Getting Upload Image mime type is application/octet-stream

Question

While uploading file I am getting mime-type as application/octet-stream.

I have come to know that Zend_Frameworks tries to determine the mimetype in two ways:

First it tries to use the PECL FILEINFO-Extension (which is not installed on every server) if the extension is not istalled it tries to use mime_content_type (a php function). This function however is deprecated as of php version 5.3

So what to do now? How can I be sure that user uploading a file is image only and not something else? How can I detect mime type of uploaded file?

score 1 · Answer 1 · answered Apr 03 '12 at 07:33

1

For images you can also rely on exif_imagetype but I would recommend that you install finfo.

See this for an example implementation.

answered Apr 03 '12 at 07:33

Alix Axel

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Mouna Cheikhna · Answer 2 · 2012-04-03T07:44:13.460

0

Use Zend_File_Transfer validators to exlude types that you dont want :

    $upload = new Zend_File_Transfer();

   // Does not allow MIME type application/pdf and application/zip .
   $upload->addValidator('ExcludeMimeType', false, array('application/pdf',
                                                  'application/zip'));

or you can also use IsImage validator which checks if a transferred file is a image file :

$upload = new Zend_File_Transfer();

// Checks whether the uploaded file is a image file
$upload->addValidator('IsImage', false);

edited Apr 03 '12 at 07:44

answered Apr 03 '12 at 07:35

Mouna Cheikhna

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oups , i meant ExcludeMimeType instead . – Mouna Cheikhna Apr 03 '12 at 07:40
Took back my vote, the `ExcludeMimeType` approach is probably based on `finfo` and `mime_content_type` so it shouldn't work. The `IsImage` validator should. – Alix Axel Apr 03 '12 at 08:05

Getting Upload Image mime type is application/octet-stream

2 Answers2