X-Git-Url: https://git.p6c8.net/jirafeau.git/blobdiff_plain/ba6f06965a4d9846e23d99a0e9f74b1361c18c40..d84c94d93c6b5b446c7bc6e359bb8fc276107dff:/lib/functions.php

diff --git a/lib/functions.php b/lib/functions.php
index cb2226a..e48534e 100644
--- a/lib/functions.php
+++ b/lib/functions.php
@@ -18,90 +18,256 @@
  *  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 = ['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);
+    for ($i = 0; $i < $size; $i++)
+        $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 $o;
+}
+
+function
+jirafeau_human_size ($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 string
  */
-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 ()
+{
+    return jirafeau_human_size(
+            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 a string explaining the error
+ * @param $code the error code
+ * @returns a string explaining the error
  */
-function jirafeau_detect_collision($name, $dir) {
-  if(!file_exists($dir . $name)) {
-    return $name;
-  }
+function
+jirafeau_upload_errstr ($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
+            t
+            ('Your file was not uploaded correctly. You may succeed in retrying. ');
+        break;
 
-  $dot = strpos($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));
+    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;
 
-  return $new_name;
+    default:
+        break;
+    }
+    return t('Unknown error. ');
 }
 
-/**
- * gets a string explaining the error
- * @param $code the error code
- * @returns a string explaining the error
+/** Remove link and it's file
+ * @param $link the link's name (hash)
  */
-function jirafeau_upload_errstr($code) {
-  switch($code) {
-  case UPLOAD_ERR_INI_SIZE:
-  case UPLOAD_ERR_FORM_SIZE:
-    return _('Your file exceeds the maximum authorized file size.');
-    break;
 
-  case UPLOAD_ERR_PARTIAL:
-  case UPLOAD_ERR_NO_FILE:
-    return _('Your file was not uploaded correctly. You may succeed in retrying.');
-    break;
+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");
 
-  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;
+    $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);
+}
 
-  default:
-    break;
-  }
-  return _('Unknown error.');
+/**
+ * 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;
 }
 
 /**
@@ -110,80 +276,115 @@ 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, $cfg) {
-  if(empty($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);
-  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']);
+    $name = trim ($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. */
+    $delete_link_code = 0;
+    for ($i = 0; $i < 8; $i++)
+        $delete_link_code .= dechex (rand (0, 16));
+
+    /* 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));
 }
 
 /**
@@ -191,14 +392,17 @@ function jirafeau_upload($file, $one_time_download, $key, $time, $cfg) {
  * @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;
 }
 
 
@@ -211,16 +415,20 @@ $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);
 }
@@ -228,15 +436,183 @@ 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>';
     }
 }
 
+/**
+ * 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;
+}
 ?>