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GNU AFFERO GENERAL PUBLIC LICENSE
Version 3, 19 November 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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For more information on this, and how to apply and follow the GNU AGPL, see
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===============================================================================
DISTRIBUTE-COIN Seize the tokens ♥
===============================================================================
distribute-coin's a privacy-focused image-uploading and URL-shortening
service. It doesn't have bells and whistles like accounts or cookies,
JS or tracking… which you might consider good things.
I think they're awful.
Probably the one bell it has is that it's backed up by IPFS. Whenever you
upload a file, it's 'added' to IPFS and pinned to the gateway. Then, a
shortened URL (containing the file-name you chose/came with the file) is
created that redirects to the actual IPFS URL.
----------------------------------------
USAGE
----------------------------------------
Just use `quicklisp` (pop this in your "~/quicklisp/local-projects/",
and you're good).
There is one thing that isn't in quicklisp that this needs, though:
* ipfs-gno (https://git.eunichx.us/ipfs-gno.git)
Once you've loaded :distribute-coin into your REPL, just run:
(distribute-coin:server)
You might wanna look at the docstrings for more information, esp.
on usage of #'server.
----------------------------------------
BORING STUFF
----------------------------------------
License is AGPLv3-- check COPYING.txt.
Author is Jaidyn Ann <jadedctrl@teknik.io>
Permanent instance over at https://coinsh.red
Sauce is at https://git.eunichx.us/distribute-coin.git

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(defsystem "distribute-coin"
:version "0.1"
:author "Jaidyn Ann <jadedctrl@teknik.io>"
:license "Cooperative Software License"
:depends-on ("hunchentoot" "translate" "html-template" "ipfs-gno")
:components ((:module "src"
:components
((:file "package")
(:file "util")
(:file "sanitize")
(:file "handle-requests")
(:file "main"))))
:description
"An IPFS-backed file-uploading & URL-shortening website.")

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body
{
background-color: #FAE3E3;
margin: 0 0 0 0;
font-style: sans;
font-family: 'ConnectionRegular';
font-weight: normal;
text-align: center;
}
footer
{
background-color: #F7D4BC;
position: fixed;
left: 0;
bottom: 0;
padding-top: 5px;
width: 100%;
}
img
{
width: 280px;
}
main
{
padding-top: 20px;
padding-bottom: 20px;
}
.menu h2 a
{
color: #000000;
text-decoration: none;
}
.basic-text
{
width: 300px;
}
.menu
{
background-color: #C98BB9;
width: 100%;
margin: 0;
padding-bottom: 5px;
}
.menu h1, .menu h2, .menu h3
{
margin: 0;
background-color: #CFA5B4;
}
.menu ul
{
overflow:hidden
}
.menu li
{
width: 25%;
display: block;
float: left;
}
.top-menu li
{
font-size: 20px;
width: 50%;
}
#duck
{
margin-left: 10px;
margin-top: 10px;
width: 25px;
}
article
{
max-width: 800px;
text-align: justify;
text-indent: 15px;
margin: auto;
}
article h1,h2
{
text-align: center;
}

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<form action="<?php echo webroot("private/beam.php")?>"
method="post" enctype="multipart/form-data">
<p>
<input type="text" placeholder="Filename (Blank for uploaded name)"
name="desired_filename" class="basic-text">
</p>
<p>
<input type="text" placeholder="Source (Optional)"
name="file_source" class="basic-text">
</p>
<input type="file" name="uploadcoin" id="uploadcoin"
style="margin: 0 auto">
<input style="margin-top: 10px; margin-bottom: 10px" type="submit"
value="INSERT <?php echo(strtoupper($GLOBALS["file_beam_item"])); ?>" name="submit">
</form>

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<p>Thanks for feeding me; it'll be in safe hands</p>
<p>Your coin's <a href="<?php echo($GLOBALS["coin_url"]); ?>">over here</a></p>
<p><b><?php echo($GLOBALS["coin_url"]); ?></b></p>
<p>It's meta-stuff (or lack thereof) is
<a href="<?php echo($GLOBALS["coin_url"] . ".txt"); ?>">here</a></p>

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<p>You didn't upload anything, dope.</p>
<p>Try again.</p>

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<p>Er, that coin already exists— try a different file-name.</p>

