seaweedfs/weed/s3api/stats.go

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package s3api
import (
"github.com/seaweedfs/seaweedfs/weed/s3api/s3_constants"
stats_collect "github.com/seaweedfs/seaweedfs/weed/stats"
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"net/http"
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"strconv"
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"time"
)
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type StatusRecorder struct {
http.ResponseWriter
Status int
}
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func NewStatusResponseWriter(w http.ResponseWriter) *StatusRecorder {
return &StatusRecorder{w, http.StatusOK}
}
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func (r *StatusRecorder) WriteHeader(status int) {
r.Status = status
r.ResponseWriter.WriteHeader(status)
}
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func (r *StatusRecorder) Flush() {
r.ResponseWriter.(http.Flusher).Flush()
}
func track(f http.HandlerFunc, action string) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
bucket, _ := s3_constants.GetBucketAndObject(r)
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w.Header().Set("Server", "SeaweedFS S3")
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recorder := NewStatusResponseWriter(w)
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start := time.Now()
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f(recorder, r)
if recorder.Status == http.StatusForbidden {
if m, _ := stats_collect.S3RequestCounter.GetMetricWithLabelValues(
action, strconv.Itoa(http.StatusOK), bucket); m == nil {
bucket = ""
}
}
stats_collect.S3RequestHistogram.WithLabelValues(action, bucket).Observe(time.Since(start).Seconds())
stats_collect.S3RequestCounter.WithLabelValues(action, strconv.Itoa(recorder.Status), bucket).Inc()
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}
}