public static String calculateResourceBasePath(FacesContext facesContext) {
FacesServletMapping mapping = getFacesServletMapping(facesContext);
ExternalContext externalContext = facesContext.getExternalContext();
if (mapping != null) {
String resourceBasePath = null;
if (mapping.isExtensionMapping()) {
// Mapping using a suffix. In this case we have to strip
// the suffix. If we have a url like:
// http://localhost:8080/testjsf20/javax.faces.resource/imagen.jpg.jsf?ln=dojo
//
// The servlet path is /javax.faces.resource/imagen.jpg.jsf
//
// For obtain the resource name we have to remove the .jsf
// suffix and
// the prefix ResourceHandler.RESOURCE_IDENTIFIER
resourceBasePath = externalContext.getRequestServletPath();
int stripPoint = resourceBasePath.lastIndexOf('.');
if (stripPoint > 0) {
resourceBasePath = resourceBasePath.substring(0, stripPoint);
}
} else {
// Mapping using prefix. In this case we have to strip
// the prefix used for mapping. If we have a url like:
// http://localhost:8080/testjsf20/faces/javax.faces.resource/imagen.jpg?ln=dojo
//
// The servlet path is /faces
// and the path info is /javax.faces.resource/imagen.jpg
//
// For obtain the resource name we have to remove the /faces
// prefix and
// then the prefix ResourceHandler.RESOURCE_IDENTIFIER
resourceBasePath = externalContext.getRequestPathInfo();
}
return resourceBasePath;
} else {
// If no mapping is detected, just return the
// information follows the servlet path but before
// the query string
return externalContext.getRequestPathInfo();
}
}
public static FacesServletMapping getFacesServletMapping(final FacesContext facesContext) {
Map<Object, Object> attributes = facesContext.getAttributes();
// Has the mapping already been determined during this request?
FacesServletMapping mapping =
(FacesServletMapping) attributes.get(FacesServletMapping.CACHED_SERVLET_MAPPING);
if (mapping == null) {
ExternalContext externalContext = facesContext.getExternalContext();
mapping =
FacesServletMapping.calculateFacesServletMapping(
externalContext.getRequestServletPath(), externalContext.getRequestPathInfo());
attributes.put(FacesServletMapping.CACHED_SERVLET_MAPPING, mapping);
}
return mapping;
}