Send Message by TG Bot

时常有些事儿离不开个在线及时通知，使用国内微信无疑是最方便的，奈何人家不提供这样服务呀，强迫你用企业微信，又或者选择其他的，如钉钉、飞书之类的，太重了不说，还很容易被打扰。最后不得不转向国外的服务，专业专注，非常符合我的口味。

Telegram Bot 解决方案

创建机器人

1. 添加联系人 @BotFather, 输入命令 /newbot，接着与他聊天交互就可以创建好一个机器人。

2. 创建完成后，它会发给你与机器人聊天的地址，如 t.me/<Your name of bot>, 点击即可开启与新建机器人的聊天会话。

3. 使用以下 curl 命令，从返回内容中获取 chat_id:

   curl https://api.telegram.org/bot<bot token>/getUpdates
   

   响应结果如下：

{
  "ok": true,
  "result": [
    {
      "update_id": 693610363,
      "message": {
        "message_id": 1,
        "from": {
          "id": 6499434637,
          "is_bot": false,
          "first_name": "jcold",
          "last_name": "yu",
          "username": "Jcoldyu",
          "language_code": "zh-hans"
        },
        "chat": {
          "id": 6499434637,
          "first_name": "jcold",
          "last_name": "yu",
          "username": "Jcoldyu",
          "type": "private"
        },
        "date": 1711008156,
        "text": "/start",
        "entities": [{ "offset": 0, "length": 6, "type": "bot_command" }]
      }
    },
    {
      "update_id": 693610364,
      "message": {
        "message_id": 2,
        "from": {
          "id": 6499434637,
          "is_bot": false,
          "first_name": "jcold",
          "last_name": "yu",
          "username": "Jcoldyu",
          "language_code": "zh-hans"
        },
        "chat": {
          "id": 6499434637,
          "first_name": "jcold",
          "last_name": "yu",
          "username": "Jcoldyu",
          "type": "private"
        },
        "date": 1711008160,
        "text": "hello"
      }
    },
    {
      "update_id": 693610365,
      "message": {
        "message_id": 3,
        "from": {
          "id": 6499434637,
          "is_bot": false,
          "first_name": "jcold",
          "last_name": "yu",
          "username": "Jcoldyu",
          "language_code": "zh-hans"
        },
        "chat": {
          "id": 6499434637,
          "first_name": "jcold",
          "last_name": "yu",
          "username": "Jcoldyu",
          "type": "private"
        },
        "date": 1711008311,
        "text": "/start",
        "entities": [{ "offset": 0, "length": 6, "type": "bot_command" }]
      }
    }
  ]
}

4. 通过下面的 Web 接口就可以以机器人的身份给自己发消息啦，完美！

   curl -X POST \
       -H 'Content-Type: application/json' \
       -d '{"chat_id": "<chat_id>", "text": "This is a test message from your bot!, 中文"}' \
       https://api.telegram.org/bot<bot token>/sendMessage
   

设置机器人

Edit Bots
/setname - change a bot's name
/setdescription - change bot description
/setabouttext - change bot about info
/setuserpic - change bot profile photo
/setcommands - change the list of commands
/deletebot - delete a bot

可以通过 /setcommads 给机器人增加一些命令，方便快捷交互。

接管机器人后台

习惯使用 Rust ，添加依赖 <https://lib.rs/crates/telegram-bot>, 下面是 Demo 代码，具体根据版本会有变动，以官方文档为准。

use std::env;
use futures::StreamExt;
use telegram_bot::*;

#[tokio::main]
async fn main() -> Result<(), Error> {
    let token = env::var("TELEGRAM_BOT_TOKEN").expect("TELEGRAM_BOT_TOKEN not set");
    let api = Api::new(token);

    // Fetch new updates via long poll method
    let mut stream = api.stream();
    while let Some(update) = stream.next().await {
        // If the received update contains a new message...
        let update = update?;
        if let UpdateKind::Message(message) = update.kind {
            if let MessageKind::Text { ref data, .. } = message.kind {
                // Print received text message to stdout.
                println!("<{}>: {}", &message.from.first_name, data);

                // Answer message with "Hi".
                api.send(message.text_reply(format!(
                    "Hi, {}! You just wrote '{}'",
                    &message.from.first_name, data
                )))
                .await?;
            }
        }
    }
    Ok(())
}