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How to fix Font Awesome 404 errors in JSF when using Webjars?

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Release: 2024-11-11 18:40:03
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How to fix Font Awesome 404 errors in JSF when using Webjars?

Accessing Font Awesome Resources in JSF using Webjars

Issue:

When attempting to include Font Awesome icons in a JSF application using the pre-built webjars JAR, font resources are not being found. Despite the CSS file being accessible, subsequent requests for font files result in 404 errors.

Solution:

To ensure proper mapping and resolution of font resources, follow these steps:

  1. Use JSF Resource URL:

    Modify the CSS file references to use #{resource}. This will instruct JSF to generate the correct resource URL, including the proper JSF library mapping:

    src: url("#{resource['webjars:font-awesome/3.2.1/font/fontawesome-webfont.eot']}&v=3.2.1");
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  2. Install OmniFaces:

    Add the OmniFaces dependency to your pom.xml:

    <dependency>
        <groupId>org.omnifaces</groupId>
        <artifactId>omnifaces</artifactId>
        <version><!-- Check omnifaces.org for current version. --></version>
    </dependency>
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  3. Register UnmappedResourceHandler:

    In faces-config.xml, register the OmniFaces UnmappedResourceHandler:

    <application>
        <resource-handler>org.omnifaces.resourcehandler.UnmappedResourceHandler</resource-handler>
    </application>
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  4. Update Servlet Mapping:

    In web.xml, include /javax.faces.resource/* in your FacesServlet mapping:

    <servlet-mapping>
        <servlet-name>facesServlet</servlet-name>
        <url-pattern>/javax.faces.resource/*</url-pattern>
        <url-pattern>*.xhtml</url-pattern>
    </servlet-mapping>
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  5. Move Library Name:

    In your h:outputStylesheet tag, move the library name into the resource name:

    <h:outputStylesheet name="webjars/font-awesome/3.2.1/css/font-awesome.css" />
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By implementing these steps, you can effectively access Font Awesome resources within your JSF application using the webjars JAR, ensuring the proper resolution of font files.

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