.telegrambots.Constants;
 import org.telegram.telegrambots.api.methods.BotApiMethod;
 import org.telegram.telegrambots.api.methods.ParseMode;
 import org.telegram.telegrambots.api.objects.Message;
@@ -152,8 +153,8 @@ public class EditMessageText extends BotApiMethod<Message> {
 
     @Override
     public Message deserializeResponse(JSONObject answer) {
-        if (answer.getBoolean("ok")) {
+        if (answer.getBoolean(Constants.RESPONSEFIELDOK)) {
-            return new Message(answer.getJSONObject("result"));
+            return new Message(answer.getJSONObject(Constants.RESPONSEFIELDRESULT));
         }
         return null;
     }

src/main/java/org/telegram/telegrambots/bots/AbsSender.java

@@ -16,8 +16,8 @@ import org.apache.http.impl.client.HttpClients;
 import org.apache.http.message.BasicNameValuePair;
 import org.apache.http.util.EntityUtils;
 import org.json.JSONObject;
+import org.telegram.telegrambots.Constants;
 import org.telegram.telegrambots.TelegramApiException;
-import org.telegram.telegrambots.api.Constants;
 import org.telegram.telegrambots.api.methods.AnswerCallbackQuery;
 import org.telegram.telegrambots.api.methods.AnswerInlineQuery;
 import org.telegram.telegrambots.api.methods.BotApiMethod;
@@ -49,6 +49,7 @@ import org.telegram.telegrambots.updateshandlers.SentCallback;
 
 import java.io.IOException;
 import java.io.Serializable;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.ExecutorService;
@@ -418,19 +419,19 @@ public abstract class AbsSender {
                 if (sendDocument.getReplayToMessageId() != null) {
                     nameValuePairs.add(new BasicNameValuePair(SendDocument.DISABLENOTIFICATION_FIELD, sendDocument.getDisableNotification().toString()));
                 }
-                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs, "UTF-8"));
+                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs, StandardCharsets.UTF_8));
             }
 
             CloseableHttpResponse response = httpClient.execute(httppost);
             HttpEntity ht = response.getEntity();
             BufferedHttpEntity buf = new BufferedHttpEntity(ht);
-            responseContent = EntityUtils.toString(buf, "UTF-8");
+            responseContent = EntityUtils.toString(buf, StandardCharsets.UTF_8);
         } catch (IOException e) {
             throw new TelegramApiException("Unable to send document", e);
         }
 
         JSONObject jsonObject = new JSONObject(responseContent);
-        if (!jsonObject.getBoolean("ok")) {
+        if (!jsonObject.getBoolean(Constants.RESPONSEFIELDOK)) {
             throw new TelegramApiException("Error at sendDocument", jsonObject.getString("description"));
         }
 
@@ -477,19 +478,19 @@ public abstract class AbsSender {
                 if (sendPhoto.getDisableNotification() != null) {
                     nameValuePairs.add(new BasicNameValuePair(SendPhoto.DISABLENOTIFICATION_FIELD, sendPhoto.getDisableNotification().toString()));
                 }
-                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs, "UTF-8"));
+                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs, StandardCharsets.UTF_8));
             }
 
             CloseableHttpResponse response = httpClient.execute(httppost);
             HttpEntity ht = response.getEntity();
             BufferedHttpEntity buf = new BufferedHttpEntity(ht);
-            responseContent = EntityUtils.toString(buf, "UTF-8");
+            responseContent = EntityUtils.toString(buf, StandardCharsets.UTF_8);
         } catch (IOException e) {
             throw new TelegramApiException("Unable to send photo", e);
         }
 
         JSONObject jsonObject = new JSONObject(responseContent);
-        if (!jsonObject.getBoolean("ok")) {
+        if (!jsonObject.getBoolean(Constants.RESPONSEFIELDOK)) {
             throw new TelegramApiException("Error at sendPhoto", jsonObject.getString("description"));
         }
 
@@ -554,19 +555,19 @@ public abstract class AbsSender {
                 if (sendVideo.getDisableNotification() != null) {
                     nameValuePairs.add(new BasicNameValuePair(SendVideo.DISABLENOTIFICATION_FIELD, sendVideo.getDisableNotification().toString()));
                 }
-                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs, "UTF-8"));
+                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs, StandardCharsets.UTF_8));
             }
 
             CloseableHttpResponse response = httpClient.execute(httppost);
             HttpEntity ht = response.getEntity();
             BufferedHttpEntity buf = new BufferedHttpEntity(ht);
-            responseContent = EntityUtils.toString(buf, "UTF-8");
+            responseContent = EntityUtils.toString(buf, StandardCharsets.UTF_8);
         } catch (IOException e) {
             throw new TelegramApiException("Unable to send video", e);
         }
 
