用于修复 .eml 文件名中以 =_iso-8859-1... 开头的文件名的工具？

Question 1

我为自己编写了一个 PHP 脚本。我想分享它，以防其他人遇到类似的问题。它对我和我需要的编码都有效（您可能需要扩展编码数组）。

该脚本将 MIME 编码文件名称将整个指定的目录结构递归转换为 UTF-8。

它无法产生完全完美的结果：有几个特殊字符被双重转换，或者根本没有转换。据我所知，这是 IMAP 导出器的错误或电子邮件本身的编码信息不正确。

mb_decode_mimeheader()是整个事情的核心。

发布到公共领域；不提供任何保证。需要 PHP 5.2。

它应该在 CLI 和 Web 上运行；我在浏览器中对其进行了测试。

在对数据运行此类脚本之前，请先进行备份。

<?php

 /* Directory to parse */
 $dir = "D:/IMAP";
 /* Extensions to parse. Leave empty for none */
 $extensions = array("eml");
 /* Set to true to actually run the renaming */
 define ("GO", true);

 /* No need to change past this point */  

 /* Output content type header if not in CLI */
 if (strtolower(php_sapi_name()) != "CLI")
  header("Content-type: text/plain; charset=utf-8");


 $FixNames = new FixEmlNames($dir, $extensions);
 $FixNames->fixAll();



  class FixEmlNames
   {

     /* List of possible encodings here */
     private $encodings = array("iso-8859-1", "iso-8859-15", "windows-1252", "utf-8");
     /* Encoding Prefix. The exporter exports e.g. =_iso-8859-1_ with underscores 
        instead of question marks */
     private $encoding_prefix = "=_";
     /* Encoding postfix */
     private $encoding_postfix = "_";
     /* Temporary storage for files */
     private $files;
     /* Array of file extensions to process. Leave empty to parse all files and directories */
     private $extensions = array(); 
     /* Count of renamed files */
     private $count = 0;
     /* Count of failed renames */
     private $failed = 0;
     /* Count of skipped renames */
     private $skipped = 0;
     /* Transform forbidden characters in host OS */
     private $transform_characters = array(":" => "_", "?" => "_", ">" => "_");

     function __construct($dir, $extensions = array("eml"))
       { 

        $this->files = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($dir));
        $this->extensions = $extensions;
       }

     function fixAll()
      {
        echo "Starting....\n";

        while($this->files->valid())
        {
         if (!$this->files->isDot())
          {

           $path = $this->files->key();
           $ext  = pathinfo($path, PATHINFO_EXTENSION);

           if ((count($this->extensions) == 0 ) or (in_array($ext, $this->extensions)))
            $this->renameOne($path);

          }
         $this->files->next();
        }

        echo "Done. ";

        /* Show stats */
        $status = array();

        if ($this->count > 0) $status[] = $this->count." OK";
        if ($this->failed > 0) $status[] = $this->failed." failed";
        if ($this->skipped > 0) $status[] = $this->skipped." skipped";

        echo implode(", ", $status);


      }

      function  renameOne($fullPath)
       {


          $filename = pathinfo($fullPath, PATHINFO_BASENAME); 
          $is_mime = false;

          // See whether file name is MIME encoded or not
          foreach ($this->encodings as $encoding)
           { if (stristr($filename, $this->encoding_prefix.$encoding.$this->encoding_postfix))
              $is_mime = true;
           }

           // No MIME encoding? Skip.
           if (!$is_mime)
            {
              # uncomment to see skipped files
              # echo "Skipped: $filename\n";
              $this->skipped++;
              return true;
            }

           mb_internal_encoding("UTF-8"); 
           $filename = str_replace("_", "?", $filename);  // Question marks were converted to underscores
           $filename = mb_decode_mimeheader($filename);
           $filename = str_replace("?", "_", $filename);  


           // Remove forbidden characters
           $filename = strtr($filename, $this->transform_characters);

          // Rename
          if (constant("GO") == true)
           {
            // We catch the error manually
            $old = error_reporting(0);
            $success = rename($fullPath, realpath(dirname($fullPath)).DIRECTORY_SEPARATOR.$filename); 
            error_reporting($old);        

          if ($success)
           {
           echo "OK: $filename\n";
           $this->count++; 
           return true;
           }
          else
           {
             $error = error_get_last();
             $message = $error["message"];
             $this->failed++;
             echo "Failed renaming $fullPath. Error message: ".$message."\n";
             return false;
           }
           }
           else
           {
             $this->count++;  
             echo "Simulation: $filename\n";
             return true;   
           }
       }


   }

Answer

我为自己编写了一个 PHP 脚本。我想分享它，以防其他人遇到类似的问题。它对我和我需要的编码都有效（您可能需要扩展编码数组）。

该脚本将 MIME 编码文件名称将整个指定的目录结构递归转换为 UTF-8。