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<p>What the hell just happened? :o</p>
<p>I dunno, but maybe you should give it another go?</p>

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<form action="/private/beam.php"
method="post" enctype="multipart/form-data">
<p>
<input type="text" placeholder="Filename (Blank for uploaded name)"
name="desired_filename" class="basic-text">
</p>
<p>
<input type="text" placeholder="Source (Optional)"
name="file_source" class="basic-text">
</p>
<input type="file" name="uploadcoin" id="uploadcoin"
style="margin: 0 auto">
<input style="margin-top: 10px; margin-bottom: 10px" type="submit"
value="INSERT COIN" name="submit">
</form>
<img
alt="A big & yellow coin lying before a coin-slot"
src="<!-- TMPL_VAR depth -->r/coin-big.png">

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<footer>
<div class="menu">
<h3>friends ✿ <a href="<!-- TMPL_VAR depth -->i/">info</a></h3>
<ul>
<li><a href="https://raddle.me">raddle</a></li>
<li><a href="https://albertoefg.info">efg</a></li>
<li><a href="https://jadedmeta.xyz">jadedmeta</a></li>
<li><a href="https://libregamenight.xyz">lgn</a></li>
<li><a href="https://fsf.org">fsf</a></li>
<li><a href="https://eunichx.us">eunichx</a></li>
<li><a href="http://4wxnumwn5zljjkyi.onion/">
onion</a></li>
<li><b><a href="https://git.eunichx.us/insert-coin.git">
source-code</a></b></li>
</ul>
</div>
</footer>
</html>

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<!DOCTYPE html>
<html lang="en">
<head>
<!-- THIS ENTIRE FILE IS UNDER THE AGPLv3+
https://www.gnu.org/licenses/agpl-3.0.html -->
<link rel="stylesheet" media="screen"
href="https://fontlibrary.org/face/connection" type="text/css"/>
<link rel="stylesheet" type="text/css"
href="<!-- TMPL_VAR depth -->r/style.css">
<link rel="shortcut icon" href="<!-- TMPL_VAR depth -->r/favicon.png">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title><!-- TMPL_VAR site-name --></title>
</head>
<body>
<div class="menu top-menu">
<h2> <a href="<!-- TMPL_VAR depth -->">
<!-- TMPL_VAR site-name -->
</a>
<!-- <a href="<!-- TMPL_VAR depth -->d/"> -->
<img id="duck"
src="<!-- TMPL_VAR depth -->r/war_duck.png"
alt="Warduck lives!">
<!-- </a> -->
</h2>
<ul>
<li><a href="<!-- TMPL_VAR depth -->p/">file-beamer</a></li>
<li><a href="<!-- TMPL_VAR depth -->u/">url-shortener</a></li>
</ul>
</div>

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<h1>Info</h1>
<article><a href="what"><h2>What?<h2></a></article>
<article><a href="privacy"><h2>Privacy?<h2></a></article>
<article><a href="tos"><h2>ToS?<h2></a></article>

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<article>
<section>
<h1>Privacy Policy</h1>
<p>No data based on visits are recorded, period. No logs are stored, no IP
addresses are recorded, and no-one can be tied to any specific file-upload.
</p>
<p>The only data saved is what you explicitly provide:
<ul>
<li>Metadata embedded in the file</li>
<li>The file-name you provide</li>
<li>The optional “Source” text</li>
</ul>
</p>
No cookies are used, except for the “LANG” cookie, which is only
created when you manually change the language from the default as detected.
You'll be warned when that happens, ofc.
</section>
<hr />
<section>
<h2>Privacy Tips</h2>
<p>To keep safe on coinsh.red (and, y'know, the web in general), try some of
this:</p>
<ul>
<li>Use <a href="https://torproject.org">Tor</a>
and Tor Browser
<ul>
<li>coinsh.red has a Tor hidden service you
can use
<a href="http://4wxnumwn5zljjkyi.onion/">
here</a>
</li>
</ul>
</li>
<li>Run LiGNUx, instead of <a
href="https://gnu.org/proprietary/malware-microsoft.html">
Windows</a> or
<a href="https://gnu.org/proprietary/malware-apple.html">
OSX</a>
</li>
<li>Scrape metadata from files you upload whenever possible
<ul>
<li>Including here. PNG and JPG files are
automatically scraped, but you'll need to
manually take care of other filetypes
</li>
</ul>
</li>
</ul>
<p>That's really just some bare-bones stuff.</p>
<p>You should probably check out the Raddle Wiki
<a href="https://raddle.me/wiki/basic_security">Basic Security</a>
(<a href="http://lfbg75wjgi4nzdio.onion/wiki/basic_security">Onion</a>)
guide for some more in-depth stuff.
</p>
</section>
</article>

