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1 lines
6.0 KiB
1 lines
6.0 KiB
{"ast":null,"code":"export const streamChunk = function* (chunk, chunkSize) {\n let len = chunk.byteLength;\n if (!chunkSize || len < chunkSize) {\n yield chunk;\n return;\n }\n let pos = 0;\n let end;\n while (pos < len) {\n end = pos + chunkSize;\n yield chunk.slice(pos, end);\n pos = end;\n }\n};\nexport const readBytes = async function* (iterable, chunkSize) {\n for await (const chunk of readStream(iterable)) {\n yield* streamChunk(chunk, chunkSize);\n }\n};\nconst readStream = async function* (stream) {\n if (stream[Symbol.asyncIterator]) {\n yield* stream;\n return;\n }\n const reader = stream.getReader();\n try {\n for (;;) {\n const {\n done,\n value\n } = await reader.read();\n if (done) {\n break;\n }\n yield value;\n }\n } finally {\n await reader.cancel();\n }\n};\nexport const trackStream = (stream, chunkSize, onProgress, onFinish) => {\n const iterator = readBytes(stream, chunkSize);\n let bytes = 0;\n let done;\n let _onFinish = e => {\n if (!done) {\n done = true;\n 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chunkSize);\n }\n}\n\nconst readStream = async function* (stream) {\n if (stream[Symbol.asyncIterator]) {\n yield* stream;\n return;\n }\n\n const reader = stream.getReader();\n try {\n for (;;) {\n const {done, value} = await reader.read();\n if (done) {\n break;\n }\n yield value;\n }\n } finally {\n await reader.cancel();\n }\n}\n\nexport const trackStream = (stream, chunkSize, onProgress, onFinish) => {\n const iterator = readBytes(stream, chunkSize);\n\n let bytes = 0;\n let done;\n let _onFinish = (e) => {\n if (!done) {\n done = true;\n onFinish && onFinish(e);\n }\n }\n\n return new ReadableStream({\n async pull(controller) {\n try {\n const {done, value} = await iterator.next();\n\n if (done) {\n _onFinish();\n controller.close();\n return;\n }\n\n let len = value.byteLength;\n if (onProgress) {\n let loadedBytes = bytes += len;\n onProgress(loadedBytes);\n }\n controller.enqueue(new Uint8Array(value));\n } catch (err) {\n _onFinish(err);\n throw err;\n }\n },\n cancel(reason) 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