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adjust metrics content-type #1361

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@ilrudie ilrudie commented Nov 8, 2024

mostly serve metrics with text/plain unless given an openmetrics Accept header

fixes #1356

@ilrudie ilrudie requested a review from a team as a code owner November 8, 2024 21:09
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@istio-testing istio-testing added the size/S Denotes a PR that changes 10-29 lines, ignoring generated files. label Nov 8, 2024
.to_lowercase()
.split(";")
.collect::<Vec<_>>()
.first()
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Do we know that prometheus will always scrape with openmetrics as the first 'accept'

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Good point, that is likely not a safe invariant

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metrics endpoint sends content-type: application/openmetrics-text
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