wrong display of non-ascii-characters in UTF-8-svg

[trac.domain.gauner@…]

If I upload an svg file in UTF-8 encoding as an ticket attachment, containing Umlaute like ä, ö, ü, it diplays wrong characters for the umlaute.

Inside the ticket comment referencing the image, as well as on the attachment itself.

It seems not to be a problem of uploading, since on the server inside /env/files/attachments/ticket the svg is correctly, bitwise identical as I have uploaded it.

It is also not a question of my browser: If I open my original svg in Firefox, it displays correctly, if I open the one that trac delivers, either inside the ticket comment using the image, or directly under the raw-attachment/-URL or on the preview page under /attachment/ticket-URL, it fails. If I convert the svg from UTF-8 to ANSI and upload it, it works well. I already added svg to the trac.ini:

[mimeviewer]
mime_map = text/x-dylan:dylan,text/x-idl:ice,text/x-ada:ads:adb,image/svg+xml:svg
mime_map_patterns = text/plain:README(?!\.rst)|INSTALL(?!\.rst)|COPYING.*,image/svg+xml:.*svg

[Jun Omae]

Unable to reproduce it. demo-1.4/attachment/ticket/1050/test.svg. I consider your server has wrong configurations. Please ask on the MailingList for support questions.

[anonymous]

Thank You for pointing me to the mailing list. Also there people pointed me in direction of our webserver (apache2).

After looking in the headers with curl, I saw that for our environment:

   Content-Type: image/svg+xml; charset=iso-8859-15

comes back, while from https://trac.edgewall.org/demo-1.4/raw-attachment/ticket/1050/test.svg

   Content-Type: image/svg+xml; charset=utf-8

comes back.

Then I searched all apache .confs - nowhere is set anything like AddDefaultCharset iso-8859-15 or AddCharset iso-8859-15 and even adding

   AddCharset utf-8 .svg

in the appropriate apache-trac.conf didn't have any effect.

Now I figured out, that there's a trac.ini setting:

   [trac]
   default_charset =  iso-8859-15
which has to go to
   [trac]
   default_charset = utf-8

With this all works well.

So, I appreciate all help I received, even though this time it was totally leading me in the wrong direction. ;-)