[Factory Configuration] How To - Add Mime Types to an app (web.config manipulation)
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Forge component by Stoyan Garbatov

Within OutSystems Cloud, unfortunately, isn't possible to access the IIS directly. Even when you need to change some simple configurations, like adding a specific header to the web.config file or increase the IIS limits to upload files. However, using a powerful tool available for everyone within forge (Factory Configuration) we are allowed to manipulate and include that so much required headers in the web file config.  


1 - Download and Install on your environment the Forge component "Factory Configuration" (https://www.outsystems.com/forge/component-overview/25/factory-configuration)

2 - Open the page https://<Environment_URL>/FactoryConfiguration in a browser and log in using Service Center Credentials.

3 - Click on "Shared Configuration" > "Create New Shared Configuration"

4 - Add a meaningful "Name" to the configuration and add the XSLT template to the "Value" input by clicking the button "FILL"

5 - Look for and replace the two following lines:

<xsl:attribute name="executionTimeout">180</xsl:attribute>
<xsl:attribute name="maxRequestLength">65536</xsl:attribute>

with the mime types that you want to add:

     <mimeMap fileExtension=".xod" mimeType="application/octet-stream" />
     <mimeMap fileExtension=".res" mimeType="application/octet-stream" />
     <mimeMap fileExtension=".mem" mimeType="application/octet-stream" />
     <mimeMap fileExtension=".wasm" mimeType="application/wasm" />
     <mimeMap fileExtension=".nmf" mimeType="application/octet-stream" />

afterward, search for the following line:

<xsl:template match="/configuration/system.web/httpRuntime">

and replace with:

<xsl:template match="/configuration/system.webServer">

6 - Click on tab "eSpaces" > search for the module that you want to change the headers > check the modules you want to add the configuration and click "Associate Shared Configuration"

7 - After finishing the steps above, don't forget to REPUBLISH your module.

8 - After republishing the module you should be able to use files with the mime types that you added.

Keep in mind that adding a mime type that already exists will result in the following error when publishing the application in the Service Center:

Hi Adriano,

Great post regarding Mime Types.

One thing I would like to add here is that if a specific extension is already defined, it is still possible to rewrite it by first removing the mapping.

To do that, there is the need to add the following entry before the mimeMap:

<remove fileExtension=".js" />

(This example is for Javascript extension files)


Hi, Adriano Alberto Borges Ramos,

after adding mimetype through factory configuration

i m unable to publish the module

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