http.request.method attribute value in HttpClient and ASP.NET Core

[vishweshbankwar]

Bug Report

http.request.method attribute value is set as it is from the original method with which the request was sent/received. This is incorrect. Specification only allows known verbs to be set as http.request.method . Any unknown method MUST be set as _OTHER.

Spec reference

When the method does not match one of the known verbs then http.request.method_original should be set on spans only.

Support for OTEL_INSTRUMENTATION_HTTP_KNOWN_METHODS will not be added in initial release to keep the experience consistent between NET8.0 and lower versions. .NET8.0 metrics does not provide this extensibility.

[vishweshbankwar]

closing this opened open-telemetry/opentelemetry-dotnet-contrib#1731 to track OTEL_INSTRUMENTATION_HTTP_KNOWN_METHODS