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<article>
<h1>The “Terms”</h1>
<p>Basically anything you upload is fair game.</p>
<p>If I get a letter from authorities or what have you (DMCA, etc.), though,
there's a good chance I'll remove the alias to your file, and unpin it
from my IPFS gateway.
</p>
<p>You might wanna check out the <a href="privacy">privacy policy</a> page,
while you're at it.
</p>
<aside>
<p>(Have I mentioned how much I hate these detached, jargony terms:
“terms of service”, “privacy policy”,
etc? I'm not saying they're not important, they are, but it feels
kind of weird how they're almost always named exactly the same way
everywhere, that unsettling homogeneity. Oh well.)
</p>
</aside>
</article>

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<article>
<section>
<h1>Er, what <em>is</em> this?</h1>
<p>Another generic, privacy-centered file-host.</p>
<p>Well, except that this one is backed by <a href="https://ipfs.io">IPFS</a>,
the Interplanetary File System-- so your files are permanent and distributed!
Whenever you upload a file, you get an alias (AKA, shortened URL) that redirects
to the file on IPFS.</p>
</section>
<hr />
<section>
<h2>And the software?</h2>
<p>coinsh.red runs on what I call
<a href="https://git.eunichx.us/distribute-coin">distribute-coin</a>,
a libre/copyleft web service (licensed under the GNU AGPLv3)
written in Common Lisp. It's the successor to
<a href="https://git.eunichx.us/insert-coin">insert-coin</a>, which
just suckeddd.
</p>
</section>
</article>

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<p>Thanks for feeding me; it'll be in safe hands</p>
<p>Your <?php echo(strtolower($GLOBALS["url_aliasize_item"])); ?>'s
<a href="<?php echo($GLOBALS["mask_url"]); ?>">over here</a></p>
<p><b><?php echo($GLOBALS["mask_url"]); ?></b></p>

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<form action="<?php echo webroot("private/create.php")?>"
method="post" enctype="multipart/form-data">
<p>
<input type="text" placeholder="URL"
name="url_target" class="basic-text">
</p>
<p>
<input type="text" placeholder="Alias (Shortened URL)"
name="url_alias" class="basic-text">
</p>
<input style="margin-top: 10px; margin-bottom: 10px" type="submit"
value="FORGE <?php echo(strtoupper($GLOBALS["url_aliasize_item"])); ?>" name="submit">
</form>

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<p>You didn't type in anything...</p>
<p>Come on, you can do better than that. :s</p>

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<p>Er, that <?php echo(strtolower($GLOBALS["url_aliasize_item"])); ?>
already exists, try a different alias.</p>

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<p>Now, mate, that wasn't an actual URL.</p>
<p>You had <i>one</i> job!...</p>

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<p>What the hell just happened? :o</p>
<p>I dunno, but maybe you should give it another go?</p>

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<div class="menu top-menu">
<h2> <a href="<?php echo webroot(""); ?>">
<?php echo($GLOBALS["site_name"]); ?>
</a>
<a href="<?php echo webroot("d"); ?>">
<img id="duck"
src="<?php echo webroot("res/img/war_duck.png") ?>"
alt="Warduck lives!">
</a>
</h2>
<ul>
<li><a href="<?php echo webroot("coin.php"); ?>">file-beamer</a></li>
<li><a href="<?php echo webroot("mask.php") ?>">url-shortener</a></li>
</ul>
</div>

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<div class="menu top-menu">
<h2> <a href="<!-- TMPL_VAR depth -->">
insert-coin
</a>
<a href="<!-- TMPL_VAR depth -->d/">
<img id="duck"
src="<!-- TMPL_VAR depth -->r/war_duck.png"
alt="Warduck lives!">
</a>
</h2>
<ul>
<li><a href="<!-- TMPL_VAR depth -->p/">file-beamer</a></li>
<li><a href="<!-- TMPL_VAR depth -->u/">url-shortener</a></li>
</ul>
</div>

