IBM Connections Docs – file preview not possible for some CCM pdf files
Hi all,
last week we had trouble in a customer environment using the file preview functionality for some pdf files (only those that were uploaded using CCM).
Instead of a preview the message was displayed:
At the same time we saw the following warning in the log:
The mime-type was set to “image/pcl” instead of “application/pdf”… this mime-type is not supported by IBM Docs File viewer. We had to dig deep into the customers’ environment in order to find the solution…
If you browse to https://connections.server.com/acce we filtered all files with this buggy mime-type:
Testing this issue with different browsers:
- FF – does not work
- IE – works
- Chrome – works
- Safari – works
- Connections Desktop Plugins – works
Our idea was that the mime-type is set based on a specific browser setting…
Firefox has its own mime-types table definition: mimeTypes.rdf in the FF profile folder. Looking into this file we found the ambiguous entry:
This seems to be a known problem:
https://support.mozilla.org/en-US/questions/932120
The fix:
- Close FF
- Delete the mime-types.rdf file
- Start FF (the mime-types.rdf file is recreated without the erroneous entry)
Uploading a pdf file with this new setting creates the correct mime-type within CCM so that the file preview for CCM files starts working again.
Unfortunately, we could not find a solution how to change the mime-type for already uploaded files (with wrong mime-type) – only re-uploading with the correct setting works here. Changing stuff in the Filenet databases is no fun 😉