13 lines
684 B
Markdown
13 lines
684 B
Markdown
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### Note on Streaming Read
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The most common and interesting formats (XLS, XLSX/M, XLSB, ODS) are ultimately
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ZIP or CFB containers of files. Neither format puts the directory structure at
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the beginning of the file: ZIP files place the Central Directory records at the
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end of the logical file, while CFB files can place the FAT structure anywhere in
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the file! As a result, to properly handle these formats, a streaming function
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would have to buffer the entire file before commencing. That belies the
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expectations of streaming, so we do not provide any streaming read API. If you
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really want to stream, there are node modules like `concat-stream` that will do
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the buffering for you.
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