54 lines
1.7 KiB
Bash
54 lines
1.7 KiB
Bash
#!/usr/bin/env bash
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# This script sends a message to Telegram.
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# Every single line will be interpreted as a message update thus the message will be edited with the new content.
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# exit if any command fails
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usage() {
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echo "Usage: $(basename $0) <chat_id>"
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}
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if [ ! $# -eq 1 ]; then
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usage
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exit 1
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fi
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if [ -z $TELEGRAM_BOT_TOKEN ]; then
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echo "TELEGRAM_BOT_TOKEN must be set"
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exit 1
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fi
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TELEGRAM_CHAT_ID="$1"
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mid=
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retry_after=
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last_update=$(date +%s)
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last_line=
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while read -r line
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do
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last_line="$line"
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if [ -z $mid ]; then
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R=$(curl --silent "https://api.telegram.org/bot$TELEGRAM_BOT_TOKEN/sendMessage?disable_web_page_preview=true&chat_id=$TELEGRAM_CHAT_ID" --data-urlencode "text=$line")
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mid=$(echo "$R" | jq -e '.result.message_id')
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else
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elapsed=$(( $(date +%s) - $last_update ))
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if [ $(( $elapsed < 1 )) ]; then
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continue
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fi
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R=$(curl --silent "https://api.telegram.org/bot$TELEGRAM_BOT_TOKEN/editMessageText?disable_web_page_preview=true&chat_id=$TELEGRAM_CHAT_ID&message_id=$mid" --data-urlencode "text=$line")
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# check for 429 Too Many Requests
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retry_after=$(echo "$R" | jq -e '.parameters.retry_after')
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if [ $? -eq 0 ]; then
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echo "Received 429 Too Many Requests. Waiting for $retry_after seconds ..."
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sleep $retry_after
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fi
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fi
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last_update=$(date +%s)
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# https://core.telegram.org/bots/faq#my-bot-is-hitting-limits-how-do-i-avoid-this
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sleep 1
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done < "${2:-/dev/stdin}"
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# final update
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curl --silent "https://api.telegram.org/bot$TELEGRAM_BOT_TOKEN/editMessageText?disable_web_page_preview=true&chat_id=$TELEGRAM_CHAT_ID&message_id=$mid" --data-urlencode "text=$last_line"
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