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Description

Bindings for Telegram Bot API on Go. API v4.4 (29 July 2019) is supported. All methods and types represent their alter ego from Telegram Bot API so you would expect what you see in the official documentation. And you don't need to study the new API to use this library.

Programming language: Go
License: MIT License
Latest version: v0.3.0

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README

Telegraphist

GoDoc Telegraphist CI status Go Report Card GitHub tag (latest SemVer) GitHub

Telegram Bot API on Go. API v4.4 (29 July 2019) is supported. All methods and types represent their alter ego from Telegram Bot API so you would expect what you see in the official documentation. And you don't need to study the new API to use this library.

Documentation

Installation

go get -u github.com/xamut/telegraphist

Usage

package main

import (
    "encoding/json"
    "fmt"
    "os"

    Telegraphist "github.com/xamut/telegraphist"
    Telegram "github.com/xamut/telegraphist/telegram"
)

func printResp(resp interface{}, err error) {
    if err != nil {
        fmt.Println(err)
    }
    respAsJSON, _ := json.MarshalIndent(resp, "", "\t")
    fmt.Println(string(respAsJSON))
}

func main() {
    telegraphist, err := Telegraphist.NewClient(&Telegraphist.ClientConfig{
        BotToken: "YOUR_BOT_TOKEN",
    })

    if err != nil {
        fmt.Println(err)
    }

    printResp(telegraphist.GetMe()) // Simple method to obtain basic bot info
                    // https://core.telegram.org/bots/api#getme
                    // Returns an User struct

    chatID := int64(<YOUR_CHAT_ID>)
    printResp(telegraphist.SendMessage(&Telegram.SendMessageParams{ // Send a text message to a chat
        ChatID: chatID,                         // https://core.telegram.org/bots/api#sendmessage
        Text:   "Hello there!",                 // Returns a Message struct
    }))

    photo, _ := os.Open("<PATH_TO_PHOTO>")
    printResp(telegraphist.SendPhoto(&Telegram.SendPhotoParams{ // Send a photo to a chat
        ChatID:  chatID,                            // https://core.telegram.org/bots/api#sendphoto
        Photo:   photo,                     // Returns a Message struct
        Caption: "Just a nice photo",
    }))
}

Getting updates

Webhook

  • Find your IP
curl ifconfig.co

  • Use nip.io to pretend you have a domain, for example, "app.X.X.X.X.nip.io"

  • Generate a certificate, replace X.X.X.X with your IP:

openssl req -newkey rsa:2048 \
  -new -nodes -x509 \
  -days 3650 \
  -out cert.pem \
  -keyout key.pem \
  -subj "/O=Organization/CN=app.X.X.X.X.nip.io"
  • Run server
package main

import (
    "encoding/json"
    "fmt"
    "log"
    "net/url"
    "os"
    "path"

    Telegraphist "github.com/xamut/telegraphist"
    Telegram "github.com/xamut/telegraphist/telegram"
)

func combineURL(host string, parts ...string) string {
    baseURL, err := url.Parse(host)
    if err != nil {
        log.Fatal(err)
    }
    parts = append([]string{baseURL.Path}, parts...)
    baseURL.Path = path.Join(parts...)

    return baseURL.String()
}

func main() {
    telegraphist, err := Telegraphist.NewClient(&Telegraphist.ClientConfig{
        BotToken: "<YOUR_BOT_TOKEN>",
    })

    if err != nil {
        log.Fatal(err)
    }

    host := "https://app.X.X.X.X.nip.io" // For example: "https://example.com"
    webhookPath := "<YOUR_WEBHOOK_PATH>" // For example: "/telegram_webhook"

    cert, _ := os.Open("./cert.pem")
    ok, err := telegraphist.SetWebhook(&Telegram.SetWebhookParams{
        URL:         combineURL(host, webhookPath),
        Certificate: cert,
    })

    if err != nil {
        log.Fatal(err)
    }

    if !ok {
        log.Println("Something went wrong and the webhook wasn't set up")
    }

    handlers := map[string]func(update Telegram.Update) error{
        // "message":              func(update Telegram.Update) error {},
        // "edited_message":       func(update Telegram.Update) error {},
        // "channel_post":         func(update Telegram.Update) error {},
        // "edited_channel_post":  func(update Telegram.Update) error {},
        // "inline_query":         func(update Telegram.Update) error {},
        // "chosen_inline_result": func(update Telegram.Update) error {},
        // "callback_query":       func(update Telegram.Update) error {},
        // "shipping_query":       func(update Telegram.Update) error {},
        // "pre_checkout_query":   func(update Telegram.Update) error {},
        // "poll":                 func(update Telegram.Update) error {},
        "always": func(update Telegram.Update) error {
            js, _ := json.MarshalIndent(update, "", "\t")
            fmt.Println(string(js))
            return nil
        },
    }

    err = Telegraphist.NewServer(&Telegraphist.ServerConfig{
        EnableHTTPS: true,
        Webhook:     webhookPath,
    }, &handlers)

    if err != nil {
        log.Fatal(err)
    }
}

NOTE: Use this example only for testing purposes, for production use something like nginx or traefik to serve HTTPS (and/or to (re)generate Let's Encrypt certificate).

License

Telegraphist is released under the MIT License.


*Note that all licence references and agreements mentioned in the Telegraphist README section above are relevant to that project's source code only.