X-Git-Url: https://git.p6c8.net/jirafeau.git/blobdiff_plain/cbef2b93dfeb51484956c960d58af8c4557c25f5..8adcdf2e61aa2746235d99202ad07b59d0198b04:/lib/functions.php

diff --git a/lib/functions.php b/lib/functions.php
old mode 100644
new mode 100755
index 48bdefd..223fd8e
--- a/lib/functions.php
+++ b/lib/functions.php
@@ -18,61 +18,174 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+/**
+ * Transform a string in a path by seperating each letters by a '/'.
+  * @return path finishing with a '/'
+ */
+function
+s2p ($s)
+{
+    $p = '';
+    for ($i = 0; $i < strlen ($s); $i++)
+        $p .= $s{$i} . '/';
+    return $p;
+}
+
+/**
+ * Convert base 16 to base 64
+ * @returns A string based on 64 characters (0-9, a-z, A-Z, "-" and "_")
+ */
+function
+base_16_to_64 ($num)
+{
+    $m = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_';
+    $hex2bin = array ('0000', # 0
+                      '0001', # 1
+                      '0010', # 2
+                      '0011', # 3
+                      '0100', # 4
+                      '0101', # 5
+                      '0110', # 6
+                      '0111', # 7
+                      '1000', # 8
+                      '1001', # 9
+                      '1010', # a
+                      '1011', # b
+                      '1100', # c
+                      '1101', # d
+                      '1110', # e
+                      '1111'); # f
+    $o = '';    
+    $b = '';
+    $i = 0;
+    # Convert long hex string to bin.
+    $size = strlen ($num);
+
+    $b .= $hex2bin{hexdec ($num{$i})};
+    # Convert long bin to base 64.
+    $size *= 4;
+    for ($i = $size - 6; $i >= 0; $i -= 6)
+        $o = $m{bindec (substr ($b, $i, 6))} . $o;
+    # Some few bits remaining ?
+    if ($i < 0 && $i > -6)
+        $o = $m{bindec (substr ($b, 0, $i + 6))} . $o;
+    return $o;
+}
+
+/**
+  * Generate a random code.
+  * @param $l code length
+  * @return  random code.
+  */
+function
+jirafeau_gen_random ($l)
+{
+    if ($l <= 0)
+        return 42;
+
+    $code="";
+    for ($i = 0; $i < $l; $i++)
+        $code .= dechex (rand (0, 15));
+
+    return $code;
+}
+
+function
+jirafeau_human_size ($octets)
+{
+    $u = array ('B', 'KB', 'MB', 'GB', 'TB');
+    $o = max ($octets, 0);
+    $p = min (floor (($o ? log ($o) : 0) / log (1024)), count ($u) - 1);
+    $o /= pow (1024, $p);
+    return round ($o, 1) . $u[$p];
+} 
+
+function
+jirafeau_clean_rm_link ($link)
+{
+    $p = s2p ("$link");
+    if (file_exists (VAR_LINKS . $p . $link))
+        unlink (VAR_LINKS . $p . $link);
+    $parse = VAR_LINKS . $p;
+    $scan = array();
+    while (file_exists ($parse)
+           && ($scan = scandir ($parse))
+           && count ($scan) == 2 // '.' and '..' folders => empty.
+           && basename ($parse) != basename (VAR_LINKS)) 
+    {
+        rmdir ($parse);
+        $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
+    }
+}
+
+function
+jirafeau_clean_rm_file ($md5)
+{
+    $p = s2p ("$md5");
+    if (file_exists (VAR_FILES . $p . $md5))
+        unlink (VAR_FILES . $p . $md5);
+    if (file_exists (VAR_FILES . $p . $md5 . '_count'))
+        unlink (VAR_FILES . $p . $md5 . '_count');
+    $parse = VAR_FILES . $p;
+    $scan = array();
+    while (file_exists ($parse)
+           && ($scan = scandir ($parse))
+           && count ($scan) == 2 // '.' and '..' folders => empty.
