How do I get the VIEWSTATE of POST?

encountered a very contradictory problem, I have a website need to crawl it, using POST mode, the form contains VIEWSTATE, now the problem is that the browser query can see VIEWSTATE, but how do I know in advance with the code?

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Jun.17,2022

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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-64f5-1c13293-32e41.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1c13293-32e41.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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