POST request not working when processed from frontend

[lezzowski1]

Hello there, I'm facing a strange issue when I try to make a POST request from my frontend(I'm currently using React, but i'm doing these requests from localhost:4502). I know for sure that the servlet it's working because when I do a POST request from Postman works correctly. When I do it from the frontend it gives me 403(Forbidden). Why it has different behaviour when I do the legit same things?
Info about servlet: 
Servlet temporary binded to /bin/vendorname/utils

[Nitin_laad]

You should check CORS configuration, check the allowed method types,

Allowed Methods

• "supportedmethods"
• List of method parameters indicating which HTTP methods can be used when making the actual request.

Understand Cross-Origin Resource Sharing (CORS) with AEM | Adobe Experience Manager

[lezzowski1]

Thank you for your answer @Nitin_laad 
Currently my cors settings are:
allowedorigins: "http://localhost:3000"
allowedmethods(supportedmethods): ["GET", "POST", "HEAD"]

supportedheaders: [ "Authorization", "Origin", "Accept", "X-Requested-With", "Content-Type", "Access-Control-Request-Method", "Access-Control-Request-Headers"]

[Manu_Mathew_]

@lezzowski1 You may have to remove the POST value from the filter in  "Apache Sling Referrer Filter" and "Adobe Granite CSRF Filter" configuration - http://localhost:4502/system/console/configMgr

[SantoshSai]

Hi @lezzowski1 ,

Please refer similar query here: https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/page-not-redirecting-on-fo...

Hope that helps!

Regards,

Santosh

[arunpatidar]

hi,

You need to pass the authentication(credentials with post request) since it is Author.

Try in publish instance, it should work.

[lezzowski1]

Good news, my servlet is currently working while binded on path but if I try to bind it on a component with SlingServletResourceTypes my request status code is 200 but it does nothing. It just says Content Modified or something similar instead of my json. Any thoughts?

[arunpatidar]

Can you share, how did you registered the servlet.

Better to use selector to avoid resolution of default post servlet.

[lezzowski1]

Seems like the problem was this one: I wasn't setting "methods = "POST" " in the decorator. I'm kinda shocked because why should the servlet work as intended when binded to path (and I didn't explicitly set "methods = POST") but not when binded to component? It's totally crazy