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Problem Statement
The otelhttp middleware is an ideal place to log HTTP transactions, because important data are available, such as:
Now that the minimal Go version is 1.21, in which the package log/slog is part of the standard library,
a standard API is available to generate structured log records.
OpenTelemetry loggers can be used with the log/slog API via go.opentelemetry.io/contrib/bridges/otelslog.
Proposed Solution
The middleware can optionally be configured with a *slog.Logger:
If a Logger has been configured, a log record will be emitted with the same attributes as the Span: