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