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ijurisic
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Hello,
When I check mime type I got wrong type for docx.
Code:
PHP Code: $path='test.docx'; $file = new \CodeIgniter\Files\File($path); $type = $file->getMimeType(); echo $type;
I got:
application/octet-stream
But if use file from bash:
file -b --mime-type 'test1.docx' I got:
application/vnd.openxmlformats-officedocument.wordprocessingml.document
Any idea what is problem?
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ijurisic
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I using CI 4.3.2. Tested on Debian 11 (php 7.4) and Debian 12 (php 8.2).
Simple way for get error:
- open libreoffice writer and write single word "test1", save in docx format (getMimeType work as expect).
- add picture in document and save document (getMimeType don't work as expect I got "application/octet-stream")
Example of file can download from link - test1.docx
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JustJohnQ
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It looks like LibreOffice changes the mime type.
I tested using a native PHP function:
PHP Code: $finfo = finfo_open(FILEINFO_MIME_TYPE); // return mime type - all mimetype extension $filename = "E:\\test1.docx"; echo $filename . ": " . finfo_file( $finfo, $filename ) . "<br>"; echo $filename . ": " . mime_content_type( $filename ) . "<br>";
When I add an image to the doc in LibreOffice, the mime type changes to application/octet-stream.
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ijurisic
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(03-27-2023, 12:46 AM)kenjis Wrote: Yes, the file is "application/octet-stream".
And the file command also returns it on my macOS.
$ file -b --mime-type test1.docx
application/octet-stream
When I try got diferent result from file:
file -b --mime-type test1.docx
application/vnd.openxmlformats-officedocument.wordprocessingml.document
But from CI4 I got: application/octet-stream
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ijurisic
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(03-27-2023, 12:46 AM)JustJohnQ Wrote: It looks like LibreOffice changes the mime type.
I tested using a native PHP function:
PHP Code: $finfo = finfo_open(FILEINFO_MIME_TYPE); // return mime type - all mimetype extension $filename = "E:\\test1.docx"; echo $filename . ": " . finfo_file( $finfo, $filename ) . "<br>"; echo $filename . ": " . mime_content_type( $filename ) . "<br>";
When I add an image to the doc in LibreOffice, the mime type changes to application/octet-stream.
If update this:
PHP Code: $finfo = finfo_open(FILEINFO_MIME_TYPE)
with:
PHP Code: $finfo = finfo_open(FILEINFO_MIME_TYPE,'/etc/magic')
And added in /etc/magic :
Code: #------------------------------------------------------------------------------
# $File: msooxml,v 1.19 2023/03/14 19:46:15 christos Exp $
# msooxml: file(1) magic for Microsoft Office XML
# From: Ralf Brown <[email protected]>
# .docx, .pptx, and .xlsx are XML plus other files inside a ZIP
# archive. The first member file is normally "[Content_Types].xml".
# but some libreoffice generated files put this later. Perhaps skip
# the "[Content_Types].xml" test?
# Since MSOOXML doesn't have anything like the uncompressed "mimetype"
# file of ePub or OpenDocument, we'll have to scan for a filename
# which can distinguish between the three types
0 name msooxml
>0 string word/ Microsoft Word 2007+
!:mime application/vnd.openxmlformats-officedocument.wordprocessingml.document
!:ext docx
>0 string ppt/ Microsoft PowerPoint 2007+
!:mime application/vnd.openxmlformats-officedocument.presentationml.presentation
!:ext pptx
>0 string xl/ Microsoft Excel 2007+
!:mime application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
!:ext xlsx
>0 string visio/ Microsoft Visio 2013+
!:mime application/vnd.ms-visio.drawing.main+xml
>0 string AppManifest.xaml Microsoft Silverlight Application
!:mime application/x-silverlight-app
# start by checking for ZIP local file header signature
0 string PK\003\004
!:strength +10
# make sure the first file is correct
>0x1E use msooxml
>0x1E default x
>>0x1E regex \\[Content_Types\\]\\.xml|_rels/\\.rels|docProps|customXml
# skip to the second local file header
# since some documents include a 520-byte extra field following the file
# header, we need to scan for the next header
>>>(18.l+49) search/6000 PK\003\004
# now skip to the *third* local file header; again, we need to scan due to a
# 520-byte extra field following the file header
>>>>&26 search/6000 PK\003\004
# and check the subdirectory name to determine which type of OOXML
# file we have. Correct the mimetype with the registered ones:
# https://technet.microsoft.com/en-us/library/cc179224.aspx
>>>>>&26 use msooxml
>>>>>&26 default x
# OpenOffice/Libreoffice orders ZIP entry differently, so check the 4th file
>>>>>>&26 search/6000 PK\003\004
>>>>>>>&26 use msooxml
# Some OOXML generators add an extra customXml directory. Check another file.
>>>>>>>&26 default x
>>>>>>>>&26 search/6000 PK\003\004
>>>>>>>>>&26 use msooxml
>>>>>>>>>&26 default x Microsoft OOXML
>>>>>>>&26 default x Microsoft OOXML
>>>>>&26 default x Microsoft OOXML
>>0x1E regex \\[trash\\]
>>>&26 search/6000 PK\003\004
>>>>&26 search/6000 PK\003\004
>>>>>&26 use msooxml
>>>>>&26 default x
>>>>>>&26 search/6000 PK\003\004
>>>>>>>&26 use msooxml
>>>>>>>&26 default x Microsoft OOXML
>>>>>>&26 default x Microsoft OOXML
>>>>>&26 default x Microsoft OOXML
Now detect all office documents.
I check CI4 framework in system/Files/File.ph is function getMimeType() and don't have option for add custom magic file:
PHP Code: /** * Retrieve the media type of the file. SHOULD not use information from * the $_FILES array, but should use other methods to more accurately * determine the type of file, like finfo, or mime_content_type(). * * @return string The media type we determined it to be. */ public function getMimeType(): string { if (! function_exists('finfo_open')) { return $this->originalMimeType ?? 'application/octet-stream'; // @codeCoverageIgnore }
$finfo = finfo_open(FILEINFO_MIME_TYPE); $mimeType = finfo_file($finfo, $this->getRealPath() ?: $this->__toString()); finfo_close($finfo);
return $mimeType; }
mabye we can suggest to added that option?
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JustJohnQ
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There is a convo that this potentially is a bug in LibreOffice:
https://bugs.documentfoundation.org/show...?id=101317
I don't see any reason why the mime type is changed after adding an image to a document.
Allowing mime type 'application/octet-stream' sounds dangerous to me.
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