How to Use Font Awesome from Webjars.org with JSF and Resolve Font File Issues?

Using Font Awesome from Webjars.org with JSF

When incorporating Font Awesome icons into a JSF application, leveraging the pre-made JAR from the Webjars project offers a convenient solution. However, this process can present challenges in resolving font files referenced by the included CSS.

Initially, using the following syntax should render the icons correctly:

<h:outputStylesheet library="webjars" 
                    name="font-awesome/3.2.1/css/font-awesome.css"  />

However, if the browser console shows errors indicating that referenced font files cannot be found, it's likely due to missing JSF mapping information in the URLs. The correct URLs should include the FacesServlet mapping and library name:

GET http://DOMAIN:PORT/CONTEXT-ROOT/javax.faces.resource/font-awesome/3.2.1/font/fontawesome-webfont.woff.xhtml?ln=webjars&v=3.2.1

Since editing the source code is typically not feasible, utilizing the UnmappedResourceHandler provided by the OmniFaces JSF utility library can address this issue. To employ this solution, follow these steps:

1. Add the OmniFaces dependency to your Maven configuration.
2. Register the UnmappedResourceHandler in faces-config.xml.
3. Map /javax.faces.resource/* to the FacesServlet, assuming it's named facesServlet.
4. Move the library name from the output stylesheet's library attribute to the name attribute:

<h:outputStylesheet name="webjars/font-awesome/3.2.1/css/font-awesome.css" />

By incorporating these steps, you can successfully integrate Font Awesome icons from Webjars.org into your JSF application, ensuring that both the CSS file and referenced font files are resolved correctly.

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