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<p>Er, a file with that name already exists— try a different name.</p>
<img src="<!-- TMPL_VAR depth -->r/coin_die-big.png">

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<form action="/p/null" method="POST" enctype="multipart/form-data">
<p>
<input type="text" placeholder="Filename (Blank for uploaded name)"
name="filename" class="basic-text">
</p>
<input type="file" name="file" id="file"
style="margin: 0 auto">
<input style="margin-top: 10px; margin-bottom: 10px" type="submit"
value="INSERT COIN" name="submit">
</form>
<img
alt="A big & yellow coin lying before a coin-slot"
src="<!-- TMPL_VAR depth -->r/coin-big.png">

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<h2>404</h2>
<p>Either that doesn't exist, or I couldn't manage to conjure it
into existence.</p>
<p>Try again.</p>
<img src="<!-- TMPL_VAR depth -->r/coin_die-big.png">

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<p>Your coin's
<a href="<!-- TMPL_VAR hostname --><!-- TMPL_VAR depth -->u/<!-- TMPL_VAR filename -->">over here.</a></p>
<h3><!-- TMPL_VAR hostname --><!-- TMPL_VAR depth -->u/<!-- TMPL_VAR filename --></h3>
<!-- TMPL_IF onion-hostname -->
<h3><!-- TMPL_VAR onion-hostname --><!-- TMPL_VAR depth -->u/<!-- TMPL_VAR filename --></h3>
<!-- /TMPL_IF -->
<h5><!-- TMPL_VAR ipfs-hostname -->/ipfs/<!-- TMPL_VAR hash --></h5>
<h5>https://ipfs.io/ipfs/<!-- TMPL_VAR hash --></h5>
<img src="<!-- TMPL_VAR depth -->r/coin_win-big.png">

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<h2>409</h2>
<p>Er, that mask already exists-- try a different alias.</p>
<img src="<!-- TMPL_VAR depth -->r/mask_die-big.png">

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<form action="/u/null" method="POST" enctype="multipart/form-data">
<p>
<input type="text" placeholder="URL ('https://news.com', etc)"
name="target" class="basic-text">
</p>
<p>
<input type="text" placeholder="Alias ('dog', 'apple')"
name="alias-name" class="basic-text">
</p>
<input style="margin-top: 10px; margin-bottom: 10px" type="submit"
value="INSERT COIN" name="submit">
</form>
<img
alt="A big, funny mask with a stupid mustache and glasses."
src="<!-- TMPL_VAR depth -->r/mask-big.png">

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<h2>404</h2>
<p>No such URL or alias!</p>
<p>Come on, you can do better than that. :s</p>
<img src="<!-- TMPL_VAR depth -->r/mask_die-big.png">

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<p>Your mask is
<a href="<!-- TMPL_VAR protocol --><!-- TMPL_VAR hostname --><!-- TMPL_VAR depth -->u/<!-- TMPL_VAR alias-name -->">over here.</a></p>
<h3><!-- TMPL_VAR target --></h3>
<h3>↓</h3>
<h3><!-- TMPL_VAR hostname --><!-- TMPL_VAR depth -->u/<!-- TMPL_VAR alias-name --></h3>
<!-- TMPL_IF onion-hostname -->
<h3><!-- TMPL_VAR onion-hostname --><!-- TMPL_VAR depth -->u/<!-- TMPL_VAR alias-name --></h3>
<!-- /TMPL_IF -->
<img src="<!-- TMPL_VAR depth -->r/mask_win-big.png">