+           && basename ($parse) != basename (VAR_FILES)) 
+    {
+        rmdir ($parse);
+        $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
+    }
+}
+
 /**
  * transforms a php.ini string representing a value in an integer
  * @param $value the value from php.ini
  * @returns an integer for this value
  */
-function jirafeau_ini_to_bytes($value) {
-  $modifier = substr($value, -1);
-  $bytes = substr($value, 0, -1);
-  switch(strtoupper($modifier)) {
-  case 'P':
-    $bytes *= 1024;
-  case 'T':
-    $bytes *= 1024;
-  case 'G':
-    $bytes *= 1024;
-  case 'M':
-    $bytes *= 1024;
-  case 'K':
-    $bytes *= 1024;
-  default:
-    break;
-  }
-  return $bytes;
+function jirafeau_ini_to_bytes ($value)
+{
+    $modifier = substr ($value, -1);
+    $bytes = substr ($value, 0, -1);
+    switch (strtoupper ($modifier))
+    {
+    case 'P':
+        $bytes *= 1024;
+    case 'T':
+        $bytes *= 1024;
+    case 'G':
+        $bytes *= 1024;
+    case 'M':
+        $bytes *= 1024;
+    case 'K':
+        $bytes *= 1024;
+    default:
+        break;
+    }
+    return $bytes;
 }
 
 /**
  * gets the maximum upload size according to php.ini
- * @returns the maximum upload size
+ * @returns the maximum upload size in bytes
  */
-function jirafeau_get_max_upload_size() {
-  return min(jirafeau_ini_to_bytes(ini_get('post_max_size')), jirafeau_ini_to_bytes(ini_get('upload_max_filesize')));
+function
+jirafeau_get_max_upload_size_bytes ()
+{
+    return min (jirafeau_ini_to_bytes (ini_get ('post_max_size')),
+                jirafeau_ini_to_bytes (ini_get ('upload_max_filesize')));
 }
 
 /**
- * detects if a given filename is present in a directory and find an alternate filename
- * @param $name the initial filename
- * @param $dir the directory to explore (finishing with a '/')
- * @returns an alternate filename, possibly the initial filename
+ * gets the maximum upload size according to php.ini
+ * @returns the maximum upload size string
  */
-function jirafeau_detect_collision($name, $dir) {
-  if(!file_exists($dir . $name)) {
-    return $name;
-  }
-
-  $dot = strpos($name, '.');
-  $dot = ($dot === false) ? strlen($name) : $dot;
-  $first = substr($name, 0, $dot);
-  $second = substr($name, $dot);
-  $i = 1;
-  do {
-    $new_name = $first . '-' . $i . $second;
-    $i++;
-  } while(file_exists($dir . $new_name));
-
-  return $new_name;
+function
+jirafeau_get_max_upload_size ()
+{
+    return jirafeau_human_size(
+            min (jirafeau_ini_to_bytes (ini_get ('post_max_size')),
+                 jirafeau_ini_to_bytes (ini_get ('upload_max_filesize'))));
 }
 
 /**
@@ -80,28 +193,110 @@ function jirafeau_detect_collision($name, $dir) {
  * @param $code the error code
  * @returns a string explaining the error
  */
-function jirafeau_upload_errstr($code) {
-  switch($code) {
-  case UPLOAD_ERR_INI_SIZE:
-  case UPLOAD_ERR_FORM_SIZE:
-    return _('Your file exceeds the maximum authorized file size.');
-    break;
+function
+jirafeau_upload_errstr ($code)
+{
+    switch ($code)
+    {
+    case UPLOAD_ERR_INI_SIZE:
+    case UPLOAD_ERR_FORM_SIZE:
+        return t('Your file exceeds the maximum authorized file size. ');
+        break;
 
-  case UPLOAD_ERR_PARTIAL:
-  case UPLOAD_ERR_NO_FILE:
-    return _('Your file was not uploaded correctly. You may succeed in retrying.');
-    break;
+    case UPLOAD_ERR_PARTIAL:
+    case UPLOAD_ERR_NO_FILE:
+        return
+            t
+            ('Your file was not uploaded correctly. You may succeed in retrying. ');
+        break;
 
-  case UPLOAD_ERR_NO_TMP_DIR:
-  case UPLOAD_ERR_CANT_WRITE:
-  case UPLOAD_ERR_EXTENSION:
-    return _('Internal error. You may not succeed in retrying.');
-    break;
+    case UPLOAD_ERR_NO_TMP_DIR:
+    case UPLOAD_ERR_CANT_WRITE:
+    case UPLOAD_ERR_EXTENSION:
+        return t('Internal error. You may not succeed in retrying. ');
+        break;
 
-  default:
-    break;
-  }
-  return _('Unknown error.');
+    default:
+        break;
+    }
+    return t('Unknown error. ');
+}
+
+/** Remove link and it's file
+ * @param $link the link's name (hash)
+ */
+
+function
+jirafeau_delete_link ($link)
+{
+    $l = jirafeau_get_link ($link);
+    if (!count ($l))
+        return;
+
+    jirafeau_clean_rm_link ($link);
+
+    $md5 = $l['md5'];
+    $p = s2p ("$md5");
+
+    $counter = 1;
+    if (file_exists (VAR_FILES . $p . $md5. '_count'))
+    {
+        $content = file (VAR_FILES . $p . $md5. '_count');
+        $counter = trim ($content[0]);
+    }
+    $counter--;
+
+    if ($counter >= 1)
+    {
+        $handle = fopen (VAR_FILES . $p . $md5. '_count', 'w');
+        fwrite ($handle, $counter);
+        fclose ($handle);
+    }
+
+    if ($counter == 0)
+        jirafeau_clean_rm_file ($md5);
+}
+
+/**
+ * Delete a file and it's links.
+ */
+function
+jirafeau_delete_file ($md5)
+{
+    $count = 0;
+    /* Get all links files. */
+    $stack = array (VAR_LINKS);
+    while (($d = array_shift ($stack)) && $d != NULL)
+    {
+        $dir = scandir ($d);
+
+        foreach ($dir as $node)
+        {
+            if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
+                preg_match ('/\.tmp/i', "$node"))
+                continue;
+            
+            if (is_dir ($d . $node))
+            {
+                /* Push new found directory. */
+                $stack[] = $d . $node . '/';
+            }
+            elseif (is_file ($d . $node))
+            {
+                /* Read link informations. */
+                $l = jirafeau_get_link (basename ($node));
+                if (!count ($l))
+                    continue;
+                if ($l['md5'] == $md5)
+                {
+                    $count++;
+                    jirafeau_delete_link ($node);
+                }   
+            }
+        }
+    }
+    jirafeau_clean_rm_file ($md5);
+    return $count;
 }
 
 /**
@@ -110,81 +305,113 @@ function jirafeau_upload_errstr($code) {
  * @param $one_time_download is the file a one time download ?
