iis express gzip

  1. Enable Static Content Compression: To enable Gzip compression in IIS Express, you need to add the following code to the web.config file:
<system.webServer>
  <urlCompression doStaticCompression="true" />
</system.webServer>
  1. Configure IIS Express to Use Gzip Compression: Next, you need to modify the applicationhost.config file to configure IIS Express to use Gzip compression. Open the file located at %userprofile%\documents\IISExpress\config\applicationhost.config and find the <httpCompression> element.
<httpCompression>
  <dynamicTypes>
    <add mimeType="text/*" enabled="true" />
    <add mimeType="application/javascript" enabled="true" />
    <add mimeType="application/json" enabled="true" />
    <add mimeType="application/xml" enabled="true" />
    ...
  </dynamicTypes>
  <staticTypes>
    <add mimeType="text/*" enabled="true" />
    <add mimeType="application/javascript" enabled="true" />
    <add mimeType="application/json" enabled="true" />
    <add mimeType="application/xml" enabled="true" />
    ...
  </staticTypes>
</httpCompression>

Make sure that the enabled attribute is set to true for the desired MIME types.

  1. Test Gzip Compression: After making the necessary configuration changes, you can test whether Gzip compression is working correctly. You can use tools like Fiddler or browser developer tools to inspect the network traffic and check if the server is returning compressed responses.

  2. Verify Content-Encoding Header: When Gzip compression is enabled, the server should include the Content-Encoding: gzip header in the response. This header informs the client that the response is compressed and needs to be decompressed before it can be processed.

By following these steps, you should be able to enable and configure Gzip compression in IIS Express, resulting in compressed responses being sent to the clients, thereby improving the performance of your web application.