Ajax sends and receives stream files

there is a requirement. I post an excel file to the backend interface, and the
backend returns me a stream file of excel
can it be realized? I used new Blob () to convert the returned stream file but failed. Is the front end unable to send and receive the file stream on the same interface, or is there something wrong with my implementation? ask for advice.

Mar.09,2021

if the request received is of blob type and cannot be operated directly new Blob , use FileReader to read
something like this:

let reader = new FileReader()
reader.readAsArrayBuffer(<Your Blob Object>)
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b353f2-2bf90.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b353f2-2bf90.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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