The problem of downloading pictures on mobile

draw with canvas and convert it into picture format. The resulting url address is in base64 bit format. The download task created when downloading with a tag on the mobile terminal is an unknown format file, and the download is not successful. What do people do when dealing with the problem of downloading pictures on mobile devices?

Jan.23,2022

Code paste

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-64f5-1e63067-4d0fe.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e63067-4d0fe.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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