         JSONObject jsonObject = new JSONObject(responseContent);
-        if (!jsonObject.getBoolean("ok")) {
+        if (!jsonObject.getBoolean(Constants.RESPONSEFIELDOK)) {
             throw new TelegramApiException("Error at sendVideo", jsonObject.getString("description"));
         }
 
@@ -608,19 +609,19 @@ public abstract class AbsSender {
                 if (sendSticker.getDisableNotification() != null) {
                     nameValuePairs.add(new BasicNameValuePair(SendSticker.DISABLENOTIFICATION_FIELD, sendSticker.getDisableNotification().toString()));
                 }
-                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs, "UTF-8"));
+                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs, StandardCharsets.UTF_8));
             }
 
             CloseableHttpResponse response = httpClient.execute(httppost);
             HttpEntity ht = response.getEntity();
             BufferedHttpEntity buf = new BufferedHttpEntity(ht);
-            responseContent = EntityUtils.toString(buf, "UTF-8");
+            responseContent = EntityUtils.toString(buf, StandardCharsets.UTF_8);
         } catch (IOException e) {
             throw new TelegramApiException("Unable to send sticker", e);
         }
 
         JSONObject jsonObject = new JSONObject(responseContent);
-        if (!jsonObject.getBoolean("ok")) {
+        if (!jsonObject.getBoolean(Constants.RESPONSEFIELDOK)) {
             throw new TelegramApiException("Error at sendSticker", jsonObject.getString("description"));
         }
 
@@ -685,13 +686,13 @@ public abstract class AbsSender {
                 if (sendAudio.getDisableNotification() != null) {
                     nameValuePairs.add(new BasicNameValuePair(SendAudio.DISABLENOTIFICATION_FIELD, sendAudio.getDisableNotification().toString()));
                 }
-                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs, "UTF-8"));
+                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs, StandardCharsets.UTF_8));
             }
 
             CloseableHttpResponse response = httpClient.execute(httppost);
             HttpEntity ht = response.getEntity();
             BufferedHttpEntity buf = new BufferedHttpEntity(ht);
-            responseContent = EntityUtils.toString(buf, "UTF-8");
+            responseContent = EntityUtils.toString(buf, StandardCharsets.UTF_8);
         } catch (IOException e) {
             throw new TelegramApiException("Unable to send sticker", e);
         }
@@ -702,12 +703,12 @@ public abstract class AbsSender {
          * 
          * {"description":"[Error]: Bad Request: chat not found","error_code":400,"ok":false}
          */
-        if(!jsonObject.getBoolean("ok")){
+        if (!jsonObject.getBoolean(Constants.RESPONSEFIELDOK)) {
-        	throw new TelegramApiException("Error at sendAudio", jsonObject.getString("description"));
+            throw new TelegramApiException("Error at sendAudio", jsonObject.getString("description"));
         }
         
          // and if not, we can expect a "result" section. and out of this can a new Message object be built
-        return new Message(jsonObject.getJSONObject("result"));           
+        return new Message(jsonObject.getJSONObject(Constants.RESPONSEFIELDRESULT));
     }
 
     /**
@@ -758,19 +759,19 @@ public abstract class AbsSender {
                 if (sendVoice.getDuration() != null) {
                     nameValuePairs.add(new BasicNameValuePair(SendVoice.DURATION_FIELD, sendVoice.getDuration().toString()));
                 }
-                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs, "UTF-8"));
+                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs, StandardCharsets.UTF_8));
             }
 
             CloseableHttpResponse response = httpClient.execute(httppost);
             HttpEntity ht = response.getEntity();
             BufferedHttpEntity buf = new BufferedHttpEntity(ht);
-            responseContent = EntityUtils.toString(buf, "UTF-8");
+            responseContent = EntityUtils.toString(buf, StandardCharsets.UTF_8);
         } catch (IOException e) {
             throw new TelegramApiException("Unable to send sticker", e);
         }
 
         JSONObject jsonObject = new JSONObject(responseContent);
-        if (!jsonObject.getBoolean("ok")) {
+        if (!jsonObject.getBoolean(Constants.RESPONSEFIELDOK)) {
             throw new TelegramApiException("Error at sendVoice", jsonObject.getString("description"));
         }
 
@@ -785,15 +786,15 @@ public abstract class AbsSender {
                 CloseableHttpClient httpclient = HttpClientBuilder.create().setSSLHostnameVerifier(new NoopHostnameVerifier()).build();
                 String url = getBaseUrl() + method.getPath();
                 HttpPost httppost = new HttpPost(url);
-                httppost.addHeader("charset", "UTF-8");
+                httppost.addHeader("charset", StandardCharsets.UTF_8.name());
                 httppost.setEntity(new StringEntity(method.toJson().toString(), ContentType.APPLICATION_JSON));
                 CloseableHttpResponse response = httpclient.execute(httppost);
                 HttpEntity ht = response.getEntity();
                 BufferedHttpEntity buf = new BufferedHttpEntity(ht);
-                String responseContent = EntityUtils.toString(buf, "UTF-8");
+                String responseContent = EntityUtils.toString(buf, StandardCharsets.UTF_8);
 
