webuploader php解决中文文件上传问题

<?php
 
// Make sure file is not cached (as it happens for example on iOS devices)
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
 
if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') 
{
exit; // finish preflight CORS requests here
}
 
if ( !empty($_REQUEST[ 'debug' ]) ) 
{
$random = rand(0, intval($_REQUEST[ 'debug' ]) );
if ( $random === 0 ) 
{
header("HTTP/1.0 500 Internal Server Error");
exit;
}
}
 
// header("HTTP/1.0 500 Internal Server Error");
// exit;
 
@set_time_limit(5 * 60);
 
// Uncomment this one to fake upload time
// usleep(5000);
 
// Settings
// $targetDir = ini_get("upload_tmp_dir") . DIRECTORY_SEPARATOR . "plupload";
$targetDir = 'upload_tmp';
$uploadDir = 'upload';
 
$cleanupTargetDir = true; 
$maxFileAge = 5 * 3600;
 
if (!file_exists($targetDir)) 
{
@mkdir($targetDir);
}
 
if (!file_exists($uploadDir)) 
{
@mkdir($uploadDir);
}
 
if (isset($REQUEST["name"])) 
{
$fileName = $_REQUEST["name"];
} elseif (!empty($_FILES)) {
$fileName = $_FILES["file"]["name"];
} else
{
$fileName = uniqid("file");
}
//-------------------------------------------------------
//无论是什么文件名称，先unicode转utf8
//unicode转utf8
//注意$str='"..."'，内部双引号，外部单引号
//对于变量$str='..'，我们需要处理'"'.$str.'"',处理后成一个新变量
function unicode2utf8($str){
if(!$str) return $str;
$decode = json_decode($str);
if($decode) return $decode;
$str = '["' . $str . '"]';
$decode = json_decode($str);
if(count($decode) == 1){
return $decode[0];
}
return $str;
}
 
$fileName=unicode2utf8('"'.$fileName.'"');
$fileName= iconv("UTF-8", "GBK", $fileName);//防止fopen语句失效
//-----------------------------------------------------------------------
 
$filePath = $targetDir . DIRECTORY_SEPARATOR . $fileName;
$uploadPath = $uploadDir . DIRECTORY_SEPARATOR . $fileName;
 
// Chunking might be enabled
$chunk = isset($_REQUEST["chunk"]) ? intval($_REQUEST["chunk"]) : 0;
$chunks = isset($_REQUEST["chunks"]) ? intval($_REQUEST["chunks"]) : 1;
 
// Remove old temp files
 
if ($cleanupTargetDir) 
{
if (!is_dir($targetDir) || !$dir = opendir($targetDir)) 
{ 
die('{"jsonrpc" : "2.0", "error" : {"code": 100, "message": "Failed to open temp directory."}, "id" : "id"}');
 
while (($file = readdir($dir)) !== false) 
   { 
   $tmpfilePath = $targetDir . DIRECTORY_SEPARATOR . $file;
 
    // If temp file is current file proceed to the next
    if ($tmpfilePath == "{$filePath}_{$chunk}.part" || $tmpfilePath == "{$filePath}_{$chunk}.parttmp") 
    {  
      continue;
    }
 
    // Remove temp file if it is older than the max age and is not the current file
 
    if (preg_match('/\.(part|parttmp)$/', $file) && (@filemtime($tmpfilePath) < time() - $maxFileAge)) 
    {  
      @unlink($tmpfilePath);
    }
}//while
closedir($dir);
}
 
// Open temp file
if (!$out = @fopen("{$filePath}_{$chunk}.parttmp", "wb"))
{
die('{"jsonrpc" : "2.0", "error" : {"code": 102, "message": "Failed to open output stream."}, "id" : "id"}');
}
 
if (!empty($_FILES)) 
{
if ($_FILES["file"]["error"] || !is_uploaded_file($_FILES["file"]["tmp_name"]))
{
die('{"jsonrpc" : "2.0", "error" : {"code": 103, "message": "Failed to move uploaded file."}, "id" : "id"}');
}
 
// Read binary input stream and append it to temp file
 if (!$in = @fopen($_FILES["file"]["tmp_name"], "rb")) 
  { 
   die('{"jsonrpc" : "2.0", "error" : {"code": 101, "message": "Failed to open input stream."}, "id" : "id"}');
   }
}
else
{
if (!$in = @fopen("php://input", "rb")) 
{
die('{"jsonrpc" : "2.0", "error" : {"code": 101, "message": "Failed to open input stream."}, "id" : "id"}');
}
}
while ($buff = fread($in, 4096))
{
fwrite($out, $buff);
}
 
@fclose($out);
@fclose($in);
 
rename("{$filePath}{$chunk}.parttmp", "{$filePath}{$chunk}.part");
 
$index = 0;
$done = true;
for( $index = 0; $index < $chunks; $index++ ) 
{
if ( !file_exists("{$filePath}{$index}.part") ) 
{
$done = false;
break;
}
}
if ( $done ) 
{
if (!$out = @fopen($uploadPath, "wb"))
{
die('{"jsonrpc" : "2.0", "error" : {"code": 102, "message": "Failed to open output stream."}, "id" : "id"}');
}
//flock($hander,LOCK_EX)文件锁
if ( flock($out, LOCK_EX) ) 
{
for( $index = 0; $index < $chunks; $index++ ) 
{
if (!$in = @fopen("{$filePath}{$index}.part", "rb")) 
{
break;
}
 
        while ($buff = fread($in, 4096))
        {
            fwrite($out, $buff);
        }
 
        @fclose($in);
        @unlink("{$filePath}_{$index}.part");
    }
 
    flock($out, LOCK_UN);
 }
@fclose($out);
//我们可以在这里进行入库操作，以json_encode(数组)返回给客户端，由uploadSuccess事件处理
}
?>