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I am getting this error when my payment gateway is redirecting user to my react application. Same code works on firebase hosting and doesn't give the error. Redirection url is a POST request

I tried various solutions from Asp.NET Web API - 405 - HTTP verb used to access this page is not allowed - how to set handler mappings

removed WebDav

jps
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Kiran Mohare
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2 Answers2

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Assuming there is no CORS issue here.

The issue is the call back to your site is a Post request along with data. Client application's index.html hosted inside IIS is not able to understand how to handle a post request to a html page. You will have to specifically make an entry in Handler Mapping section of IIS configurations.

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Inside Request Restrictions add the HTTP Methods you want it for or allow all verbs if it is a specific case.

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Or you can directly put it in your web.config with what all verbs you want to allow, as in below snippet

    <add name="html" path="*.html" verb="*" modules="IsapiModule" scriptProcessor="%windir%\system32\inetsrv\asp.dll" resourceType="Unspecified" requireAccess="None" />
Manish
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On the Request Filtering page, switch to the "HTTP Verbs" tab - if you see that "POST" has "Allowed" set to False, this is the cause. Remove this entry or changing it to explicitly be allowed will fix the issue.

samwu
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