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<?php
class ArrayFileStream {
private $open_file, $position;
private static $fs;
static function set_filesystem(array $fs) {
ArrayFileStream::$fs = $fs;
}
private static function &get_element($path) {
$result =& ArrayFileStream::$fs;
foreach (preg_split('/\//', $path, -1, PREG_SPLIT_NO_EMPTY) as $element) {
if (!isset($result[$element])) {
$null = NULL;
return $null;
}
$result =& $result[$element];
}
return $result;
}
private static function &get_file($path) {
$url = parse_url($path);
$file =& self::get_element($url['host'] . $url['path']);
if (is_null($file)) {
throw new Exception("file not found.");
}
return $file;
}
function stream_close() {
# nothing to do
}
function stream_flush() {
# nothing to do
}
function stream_open($path, $mode, $options, $opened_path) {
try {
$this->open_file =& self::get_file($path);
$this->position = 0;
return true;
} catch (Exception $e) {
return false;
}
}
function stream_read($count) {
$ret = substr($this->open_file, $this->position, $count);
$this->position += strlen($ret);
return $ret;
}
function stream_write($data) {
$left = substr($this->open_file, 0, $this->position);
$right = substr($this->open_file, $this->position + strlen($data));
$this->open_file = $left . $data . $right;
$this->position += strlen($data);
return strlen($data);
}
function stream_tell() {
return $this->position;
}
function stream_eof() {
return $this->position >= strlen($this->open_file);
}
function stream_seek($offset, $whence) {
switch ($whence) {
case SEEK_SET:
if ($offset < strlen($this->open_file) && $offset >= 0) {
$this->position = $offset;
return true;
}
else {
return false;
}
break;
case SEEK_CUR:
if ($offset >= 0) {
$this->position += $offset;
return true;
}
else {
return false;
}
break;
case SEEK_END:
if (strlen($this->open_file) + $offset >= 0) {
$this->position = strlen($this->open_file) + $offset;
return true;
}
else {
return false;
}
break;
default:
return false;
}
}
function stream_stat() {
return array('size' => is_array($this->open_file)
? sizeof($this->open_file)
: strlen($this->open_file));
}
function unlink($path) {
$parent =& self::get_file(dirname($path));
if (is_array($parent) && isset($parent[basename($path)])) {
unset($parent[basename($path)]);
return TRUE;
}
return FALSE;
}
function rename($path_from, $path_to) {
throw new Exception('not implemented yet');
}
function mkdir($path, $mode, $options) {
throw new Exception('not implemented yet');
}
function rmdir($path, $options) {
throw new Exception('not implemented yet');
}
function dir_opendir($path, $options) {
try {
$this->open_file =& self::get_file($path);
} catch (Exception $e) {
return FALSE;
}
return is_array($this->open_file);
}
function url_stat($path, $flags) {
try {
$file =& self::get_file($path);
} catch (Exception $e) {
return FALSE;
}
$time = time();
$keys = array(
'dev' => 0,
'ino' => 0,
'mode' => is_array($file) ? 16832 : 33216, // chmod 700
'nlink' => 0,
'uid' => function_exists('posix_getuid') ? posix_getuid() : 0,
'gid' => function_exists('posix_getgid') ? posix_getgid() : 0,
'rdev' => 0,
'size' => $flags & STREAM_URL_STAT_QUIET
? @strlen($file) : strlen($file),
'atime' => $time,
'mtime' => $time,
'ctime' => $time,
'blksize' => 0,
'blocks' => 0
);
return array_merge(array_values($keys), $keys);
}
function dir_readdir() {
if (!is_array($this->open_file)) {
return FALSE;
}
$result = key($this->open_file);
if ($result === NULL) {
return FALSE;
}
next($this->open_file);
return $result;
}
function dir_rewinddir() {
throw new Exception('not implemented yet');
}
function dir_closedir() {
reset($this->open_file);
unset($this->open_file);
}
}
#ArrayFileStream::set_filesystem(
# array('tmp' =>
# array('a' => 'my content',
# 'b' => '<? echo "hallo welt!";')));
#stream_wrapper_register("var", "ArrayFileStream")
# or die("Failed to register protocol");
#$fp = fopen("var://tmp/a", "rw+");
#while (!feof($fp)) {
# var_dump(fgets($fp));
#}
#fwrite($fp, "line1\n");
#fwrite($fp, "line2\n");
#fwrite($fp, "line3\n");
#rewind($fp);
#var_dump(file_get_contents('var://tmp/a'));
#fclose($fp);
#unlink('var://tmp/a');
#var_dump(include 'var://tmp/b');
|
