How to set the koa download file to "utf-8"

  ctx.set("Content-disposition", "attachment; filename=district.csv");
  ctx.set("content-type", "text/csv; charset=utf-8");
  ctx.statusCode = 200;
  ctx.body = csv;
  

set excel to open or garbled in this way

Mar.01,2021

what is your csv

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-64f5-1bc6924-4584c.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bc6924-4584c.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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