問題

When viewing a binary file stored in an SVN repository, the Source or Diff windows will show an ASCII rendering of the file.

診断

環境

• This only happens with SVN repositories

診断ステップ

• Obtain a copy of the original file which is not showing properly.
• Test in a local repository.

原因

Per SVN Red Book: Automatic Properties if the SVN properties are not manually set on a file, SVN will try to auto-detect the file type.  The auto-detection algorithm will sometimes fail, causing SVN to default set the property svn:mimetype type to blank, and assume the file is text.

ソリューション

Manually set the MIME type for the file.

• For a list of all MIME types, please refer to The Complete List of MIME Types

  svn propset svn:mimetype MIME_TYPE FILE_NAME

• Replace MIME_TYPE with the official type (e.g. application/pdf) and FILE_NAME with the name of the file in the repository