Workaround for attachment/image upload failing on IIS #1498

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OVERLORD · 2026-02-05T01:03:53+03:00

OVERLORD commented

2026-02-05 01:03:53 +03:00

Originally created by @sjoerdvanderhoorn on GitHub (Jan 18, 2020).

Describe the bug
Uploading a file attachment or inline image fails on my IIS 7.5 site. When inspecting the network traffic using the browser's developer tools, all requests fail specifically with a HTTP500 error.

Workaround

Edit file \app\Uploads\AttachmentService.php
Find line $attachmentData = file_get_contents($uploadedFile->getRealPath()); and replace with $attachmentData = file_get_contents($uploadedFile->getPathname());
Edit file \app\Uploads\ImageService.php
Find line $imageData = file_get_contents($uploadedFile->getRealPath()); and replace with $imageData = file_get_contents($uploadedFile->getPathname());

Your Configuration (please complete the following information):

Exact BookStack Version (Found in settings): v0.27.5
PHP Version: 7.4.1
Hosting Method (Nginx/Apache/Docker): IIS

Originally created by @sjoerdvanderhoorn on GitHub (Jan 18, 2020). **Describe the bug** Uploading a file attachment or inline image fails on my IIS 7.5 site. When inspecting the network traffic using the browser's developer tools, all requests fail specifically with a HTTP500 error. **Workaround** * Edit file `\app\Uploads\AttachmentService.php` * Find line `$attachmentData = file_get_contents($uploadedFile->getRealPath());` and replace with `$attachmentData = file_get_contents($uploadedFile->getPathname());` * Edit file `\app\Uploads\ImageService.php` * Find line `$imageData = file_get_contents($uploadedFile->getRealPath());` and replace with `$imageData = file_get_contents($uploadedFile->getPathname());` **Your Configuration (please complete the following information):** - Exact BookStack Version (Found in settings): v0.27.5 - PHP Version: 7.4.1 - Hosting Method (Nginx/Apache/Docker): IIS

OVERLORD closed this issue

2026-02-05 01:03:56 +03:00

OVERLORD commented

2026-02-05 01:04:00 +03:00

@ssddanbrown commented on GitHub (Dec 17, 2020):

Thanks for reporting @sjoerdvanderhoorn.

As far as I can tell, IIS 7.5 is fairly end-of-life and out of support at this point. I also have not heard of this issue from other IIS users. For those reasons I'm going to close this off but if the same is observed in more recent versions of IIS please feel free to open a new issue referencing this one.

@ssddanbrown commented on GitHub (Dec 17, 2020): Thanks for reporting @sjoerdvanderhoorn. As far as I can tell, IIS 7.5 is fairly end-of-life and out of support at this point. I also have not heard of this issue from other IIS users. For those reasons I'm going to close this off but if the same is observed in more recent versions of IIS please feel free to open a new issue referencing this one.

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