Mish Ushakov
c1415f3ec7
Follow-up to #1433. Builds on the shared streaming infrastructure introduced there (`FILE_TIMEOUT_MS`, request-controller/stream-cleanup helpers in `connectionConfig`, `io_utils` chunk iterators, the `runtime` guard) and applies the same streaming model to volumes. > [!NOTE] > Based on `mishushakov/stream-write-file-upload` (#1433). Merge that PR first; this PR's diff will then retarget to `main` automatically. ## What changed - **`Volume.writeFile()` / `Volume.write_file()`** — stream the request body instead of buffering it in memory. - JS: `ReadableStream` data is streamed outside the browser (half-duplex); browsers still buffer since they can't stream request bodies. - Python: file-like objects are streamed in chunks (async wraps them in an async iterator; sync passes them to httpx directly, text-mode IO is encoded chunk-by-chunk). - **`Volume.readFile(format="stream")` / `read_file(format="stream")`** — the request timeout now bounds only the initial handshake, not the body read, matching the sandbox `files.read` stream path. A dropped connection during the handshake surfaces the same typed, health-checked error; JS supports `signal` to cancel an in-flight stream and cancels unconsumed bodies on error so the pooled connection is released. ## Usage JS — stream a file straight to a volume without buffering: ```ts import { createReadStream } from 'node:fs' import { Readable } from 'node:stream' const stream = Readable.toWeb(createReadStream('large-input.bin')) await volume.writeFile('/data/large-input.bin', stream) // read back as a stream; the body lives until consumed/cancelled const out = await volume.readFile('/data/large-input.bin', { format: 'stream' }) for await (const chunk of out) { // process chunk } ``` Python — stream a file-like object: ```python with open("large-input.bin", "rb") as f: volume.write_file("/data/large-input.bin", f) # streamed, not read() into memory for chunk in volume.read_file("/data/large-input.bin", format="stream"): ... # process chunk ``` ## Testing - `pnpm run format`, `pnpm run lint`, `pnpm run typecheck` pass. - Added volume streaming tests (JS `tests/volume/file.test.ts`; Python sync/async `test_file.py` text-stream cases). 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
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