  * @param $key if not empty, protect the file with this key
  * @param $time the time of validity of the file
- * @param $cfg the current configuration
  * @param $ip uploader's ip
  * @returns an array containing some information
  *   'error' => information on possible errors
  *   'link' => the link name of the uploaded file
+ *   'delete_link' => the link code to delete file
  */
-function jirafeau_upload($file, $one_time_download, $key, $time, $cfg, $ip) {
-  if(empty($file['tmp_name']) || !is_uploaded_file($file['tmp_name'])) {
-    return(array('error' => array('has_error' => true, 'why' => jirafeau_upload_errstr($file['error'])), 'link' => ''));
-  }
-
-  /* array representing no error */
-  $noerr = array('has_error' => false, 'why' => '');
-
-  /* file informations */
-  $md5 = md5_file($file['tmp_name']);
-  $name = trim($file['name']);
-  $mime_type = $file['type'];
-  $size = $file['size'];
-
-  /* does file already exist ? */
-  $rc = false;
-  if(file_exists(VAR_FILES . $md5)) {
-    $rc = unlink($file['tmp_name']);
-  }
-  elseif(move_uploaded_file($file['tmp_name'], VAR_FILES . $md5)) {
-    $rc = true;
-  }
-  if(!$rc)
-  {
-    return(array(
-      'error' => array(
-        'has_error' => true,
-        'why' => _('Internal error during file creation.')),
-      'link' => '')
-    );
-  }
-
-  /* increment or create count file */
-  $counter=0;
-  if(file_exists(VAR_FILES . $md5 . '_count')) {
-    $content = file(VAR_FILES . $md5 . '_count');
-    $counter = trim($content[0]);
-  }
-  $counter++;
-  $handle = fopen(VAR_FILES . $md5 . '_count', 'w');
-  fwrite($handle, $counter);
-  fclose($handle);
-
-  /* create link file */
-  $link_tmp_name = VAR_LINKS . $md5 . rand(0, 10000) . '.tmp';
-  $handle = fopen($link_tmp_name, 'w');
-  fwrite($handle, $name . NL . $mime_type . NL . $size . NL . $key . NL . $time . NL . $md5 . NL . ($one_time_download ? 'O' : 'R') . NL . date('U') . NL . $ip . NL);
-  fclose($handle);
-  $md5_link = md5_file($link_tmp_name);
-  if(!rename($link_tmp_name, VAR_LINKS . $md5_link)) {
-    if ($counter > 1) {
-      $counter--;
-      $handle = fopen(VAR_FILES . $md5 . '_count', 'w');
-      fwrite($handle, $counter);
-      fclose($handle);
-    }
-    else {
-      unlink($link_tmp_name);
-      unlink(VAR_FILE . $md5 . '_count');
-      unlink(VAR_FILE . $md5);
-    }
-    return(array(
-      'error' => array(
-        'has_error' => true,
-        'why' => _('Internal error during file creation.')),
-      'link' => '')
-    );
-  }
-  return(array('error' => $noerr, 'link' => $md5_link));
+function
+jirafeau_upload ($file, $one_time_download, $key, $time, $ip)
+{
+    if (empty ($file['tmp_name']) || !is_uploaded_file ($file['tmp_name']))
+    {
+        return (array(
+                 'error' =>
+                   array ('has_error' => true,
+                          'why' => jirafeau_upload_errstr ($file['error'])),
+                 'link' => '',
+                 'delete_link' => ''));
+    }
+
+    /* array representing no error */
+    $noerr = array ('has_error' => false, 'why' => '');
+
+    /* file informations */
+    $md5 = md5_file ($file['tmp_name']);
+    $name = str_replace (NL, '', trim ($file['name']));
+    $mime_type = $file['type'];
+    $size = $file['size'];
+
+    /* does file already exist ? */
+    $rc = false;
+    $p = s2p ("$md5");
+    if (file_exists (VAR_FILES . $p .  $md5))
+    {
+        $rc = unlink ($file['tmp_name']);
+    }
+    elseif ((file_exists (VAR_FILES . $p) || @mkdir (VAR_FILES . $p, 0755, true))
+            && move_uploaded_file ($file['tmp_name'], VAR_FILES . $p . $md5))
+    {
+        $rc = true;
+    }
+    if (!$rc)
+    {
+        return (array(
+                 'error' =>
+                   array ('has_error' => true,
+                          'why' => t('Internal error during file creation.')),
+                 'link' =>'',
+                 'delete_link' => ''));
+    }
+
+    /* Increment or create count file. */
+    $counter = 0;
+    if (file_exists (VAR_FILES . $p . $md5 . '_count'))
+    {
+        $content = file (VAR_FILES . $p . $md5. '_count');
+        $counter = trim ($content[0]);
+    }
+    $counter++;
+    $handle = fopen (VAR_FILES . $p . $md5. '_count', 'w');
+    fwrite ($handle, $counter);
+    fclose ($handle);
+
+    /* Create delete code. */
+    $delete_link_code = jirafeau_gen_random (8);
+
+    /* md5 password or empty */
+    $password = '';
+    if (!empty ($key))
+        $password = md5 ($key);
+
+    /* create link file */
+    $link_tmp_name =  VAR_LINKS . $md5 . rand (0, 10000) . ' .tmp';
+    $handle = fopen ($link_tmp_name, 'w');
+    fwrite ($handle,
+            $name . NL. $mime_type . NL. $size . NL. $password . NL. $time .
