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IBM Connections Docs – file preview not possible for some CCM pdf files
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Julius Schwarzweller    

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:

bildschirmfoto-2016-11-16-um-08-29-59

At the same time we saw the following warning in the log:

bildschirmfoto-2016-11-15-um-12-02-38

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:

bildschirmfoto-2016-11-15-um-12-02-07

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:

mime-types

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 😉



---------------------
http://techblog.gis-ag.info/2016/11/17/ibm-connections-docs-file-preview-not-possible-for-some-ccm-pdf-files/
Nov 17, 2016
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