pub fn tracing_middleware() -> TracingMiddleware<SpanBackendWithUrl>Expand description
Returns a new tracing middleware which can be used with reqwest_middleware.
It will then write the traceparent in the header on the request and additionally records the
url into http.url.
If otlp feature is disabled, this will not insert a traceparent into the header. It will
basically function as a noop.
traceparent => https://www.w3.org/TR/trace-context/#trace-context-http-headers-format