+            NL . $md5. NL . ($one_time_download ? 'O' : 'R') . NL . date ('U') .
+            NL . $ip . NL. $delete_link_code . NL);
+    fclose ($handle);
+    $md5_link = base_16_to_64 (md5_file ($link_tmp_name));
+    $l = s2p ("$md5_link");
+    if (!@mkdir (VAR_LINKS . $l, 0755, true) ||
+        !rename ($link_tmp_name,  VAR_LINKS . $l . $md5_link))
+    {
+        if (file_exists ($link_tmp_name))
+            unlink ($link_tmp_name);
+        
+        $counter--;
+        if ($counter >= 1)
+        {
+            $handle = fopen (VAR_FILES . $p . $md5. '_count', 'w');
+            fwrite ($handle, $counter);
+            fclose ($handle);
+        }
+        else
+        {
+            jirafeau_clean_rm_file ($md5_link);
+        }
+        return (array(
+                 'error' =>
+                   array ('has_error' => true,
+                          'why' => t('Internal error during file creation. ')),
+                 'link' =>'',
+                 'delete_link' => ''));
+    }
+   return (array ('error' => $noerr,
+                  'link' => $md5_link,
+                  'delete_link' => $delete_link_code));
 }
 
 /**
@@ -192,17 +419,19 @@ function jirafeau_upload($file, $one_time_download, $key, $time, $cfg, $ip) {
  * @param $mime the mime type
  * @returns a boolean telling if a mime type is viewable
  */
-function jirafeau_is_viewable($mime) {
-  if(!empty($mime)) {
-    // actually, verify if mime-type is an image or a text
-    $viewable = array('image', 'text');
-    $decomposed = explode('/', $mime);
-    return in_array($decomposed[0], $viewable);
-  }
-  return false;
+function
+jirafeau_is_viewable ($mime)
+{
+    if (!empty ($mime))
+    {
+        /* Actually, verify if mime-type is an image or a text. */
+        $viewable = array ('image', 'text');
+        $decomposed = explode ('/', $mime);
+        return in_array ($decomposed[0], $viewable);
+    }
+    return false;
 }
 
-
 // Error handling functions.
 //! Global array that contains all registered errors.
 $error_list = array ();
@@ -212,16 +441,20 @@ $error_list = array ();
  * @param $title the error's title
  * @param $description is a human-friendly description of the problem.
  */
-function add_error ($title, $description) {
+function
+add_error ($title, $description)
+{
     global $error_list;
-    $error_list[] = '<p>' . $title . '<br />' . $description . '</p>';
+    $error_list[] = '<p>' . $title. '<br />' . $description. '</p>';
 }
 
 /**
  * Informs whether any error has been registered yet.
  * @return true if there are errors.
  */
-function has_error () {
+function
+has_error ()
+{
     global $error_list;
     return !empty ($error_list);
 }
@@ -229,15 +462,770 @@ function has_error () {
 /**
  * Displays all the errors.
  */
-function show_errors () {
-    if (has_error ()) {
+function
+show_errors ()
+{
+    if (has_error ())
+    {
         global $error_list;
         echo '<div class="error">';
-        foreach ($error_list as $error) {
+        foreach ($error_list as $error)
+        {
             echo $error;
         }
         echo '</div>';
     }
 }
 
+function check_errors ()
+{
+    if (file_exists (JIRAFEAU_ROOT . 'install.php')
+        && !file_exists (JIRAFEAU_ROOT . 'lib/config.local.php'))
+    {
+        header('Location: install.php'); 
+        exit;
+    }
+
+    /* check if the destination dirs are writable */
+    $writable = is_writable (VAR_FILES) && is_writable (VAR_LINKS);
+
+    /* Checking for errors. */
+    if (!is_writable (VAR_FILES))
+        add_error (t('The file directory is not writable!'), VAR_FILES);
+
+    if (!is_writable (VAR_LINKS))
+        add_error (t('The link directory is not writable!'), VAR_LINKS);
+    
+    if (!is_writable (VAR_ASYNC))
+        add_error (t('The async directory is not writable!'), VAR_ASYNC);
+
+     if (!is_writable (VAR_BLOCK))
+        add_error (t('The block directory is not writable!'), VAR_BLOCK);
+
+   /* Check if the install.php script is still in the directory. */
+    if (file_exists (JIRAFEAU_ROOT . 'install.php'))
+        add_error (t('Installer script still present'),
+             t('Please make sure to delete the installer script ' .
+               '"install.php" before continuing.'));
+}
+
+/**
+ * Read link informations
+ * @return array containing informations.
+ */
+function
+jirafeau_get_link ($hash)
+{
+    $out = array ();
+    $link = VAR_LINKS . s2p ("$hash") . $hash;
+
+    if (!file_exists ($link))
+        return $out;
+    
+    $c = file ($link);
+    $out['file_name'] = trim ($c[0]);
+    $out['mime_type'] = trim ($c[1]);
+    $out['file_size'] = trim ($c[2]);
+    $out['key'] = trim ($c[3], NL);
+    $out['time'] = trim ($c[4]);
+    $out['md5'] = trim ($c[5]);
+    $out['onetime'] = trim ($c[6]);
+    $out['upload_date'] = trim ($c[7]);
+    $out['ip'] = trim ($c[8]);
+    $out['link_code'] = trim ($c[9]);
+    
+    return $out;
+}
+
+/**
+ * List files in admin interface.
