Under the https protocol, the post request is cross-domain, but the get request is not.

under the https protocol, the post request is cross-domain, the get request is not cross-domain, and the http protocol is fine.

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Https ajax-cross-domain php
Mar.04,2021

PHP Code: 

  http://localhost:3000");


 header ("Access-control-Allow-Origin:*"); 


 / / the response header is set to ajax submission 


 header ("Access-Control-Allow-Headers:X-Requested-With"); 


 / / allow to carry user authentication credentials (that is, allow requests sent by the client to carry Cookie) 


 header ("Access-Control-Allow-Credentials:true"); 


 write to the inside of the method

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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-64f5-1be9852-319a0.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1be9852-319a0.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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