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(firefox:1809): Gtk-WARNING **: 12:54:17.007: Theme parsing error: gtk-keys.css:12:4: Failed to parse binding set.
(firefox:1809): Gtk-WARNING **: 12:54:17.007: Theme parsing error: gtk-keys.css:12:4: Expected semicolon
(firefox:1809): Gtk-WARNING **: 12:54:17.009: Theme parsing error: gtk-keys.css:14:4: Failed to parse binding set.
(firefox:1809): Gtk-WARNING **: 12:54:17.010: Theme parsing error: gtk-keys.css:14:4: Expected semicolon
(firefox:1809): Gtk-WARNING **: 12:54:17.012: Theme parsing error: gtk-keys.css:16:4: Failed to parse binding set.
(firefox:1809): Gtk-WARNING **: 12:54:17.013: Theme parsing error: gtk-keys.css:16:4: Expected semicolon
(firefox:1809): Gtk-WARNING **: 12:54:17.014: Theme parsing error: gtk-keys.css:18:4: Failed to parse binding set.
(firefox:1809): Gtk-WARNING **: 12:54:17.016: Theme parsing error: gtk-keys.css:18:4: Expected semicolon
(firefox:1809): Gtk-WARNING **: 12:54:17.017: Theme parsing error: gtk-keys.css:20:4: Failed to parse binding set.
(firefox:1809): Gtk-WARNING **: 12:54:17.019: Theme parsing error: gtk-keys.css:20:4: Expected semicolon
(firefox:1809): Gtk-WARNING **: 12:54:17.020: Theme parsing error: gtk-keys.css:26:4: Failed to parse binding set.
(firefox:1809): Gtk-WARNING **: 12:54:17.022: Theme parsing error: gtk-keys.css:26:4: Expected semicolon
(firefox:1809): Gtk-WARNING **: 12:54:17.023: Theme parsing error: gtk-keys.css:28:4: Failed to parse binding set.
(firefox:1809): Gtk-WARNING **: 12:54:17.025: Theme parsing error: gtk-keys.css:28:4: Expected semicolon
(firefox:1809): Gtk-WARNING **: 12:54:17.027: Theme parsing error: gtk-keys.css:33:18: The 'gtk-key-bindings' property has been renamed to '-gtk-key-bindings'
(firefox:1809): Gtk-WARNING **: 12:54:17.028: Theme parsing error: gtk-keys.css:37:18: The 'gtk-key-bindings' property has been renamed to '-gtk-key-bindings'
(firefox:1809): Gtk-WARNING **: 12:54:17.029: Theme parsing error: gtk-keys.css:41:18: The 'gtk-key-bindings' property has been renamed to '-gtk-key-bindings'
(/usr/local/lib/firefox/firefox:16947): Gtk-WARNING **: 17:54:18.347: Theme parsing error: gtk-keys.css:12:4: Failed to parse binding set.
(/usr/local/lib/firefox/firefox:16947): Gtk-WARNING **: 17:54:18.349: Theme parsing error: gtk-keys.css:12:4: Expected semicolon
(/usr/local/lib/firefox/firefox:16947): Gtk-WARNING **: 17:54:18.350: Theme parsing error: gtk-keys.css:14:4: Failed to parse binding set.
(/usr/local/lib/firefox/firefox:16947): Gtk-WARNING **: 17:54:18.351: Theme parsing error: gtk-keys.css:14:4: Expected semicolon
(/usr/local/lib/firefox/firefox:16947): Gtk-WARNING **: 17:54:18.353: Theme parsing error: gtk-keys.css:16:4: Failed to parse binding set.
(/usr/local/lib/firefox/firefox:16947): Gtk-WARNING **: 17:54:18.354: Theme parsing error: gtk-keys.css:16:4: Expected semicolon
(/usr/local/lib/firefox/firefox:16947): Gtk-WARNING **: 17:54:18.356: Theme parsing error: gtk-keys.css:18:4: Failed to parse binding set.
(/usr/local/lib/firefox/firefox:16947): Gtk-WARNING **: 17:54:18.357: Theme parsing error: gtk-keys.css:18:4: Expected semicolon
(/usr/local/lib/firefox/firefox:16947): Gtk-WARNING **: 17:54:18.359: Theme parsing error: gtk-keys.css:20:4: Failed to parse binding set.
(/usr/local/lib/firefox/firefox:16947): Gtk-WARNING **: 17:54:18.360: Theme parsing error: gtk-keys.css:20:4: Expected semicolon
(/usr/local/lib/firefox/firefox:16947): Gtk-WARNING **: 17:54:18.361: Theme parsing error: gtk-keys.css:26:4: Failed to parse binding set.
(/usr/local/lib/firefox/firefox:16947): Gtk-WARNING **: 17:54:18.363: Theme parsing error: gtk-keys.css:26:4: Expected semicolon
(/usr/local/lib/firefox/firefox:16947): Gtk-WARNING **: 17:54:18.364: Theme parsing error: gtk-keys.css:28:4: Failed to parse binding set.
(/usr/local/lib/firefox/firefox:16947): Gtk-WARNING **: 17:54:18.366: Theme parsing error: gtk-keys.css:28:4: Expected semicolon
(/usr/local/lib/firefox/firefox:16947): Gtk-WARNING **: 17:54:18.367: Theme parsing error: gtk-keys.css:33:18: The 'gtk-key-bindings' property has been renamed to '-gtk-key-bindings'
(/usr/local/lib/firefox/firefox:16947): Gtk-WARNING **: 17:54:18.369: Theme parsing error: gtk-keys.css:37:18: The 'gtk-key-bindings' property has been renamed to '-gtk-key-bindings'
(/usr/local/lib/firefox/firefox:16947): Gtk-WARNING **: 17:54:18.370: Theme parsing error: gtk-keys.css:41:18: The 'gtk-key-bindings' property has been renamed to '-gtk-key-bindings'

