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#### [Examples](../README.md)
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## Bashtbot webhook example
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### Webhooks
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Bashbot default mode is to poll Telegram server for updates but Telegram offers also webhook
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as a more efficient method to deliver updates.
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If your server is reachable from the Internet you can use the webhook method described here.
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#### Setup Apache webhook
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Prerequisite: An Apache webserver with a valid SLL certificate chain and php enabled.
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Prepare Apache to forward webhook to Bashbot:
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- install bashbot as described in [Bashbot Installation](../../doc/0_install.md)
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- create file `data-bot-bash/webhook-fifo`
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- run `bashbot.sh init` to setup bashbot to run as same user as Apache (_e.g. www_)
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- go to apache web root and create directory `telegram/<your_bot_token>`
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- copy all files from `examples/webhook` to new directory and change to it
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- write bashbot installation directory as first line to file `BASHBOT_HOME`
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- execute `php index.php`
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Every call to webhook `https://<yourservername>/telegram/<your_bot_token>/` will execute
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`index.php` and write received JSON to file `data-bot-bash/webhook-fifo`.
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E.g. the URL `https://<yourservername>/telegram/<your_bot_token>/?json={"test":"me"}`
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will append `{"test":"me"}` to the file `data-bot-bash/webhook-fifo`.
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Now your Apache is ready to forward data to Bashbot.
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#### Simple update processing
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To configure simple update processing delete file `data-bot-bash/webhook-fifo` after your webhook is working.
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Every webhook call now forwards incoming Telegram updates to the named pipe `data-bot-bash/webhook-fifo`
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Now enable webhook on Telegram (_see below_).
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Every incoming Telegram update load Bashbot once for processing one command. Even it seems overkill to load
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Bashbot on every update, it's more responsive and create less server load for a low traffic bot.
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*Note:* You must NOT start bashbot when simple update processing is enabled.
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#### High traffic processing
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#### CURRENTLY NOT IMPLEMENTED
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High traffic processing writes Telegram updates to the named pipe `data-bot-bash/webhook-fifo`
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and Bashbot poll them, this is much more efficient than polling Telegram server.
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To switch from `Simple processing` to `High traffic processing` start bashbot as `bashbot.sh start-hook`.
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Stop bashbot with `bashbot.sh stop` to switch back to `Simple processing`
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#### Enable webhook on Telegram
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To get updates via webhook your server must be reachable from the internet and you must
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instruct Telegram where to deliver updates, this is done by calling bashbot function `set_webhook`.
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*Example:*
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```bash
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bin/any_command.sh set_webhook "https://myserver.com/telegram"
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```
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instruct Telegram to use the URL `https://myserver.com/telegram/<your_bot_token>/` to deliver updates.
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After you enable webhook to deliver Telegram updates it's no more possible to poll updates with `bashbot.sh start`.
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To stop delivering of Telegram updates via webhook run `bin/any_command.sh delete_webhook`.
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**Important**: Only https connections with a valid certificate chain are allowed as endpoint for webhook.
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#### $$VERSION$$ v1.40-dev-28-g91a143a
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