Tips for including MIME type in headers

Everything was running smoothly with my C# web application.

However, to enhance security measures, I decided to add the "nosniff" custom header in the web.config file.

 <system.webServer>
    </handlers>
      <httpProtocol>
          <customHeaders>
              <add name="X-Content-Type-Options" value="nosniff" />
          </customHeaders>
      </httpProtocol>
  </system.webServer>

Unfortunately, this change caused the application to break and display nothing. Upon checking the browser, I received the following message:

Refused to execute script from 'https://localhost:003/extnet-ini-js/ext.axd?' because its MIME type ('application/json') is not executable and strict MIME type checking is enabled.

The issue lies with the extnet server-based library that I am using.

Being a server-based asp.net library, I am unsure how to include MIME type in headers. Is there any solution to this problem?

javascriptasp.net

Answer №1

As per this reference: Ensure to include all necessary Mime types in your Backend application's web.config file.

<system.webServer>
    <staticContent>
        <remove fileExtension=".7z" />
        <mimeMap fileExtension=".7z" mimeType="application/x-7z-compressed" />
    </staticContent>
</system.webServer>

Adding all required types has proven beneficial for me before, I hope it helps you as well.

For a comprehensive list of common MIME types that can be utilized, refer to:
https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types/Common_types

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