+ */
+function
+jirafeau_admin_list ($name, $file_hash, $link_hash)
+{
+    echo '<fieldset><legend>';
+    if (!empty ($name))
+        echo t('Filename') . ": $name ";
+    if (!empty ($file_hash))
+        echo t('file') . ": $file_hash ";
+    if (!empty ($link_hash))
+        echo t('link') . ": $link_hash ";
+    if (empty ($name) && empty ($file_hash) && empty ($link_hash))
+        echo t('List all files');
+    echo '</legend>';
+    echo '<table>';
+    echo '<tr>';
+    echo '<td>' . t('Filename') . '</td>';
+    echo '<td>' . t('Type') . '</td>';
+    echo '<td>' . t('Size') . '</td>';
+    echo '<td>' . t('Expire') . '</td>';
+    echo '<td>' . t('Onetime') . '</td>';
+    echo '<td>' . t('Upload date') . '</td>';
+    echo '<td>' . t('Origin') . '</td>';
+    echo '<td>' . t('Action') . '</td>';
+    echo '</tr>';
+
+    /* Get all links files. */
+    $stack = array (VAR_LINKS);
+    while (($d = array_shift ($stack)) && $d != NULL)
+    {
+        $dir = scandir ($d);
+        foreach ($dir as $node)
+        {
+            if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
+                preg_match ('/\.tmp/i', "$node"))
+                continue;
+            if (is_dir ($d . $node))
+            {
+                /* Push new found directory. */
+                $stack[] = $d . $node . '/';
+            }
+            elseif (is_file ($d . $node))
+            {
+                /* Read link informations. */
+                $l = jirafeau_get_link ($node);
+                if (!count ($l))
+                    continue;
+
+                /* Filter. */
+                if (!empty ($name) && !preg_match ("/$name/i", $l['file_name']))
+                    continue;
+                if (!empty ($file_hash) && $file_hash != $l['md5'])
+                    continue;
+                if (!empty ($link_hash) && $link_hash != $node)
+                    continue;
+                /* Print link informations. */
+                echo '<tr>';
+                echo '<td>' .
+                '<form action = "admin.php" method = "post">' .
+                '<input type = "hidden" name = "action" value = "download"/>' .
+                '<input type = "hidden" name = "link" value = "' . $node . '"/>' .
+                '<input type = "submit" value = "' . $l['file_name'] . '" />' .
+                '</form>';
+                echo '</td>';
+                echo '<td>' . $l['mime_type'] . '</td>';
+                echo '<td>' . jirafeau_human_size ($l['file_size']) . '</td>';
+                echo '<td>' . ($l['time'] == -1 ? '' : strftime ('%c', $l['time'])) .
+                     '</td>';
+                echo '<td>' . $l['onetime'] . '</td>';
+                echo '<td>' . strftime ('%c', $l['upload_date']) . '</td>';
+                echo '<td>' . $l['ip'] . '</td>';
+                echo '<td>' .
+                '<form action = "admin.php" method = "post">' .
+                '<input type = "hidden" name = "action" value = "delete_link"/>' .
+                '<input type = "hidden" name = "link" value = "' . $node . '"/>' .
+                '<input type = "submit" value = "' . t('Del link') . '" />' .
+                '</form>' .
+                '<form action = "admin.php" method = "post">' .
+                '<input type = "hidden" name = "action" value = "delete_file"/>' .
+                '<input type = "hidden" name = "md5" value = "' . $l['md5'] . '"/>' .
+                '<input type = "submit" value = "' . t('Del file and links') . '" />' .
+                '</form>' .
+                '</td>';
+                echo '</tr>';
+            }
+        }
+    }
+    echo '</table></fieldset>';
+}
+
+/**
+ * Clean expired files.
+ * @return number of cleaned files.
+ */
+function
+jirafeau_admin_clean ()
+{
+    $count = 0;
+    /* Get all links files. */
+    $stack = array (VAR_LINKS);
+    while (($d = array_shift ($stack)) && $d != NULL)
+    {
+        $dir = scandir ($d);
+
+        foreach ($dir as $node)
+        {
+            if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
+                preg_match ('/\.tmp/i', "$node"))
+                continue;
+            
+            if (is_dir ($d . $node))
+            {
+                /* Push new found directory. */
+                $stack[] = $d . $node . '/';
+            }
+            elseif (is_file ($d . $node))
+            {
+                /* Read link informations. */
+                $l = jirafeau_get_link (basename ($node));
+                if (!count ($l))
+                    continue;
+                $p = s2p ($l['md5']);
+                if ($l['time'] > 0 && $l['time'] < time () || // expired
+                    !file_exists (VAR_FILES . $p . $l['md5']) || // invalid
+                    !file_exists (VAR_FILES . $p . $l['md5'] . '_count')) // invalid
+                {
+                    jirafeau_delete_link ($node);
+                    $count++;
+                }
+            }
+        }
+    }
+    return $count;
+}
+
+
+/**
+ * Clean old async transferts.
+ * @return number of cleaned files.
