Unhandled Exception: Error on line 1, column 13: expected no more input. max-age=1.00:00:00

[Ram8948]

Flutter & ArcGIS SDK Tip: Fixing Non-Standard Cache-Control Header Parsing for Enterprise Services

During development with ArcGIS Maps SDK for Flutter (arcgis_maps 200.8.0+4672), I hit a frustrating exception:
Unhandled Exception: Error on line 1, column 13: expected no more input.
max-age=1.00:00:00

What happened?
The ArcGIS Enterprise server returned a non-standard Cache-Control header with a max-age value formatted as 1.00:00:00 (day.hour:min:sec), which doesn’t conform to HTTP specs expecting seconds as an integer.
This caused Flutter's HTTP cache parser to crash.

How I fixed it:
I intercepted the Cache-Control header in my Flutter Dio client and transformed these invalid max-age values into the correct number of seconds. Key parts of the fix:

Added a regex to recognize durations like max-age=1.00:00:00.
Parsed the days, hours, minutes, and seconds and converted them into seconds.
Replaced the header value with max-age=86400 (for 1 day).
This happens before the cache parsing, preventing the exception.

[PaulAllanSturm]

Ah yes, this is a good catch and a good fix, thank you. We'll include a fix for this in the next release of the arcgis_maps package.