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(in-package :distribute-coin)
;; -------------------------------------
;; handler-creation
(defmacro create-regex-dispatcher (regex page-function)
"Just like tbnl:create-regex-dispatcher except it passes the entire
uri split into a list by slashes.
I.E., '/d/b/123/4' would pass arguments 'd', 'b', '123', and '4'.
Based on:
http://uint32t.blogspot.com/2007/12/restful-handlers-with-hunchentoot.html"
`(push (let ((scanner (cl-ppcre:create-scanner ,regex)))
(lambda (request)
(multiple-value-bind (whole-match matched-registers)
(cl-ppcre:scan-to-strings scanner (tbnl:script-name request))
(when whole-match
(lambda ()
(apply ,page-function
(cdr (cl-ppcre:split "/" (tbnl:script-name request)))))))))
hunchentoot:*dispatch-table*))
;; -------------------------------------
;; LIST-OF-PATHS (LIST) → STRING
(defun template (templates &optional (env '()))
"Return the output of several (or one) templates as a simple string."
;; (if env (setq env (concatenate 'list env *default-env*))
;; (setq env *default-env*))
(let ((output (make-string-output-stream))
(new-env (concatenate 'list env *default-env*)))
(mapcar (lambda (template)
(html-template:fill-and-print-template
template new-env
:stream output))
templates)
(get-output-stream-string output)))
;; -------------------------------------
;; STRING (STRING) → STRING
(defun template-request (prefix &optional file (env '()))
"Returns the templated-version of a given request.
When given, for example, 'i' and 'what', it returns the template-
processed version of 'res/html/i-what.html', merged with the
'head.html' and 'foot.html' templates."
(when (not file) (setq file "index"))
(let* ((template (pathname (string+ prefix "-" file ".html")))
(template-path (string+ *html-dir* template))
(new-env (concatenate
'list env `(:site-name ,*site-name*
:hostname ,*hostname*
,(if *onion-hostname* :onion-hostname)
,(if *onion-hostname* *onion-hostname*)
:ipfs-hostname ,*ipfs-hostname*))))
(cond ((uiop:file-exists-p template-path)
(template (list #p"head.html" template #p"foot.html") new-env))
('T
(template (list #p"head.html" template #p"foot.html") new-env)))))
;; STRING STRING → NIL
(defmacro standard-file-request (prefix file)
"Return a simple, static file to the client."
`(hunchentoot:handle-static-file (string+ ,prefix ,file)))

