防止在页面加载时将后缀添加到资源中

防止在页面加载时将后缀添加到资源中

这是可行的具有自定义

ResourceHandler

它返回

createResource()

一个

Resource

这反过来又返回上一个“未映射”的URL

Resource#getRequestPath()

。您仅需要将默认的JSF资源前缀添加

/javax.faces.resource/*

到映射

<url-pattern>

列表中

FacesServlet

，以便无论如何都能触发它。

此外，您需要重写

isResourceRequest()

以检查URL是否以JSF资源前缀开头，并且还

handleResourceRequest()

需要定位和流传输正确的资源。

总而言之，这应该做到：

public class UnmappedResourceHandler extends ResourceHandlerWrapper {    private ResourceHandler wrapped;    public UnmappedResourceHandler(ResourceHandler wrapped) {        this.wrapped = wrapped;    }    @Override    public Resource createResource(final String resourceName, final String libraryName) {        final Resource resource = super.createResource(resourceName, libraryName);        if (resource == null) { return null;        }        return new ResourceWrapper() { @Override public String getRequestPath() {     ExternalContext externalContext = FacesContext.getCurrentInstance().getExternalContext();     String mapping = externalContext.getRequestServletPath();     if (externalContext.getRequestPathInfo() == null) {         mapping = mapping.substring(mapping.lastIndexOf('.'));     }     String path = super.getRequestPath();     if (mapping.charAt(0) == '/') {         return path.replaceFirst(mapping, "");     }     else if (path.contains("?")) {         return path.replace(mapping + "?", "?");     }     else {         return path.substring(0, path.length() - mapping.length());     } } @Override // Necessary because this is missing in ResourceWrapper (will be fixed in JSF 2.2). public String getResourceName() {     return resource.getResourceName(); } @Override // Necessary because this is missing in ResourceWrapper (will be fixed in JSF 2.2). public String getLibraryName() {     return resource.getLibraryName(); } @Override // Necessary because this is missing in ResourceWrapper (will be fixed in JSF 2.2). public String getContentType() {     return resource.getContentType(); } @Override public Resource getWrapped() {     return resource; }        };    }    @Override    public boolean isResourceRequest(FacesContext context) {        return ResourceHandler.RESOURCE_IDENTIFIER.equals(context.getExternalContext().getRequestServletPath());    }    @Override    public void handleResourceRequest(FacesContext context) throws IOException {        ExternalContext externalContext = context.getExternalContext();        String resourceName = externalContext.getRequestPathInfo();        String libraryName = externalContext.getRequestParameterMap().get("ln");        Resource resource = context.getApplication().getResourceHandler().createResource(resourceName, libraryName);        if (resource == null) { super.handleResourceRequest(context); return;        }        if (!resource.userAgentNeedsUpdate(context)) { externalContext.setResponseStatus(HttpServletResponse.SC_NOT_MODIFIED); return;        }        externalContext.setResponseContentType(resource.getContentType());        for (Entry<String, String> header : resource.getResponseHeaders().entrySet()) { externalContext.setResponseHeader(header.getKey(), header.getValue());        }        ReadableByteChannel input = null;        WritableByteChannel output = null;        try { input = Channels.newChannel(resource.getInputStream()); output = Channels.newChannel(externalContext.getResponseOutputStream()); for (ByteBuffer buffer = ByteBuffer.allocateDirect(10240); input.read(buffer) != -1; buffer.clear()) {     output.write((ByteBuffer) buffer.flip()); }        }        finally { if (output != null) try { output.close(); } catch (IOException ignore) {} if (input != null) try { input.close(); } catch (IOException ignore) {}        }    }    @Override    public ResourceHandler getWrapped() {        return wrapped;    }}

将其注册如下

faces-config.xml

：

<application>    <resource-handler>com.example.UnmappedResourceHandler</resource-handler></application>

通过以下方式扩展

FacesServlet

URL模式

ResourceHandler.RESOURCE_IDENTIFIER

：

<servlet-mapping>    <servlet-name>facesServlet</servlet-name>    <url-pattern>*.xhtml</url-pattern>    <url-pattern>/javax.faces.resource/*</url-pattern></servlet-mapping>