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fix path if incomplete, more mime-types, security work

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Codeberg 2019-10-23 23:50:06 +02:00
parent d0ea43788d
commit 369907392e
1 changed files with 68 additions and 27 deletions
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95
var/www/pages/index.php
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@ -1,57 +1,98 @@
<?php
function error($code, $message) {
http_response_code(code);
echo("$code : $message");
die();
function send_response($code, $message) {
http_response_code($code);
echo $message;
exit();
}
$request_url = $_SERVER["PHP_SELF"];
$request_url = filter_var($_SERVER["PHP_SELF"], FILTER_SANITIZE_URL);
if (substr($request_url, -1) == "/") {
$request_url .= "index.html";
if ($request_url === "/") {
send_response(200, "
<html>
<head>
<title>Codeberg Pages</title>
</head>
<body>
<h1>Codeberg Pages. Static Pages for your Project.</h1>
<p>
Create a repo called 'pages' to your user account or org, push static content including HTML+CSS styles, fonts, images.
</p>
<p>
Access your rendered pages via:
<pre>
https://" . $_SERVER["HTTP_HOST"] . "/&lt;username&gt;/
</pre>
</p>
</body>
</html>
");
}
if (preg_match("/\/[a-zA-Z0-9_ +\-\/\.]+\z/", $request_url) != 1) {
error(404, "invalid request URL '$request_url'");
if (preg_match("/^\/[a-zA-Z0-9_ +\-\/\.]+\$/", $request_url) != 1) {
send_response(404, "invalid request URL");
}
$git_prefix = "/data/git/gitea-repositories";
$parts = explode("/", $request_url);
array_shift($parts); # remove empty first
$owner = strtolower(array_shift($parts));
$git_root = "/data/git/gitea-repositories/$owner/pages.git";
$file_url = implode("/", $parts);
$git_root = realpath("$git_prefix/$owner/pages.git");
if (!is_dir($git_root)) {
error(404, "this user/organization does not have codeberg pages");
if (substr($git_root, 0, strlen($git_prefix)) !== $git_prefix) {
send_response(404, "this user/organization does not have codeberg pages");
}
if (end($parts) === '') {
array_shift($parts);
}
if (sizeof($parts) === 0 || strpos(end($parts), ".") === false) {
$h = "Location: https://" . $_SERVER["HTTP_HOST"] . $_SERVER["REQUEST_URI"];
if (substr($h, -1) != "/") {
$h .= "/";
}
$h .= "index.html";
header($h);
exit();
}
$file_url = implode("/", $parts);
$command = "sh -c \"cd '$git_root' && /usr/bin/git show 'master:$file_url'\"";
## We are executing command twice (first for error-checking, then for actual raw output to stream),
## We are executing command twice (first for send_response-checking, then for actual raw output to stream),
## which seems wasteful, but it seems exec+echo cannot do raw binary output? Is this true?
exec($command, $output, $retval);
if ($retval != 0) {
error(404 , "no such file in repo: '$file_url'");
send_response(404 , "no such file in repo: '" . htmlspecialchars($file_url) . "'");
}
$mime_types = array(
"svg" => "image/svg+xml",
"png" => "image/png",
"jpg" => "image/jpeg",
"jpeg" => "image/jpeg",
"gif" => "image/gif",
"js" => "application/javascript",
"html" => "text/html",
"css" => "text/css",
"ico" => "image/x-icon"
);
$ext = pathinfo($file_url, PATHINFO_EXTENSION);
$ext = strtolower($ext);
if ($ext == "svg") {
header("Content-Type: image/svg+xml");
} elseif ($ext == "jpg") {
header("Content-Type: image/jpeg");
} elseif ($ext == "png") {
header("Content-Type: image/png");
} elseif ($ext == "gif") {
header("Content-Type: image/gif");
} elseif ($ext == "js") {
header("Content-Type: application/javascript");
} elseif ($ext == "css") {
header("Content-Type: text/css");
if (array_key_exists($ext, $mime_types)) {
$mime_type = $mime_types[$ext];
} else {
$mime_type = "text/plain";
}
header("Content-Type: " . $mime_type);
## If we could directly implode+echo raw output from above, we wouldn't need to execute command twice:
passthru($command);