common.go raw

   1  // Copyright The OpenTelemetry Authors
   2  // SPDX-License-Identifier: Apache-2.0
   3  
   4  package otelhttp // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
   5  
   6  import (
   7  	"net/http"
   8  
   9  	"go.opentelemetry.io/otel/attribute"
  10  	"go.opentelemetry.io/otel/trace"
  11  )
  12  
  13  // Attribute keys that can be added to a span.
  14  const (
  15  	ReadBytesKey  = attribute.Key("http.read_bytes")  // if anything was read from the request body, the total number of bytes read
  16  	ReadErrorKey  = attribute.Key("http.read_error")  // If an error occurred while reading a request, the string of the error (io.EOF is not recorded)
  17  	WroteBytesKey = attribute.Key("http.wrote_bytes") // if anything was written to the response writer, the total number of bytes written
  18  	WriteErrorKey = attribute.Key("http.write_error") // if an error occurred while writing a reply, the string of the error (io.EOF is not recorded)
  19  )
  20  
  21  // Filter is a predicate used to determine whether a given http.request should
  22  // be traced. A Filter must return true if the request should be traced.
  23  type Filter func(*http.Request) bool
  24  
  25  func newTracer(tp trace.TracerProvider) trace.Tracer {
  26  	return tp.Tracer(ScopeName, trace.WithInstrumentationVersion(Version()))
  27  }
  28