cuqmbr/single_php_filehost
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optionally detect file extension by file contents

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mainly useful for the netcat -> http post bridge thing
This commit is contained in:
Rouji 2021-05-22 00:46:49 +02:00
parent 0304c069fd
commit 3d3ccec162
1 changed files with 32 additions and 6 deletions
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38
index.php
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@ -12,6 +12,7 @@ $DOWNLOAD_PATH="%s"; //the path part of the download url. %s = placeholde
$HTTP_PROTO="https"; //protocol to use in links $HTTP_PROTO="https"; //protocol to use in links
$MAX_EXT_LEN=7; //max. length for file extensions $MAX_EXT_LEN=7; //max. length for file extensions
$EXTETNAL_HOOK=null; $EXTETNAL_HOOK=null;
$AUTO_FILE_EXT=false;
$ADMIN_EMAIL="admin@example.com"; //address for inquiries $ADMIN_EMAIL="admin@example.com"; //address for inquiries
@ -52,10 +53,8 @@ function warn_config_value($ini_name, $var_name, $var_val)
} }
//extract extension from a path (does not include the dot) //extract extension from a path (does not include the dot)
function get_ext($path) function ext_by_path($path)
{ {
global $MAX_EXT_LEN;
$ext = pathinfo($path, PATHINFO_EXTENSION); $ext = pathinfo($path, PATHINFO_EXTENSION);
//special handling of .tar.* archives //special handling of .tar.* archives
$ext2 = pathinfo(substr($path,0,-(strlen($ext)+1)), PATHINFO_EXTENSION); $ext2 = pathinfo(substr($path,0,-(strlen($ext)+1)), PATHINFO_EXTENSION);
@ -63,11 +62,31 @@ function get_ext($path)
{ {
$ext = $ext2.'.'.$ext; $ext = $ext2.'.'.$ext;
} }
//trim extension to max. 7 chars
$ext = substr($ext, 0, $MAX_EXT_LEN);
return $ext; return $ext;
} }
function ext_by_finfo($path)
{
$finfo = finfo_open(FILEINFO_EXTENSION);
$finfo_ext = finfo_file($finfo, $path);
finfo_close($finfo);
if ($finfo_ext != "???")
{
return explode("/", $finfo_ext, 2)[0];
}
else
{
$finfo = finfo_open();
$finfo_info = finfo_file($finfo, $path);
finfo_close($finfo);
if (strstr($finfo_info, "text") !== false)
{
return "txt";
}
}
return "";
}
// store an uploaded file, given its name and temporary path (e.g. values straight out of $_FILES) // store an uploaded file, given its name and temporary path (e.g. values straight out of $_FILES)
// files are stored wit a randomised name, but with their original extension // files are stored wit a randomised name, but with their original extension
// //
@ -83,6 +102,8 @@ function store_file($name, $tmpfile, $formatted = false)
global $MAX_FILESIZE; global $MAX_FILESIZE;
global $EXTETNAL_HOOK; global $EXTETNAL_HOOK;
global $LOG_PATH; global $LOG_PATH;
global $MAX_EXT_LEN;
global $AUTO_FILE_EXT;
//create folder, if it doesn't exist //create folder, if it doesn't exist
if (!file_exists($STORE_PATH)) if (!file_exists($STORE_PATH))
@ -105,7 +126,12 @@ function store_file($name, $tmpfile, $formatted = false)
return; return;
} }
$ext = get_ext($name); $ext = ext_by_path($name);
if (empty($ext) && $AUTO_FILE_EXT)
{
$ext = ext_by_finfo($tmpfile);
}
$ext = substr($ext, 0, $MAX_EXT_LEN);
$tries_per_len=3; //try random names a few times before upping the length $tries_per_len=3; //try random names a few times before upping the length
for ($len = $ID_LENGTH; ; ++$len) for ($len = $ID_LENGTH; ; ++$len)
{ {