tgbots-module

Enhanced Java telegram bots runner built on top of the Telegram Bots library.

Why?

• I want separate projects per bots.
• I want to easily switch between long polling and webhook methods without recompiling the application.
• I want to easily disable bots without recompiling the application.
• I want yaml configs to store bot tokens and other data.
• I want different profiles for configs.
• I want command system with roles support.
• I want localization support.

Example

@tgbotsmodulebot (source code)

Usage

• Add gradle dependency:

  implementation 'com.annimon:tgbots-module:7.1.0'

• Implement BotModule interface:

  public class TestBot implements BotModule {   
     @Override
     public BotHandler botHandler(Config config) {
         super(config.getToken());
         return new TestBotHandler();
     }
  }

• [Optional] Add main method to run single project:

  public class TestBot implements BotModule {   
     public static void main(String[] args) {
         final var profile = (args.length >= 1) ? args[0] : "";
         Runner.run(profile, List.of(new TestBot()));
     }
     // ...
  }

• [Optional] Add yaml configuration support:

  import lombok.Data;
  import com.fasterxml.jackson.annotation.JsonProperty;
  import javax.validation.constraints.NotBlank;
  
  @Data
  public class BotConfig {
  
      @NotBlank
      @JsonProperty(required = true)
      private String token;
  
      @NotBlank
      @JsonProperty(required = true)
      private String username;
  }

  testbot.yaml

  token: 123456789:ABCDEFGHIJKLM_NOPQRSTUVWXYZ01234567
  username: bot

  public class TestBot implements BotModule {   
     // ...
     @Override
     public BotHandler botHandler(Config config) {
         final var configLoader = new YamlConfigLoaderService();
         final var configFile = configLoader.configFile("testbot", config.getProfile());
         final var botConfig = configLoader.loadFile(configFile, BotConfig.class);
         return new TestBotHandler(botConfig);
     }
  }

• Fill in config.yaml (See Webhooks examples):

  log-level: FINE
  webhook:
    enabled: false
    port: env(PORT:8443)
    externalUrl: https://123.45.67.890:$port
    internalUrl: http://0.0.0.0:$port
    keystorePath: cert/keystore.jks
    keystorePassword: env(KEYSTORE_PASSWORD)
  modules:
    - com.annimon.testbot.TestBot

• Happy bots developing:

  public class TestBotHandler extends BotHandler {
  
      private final BotConfig botConfig;
  
      public TestBotHandler(BotConfig botConfig) {
          super(botConfig.getToken());
          this.botConfig = botConfig;
      }
  
      @Override
      public BotApiMethod onUpdate(Update update) {
          // your code here
          return null;
      }
  
      @Override
      public String getBotUsername() {
          return botConfig.getUsername();
      }
  }

Now you can easily switch between webhook and long polling methods by changing the webhook: enabled flag in config,yaml.

Or you can create config-test.yaml and run the test profile:

java -cp tgbots-module.jar:testbot.jar:yourfavoritebot.jar com.annimon.telegrambots.Runner test

Webhooks

Heroku

Heroku starts on a random port, you can get a value from the environment property PORT:

webhook:
  enabled: true
  port: env(PORT)
  externalUrl: https://yourappname.herokuapp.com
  internalUrl: http://0.0.0.0:$port

Self-hosted

Use certgen.sh to generate a certificate (replace SERVERIPADDRESS with the server's IP address):

JKS=keystore.jks
CERT=public_cert.pem

openssl req -newkey rsa:2048 -sha256 -nodes \
    -keyout private.key -x509 \
    -days 365 \
    -out $CERT \
    -subj "/C=US/ST=Utah/L=Location/O=Organization/CN=SERVERIPADDRESS"

openssl pkcs12 -export \
    -in $CERT \
    -inkey private.key \
    -certfile $CERT \
    -out keystore.p12

keytool -importkeystore \
    -srckeystore keystore.p12 \
    -srcstoretype pkcs12 \
    -sigalg SHA1withRSA \
    -destkeystore $JKS \
    -deststoretype pkcs12

rm keystore.p12 private.key

The keystore password will be asked several times during the generation of the certificate. Don't forget to export it:

export KEYSTORE_PASSWORD=mysupersecretpasswordis123456

Specify generated keystore.jks and public_cert.pem paths and your SERVERIPADDRESS in config.yaml:

webhook:
  enabled: true
  port: 8443
  externalUrl: https://SERVERIPADDRESS:$port
  internalUrl: http://0.0.0.0:$port
  keystorePath: cert/keystore.jks
  keystorePassword: env(KEYSTORE_PASSWORD)
  certificatePublicKeyPath: cert/public_cert.pem