asepharyana
d296e0ebcf
Root cause of '400: Bad Request: there is no document in the request' on chunked uploads of compressible files (MP4, zip, text, etc.): Bun.gzipSync() returns a plain Uint8Array, NOT a Buffer. Telegraf (sendDocument/sendVideo) only recognises Buffer/Blob/stream sources as file uploads — a plain Uint8Array produces an empty multipart body and Telegram rejects the request. Verified via isolated forwardToStorage probes: - raw Buffer chunk (.bin, MP4) -> OK - plain Uint8Array chunk -> FAIL: there is no document - Buffer.from(gzip) chunk -> OK (after fix) - .gz extension on Uint8Array did NOT help (rules out MIME/extension) This only affected chunked uploads of compressible files; incompressible files (random .bin) worked by accident because gzip didn't shrink them so the raw Buffer was forwarded unchanged.
39 lines
1.5 KiB
TypeScript
39 lines
1.5 KiB
TypeScript
/** Compression algorithm for chunked file storage. */
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export type CompressionAlgorithm = 'gzip' | null;
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/**
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* Optionally compress a chunk with gzip.
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*
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* Compression is skipped if:
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* - The `compress` flag is false.
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* - The chunk is smaller than `compressionMinSizeBytes`.
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* - The compressed result is larger than the original.
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*
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* @param chunk - The raw chunk buffer.
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* @param compress - Whether compression is enabled.
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* @param compressionMinSizeBytes - Minimum chunk size to attempt compression.
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* @returns The (possibly compressed) bytes and the algorithm used.
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*/
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export const maybeCompressChunk = (
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chunk: Buffer,
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compress: boolean,
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compressionMinSizeBytes: number,
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): { bytes: Buffer; compressionAlgorithm: CompressionAlgorithm } => {
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if (!compress || chunk.byteLength < compressionMinSizeBytes) {
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return { bytes: chunk, compressionAlgorithm: null };
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}
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const gzipped = Bun.gzipSync(chunk as Uint8Array<ArrayBuffer>);
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if (gzipped.byteLength >= chunk.byteLength) {
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return { bytes: chunk, compressionAlgorithm: null };
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}
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// CRITICAL: Bun.gzipSync returns a plain Uint8Array, NOT a Buffer.
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// Telegraf (telegram.sendDocument) only recognises Buffer/Blob/stream
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// sources as file uploads — a plain Uint8Array yields an empty multipart
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// body and Telegram rejects with "400: there is no document in the request".
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// Wrap in Buffer.from(...) so chunked uploads of compressible files (MP4,
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// zip, text, etc.) actually work.
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return { bytes: Buffer.from(gzipped), compressionAlgorithm: 'gzip' };
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};
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