#!/bin/bash
echo "Content-type: application/json"
echo
url="$(echo -n "$REQUEST_URI" | sed "s/^\/cgi-bin\/json?url=//g")"

if ! [[ "$url" =~ ^https?:// ]] && ! [[ "$url" =~ ^ipfs:// ]]; then
    echo "Error: Invalid link."
else
    if [[ "$url" =~ ^https?://(localhost|127\.|10\.|172\.16\.|172\.17\.|172\.18\.|172\.19\.|172\.20\.|172\.21\.|172\.22\.|172\.23\.|172\.24\.|172\.25\.|172\.26\.|172\.27\.|172\.28\.|172\.29\.|172\.30\.|172\.31\.|192\.168\.|169\.254\.) ]]; then
        echo "Error: Nonpublic URL"
    else
        # Not "curl -L" as some websites redirect to localhost
        if [[ "$url" =~ ^ipfs:// ]]; then
            url2="$(echo "$url" | sed "s/^ipfs../http:\/\/127.0.0.1:8080\/ipfs\//g")"
            curl -sk --max-redirs 0 "$url2" | jq
        else
            curl -sk --max-redirs 0 "$url" | jq
        fi
    fi
fi