otel_dio 0.2.0

OpenTelemetry instrumentation for `package:dio`. An Interceptor that wraps each request in a CLIENT-kind span, sets HTTP semconv attributes and injects W3C trace-context headers.

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

0.2.0 - 2026-08-09

Changed

• Semantic conventions updated to the current OTel registry; no deprecated attribute keys are emitted (only the current http.request.method, never the legacy http.method).
• Dependency floors raised to dartastic_opentelemetry ^1.1.0-beta.12 and dartastic_opentelemetry_api ^1.0.0-rc.1. The previous floors declared compatibility with API versions that predate the semconv enums this package uses and could not actually resolve-and-compile.
• repository URL corrected to the canonical Dartastic org casing so pub.dev repository verification succeeds.
• Attribute keys migrated to the rc.1 semconv enum member names (Http.httpRequestMethod, Server.serverAddress, ErrorAttributes.errorType, ...); emitted keys are unchanged.

Added

• Deduplication guard: a second OTelDioInterceptor in the same chain now defers to the first (previously the first span was silently overwritten in RequestOptions.extra and never ended). The stashed span is also removed on completion so retries re-entering the chain get a fresh span. Documented the cross-layer contract: the layer closest to the application wins; transport-layer instrumentation should suppress when W3C traceparent is already present at send time.
• ignoreUrlPatterns — URL patterns (substring or RegExp) excluded from instrumentation entirely (no span, no header injection), e.g. telemetry-upload endpoints.
• OTelDioInterceptor — a package:dio Interceptor that wraps every request in a CLIENT-kind span, sets HTTP semantic-convention attributes (http.request.method, url.full, url.scheme, url.path, url.query, server.address, server.port, http.response.status_code, http.request.body.size, http.response.body.size, user_agent.original), and injects W3C traceparent / tracestate / baggage headers so downstream OTel services join the same trace.
• 4xx and 5xx responses flip the span status to Error; transport failures (timeouts, connection errors, cancellation) record the exception via recordException, set error.type to the underlying exception class, and end the span.
• Userinfo (https://user:pass@host) in the request URL is redacted from url.full per OTel HTTP-semconv guidance.
• Span name and body-size recording are configurable via constructor parameters (spanNameBuilder, recordRequestBodySize, recordResponseBodySize).