A crude script to extract Meteor methods exposed to the client

meteor-methods.sh

#!/bin/bash

# A crude script to extract Meteor methods exposed to the client.
#
# Be sure to have npm and js-beautify installed.
#   - $ npm install -g js-beautify
#
# Tested on:
#   - GNU bash, version 4.4.19(1)-release (x86_64-pc-linux-gnu)
#   - Meteor 1.8.1
#   - npm 3.5.2
#   - js-beautify@1.10.1
# @author Kert Ojasoo
# Created: July 31, 2019

while getopts ":u:" opt; do
    case $opt in
        u) JS_URL="$OPTARG"
        ;;
        \?) echo "Invalid option -$OPTARG" >&2
        ;;
    esac
done

if [[ "$JS_URL" == "" ]]; then
    echo "Meteor Methods Scraper"
    echo "Usage:"
    echo "$0 -u 'http://localhost:3000/355e110bdcdb733c64348b706c8a03d6848604c4.js' "
    exit 1
fi

npm list -g | grep js-beautify > /dev/null || npm i -g js-beautify
if [ $? -ne 0 ]; then echo "Could not find js-beautify, exiting..." ; exit 1 ; fi

TEMP="site.js" # $(mktemp)

echo "Downloading '$JS_URL' to '$TEMP'..."
curl -s -o $TEMP.1 $JS_URL

echo "Extracting application specific code..."
grep -ve '^$' $TEMP.1 | tail -1 > $TEMP.2

echo "Beautifing javascript..."
js-beautify $TEMP.2 > $TEMP.3
cp $TEMP.3 $TEMP

echo "Finding methods from '.call(\"'..."
METHODS=$(grep -oP '(?<!Spacebars)\.call\(".*$' $TEMP.3 | cut -d '"' -f 2)
echo "$METHODS" > $TEMP.methods

echo "Sorting found methods..."
GREEN='\033[1;32m'
NC='\033[0m'

for method in $(cat $TEMP.methods | sort | uniq); do
    echo -e "${GREEN}$method${NC}"
done

echo "Cleaning temporary files..."
rm $TEMP.*

echo "Done."