+ */
+function
+jirafeau_admin_clean_async ()
+{
+    $count = 0;
+    /* Get all links files. */
+    $stack = array (VAR_ASYNC);
+    while (($d = array_shift ($stack)) && $d != NULL)
+    {
+        $dir = scandir ($d);
+
+        foreach ($dir as $node)
+        {
+            if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
+                preg_match ('/\.tmp/i', "$node"))
+                continue;
+            
+            if (is_dir ($d . $node))
+            {
+                /* Push new found directory. */
+                $stack[] = $d . $node . '/';
+            }
+            elseif (is_file ($d . $node))
+            {
+                /* Read async informations. */
+                $a = jirafeau_get_async_ref (basename ($node));
+                if (!count ($a))
+                    continue;
+                /* Delete transferts older than 1 hour. */
+                if (date ('U') - $a['last_edited'] > 3600)
+                {
+                    jirafeau_async_delete (basename ($node));
+                    $count++;
+                }
+            }
+        }
+    }
+    return $count;
+}
+/**
+ * Read async transfert informations
+ * @return array containing informations.
+ */
+function
+jirafeau_get_async_ref ($ref)
+{
+    $out = array ();
+    $refinfos = VAR_ASYNC . s2p ("$ref") . "$ref";
+
+    if (!file_exists ($refinfos))
+        return $out;
+    
+    $c = file ($refinfos);
+    $out['file_name'] = trim ($c[0]);
+    $out['mime_type'] = trim ($c[1]);
+    $out['key'] = trim ($c[2], NL);
+    $out['time'] = trim ($c[3]);
+    $out['onetime'] = trim ($c[4]);
+    $out['ip'] = trim ($c[5]);
+    $out['last_edited'] = trim ($c[6]);
+    $out['next_code'] = trim ($c[7]);
+    return $out;
+}
+
+/**
+ * Delete async transfert informations
+  */
+function
+jirafeau_async_delete ($ref)
+{
+    $p = s2p ("$ref");
+    if (file_exists (VAR_ASYNC . $p . $ref))
+        unlink (VAR_ASYNC . $p . $ref);
+    if (file_exists (VAR_ASYNC . $p . $ref . '_data'))
+        unlink (VAR_ASYNC . $p . $ref . '_data');
+    $parse = VAR_ASYNC . $p;
+    $scan = array();
+    while (file_exists ($parse)
+           && ($scan = scandir ($parse))
+           && count ($scan) == 2 // '.' and '..' folders => empty.
+           && basename ($parse) != basename (VAR_ASYNC)) 
+    {
+        rmdir ($parse);
+        $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
+    }
+}
+
+/**
+  * Init a new asynchronous upload.
+  * @param $finename Name of the file to send
+  * @param $one_time One time upload parameter
+  * @param $key eventual password (or blank)
+  * @param $time time limit
+  * @param $ip ip address of the client
+  * @return  a string containing a temporary reference followed by a code or the string "Error"
+  */
+function
+jirafeau_async_init ($filename, $type, $one_time, $key, $time, $ip)
+{
+    $res = 'Error';
+
+    /* Create temporary folder. */
+    $ref;
+    $p;
+    $code = jirafeau_gen_random (4);
+    do
+    {
+        $ref = jirafeau_gen_random (32);
+        $p = VAR_ASYNC . s2p ($ref);
+    } while (file_exists ($p));
+    @mkdir ($p, 0755, true);
+    if (!file_exists ($p))
+    {
+        echo "Error";
+        return;
+    }
+    
+    /* md5 password or empty */
+    $password = '';
+    if (!empty ($key))
+        $password = md5 ($key);
+
+    /* Store informations. */
+    $p .= $ref;
+    $handle = fopen ($p, 'w');
+    fwrite ($handle,
+            str_replace (NL, '', trim ($filename)) . NL .
+            str_replace (NL, '', trim ($type)) . NL . $password . NL .
+            $time . NL . ($one_time ? 'O' : 'R') . NL . $ip . NL .
+            date ('U') . NL . $code . NL);
+    fclose ($handle);
+
+    return $ref . NL . $code ;
+}
+
+/**
+  * Append a piece of file on the asynchronous upload.
+  * @param $ref asynchronous upload reference
+  * @param $file piece of data
+  * @param $code client code for this operation
+  * @return  a string containing a next code to use or the string "Error"
+  */
+function
+jirafeau_async_push ($ref, $data, $code)
+{
+    /* Get async infos. */
+    $a = jirafeau_get_async_ref ($ref);
+    
+    /* Check some errors. */
+    if (count ($a) == 0
+        || $a['next_code'] != "$code"
+        || empty ($data['tmp_name'])
+        || !is_uploaded_file ($data['tmp_name']))
+        return "Error";
+    
+    $p = s2p ($ref);
+
+    /* Concatenate data. */
+    $r = fopen ($data['tmp_name'], 'r');
+    $w = fopen (VAR_ASYNC . $p . $ref . '_data', 'a');
+    while (!feof ($r))
+    {
+        if (fwrite ($w, fread ($r, 1024)) === false)
+        {
+            fclose ($r);
+            fclose ($w);
+            jirafeau_async_delete ($ref);
+            return "Error";
+        }
+    }
+    fclose ($r);
+    fclose ($w);
+    unlink ($data['tmp_name']);
+    
+    /* Update async file. */
+    $code = jirafeau_gen_random (4);
+    $handle = fopen (VAR_ASYNC . $p . $ref, 'w');
+    fwrite ($handle,
+            $a['file_name'] . NL. $a['mime_type'] . NL. $a['key'] . NL .
+            $a['time'] . NL . $a['onetime'] . NL . $a['ip'] . NL .
+            date ('U') . NL . $code . NL);
+    fclose ($handle);
+    return $code;
+}
+
+/**
+  * Finalyze an asynchronous upload.
