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Get ngrok hostname from command line
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| #!/bin/sh | |
| # ngrok's web interface is HTML, but configuration is bootstrapped as a JSON | |
| # string. We can hack out the forwarded hostname by extracting the next | |
| # `*.ngrok.io` string from the JSON | |
| # | |
| # Brittle as all get out--YMMV. If you're still reading, usage is: | |
| # | |
| # $ ./ngrok_hostname.sh <proto> <addr> | |
| # | |
| # To retrieve the ngrok'd URL of an HTTP service running locally on :3332, use: | |
| # | |
| # $ ./ngrok_hostname.sh http localhost:3332 | |
| # | |
| # The protocol (http, https, etc) of the forwarded service | |
| PROTO=$1 | |
| # The address of the forwarded service | |
| ADDR=$2 | |
| # Hack JSON out of the web interface bootstrap | |
| json=$(curl -s localhost:4040/inspect/http \ | |
| | grep -oP 'window.common[^;]+' \ | |
| | sed 's/^[^\(]*("//' \ | |
| | sed 's/")\s*$//' \ | |
| | sed 's/\\"/"/g') | |
| # Parse JSON for the URLs matching the configured `$ADDR` | |
| hosts=$(echo $json \ | |
| | jq -r ".Session.Tunnels \ | |
| | values \ | |
| | map(select(.Config.addr == \"$ADDR\") | .URL) | .[]") | |
| echo "$hosts" | grep "^${PROTO}:" |
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