/opt/canhelp/node_modules/next/dist/server
Edit: /opt/canhelp/node_modules/next/dist/server/pipe-readable.js.map (7677B)
{"version":3,"sources":["../../src/server/pipe-readable.ts"],"sourcesContent":["import type { ServerResponse } from 'node:http'\n\nimport {\n ResponseAbortedName,\n createAbortController,\n} from './web/spec-extension/adapters/next-request'\nimport { DetachedPromise } from '../lib/detached-promise'\nimport { getTracer } from './lib/trace/tracer'\nimport { NextNodeServerSpan } from './lib/trace/constants'\nimport { getClientComponentLoaderMetrics } from './client-component-renderer-logger'\n\nexport function isAbortError(e: any): e is Error & { name: 'AbortError' } {\n return e?.name === 'AbortError' || e?.name === ResponseAbortedName\n}\n\nfunction createWriterFromResponse(\n res: ServerResponse,\n waitUntilForEnd?: Promise
\n): WritableStream {\n let started = false\n\n // Create a promise that will resolve once the response has drained. See\n // https://nodejs.org/api/stream.html#stream_event_drain\n let drained = new DetachedPromise()\n function onDrain() {\n drained.resolve()\n }\n res.on('drain', onDrain)\n\n // If the finish event fires, it means we shouldn't block and wait for the\n // drain event.\n res.once('close', () => {\n res.off('drain', onDrain)\n drained.resolve()\n })\n\n // Create a promise that will resolve once the response has finished. See\n // https://nodejs.org/api/http.html#event-finish_1\n const finished = new DetachedPromise()\n res.once('finish', () => {\n finished.resolve()\n })\n\n // Create a writable stream that will write to the response.\n return new WritableStream({\n write: async (chunk) => {\n // You'd think we'd want to use `start` instead of placing this in `write`\n // but this ensures that we don't actually flush the headers until we've\n // started writing chunks.\n if (!started) {\n started = true\n\n if (\n 'performance' in globalThis &&\n process.env.NEXT_OTEL_PERFORMANCE_PREFIX\n ) {\n const metrics = getClientComponentLoaderMetrics()\n if (metrics) {\n performance.measure(\n `${process.env.NEXT_OTEL_PERFORMANCE_PREFIX}:next-client-component-loading`,\n {\n start: metrics.clientComponentLoadStart,\n end:\n metrics.clientComponentLoadStart +\n metrics.clientComponentLoadTimes,\n }\n )\n }\n }\n\n res.flushHeaders()\n getTracer().trace(\n NextNodeServerSpan.startResponse,\n {\n spanName: 'start response',\n },\n () => undefined\n )\n }\n\n try {\n const ok = res.write(chunk)\n\n // Added by the `compression` middleware, this is a function that will\n // flush the partially-compressed response to the client.\n if ('flush' in res && typeof res.flush === 'function') {\n res.flush()\n }\n\n // If the write returns false, it means there's some backpressure, so\n // wait until it's streamed before continuing.\n if (!ok) {\n await drained.promise\n\n // Reset the drained promise so that we can wait for the next drain event.\n drained = new DetachedPromise()\n }\n } catch (err) {\n res.end()\n throw new Error('failed to write chunk to response', { cause: err })\n }\n },\n abort: (err) => {\n if (res.writableFinished) return\n\n res.destroy(err)\n },\n close: async () => {\n // if a waitUntil promise was passed, wait for it to resolve before\n // ending the response.\n if (waitUntilForEnd) {\n await waitUntilForEnd\n }\n\n if (res.writableFinished) return\n\n res.end()\n return finished.promise\n },\n })\n}\n\nexport async function pipeToNodeResponse(\n readable: ReadableStream,\n res: ServerResponse,\n waitUntilForEnd?: Promise\n) {\n try {\n // If the response has already errored, then just return now.\n const { errored, destroyed } = res\n if (errored || destroyed) return\n\n // Create a new AbortController so that we can abort the readable if the\n // client disconnects.\n const controller = createAbortController(res)\n\n const writer = createWriterFromResponse(res, waitUntilForEnd)\n\n await readable.pipeTo(writer, { signal: controller.signal })\n } catch (err: any) {\n // If this isn't related to an abort error, re-throw it.\n if (isAbortError(err)) return\n\n throw new Error('failed to pipe response', { cause: err })\n 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