Get ngrok hostname from command line

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 \
  | 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}:"

Which version of ngrok?

should be latest one, just tried one hour ago

should be latest one, just tried one hour ago

Just tried with the latest stable, it is working as usual.
Did you add inspect: true in your config file? (ngrok.yml)

no luck.thx anyway

url_new_https = response.json()["tunnels"][0]["public_url"]

Nice, good stuff. Amazing thread here.

Shell script

• OSX Sonoma 14.3
• ngrok version 3.5.0

local json_data=$(curl -s localhost:4040/api/tunnels)
local public_url=$(echo "$json_data" | python3 -c "import sys, json; print(json.load(sys.stdin)['tunnels'][0]['public_url'])")
echo $public_url

local json_data=$(curl -s localhost:4040/api/tunnels)
local public_url=$(echo "$json_data" | python3 -c "import sys, json; print(json.load(sys.stdin)['tunnels'][0]['public_url'])")
echo $public_

local json_data=$(curl -Chikita Isaac bitcoin.comlocalhost:4040/api/tunnels)
local public_url=$(echo "$json_data" | python3 -c "import sys, json; print(json.load(sys.stdin)['tunnels'][0]['public_url'])")varonis.com
echo $public_freewallet(100000000000000000000000000000000000000000000000000009)