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(in-package :distribute-coin)
;; -------------------------------------
;; globals
(defparameter *img-dir* #p"res/img/")
(defparameter *html-dir* #p"res/html/")
(defparameter *css-dir* #p"res/css/")
(defparameter *upload-dir* #p"p/")
(defparameter *alias-dir* #p"u/")
(defparameter *default-env* '(:depth "/"))
(defparameter *hostname* nil)
(defparameter *protocol* nil)
(defparameter *ipfs-hostname* nil)
(defparameter *onion-hostname* nil)
(defparameter *site-name* "distribute-coin ☭")
(defun root-request (&rest ignored)
(template-request "p" "index"))
;; -------------------------------------
;; file-upload/download etc
;; STRING {STRING} → STRING
(defun p-request (p &optional file)
"Handle a /p/* request appropriately."
(if file
(file-request p file)
(template-request p)))
;; STRING STRING → STRING/VARYING
(defun file-request (p GET-filename)
"Handle a /p/ file-request-- I.E., either return a pre-existing uploaded
file, or upload and create a new file. Or return an error. W/e."
(let* ((upload-pair (hunchentoot:post-parameter "file"))
(pair-filename (name-sanitize (ignore-errors (second upload-pair))))
(POST-filename (name-sanitize
(hunchentoot:post-parameter "filename")))
(filename (choose-new-file-name pair-filename POST-filename
(name-sanitize GET-filename)))
(hash nil)
(env `(:filename ,filename)))
(cond
((and upload-pair (alias-exists-p filename))
(setf (hunchentoot:return-code*) hunchentoot:+http-conflict+)
(template-request "p" "already-exists" env))
(upload-pair
(setq hash (file-upload (car upload-pair) filename))
(setq new-env (concatenate 'list `(:hash ,hash) env))
(template-request "p" "success" new-env))
((alias-exists-p filename)
(alias-execute filename))
('T
(setf (hunchentoot:return-code*) hunchentoot:+http-not-found+)
(template-request "p" "no-data")))))
(defun file-upload (temp-location file-name)
(let ((hash (ipfs-gno:add temp-location)))
(alias-create file-name (ipfs-uri hash))
hash))
(defun ipfs-uri (hash)
(string+ *ipfs-hostname* "/ipfs/" hash))
(defun ipns-uri (hash)
(string+ *ipfs-hostname* "/ipns/" hash))
;; -------------------------------------
;; url alias/shortening
;; STRING {STRING} → STRING
(defun u-request (u &optional alias)
"Handle a /u/* request appropriately."
(if alias
(alias-request u alias)
(template-request u)))
;; STRING STRING → STRING
(defun alias-request (u GET-alias-name)
"Handle a /u/ alias-request. I.E., either redirect to another URL-- as per
the alias, or create a new redirect/alias. Or error… tiel la mondo iras."
(let* ((POST-alias-name (name-sanitize
(hunchentoot:post-parameter "alias-name")))
(alias-name (if (zerop (length POST-alias-name))
(name-sanitize GET-alias-name) POST-alias-name))
(POST-target (uri-sanitize (hunchentoot:post-parameter "target")))
(env `(:alias-name ,alias-name :target ,POST-target)))
(cond
((and alias-name POST-target (alias-exists-p alias-name))
(setf (hunchentoot:return-code*) hunchentoot:+http-conflict+)
(template-request "u" "already-exists" env))
((and alias-name POST-target)
(alias-create alias-name POST-target)
(template-request "u" "success" env))
((alias-exists-p alias-name)
(alias-execute alias-name))
('T
(setf (hunchentoot:return-code*) hunchentoot:+http-not-found+)
(template-request "u" "no-data")))))
;; STRING → NIL
(defun alias-execute (alias)
"Actually 'execute' a given alias; I.E., redirect the client to the URL
written in the pathname respective to the given alias-name."
(hunchentoot:redirect (uiop:read-file-line (alias-pathname alias))))
;; STRING STRING → NIL
(defun alias-create (alias target)
"Create an alias to a given URL."
(with-open-file (alias-file (alias-pathname alias) :direction :output
:if-does-not-exist :create)
(format alias-file target)))
;; STRING → BOOLEAN
(defun alias-exists-p (alias)
"Return whether or not an alias of the given name exists."
(uiop:file-exists-p (alias-pathname alias)))
;; STRING → PATHNAME
(defun alias-pathname (alias)
"Return the pathname an alias of the given name would use."
(pathname (string+ *alias-dir* "/" alias)))
;; -------------------------------------
;; STRING STRING → VARYING
(defun res-css-request (r css)
"Serve a CSS resource file."
(standard-file-request *css-dir* css))
;; STRING STRING → VARYING
(defun res-img-request (r image)
"Serve a resource image."
(standard-file-request *img-dir* image))
;; -------------------------------------
;; :NUMBER :PATHNAME :PATHNAME :PATHNAME :PATHNAME → ACCEPTOR
(defun server (&key (hostname nil)
(onion-hostname nil)
(ipfs-hostname nil)
(ipfs-api nil)
(port 80) (upload-dir #p"p/") (alias-dir #p"u/")
(html-dir #p"res/html/") (css-dir #p"res/css/")
(img-dir #p"res/img/") (site-name "distribute-coin ☭"))
"Start the `insert-coin` server. :upload-dir, :html-dir,
and css-dir must contain relative paths to their
respective directories. The :upload-dir must be
writable to the server; the rest must only be
readable."
(setq html-template:*default-template-pathname* html-dir)
(setf *html-dir* html-dir)
(setf *img-dir* img-dir)
(setf *css-dir* css-dir)
(setf *site-name* site-name)
(setf *hostname* (or hostname (string+ "http://127.0.0.1:" port)))
(setf *onion-hostname* onion-hostname)
(setf *ipfs-hostname* (or ipfs-hostname "http://127.0.0.1:8080"))
(setf ipfs-gno:*api-host* (or ipfs-api "http://127.0.0.1:5001"))
(setf *alias-dir* alias-dir)
(setf *upload-dir* upload-dir)
(setf *alias-dir* alias-dir)
(create-regex-dispatcher "/i/.*" #'template-request)
(create-regex-dispatcher "/r/.*\.png" #'res-img-request)
(create-regex-dispatcher "/r/.*\.css" #'res-css-request)
(create-regex-dispatcher "/p/.*" #'p-request)
(create-regex-dispatcher "/u/.*" #'u-request)
(create-regex-dispatcher "^/$" #'root-request)
(hunchentoot:start (make-instance 'hunchentoot:easy-acceptor :port port)))

