ngrok_hostname.sh

# #!/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 \
#   | ggrep -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 "$hosts" | ggrep "^${PROTO}:"
curl "localhost:4040/api/tunnels" | jq -r '.tunnels[1].public_url'