jQuery POST, Error 405 Method not allowed

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A 405 is thrown by IIS when an HTTP verb(GET,PUT,POST,DELETE,HEAD,etc.) is requested and is not supported/disallowed by the designated handler.

You’ll need to open the IIS manager -> Default Web Site -> Handler Mappings (Or the handler mappings specific to your web-application)

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In here you’ll need to play with the handler mappings as one of them is not allowing “POST” verbs.

As you are not posting to any specific page (.aspx, .ashx, etc.), it will be difficult to identify the exact handler that is causing you issues.

Handlers of interest may be:

  • ExtensionlessUrlHandler-ISAPI-4.0_32bit /64bit
  • StaticFile

Once you identify the handler your request is being routed to, double click it to open the dialogue.

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From there click “Request Restrictions” then “Verbs”

Make sure the appropriate verb is present in the text area.

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As I mentioned before, I’m not sure which handler is handling your request as you are not posting to any particular page (you may have URL re-writing in place that is routing your request appropriately).

If the above fails, you may need to check if WebDAV Publishing is installed and remove it (restart required).

WebDAV

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