ro.isdc.wro.http.handler

Class ResourceProxyRequestHandler

java.lang.Object

ro.isdc.wro.http.handler.RequestHandlerSupport

ro.isdc.wro.http.handler.ResourceProxyRequestHandler

All Implemented Interfaces:

RequestHandler

public class ResourceProxyRequestHandler
extends RequestHandlerSupport

Provides access to wro resources via a resource proxy. This request handler accepts the following uri:

 ?wroAPI=wroResources?id=/path/to/resourceId.js
 

Notice that this uri has the following mandatory parameters:

• wroAPI - having the 'wroResources' value
• id - the id of the proxy resource

Since:

1.4.7

Author:

Ivar Conradi Østhus

Field Summary

Fields

Modifier and Type	Field and Description
static String	ALIAS The alias of this RequestHandler used for configuration.
static String	PARAM_RESOURCE_ID
static String	PATH_RESOURCES

Fields inherited from class ro.isdc.wro.http.handler.RequestHandlerSupport

PATH_API

Constructor Summary

Constructors

Constructor and Description
ResourceProxyRequestHandler()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	accept(javax.servlet.http.HttpServletRequest request) Determines if current request can be handled by this requestHandler
static String	createProxyPath(String requestUri, String resourceId) Builds the request path for this request handler using the assumption that WroFilter has a mapping ending with a * character.
void	handle(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Handle the given request, generating a response.
static boolean	isProxyUri(String url) Checks if the provided url is a resource proxy request.
protected boolean	isResourceChanged(javax.servlet.http.HttpServletRequest request) Used to identify whether the HttpServletResponse.SC_NOT_MODIFIED or HttpServletResponse.SC_OK should be returned.
protected ResponseHeadersConfigurer	newResponseHeadersConfigurer()

Methods inherited from class ro.isdc.wro.http.handler.RequestHandlerSupport

isEnabled

Methods inherited from class java.lang.Object

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

Field Detail

PARAM_RESOURCE_ID

public static final String PARAM_RESOURCE_ID

See Also:

Constant Field Values

PATH_RESOURCES

public static final String PATH_RESOURCES

See Also:

Constant Field Values

ALIAS

public static final String ALIAS

The alias of this RequestHandler used for configuration.

See Also:

Constant Field Values

Constructor Detail

ResourceProxyRequestHandler

public ResourceProxyRequestHandler()

Method Detail

handle

public void handle(javax.servlet.http.HttpServletRequest request,
          javax.servlet.http.HttpServletResponse response)
            throws IOException

Description copied from interface: RequestHandler

Handle the given request, generating a response.

Specified by:

handle in interface RequestHandler

Overrides:

handle in class RequestHandlerSupport

Parameters:

request - current HTTP request

response - current HTTP response

Throws:

IOException - in case of I/O errors

accept

public boolean accept(javax.servlet.http.HttpServletRequest request)

Description copied from interface: RequestHandler

Determines if current request can be handled by this requestHandler

Specified by:

accept in interface RequestHandler

Overrides:

accept in class RequestHandlerSupport

Parameters:

request - current HTTP request

Returns:

true if this requestHandler should handle this request

isResourceChanged

protected boolean isResourceChanged(javax.servlet.http.HttpServletRequest request)

Used to identify whether the HttpServletResponse.SC_NOT_MODIFIED or HttpServletResponse.SC_OK should be returned. Currently a single timestamp is used to detect the change for all resources. This might be no accurate, but at least it allows sending NOT_MODIFIED header much often resulting in less load on the server.

Override this method if a different way detecting change is required.

Returns:

true if the requested resource is changed on the server and the latest version should be returned.

newResponseHeadersConfigurer

protected ResponseHeadersConfigurer newResponseHeadersConfigurer()

Returns:

the ResponseHeadersConfigurer.

createProxyPath

public static String createProxyPath(String requestUri,
                     String resourceId)

Builds the request path for this request handler using the assumption that WroFilter has a mapping ending with a * character.

Parameters:

requestUri - of wro request used to compute the path to this request handler. This request uri is required, because we do not know how the wro filter is mapped.

Returns:

the path for this handler.

isProxyUri

public static boolean isProxyUri(String url)

Checks if the provided url is a resource proxy request.

Parameters:

url - to check.

Returns:

true if the provided url is a proxy resource.