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middleware.go
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middleware.go
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package tracing
import (
"time"
"net/http"
sentryhttp "github.com/getsentry/sentry-go/http"
"github.com/openrm/module-tracing-golang/log"
"github.com/openrm/module-tracing-golang/propagation"
"go.opencensus.io/plugin/ochttp"
"go.opencensus.io/trace"
)
type ContextKey struct {
Namespace string
}
var SpanContextKey = ContextKey{"span"}
var sentryHandlerOptions = sentryhttp.Options{
Repanic: true,
WaitForDelivery: false,
Timeout: 2 * time.Second,
}
func SetSentryHandlerOptions(opts sentryhttp.Options) {
sentryHandlerOptions.WaitForDelivery = opts.WaitForDelivery
sentryHandlerOptions.Timeout = opts.Timeout
}
func Middleware() func(http.Handler) http.Handler {
sentryHandler := sentryhttp.New(sentryHandlerOptions)
loggingHandler := log.Handler(log.Options{ TraceHeader: traceHeader })
return func(handler http.Handler) http.Handler {
handler = sentryHandler.Handle(handler)
handler = loggingHandler(handler)
return &ochttp.Handler{
Propagation: &propagation.HTTPFormat{
Header: traceHeader,
},
Handler: handler,
GetStartOptions: func(r *http.Request) trace.StartOptions {
for _, re := range log.GetExcludePatterns() {
if re.MatchString(r.URL.Path) {
return trace.StartOptions{ Sampler: trace.NeverSample() }
}
}
return trace.StartOptions{}
},
}
}
}