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https://github.com/Rouji/single_php_filehost.git
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initial commit
This commit is contained in:
Rj48
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a6202ec155
1
.gitignore
vendored
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1
.gitignore
vendored
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files/*
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8
.htaccess
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8
.htaccess
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<IfModule mod_rewrite.c>
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RewriteEngine On
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RewriteBase /
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RewriteCond %{REQUEST_FILENAME} !-d
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RewriteCond %{REQUEST_FILENAME} !-f
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RewriteCond %{ENV:REDIRECT_STATUS} ^$
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RewriteRule ^(.*)$ files/$1
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</IfModule>
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244
index.php
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244
index.php
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<?php
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////////////////////////////////////////////////////////////////////////////////
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// global config
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////////////////////////////////////////////////////////////////////////////////
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$MAX_FILESIZE=512; //max. filesize in MB
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$MAX_FILEAGE=180; //max. age of files in days
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$MIN_FILEAGE=31; //min. age of files in days
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$DECAY_EXP=5; //high values favour smaller files (must be uneven)
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$UPLOAD_TIMEOUT=5*60; //max. time an upload can take before this times out
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$ID_LENGTH=6; //length of the random file ID
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$STORE_PATH="files/"; //directory to store uploaded files in
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$DOWNLOAD_URL="%s"; //%s = placeholder for filename
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$HTTP_PROTO="https"; //protocol to use in links
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//TODO: do something with this address,
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//but in a way, that doesn't get it spammed by bots
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$ADMIN_EMAIL="complaintsgo@here.com"; //address for inquiries
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////////////////////////////////////////////////////////////////////////////////
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// set php parameters
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//
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// NOTE: you also have to set "upload_max_filesize" and "post_max_size" manually
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// in your php.ini. this is only here to limit things, should the webserver
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// config allow even higher values.
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//
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// //TODO: check the currently set values and throw a warning, if they're too
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// low?
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////////////////////////////////////////////////////////////////////////////////
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ini_set('upload_max_filesize', $MAX_FILESIZE."M");
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ini_set('post_max_size', $MAX_FILESIZE."M");
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ini_set('max_input_time', $UPLOAD_TIMEOUT);
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ini_set('max_execution_time', $UPLOAD_TIMEOUT);
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////////////////////////////////////////////////////////////////////////////////
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// decide what to do, based on POST parameters etc.
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////////////////////////////////////////////////////////////////////////////////
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if (isset($_FILES["file"]["name"]) && //file was uploaded, store it
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isset($_FILES["file"]["tmp_name"]) &&
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is_uploaded_file($_FILES["file"]["tmp_name"]))
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{
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$formatted = isset($_GET["formatted"]) || isset($_POST["formatted"]);
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storeFile($_FILES["file"]["name"],
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$_FILES["file"]["tmp_name"],
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$formatted);
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}
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else if (isset($argv[1]) && //file was called from cmd, to purge old files
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$argv[1] === 'purge')
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{
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purgeFiles();
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}
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else
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{
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//nothing special going on, print info text
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printInfo();
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}
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////////////////////////////////////////////////////////////////////////////////
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// generate a random string of characters with given length
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////////////////////////////////////////////////////////////////////////////////
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function rndStr($len)
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{
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$chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_';
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$maxIdx = strlen($chars) - 1;
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$out = '';
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while ($len--)
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{
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$out .= $chars[mt_rand(0,$maxIdx)];
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}
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return $out;
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}
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////////////////////////////////////////////////////////////////////////////////
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// store an uploaded file, given its name and temporary path, (e.g. values
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// straight out of $_FILES)
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// files are stored wit a randomised name, but with their original extension
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//
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// $name: original filename
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// $tmpFile: temporary path of uploaded file
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// $formatted: set to true to display formatted message instead of bare link
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////////////////////////////////////////////////////////////////////////////////
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function storeFile($name, $tmpFile, $formatted = false)
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{
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global $STORE_PATH;
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global $ID_LENGTH;
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global $HTTP_PROTO;
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global $DOWNLOAD_URL;
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//create folder, if it doesn't exist
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if (!file_exists($STORE_PATH))
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{
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mkdir($STORE_PATH, 0750, true); //TODO: error handling
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}
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$ext = pathinfo($name, PATHINFO_EXTENSION);
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$id = rndStr($ID_LENGTH);
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$basename = $id . '.' . $ext;
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$target_file = $STORE_PATH . $basename;
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$res = move_uploaded_file($tmpFile, $target_file);
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if ($res)
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{
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//print the download link of the file
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$url = sprintf("%s://%s/".$DOWNLOAD_URL,
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$HTTP_PROTO,
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$_SERVER["SERVER_NAME"],
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$basename);
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if ($formatted)
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{
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printf("<pre>Access your file here:\n<a href=\"%s\">%s</a></pre>",
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$url,$url);
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}
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else
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{
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printf($url);
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}
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}
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else
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{
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//TODO: proper error handling
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printf("An error occurred while uploading file.");
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}
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}
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//////////////////////////////
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// purge all files older than their retention period allows.
