Version Packages (#1152)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

packages/otel/CHANGELOG.md

@@ -1,5 +1,11 @@
 # @hono/otel
 
+## 0.2.0
+
+### Minor Changes
+
+- [#1151](https://github.com/honojs/middleware/pull/1151) [`414f0a6c9502de4135d50a4f80698a8d2f09a81d`](https://github.com/honojs/middleware/commit/414f0a6c9502de4135d50a4f80698a8d2f09a81d) Thanks [@nrdobie](https://github.com/nrdobie)! - Added support for W3C Trace Context format
+
 ## 0.1.1
 
 ### Patch Changes

packages/otel/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@hono/otel",
-  "version": "0.1.1",
+  "version": "0.2.0",
   "description": "OpenTelemetry middleware for Hono",
   "type": "module",
   "module": "dist/index.js",

packages/otel/src/index.ts

@@ -1,5 +1,5 @@
 import type { TracerProvider } from '@opentelemetry/api'
-import { SpanKind, SpanStatusCode, trace } from '@opentelemetry/api'
+import { SpanKind, SpanStatusCode, trace, context, propagation } from '@opentelemetry/api'
 import {
   ATTR_HTTP_REQUEST_HEADER,
   ATTR_HTTP_REQUEST_METHOD,
@@ -42,6 +42,12 @@ export const otel = <E extends Env = any, P extends string = any, I extends Inpu
   const tracerProvider = options.tracerProvider ?? trace.getTracerProvider()
   const tracer = tracerProvider.getTracer(PACKAGE_NAME, PACKAGE_VERSION)
   return createMiddleware<E, P, I>(async (c, next) => {
+    // Handle propagation of trace context from a request using the W3C Trace Context format
+    let activeContext = context.active()
+    if (c.req.header('traceparent')) {
+      activeContext = propagation.extract(context.active(), c.req.header())
+    }
+
     const routePath = c.req.routePath
     await tracer.startActiveSpan(
       `${c.req.method} ${c.req.routePath}`,
@@ -53,6 +59,7 @@ export const otel = <E extends Env = any, P extends string = any, I extends Inpu
           [ATTR_HTTP_ROUTE]: routePath,
         },
       },
+      activeContext,
       async (span) => {
         for (const [name, value] of Object.entries(c.req.header())) {
           span.setAttribute(ATTR_HTTP_REQUEST_HEADER(name), value)