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scrape: Fix accept header (#11542)

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First of all, there was a typo: `encoding=delimited` was a left-over
in the `scrapeAcceptHeader`.

Second, the recently updated `version=1.0.0` prevents current versions
of client_golang to negotiate OpenMetrics, as they expect
`version=0.0.1` or no version at all. This commit adds, with lower
priority, the latter (no version at all) to the accept header.

Fixes #11540,

Signed-off-by: beorn7 <beorn@grafana.com>
This commit is contained in:
Björn Rabenstein 2022-11-07 18:22:03 +01:00 committed by GitHub
parent 033b3efb12
commit 54ce07e9a0
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1 changed files with 2 additions and 2 deletions
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4
scrape/scrape.go
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@ -773,8 +773,8 @@ type targetScraper struct {
var errBodySizeLimit = errors.New("body size limit exceeded")
const (
scrapeAcceptHeader = `encoding=delimited,application/openmetrics-text;version=1.0.0;q=0.75,text/plain;version=0.0.4;q=0.5,*/*;q=0.1`
scrapeAcceptHeaderWithProtobuf = `application/vnd.google.protobuf; proto=io.prometheus.client.MetricFamily; encoding=delimited,application/openmetrics-text;version=1.0.0;q=0.75,text/plain;version=0.0.4;q=0.5,*/*;q=0.1`
scrapeAcceptHeader = `application/openmetrics-text;version=1.0.0;q=0.75,application/openmetrics-text;q=0.6,text/plain;version=0.0.4;q=0.5,*/*;q=0.1`
scrapeAcceptHeaderWithProtobuf = `application/vnd.google.protobuf; proto=io.prometheus.client.MetricFamily; encoding=delimited,application/openmetrics-text;version=1.0.0;q=0.75,application/openmetrics-text;q=0.6,text/plain;version=0.0.4;q=0.5,*/*;q=0.1`
)
var UserAgent = fmt.Sprintf("Prometheus/%s", version.Version)