Description
Context
The provided schedule.xml is fetched by the FOSDEM Schedule app for Android to render the conference program in the mobile app.
To avoid unneeded downloads of the schedule when unchanged the app reads the HTTP ETag of the response and adds it to each subsequent request. If the schedule has not changed a server supporting HTTP ETag would respond with an HTTP 304 NOT MODIFIED status code and an empty response payload.
Also, schedule update announcements are presented to the user of the app. These should not be shown when the schedule has not changed.
Current state
The server seems not to support HTTP ETag for the given URL:
$ curl -I -H "If-None-Match: " https://fosdem.org/2024/schedule/xml /dev/null 2>&1
HTTP/2 200
server: nginx
date: Fri, 12 Jan 2024 09:09:07 GMT
content-type: text/xml; charset=utf-8
content-length: 1579543
last-modified: Fri, 12 Jan 2024 06:48:51 GMT
vary: Accept-Encoding
expires: Fri, 12 Jan 2024 09:14:07 GMT
cache-control: max-age=300
strict-transport-security: max-age=31536000; includeSubDomains; preload
x-frame-options: SAMEORIGIN
x-content-type-options: nosniff
x-xss-protection: 1; mode=block
content-security-policy: default-src 'self'; script-src 'self' 'unsafe-inline'; media-src 'self' http: https:; img-src 'self' data: *.fosdem.org; object-src 'self'; style-src 'self' 'unsafe-inline';
accept-ranges: bytesRequest
Can you please add support for HTTP ETag to the webserver before/during/after the conference? I am mentioning all time frames because some conferences tend to archive their schedule as a static resource which then no longer supports HTTP ETag.
Activity