Package org.omnifaces.resourcehandler

Class SourceMapResourceHandler

java.lang.Object

jakarta.faces.application.ResourceHandler

jakarta.faces.application.ResourceHandlerWrapper

org.omnifaces.resourcehandler.DefaultResourceHandler

org.omnifaces.resourcehandler.SourceMapResourceHandler

All Implemented Interfaces:

FacesWrapper<ResourceHandler>

public class SourceMapResourceHandler
extends DefaultResourceHandler

This ResourceHandler implementation will set the SourceMap response header with the correctly mapped request path to any discovered source map of any CSS and JS resource.

By default, CSS and JS minifiers will embed the path to the source map in a comment like as the below one in our own omnifaces.js.

 //# sourceMappingURL=omnifaces.js.map
 

The web browser will then attempt to resolve this against the current request URL, but this would fail with a 404 error because the Faces mapping such as *.xhtml is missing.

In order to sovle that, first configure your minifier to disable writing the # sourceMappingURL comment, otherwise that would still take precedence over the SourceMap response header, and register the SourceMapResourceHandler in faces-config.xml as below.

 <application>
     <resource-handler>org.omnifaces.resourcehandler.SourceMapResourceHandler</resource-handler>
 </application>
 

By default, the SourceMapResourceHandler will use *.map pattern to create the source map URL. In other words, it's expected that the source map file is located in exactly the same folder and has the .map extension. In case you need a different pattern, e.g. sourcemaps/*.map, then you can set that via the "org.omnifaces.SOURCE_MAP_RESOURCE_HANDLER_PATTERN" context parameter.

 <context-param>
     <param-name>org.omnifaces.SOURCE_MAP_RESOURCE_HANDLER_PATTERN</param-name>
     <param-value>sourcemaps/*.map</param-value>
 </context-param>
 

Note that the SourceMap response header will only be set when the target source map file actually exists.

Since:

3.1

Author:

Bauke Scholtz

Field Summary

Fields

Modifier and Type	Field	Description
static String	PARAM_NAME_SOURCE_MAP_PATTERN	The context parameter name to configure the source map pattern.

Fields inherited from class org.omnifaces.resourcehandler.DefaultResourceHandler

FACES_SCRIPT_RESOURCE_NAME, RES_NOT_FOUND

Fields inherited from class jakarta.faces.application.ResourceHandler

JSF_SCRIPT_LIBRARY_NAME, JSF_SCRIPT_RESOURCE_NAME, LOCALE_PREFIX, RESOURCE_CONTRACT_XML, RESOURCE_EXCLUDES_DEFAULT_VALUE, RESOURCE_EXCLUDES_PARAM_NAME, RESOURCE_IDENTIFIER, WEBAPP_CONTRACTS_DIRECTORY_PARAM_NAME, WEBAPP_RESOURCES_DIRECTORY_PARAM_NAME

Constructor Summary

Constructors

Constructor	Description
SourceMapResourceHandler(ResourceHandler wrapped)	Creates a new instance of this source map resource handler which wraps the given resource handler.

Method Summary

Modifier and Type	Method	Description
Resource	decorateResource(Resource resource, String resourceName, String libraryName)	Decorate the given resource.

Methods inherited from class org.omnifaces.resourcehandler.DefaultResourceHandler

createResource, createResource, createResource, createResourceFromLibrary, decorateResource, getLibraryName

Methods inherited from class jakarta.faces.application.ResourceHandlerWrapper

createResourceFromId, createViewResource, getRendererTypeForResourceName, getViewResources, getViewResources, getWrapped, handleResourceRequest, isResourceRendered, isResourceRequest, isResourceURL, libraryExists, markResourceRendered

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

PARAM_NAME_SOURCE_MAP_PATTERN

public static final String PARAM_NAME_SOURCE_MAP_PATTERN

The context parameter name to configure the source map pattern.

See Also:

Constant Field Values

Constructor Detail

SourceMapResourceHandler

public SourceMapResourceHandler(ResourceHandler wrapped)

Creates a new instance of this source map resource handler which wraps the given resource handler. This will also initialize the source map pattern based on the context parameter.

Parameters:

wrapped - The resource handler to be wrapped.

Method Detail

decorateResource

public Resource decorateResource(Resource resource,
                                 String resourceName,
                                 String libraryName)

Description copied from class: DefaultResourceHandler

Decorate the given resource. This will only be called if no library-specific resource has been requested.

The default implementation delegates to DefaultResourceHandler.decorateResource(Resource).

Overrides:

decorateResource in class DefaultResourceHandler

Parameters:

resource - The resource to be decorated.

resourceName - The resource name.

libraryName - The library name.

Returns:

The decorated resource.