feat: issue2551068 - Provide way to retrieve file/msg data via rest endpoint. Use Allow header to change format of /binary_content endpoint. If Allow header for endpoint is not application/json, it will be matched against the mime type for the file. */*, text/* are supported and will return the native mime type if present. Changes: move */* mime type from static dict of supported types. It was hardcoded to return json only. Now it can return a matching non-json mime type for the /binary_content endpoint. Edited some errors to explicitly add */* mime type. Cleanups to use ', ' separation in lists of valid mime types rather than just space separated. Remove ETag header when sending raw content. See issue 2551375 for background. Doc added to rest.txt. Small format fix up (add dash) in CHANGES.txt. Make passing an unset/None/False accept_mime_type to format_dispatch_output a 500 error. This used to be the fallback to produce a 406 error after all processing had happened. It should no longer be possible to take that code path as all 406 errors (with valid accept_mime_types) are generated before processing takes place. Make format_dispatch_output handle output other than json/xml so it can send back binary_content data. Removed a spurious client.response_code = 400 that seems to not be used. Tests added for all code paths. Database setup for tests msg and file entry. This required a file upload test to change so it doesn't look for file1 as the link returned by the upload. Download the link and verify the data rather than verifying the link. Multiple formatting changes to error messages to make all lists of valid mime types ', ' an not just space separated.

--- a/CHANGES.txt	Sun Dec 08 09:11:53 2024 -0500
+++ b/CHANGES.txt	Sun Dec 08 17:22:33 2024 -0500
@@ -47,7 +47,7 @@
 - issue2551315 - Document use of
   RestfulInstance.max_response_row_size to limit data returned
   from rest request.
-- issue2551330 Add an optional 'filter' function to the Permission
+- issue2551330 - Add an optional 'filter' function to the Permission
   objects and the addPermission method. This is used to optimize search
   performance by not checking items returned from a database query
   one-by-one (using the check function) but instead offload the
@@ -60,6 +60,11 @@
   address. This logs the actual client address when
   roundup-server is run behind a reverse proxy. It also appends a
   + sign to the logged address/name. (John Rouillard)
+- issue2551068 - Provide way to retrieve file/msg data via rest
+  endpoint. Raw file/msg data can be retrieved using the
+  /binary_content attribute and an Accept header to select the mime
+  type for the data (e.g. image/png for a png file). The existing html
+  interface method still works and is supported, but is legacy.
 
 2024-07-13 2.4.0