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Instrument HTTP request end-to-end #211

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Instrument HTTP request end-to-end #211

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19 changes: 16 additions & 3 deletions src/instrumentation/fetch.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -196,13 +196,26 @@ export function instrumentClientFetch(
if (request.cf) span.setAttributes(gatherOutgoingCfAttributes(request.cf))
const response = await Reflect.apply(target, thisArg, [request])
span.setAttributes(gatherResponseAttributes(response))
return response

if (!response.body) {
span.end()
return response
}

const transformer = new TransformStream({
transform(chunk, controller) {
controller.enqueue(chunk)
},
flush() {
span.end()
},
})
return new Response(response.body.pipeThrough(transformer), response)
} catch (error: unknown) {
span.recordException(error as Exception)
span.setStatus({ code: SpanStatusCode.ERROR })
throw error
} finally {
span.end()
throw error
}
})
return promise
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