🍄 Just shroomp it!

You want to redirect from your domain to a specific URL but all you have is a DNS? Just shroomp it.

Shroomp is a fungi powered URL forwarding service in few lines of Bash thanks to HTTP.SH.

Made by j-g00da, running on fungus.

But how do I shroomp it?

First, create a TXT record for your domain with the following format:


_shroomp.yourdomain.com. IN TXT "to=https://example.com/anywhere/you/want"

You can even redirect from a specific URL! Just change slashes to underscore and glue this to the subdomain of the TXT record, e.g.:


_shroomp_some_path.yourdomain.com. IN TXT "to=https://example.com/anywhere/you/want"

This will result in a redirect from http://yourdomain.com/some/path to https://example.com/anywhere/you/want.

Amazing! You wouldn't believe a mushroom can do this!

More config options in the future.

You will also need to point your domain to the shroomp service IP:


yourdomain.com. IN A 46.224.123.219
yourdomain.com. IN AAAA 2a01:4f8:1c1a:4dce::

Alternatively, if you want to make a redirect from a subdomain, you can just create a CNAME record:


sub.yourdomain.com. IN CNAME shroomp.kamiokan.de.

Of course these redirects only work from http as I'm not capable of issuing a wildcard certificate for the whole Internet (yet).

Source code available on.. wait... literally here:

app/webroot/index.shs


#!/bin/bash

extract_txt_val() {
  local key="$1"
  local record="$2"
  # this is absolutely crazy, don't touch it
  echo "$record" \
    | sed -n "s/.*\(^\|;\)${key}=\([^;]*\).*/\2/p" \
    | head -n1
}

# The TXT record subdomain is _shroomp for source domains with no path, e.g.
# example.com -> _shroomp.example.com
# For URLs with paths, e.g. example.com/some/path we normalize the URL and glue it to _shroomp, e.g.:
# example.com/some/path -> _shroomp_some_path.example.com
# This way we can define not only domain -> URL redirects
# But also URL -> URL redirects :D
get_txt_domain() {
  local domain="$1"
  local path="$2"
  local normalized_path
  normalized_path=$(echo "${path}" | sed 's/\//_/g; s/_//')
  if [[ "${normalized_path}" != "" ]]; then
    echo "_shroomp_${normalized_path}.${domain}"
  else
    echo "_shroomp.${domain}"
  fi
}

shroomp_domain="${cfg[domain]}"
shroomp_ipv4="${cfg[ipv4]}"
shroomp_ipv6="${cfg[ipv6]}"

source_domain="${r[host]}"

if [[ "$source_domain" == "$shroomp_domain" ]]; then
  src=$(cat app/webroot/index.shs | sed 's/&/\&amp;/g; s/</\&lt;/g; s/>/\&gt;/g; s/"/\&quot;/g; s/'"'"'/\&#39;/g')
  echo '
    <head>
      <meta name="color-scheme" content="light dark">
      <!-- Literally copied from bettermotherfuckingwebsite.com -->
      <style type="text/css">body{margin:40px auto;max-width:900px;line-height:1.6;font-size:16px;padding:0 10px}h1,h2,h3{line-height:1.2}</style>
    </head>
    <body>
      <h1>
        &#127812;
        <img
          alt="blob cat wobbling aggressively"
          src="https://github.com/DuckOfDisorder/BlobCats/blob/main/GIFs%20and%20APNGs/GIFs/A_BlobCat_Wobble.gif?raw=true" height="41px"/>
        Just shroomp it!
      </h1>
      <p>You want to redirect from your domain to a specific URL but all you have is a DNS? Just shroomp it.</p>
      <p>Shroomp is a fungi powered URL forwarding service in few lines of Bash thanks to <a href="https://git.sakamoto.pl/domi/http.sh">HTTP.SH</a>.</p>
      <p>Made by <a href="https://jslazak.com/">j-g00da</a>, running on fungus.</p>

      <br>
      <h2> But how do I shroomp it?</h2>
      <h3>First, create a TXT record for your domain with the following format:</h3>
      <mark><code>
_shroomp.yourdomain.com. IN TXT "to=https://example.com/anywhere/you/want"
      </code></mark>
      <p>You can even redirect from a specific URL! Just change slashes to underscore and glue this to the subdomain of the TXT record, e.g.:</p>
      <mark><code>
_shroomp_some_path.yourdomain.com. IN TXT "to=https://example.com/anywhere/you/want"
      </code></mark>
      <p>This will result in a redirect from <code>http://yourdomain.com/some/path</code> to <code>https://example.com/anywhere/you/want</code>.</p>
      <b>Amazing! You wouldn'"'"'t believe a mushroom can do this!</b>
      <p>More config options in the future.</p>
      <br>
      <h3>You will also need to point your domain to the shroomp service IP:</h3>
      <pre><code>
yourdomain.com. IN A '"${shroomp_ipv4}"'
yourdomain.com. IN AAAA '"${shroomp_ipv6}"'
      </code></pre>
      <p>Alternatively, if you want to make a redirect from a subdomain, you can just create a CNAME record:</p>
      <pre><code>
sub.yourdomain.com. IN CNAME '"${shroomp_domain}"'.
      </code></pre>
      <p>Of course these redirects only work from http as I'"'"'m not capable of issuing a wildcard certificate for the whole Internet (yet).</p>
      <br>
      <h2>Source code available on.. wait... literally here:</h2>
      <details>
        <summary>app/webroot/index.shs</summary>
        <pre><code>
'"${src}"'
        </code></pre>
      </details>
      <p>Licensed under BSD3.</p>

      <a href="https://servfail.network">
        <img src="https://beta.servfail.network/servfail-88_31.png" alt="SERVFAIL DNS written on a 14 segment display. Next to it is a pentagram made out of burning servers.">
      </a>
      <p>This spore uses SERVFAIL DNS to DNS its FAILS.</p>
      <marquee>I don'"'"'t need no CSS! ...ok maybe just a little</marquee>
      <q>straight up shroomping it</q>
      ~ <em><a href="https://sdomi.pl/">domi</a></em>
    </body>
  '
else
  # THE ACTUAL REDIRECT LOGIC STARTS HERE LOL

  txt_domain=$(get_txt_domain "${source_domain}" "${r[url]}")
  txt=$(dig +short TXT "${txt_domain}." | tr -d '"')

  target_url=$(extract_txt_val to "$txt")
  # More options in the future, e.g.:
  #code=$(extract_txt_val code "$txt")

  header "Location: ${target_url}"
fi

Licensed under BSD3.

SERVFAIL DNS written on a 14 segment display. Next to it is a pentagram made out of burning servers.

This spore uses SERVFAIL DNS to DNS its FAILS.

I don't need no CSS! ...ok maybe just a little straight up shroomping it ~ domi