                 JSONObject jsonObject = new JSONObject(responseContent);
-                if (!jsonObject.getBoolean("ok")) {
+                if (!jsonObject.getBoolean(Constants.RESPONSEFIELDOK)) {
                     callback.onError(method, jsonObject);
                 }
                 callback.onResult(method, jsonObject);
@@ -809,18 +810,18 @@ public abstract class AbsSender {
             CloseableHttpClient httpclient = HttpClientBuilder.create().setSSLHostnameVerifier(new NoopHostnameVerifier()).build();
             String url = getBaseUrl() + method.getPath();
             HttpPost httppost = new HttpPost(url);
-            httppost.addHeader("charset", "UTF-8");
+            httppost.addHeader("charset", StandardCharsets.UTF_8.name());
             httppost.setEntity(new StringEntity(method.toJson().toString(), ContentType.APPLICATION_JSON));
             CloseableHttpResponse response = httpclient.execute(httppost);
             HttpEntity ht = response.getEntity();
             BufferedHttpEntity buf = new BufferedHttpEntity(ht);
-            responseContent = EntityUtils.toString(buf, "UTF-8");
+            responseContent = EntityUtils.toString(buf, StandardCharsets.UTF_8);
         } catch (IOException e) {
             throw new TelegramApiException("Unable to execute " + method.getPath() + " method", e);
         }
 
         JSONObject jsonObject = new JSONObject(responseContent);
-        if (!jsonObject.getBoolean("ok")) {
+        if (!jsonObject.getBoolean(Constants.RESPONSEFIELDOK)) {
             throw new TelegramApiException("Error at " + method.getPath(), jsonObject.getString("description"));
         }
 

src/main/java/org/telegram/telegrambots/updatesreceivers/UpdatesThread.java

@@ -14,13 +14,14 @@ import org.apache.http.util.EntityUtils;
 import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
-import org.telegram.telegrambots.api.Constants;
+import org.telegram.telegrambots.Constants;
 import org.telegram.telegrambots.api.methods.updates.GetUpdates;
 import org.telegram.telegrambots.api.objects.Update;
 import org.telegram.telegrambots.bots.ITelegramLongPollingBot;
 
 import java.io.IOException;
 import java.io.InvalidObjectException;
+import java.nio.charset.StandardCharsets;
 import java.util.concurrent.ConcurrentLinkedDeque;
 import java.util.concurrent.TimeUnit;
 
@@ -37,8 +38,8 @@ public class UpdatesThread {
     private final ReaderThread readerThread;
     private final HandlerThread handlerThread;
     private final ConcurrentLinkedDeque<Update> receivedUpdates = new ConcurrentLinkedDeque<>();
+    private final String token;
     private int lastReceivedUpdate = 0;
-    private String token;
 
     public UpdatesThread(String token, ITelegramLongPollingBot callback) {
         this.token = token;
@@ -69,7 +70,7 @@ public class UpdatesThread {
                 //http client
                 HttpPost httpPost = new HttpPost(url);
                 try {
-                    httpPost.addHeader("charset", "UTF-8");
+                    httpPost.addHeader("charset", StandardCharsets.UTF_8.name());
                     httpPost.setConfig(requestConfig);
                     httpPost.setEntity(new StringEntity(request.toJson().toString(), ContentType.APPLICATION_JSON));
                     HttpResponse response;
@@ -77,14 +78,14 @@ public class UpdatesThread {
                     HttpEntity ht = response.getEntity();
 
                     BufferedHttpEntity buf = new BufferedHttpEntity(ht);
-                    String responseContent = EntityUtils.toString(buf, "UTF-8");
+                    String responseContent = EntityUtils.toString(buf, StandardCharsets.UTF_8);
 
                     try {
                         JSONObject jsonObject = new JSONObject(responseContent);
-                        if (!jsonObject.getBoolean("ok")) {
+                        if (!jsonObject.getBoolean(Constants.RESPONSEFIELDOK)) {
                             throw new InvalidObjectException(jsonObject.toString());
                         }
-                        JSONArray jsonArray = jsonObject.getJSONArray("result");
+                        JSONArray jsonArray = jsonObject.getJSONArray(Constants.RESPONSEFIELDRESULT);
                         if (jsonArray.length() != 0) {
                             for (int i = 0; i < jsonArray.length(); i++) {
                                 Update update = new Update(jsonArray.getJSONObject(i));