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//////////////////////////////
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function purgeFiles()
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{
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global $STORE_PATH;
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global $MAX_FILEAGE;
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global $MAX_FILESIZE;
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global $MIN_FILEAGE;
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global $DECAY_EXP;
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$numDel = 0; //number of deleted files
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$totalSize = 0; //total size of deleted files
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//for each stored file
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foreach (scandir($STORE_PATH) as $file)
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{
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//skip virtual . and .. files
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if ($file == '.' ||
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$file == '..')
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{
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continue;
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}
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$file = $STORE_PATH . $file;
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$fileSize = filesize($file) / (1000*1000); //size in MB
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$fileAge = (time()-filemtime($file)) / (60*60*24); //age in days
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//keep all files below the min age
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if ($fileAge < $MIN_FILEAGE)
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{
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continue;
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}
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//calculate the maximum age, in days, for this file
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//minage + (maxage-minage) * (1-(size/maxsize))^exp;
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$fileMaxAge = $MIN_FILEAGE +
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($MAX_FILEAGE - $MIN_FILEAGE) *
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pow(1-($fileSize/$MAX_FILESIZE),$DECAY_EXP);
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//delete if older
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if ($fileAge > $MIN_FILEAGE)
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{
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unlink($file);
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printf("deleted \"%s\", %d MB, %d days old\n",
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$file,
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$fileSize,
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$fileAge);
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$numDel += 1;
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$totalSize += $fileSize;
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}
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}
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printf("Purge finished. Deleted %d files totalling %d MB\n",
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$numDel,
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$totalSize);
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}
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//////////////////////////////
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// print a plaintext info page, explaining what this script does and how to
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// use it, how to upload, etc.
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// essentially the homepage
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//////////////////////////////
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function printInfo()
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{
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global $ADMIN_EMAIL;
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global $HTTP_PROTO; global $MAX_FILEAGE;
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global $MAX_FILESIZE;
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global $MIN_FILEAGE;
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global $DECAY_EXP;
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$url = $HTTP_PROTO."://".$_SERVER["HTTP_HOST"].$_SERVER['REQUEST_URI'];
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echo <<<EOT
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<html>
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<head></head>
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<body>
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<pre>
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========== How To Upload ==========
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You can upload files to this site via a simple HTTP POST,
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e.g. using curl:
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curl -F "file=@/path/to/your/file.jpg" $url
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Or by choosing a file and clicking "Upload" below:
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</pre>
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<form id="frm" action="" method="post"
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enctype="multipart/form-data">
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<input type="file" name="file" id="file" />
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<input type="hidden" name="formatted" value="true" />
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<input type="submit" value="Upload"/>
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</form>
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<pre>
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(Hint: If you're lucky, your browser may support drag-
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and-drop onto the file selection input.)
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========== File Sizes etc. ==========
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The maximum allowed file size is $MAX_FILESIZE MB.
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Files are kept for a minimum of $MIN_FILEAGE, and a maximum
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of $MAX_FILEAGE Days.
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How long a file is kept, depends on its size. Larger
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files are deleted earlier than small ones. This relation
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is non-linear and skewed in favour of small files.
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The exact formula for determining the maximum age for
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a file is:
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MIN_AGE + (MAX_AGE - MIN_AGE) * (1-(FILE_SIZE/MAX_AGE))^$DECAY_EXP
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</pre>
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</body>
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</html>
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EOT;
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}
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?>
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