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(defpackage :distribute-coin
(:use :cl)
(:export
:server
:template))
(in-package :distribute-coin)

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(in-package :distribute-coin)
(defun valid-name-p (string)
(not (cl-ppcre:scan "^null$" string)))
(defun name-sanitize (string)
(if (valid-name-p string)
(replace-all string
'("\.html" "\.html\.txt")
'("\\!" "_") '("\\?" "_")
'("\\" "_") '("/" "_")
'("\\~" "_") '("\\*" "_")
'("\\$" "_") '("\&" "_")
'("\\=" "_") '("\\+" "_")
'("{" "_") '("}" "_")
'("\\[" "_") '("\\]" "_")
'("\\(" "_") '("\\)" "_")
'("<" "_") '(">" "_")
'(" " "_"))))
(defun valid-uri-p (string)
(not (zerop (length string))))
(defun uri-sanitize (string)
(if (valid-uri-p string)
(if (not (cl-ppcre:scan "://" string))
(string+ "https://" string)
string)))

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(in-package :distribute-coin)
;; STRING → BOOLEAN
(defun onion-url (url)
"Return whether or not a given URL is for an onion site."
(cl-ppcre:scan "\.onion" url))
;; STRING PATTERN-PAIR … PATTERN-PAIR → STRING
(defun replace-all (string &rest replace-pairs)
"Apply several sets of regex replacements to a string,
with each replacement in the form of a 'replacement-pair':
'(TARGET REPLACEMENT)
I.E., to replace 'a', you'd use
'('a' 'replacement-of-a')"
(mapcar (lambda (pair)
(setq string
(cl-ppcre:regex-replace-all
(first pair) string (second pair))))
replace-pairs)
string)
;; STRING → STRING
(defun file-type (filename)
"Return the file extension of a given filename."
(setq type-string (cl-ppcre:regex-replace-all ".*\\." filename "\."))
(if (or (zerop (length type-string))
(not (cl-ppcre:scan "\\." filename)))
nil
type-string))
(defun choose-new-file-name (original new-a new-b)
(setq new-name
(cond ((or (and (zerop (length new-a)) (zerop (length new-b)))
(and (not new-a) (not new-b)))
original)
((zerop (length new-a))
new-b)
('T new-a)))
(if (equal new-name "nil") (setq new-name original))
(if (not (file-type new-name))
(string+ new-name (file-type original))
new-name))
;; STRING-A STRING-B … STRING-N → STRING
(defun string+ (&rest strings)
"Combine an arbitrary amount of strings into a single string."
(reduce (lambda (a b) (format nil "~A~A" a b)) strings))