rar zip files MIME Type

Question

I m developing a simple php upload script  and users can upload only ZIP and RAR files   What MIME types I should use to check   FILES x  type    a complete list please   Thank you

User · Answer

For upload   An official list of mime types can be found at The Internet Assigned Numbers Authority  IANA    According to their list Content-Type header for zip is application zip   The media type for rar files is not officially registered at IANA but the unofficial commonly used mime-type value is application x-rar-compressed   application octet-stream means as much as   I send you a file stream and the content of this stream is not specified   so it is true that it can be a zip or rar file as well   The server is supposed to detect what the actual content of the stream is    Note  For upload it is not safe to rely on the mime type set in the Content-Type header  The header is set on the client and can be set to any random value  Instead you can use the php file info functions to detect the file mime-type on the server      For download   If you want to download a zip file and nothing else you should only set one single Accept header value  Any additional values set will be used as a fallback in case the server cannot satisfy your in the Accept header requested mime-type   According to the WC3 specifications this    application zip  application octet-stream    will be intrepreted as   I prefer a application zip mime-type  but if you cannot deliver this an application octet-stream  a file stream  is also fine    So only a single   application zip   Will guarantee you a zip file  or a 406 - Not Acceptable response in case the server is unable to satisfy your request

User · Answer

I see many answer reporting for zip and rar the Media Types application zip and application x-rar-compressed  respectively  While the former matching is correct   for the latter  IANA reports here https   www iana org assignments media-types application vnd rar that for rar application x-rar-compressed is a deprecated alias name and instead application vnd rar is the official one  So  right Media Types from IANA in 2020 are   zip  application zip rar  application vnd rar

User · Answer

In a linked question  there s some Objective-C code to get the mime type for a file URL  I ve created a Swift extension based on that Objective-C code to get the mime type   import Foundation import MobileCoreServices  extension URL       var mimeType  String            guard self pathExtension count    0 else               return nil                    let pathExtension   self pathExtension as CFString         if let preferredIdentifier   UTTypeCreatePreferredIdentifierForTag kUTTagClassFilenameExtension  pathExtension  nil                guard let mimeType   UTTypeCopyPreferredTagWithClass preferredIdentifier takeRetainedValue    kUTTagClassMIMEType  else                   return nil                           return mimeType takeRetainedValue   as String                    return nil

User · Answer

The answers from freedompeace  Kiyarash and Sam Vloeberghs    rar    application x-rar-compressed  application octet-stream  zip    application zip  application octet-stream  application x-zip-compressed  multipart x-zip   I would do a check on the file name too  Here is how you could check if the file is a RAR or ZIP file  I tested it by creating a quick command line application    lt  php  if  isRarOrZip  argv 1          echo  It is probably a RAR or ZIP file      else       echo  It is probably not a RAR or ZIP file       function isRarOrZip  file           get the first 7 bytes      bytes   file get contents  file  FALSE  NULL  0  7        ext   strtolower substr  file  - 4            RAR magic number  Rar  x1A x07 x00        http   en wikipedia org wiki RAR     if   ext      rar  and bin2hex  bytes      526172211a0700             return TRUE                ZIP magic number  none  though PK 003 004  PK 005 006  empty archive           or PK 007 008  spanned archive  are common         http   en wikipedia org wiki ZIP  file format      if   ext      zip  and substr  bytes  0  2      PK             return TRUE             return FALSE      Notice that it still won t be 100  certain  but it is probably good enough     rar exe l somefile zip somefile zip is not RAR archive   But even WinRAR detects non RAR files as SFX archives     rar exe l somefile srr SFX Volume somefile srr

User · Answer

As extension might contain more or less that three characters the following will test for an extension regardless of the length of it    Try this    allowedExtensions   array   mkv    mp3    flac       temp   explode        FILES  file   name      extension   strtolower end  temp     if  in array   extension   allowedExtensions             to check for all characters after the last

User · Answer

You should not trust   FILES  upfile    mime    check MIME type by yourself  For that purpose  you may use fileinfo extension  enabled by default as of PHP 5 3 0      fileInfo   new finfo FILEINFO MIME TYPE      fileMime    fileInfo- gt file   FILES  upfile    tmp name        validMimes   array        zip    gt   application zip        rar    gt   application x-rar            fileExt   array search  fileMime   validMimes  true     if  fileExt     zip   amp  amp   fileExt     rar       throw new RuntimeException  Invalid file format       NOTE  Don t forget to enable the extension in your php ini and restart your server   extension php fileinfo dll

[php] .rar, .zip files MIME Type

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