Patch #3534

Mask image/x-png as image/png

Added by Sijmen Mulder about 13 years ago. Updated over 6 years ago.

Status:ClosedStart date:2009-06-24
Priority:NormalDue date:
Assignee:-% Done:


Target version:-


Internet Explorer uploads PNG files with content type image/x-png, while the official content type is image/png. This is no big deal but Google Chrome doesn't interpret image/x-png as a PNG image and downloads it as if it were an octet stream.

A proposed patch is attached. I've modified the attachments controller to report image/x-png as image/png when serving attachments so that Chrome correctly shows the image inline.

This code could also have gone into the upload part, but I felt it was a bad idea to modify the database for this. There's a test included but I couldn't easily get the tests to run so it is untested.

Based on trunk r2792.

pngtype.diff Magnifier - Proposed patch (2.25 KB) Sijmen Mulder, 2009-06-24 11:16


#1 Updated by Toshi MARUYAMA about 11 years ago

  • Status changed from New to Closed

I can see inline image in Google Chrome 11.0.696.71.

#2 Updated by Rodrigo Rosenfeld Rosas over 9 years ago

I can confirm this bug and it is still present. I also didn't understand why it didn't happen in my local Redmine instance but it happened on production but now I see that the reason is that IE8 is being used by the reporter, thanks!

#3 Updated by Toshi MARUYAMA almost 9 years ago

  • Status changed from Closed to Reopened

#4 Updated by Toshi MARUYAMA almost 9 years ago

Reopen request #14856.

#5 Updated by Rodrigo Rosenfeld Rosas almost 9 years ago

To reproduce this, just attach a PNG image using IE8 and try to click on it on Chrome and it will ask you to download it instead of displaying it.

#6 Updated by Go MAEDA over 6 years ago

  • Status changed from Reopened to Closed

No problem in Chrome 45.0.2454.101. Chrome now supports image/x-png.

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