+  * @param $ref asynchronous upload reference
+  * @param $code client code for this operation
+  * @return  a string containing the download reference followed by a delete code or the string "Error"
+  */
+function
+jirafeau_async_end ($ref, $code)
+{
+    /* Get async infos. */
+    $a = jirafeau_get_async_ref ($ref);
+    if (count ($a) == 0
+        || $a['next_code'] != "$code")
+        return "Error";
+    
+    /* Generate link infos. */
+    $p = VAR_ASYNC . s2p ($ref) . $ref . "_data";
+    if (!file_exists($p))
+        return "Error";
+    $md5 = md5_file ($p);
+    $size = filesize($p);
+    $np = s2p ($md5);
+    $delete_link_code = jirafeau_gen_random (8);
+    
+    /* File already exist ? */ 
+    if (!file_exists (VAR_FILES . $np))
+        @mkdir (VAR_FILES . $np, 0755, true);
+    if (!file_exists (VAR_FILES . $np . $md5))
+        rename ($p, VAR_FILES . $np . $md5);
+    
+    /* Increment or create count file. */
+    $counter = 0;
+    if (file_exists (VAR_FILES . $np . $md5 . '_count'))
+    {
+        $content = file (VAR_FILES . $np . $md5. '_count');
+        $counter = trim ($content[0]);
+    }
+    $counter++;
+    $handle = fopen (VAR_FILES . $np . $md5. '_count', 'w');
+    fwrite ($handle, $counter);
+    fclose ($handle);
+    
+    /* Create link. */
+    $link_tmp_name =  VAR_LINKS . $md5 . rand (0, 10000) . ' .tmp';
+    $handle = fopen ($link_tmp_name, 'w');
+    fwrite ($handle,
+            $a['file_name'] . NL . $a['mime_type'] . NL . $size . NL .
+            $a['key'] . NL . $a['time'] . NL . $md5 . NL . $a['onetime'] . NL .
+            date ('U') . NL . $a['ip'] . NL . $delete_link_code . NL);
+    fclose ($handle);
+    $md5_link = base_16_to_64 (md5_file ($link_tmp_name));
+    $l = s2p ("$md5_link");
+    if (!@mkdir (VAR_LINKS . $l, 0755, true) ||
+        !rename ($link_tmp_name,  VAR_LINKS . $l . $md5_link))
+        echo "Error";
+    
+    /* Clean async upload. */
+    jirafeau_async_delete ($ref);
+    return $md5_link . NL . $delete_link_code;
+}
+
+/**
+  * Delete a block.
+  * @param $id identifier of the block.
+  */
+function
+jirafeau_block_delete_ ($id)
+{
+    $p = VAR_BLOCK . s2p ($id);
+    if (!file_exists ($p))
+        return;
+        
+    if (file_exists ($p . $id))
+	unlink ($p . $id);
+    if (file_exists ($p . $id . '_infos'))
+        unlink ($p . $id . '_infos');
+    $parse = $p;
+    $scan = array();
+    while (file_exists ($parse)
+           && ($scan = scandir ($parse))
+           && count ($scan) == 2 // '.' and '..' folders => empty.
+           && basename ($parse) != basename (VAR_BLOCK)) 
+    {
+        rmdir ($parse);
+        $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
+    }
+}
+
+/**
+  * Create a file filled with zeros.
+  * @param $size size of the file.
+  * @return  a string corresponding to an id or the string "Error"
+  */
+function
+jirafeau_block_init ($size)
+{
+    if (!ctype_digit ($size) || $size <= 0)
+        return "Error";
+
+    /* Create folder. */
+    $id;
+    do
+    {
+        $id = jirafeau_gen_random (32);
+        $p = VAR_BLOCK . s2p ($id);
+    } while (file_exists ($p));
+    @mkdir ($p, 0755, true);
+    if (!file_exists ($p))
+    {
+        echo "Error";
+        return;
+    }
+
+    /* Create block. */
+    $p .= $id;
+    $h = fopen ($p, 'w');
+    $fill = str_repeat ("\0", 1024);
+    for ($cnt = 0; $cnt < $size; $cnt += 1024)
+    {
+	if ($size - $cnt < 1024)
+            $fill = str_repeat ("\0", $size - $cnt);
+        if (fwrite ($h, $fill) === false)
+        {
+            fclose ($h);
+            jirafeau_block_delete_ ($id);
+            return "Error";
+        }
+    }
+    fclose ($h);
+
+    /* Generate a write/delete code. */
+    $code = jirafeau_gen_random (12);
+
+    /* Add block infos. */
+    if (file_put_contents ($p . '_infos', date ('U') . NL . $size . NL . $code) === FALSE)
+    {
+        jirafeau_block_delete_ ($id);
+        return "Error";
+    }
+
+    return $id . NL . $code;
+}
+
+/**
+  * Read some data in a block.
+  * @param $id identifier of the block
+  * @param $start where to read data (starting from zero).
+  * @param $length length to read.
