RestAPI - post method string size limitations

Good day, dear developers!

Can you please advice on next:

I have in-app purchases. I validate it using backend server. So once a purchase successfully done on iOS - I have a 4k+ string - hash code of the receipt that I need to sent to my backend server via RestAPI (POST method).
I can send this string from Editor (hardcoded hash), thats fine for Android as well, but on iOS platform it seems there is some limitation of json string I can send using POST method... ? the request just stuck and return code = 0 after half minute or so.

 

Thanks, I'm using Unity 2019.2.Alpha14 build. Will check what you propose and let you know within a day-two

 

yes, I changed one value from 1024 to 8192 and seems working now (and uncommented some things). From another side - for sure the fix will be included in 2019.2.f1 right ?

 

A 4K receipt? Is this a tester account perhaps with hundreds of purchases? Apple typically returns all receipts. Or does this happen on a new tester account with a single purchase?

 

4480 chars takes the hash-code string - single consumable purchase 1 product id by 1 user
then backend send this to receive information about the purchase (much smaller data) to Apple verification service/site. Sand-box mode.
I receive this string from Apple after test purchase successfully done and then my backend send it to https://sandbox.itunes.apple.com/verifyReceipt

in answers here you can see a sample of the looooong receipt string : )
https://stackoverflow.com/questions/33843281/apple-receipt-data-sample

I also tried to hardcode this string and send from Unity Editor and Android build - all is good there, the limitation is only on iOS build

 

Got it! Yes, I wasn't aware that it's so long