+  * @return  echo data
+  */
+function
+jirafeau_block_read ($id, $start, $length)
+{
+    if (!ctype_digit ($start) || $start < 0
+        || !ctype_digit ($length) || $length <= 0)
+    {
+        echo "Error";
+        return;
+    }
+
+    $p = VAR_BLOCK . s2p ($id) . $id;
+    if (!file_exists ($p))
+    {
+        echo "Error";
+        return;
+    }
+
+    /* Check date. */
+    $f = file ($p . '_infos');
+    $date = trim ($f[0]);
+    $block_size = trim ($f[1]);
+    $stored_code = trim ($f[2]);
+    /* Update date. */
+    if (date ('U') - $date > JIRAFEAU_HOUR
+        && date ('U') - $date < JIRAFEAU_MONTH)
+    {
+        if (file_put_contents ($p . '_infos', date ('U') . NL . $block_size . NL . $stored_code) === FALSE)
+        {
+            jirafeau_block_delete_ ($id);
+            echo "Error";
+            return;
+        }
+    }
+    /* Remove data. */
+    elseif (date ('U') - $date >= JIRAFEAU_MONTH)
+    {
+        echo date ('U'). " $date ";
+        jirafeau_block_delete_ ($id);
+        echo "Error";
+        return;
+    }
+
+    if ($start + $length > $block_size)
+    {
+        echo "Error";
+        return;
+    }
+
+    /* Read content. */
+    header ('Content-Length: ' . $length);
+    header ('Content-Disposition: attachment');
+
+    $r = fopen ($p, 'r');
+    if (fseek ($r, $start) != 0)
+    {
+        echo "Error";
+        return;
+    }
+    $c = 1024;
+    for ($cnt = 0; $cnt < $length && !feof ($r); $cnt += 1024)
+    {
+        if ($length - $cnt < 1024)
+            $c = $length - $cnt;
+        print fread ($r, $c);
+        ob_flush();
+    }
+    fclose ($r);
+}
+
+/**
+  * Write some data in a block.
+  * @param $id identifier of the block
+  * @param $start where to writing data (starting from zero).
+  * @param $data data to write.
+  * @param $code code to allow writing.
+  * @return  string "Ok" or string "Error".
+  */
+function
+jirafeau_block_write ($id, $start, $data, $code)
+{
+    if (!ctype_digit ($start) || $start < 0
+        || strlen ($code) == 0)
+        return "Error";
+
+    $p = VAR_BLOCK . s2p ($id) . $id;
+    if (!file_exists ($p))
+        return "Error";
+
+    /* Check date. */
+    $f = file ($p . '_infos');
+    $date = trim ($f[0]);
+    $block_size = trim ($f[1]);
+    $stored_code = trim ($f[2]);
+    /* Update date. */
+    if (date ('U') - $date > JIRAFEAU_HOUR
+        && date ('U') - $date < JIRAFEAU_MONTH)
+    {
+        if (file_put_contents ($p . '_infos', date ('U') . NL . $block_size . NL . $stored_code) === FALSE)
+        {
+            jirafeau_block_delete_ ($id);
+            return "Error";
+        }
+    }
+    /* Remove data. */
+    elseif (date ('U') - $date >= JIRAFEAU_MONTH)
+    {
+        jirafeau_block_delete_ ($id);
+        return "Error";
+    }
+
+    /* Check code. */
+    if ($stored_code != $code)
+    {
+        echo "Error";
+        return;
+    }
+
+    /* Check data. */
+    $size = $data['size'];
+    if ($size <= 0)
+        return "Error";
+    if ($start + $size > $block_size)
+        return "Error";
+    
+    /* Open data. */
+    $r = fopen ($data['tmp_name'], 'r');
+
+    /* Open Block. */
+    $w = fopen ($p, 'r+');
+    if (fseek ($w, $start) != 0)
+        return "Error";
+
+    /* Write content. */
+    $c = 1024;
+    for ($cnt = 0; $cnt <= $size && !feof ($w); $cnt += 1024)
+    {
+        if ($size - $cnt < 1024)
+            $c = $size - $cnt;
+        $d = fread ($r, $c);
+        fwrite ($w, $d);
+    }
+    fclose ($r);
+    fclose ($w);
+    unlink ($data['tmp_name']);
+    return "Ok";
+}
+
+/**
+  * Delete a block.
+  * @param $id identifier of the block.
+  * @param $code code to allow writing.
+  * @return  string "Ok" or string "Error".
+  */
+function
+jirafeau_block_delete ($id, $code)
+{
+    $p = VAR_BLOCK . s2p ($id) . $id;
+
+    if (!file_exists ($p))
+        return "Error";
+
+    $f = file ($p . '_infos');
+    $date = trim ($f[0]);
+    $block_size = trim ($f[1]);
+    $stored_code = trim ($f[2]);
+
+    if ($code != $stored_code)
+        return "Error";
+
+    jirafeau_block_delete_ ($id);
+    return "Ok";
+}
+
+/**
+ * Clean old unused blocks.
+ * @return number of cleaned blocks.
+ */
+function
+jirafeau_admin_clean_block ()
+{
+    $count = 0;
+    /* Get all blocks. */
+    $stack = array (VAR_BLOCK);
+    while (($d = array_shift ($stack)) && $d != NULL)
+    {
+        $dir = scandir ($d);
+
+        foreach ($dir as $node)
+        {
+            if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0)
+                continue;
+
+            if (is_dir ($d . $node))
+            {
+                /* Push new found directory. */
+                $stack[] = $d . $node . '/';
+            }
+            elseif (is_file ($d . $node) && preg_match ('/\_infos/i', "$node"))
+            {
+                /* Read block informations. */
+                $f = file ($d . $node);
+                $date = trim ($f[0]);
+                $block_size = trim ($f[1]);
+                if (date ('U') - $date >= JIRAFEAU_MONTH)
+                {
+                    jirafeau_block_delete_ (substr($node, 0, -6));
+                    $count++;
+                }
+            }
+        }
+    }
+    return $count;
+}
+
+
 ?>