Package ru.vyarus.guicey.gsp.app.filter.redirect

Class SpaSupport

java.lang.Object

ru.vyarus.guicey.gsp.app.filter.redirect.SpaSupport

public class SpaSupport
extends Object

SPA routes support (HTML5 client routing). Support rely on errors handling: when 404 error appear (no matter in assets or views), spa support is checked (if enabled) and spa redirection performed instead of error handling.

Error based approach does not influence normal processing: all checks appear only after error appearance (so enabling SPA support will not influence application).

Also, SPA support forcefully sets no cache header for index page (or any route, redirected to index page).

Since:

16.01.2019

Constructor Summary

Constructors

Constructor	Description
SpaSupport(boolean enabled, String rootMapping, String target, String noRedirectRegex)

Method Summary

Modifier and Type	Method	Description
void	markPossibleSpaRoute(jakarta.servlet.http.HttpServletRequest req, jakarta.servlet.http.HttpServletResponse res)	Simple to check for root page: if current request is already root request then no SPA route could be performed.
boolean	redirect(jakarta.servlet.http.HttpServletRequest req, jakarta.servlet.http.HttpServletResponse res, int code)	Perform redirection of SPA into index page (so browser receive index html on spa routing url) if conditions match.

Methods inherited from class java.lang.Object

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

Constructor Details

SpaSupport

public SpaSupport(boolean enabled,
 String rootMapping,
 String target,
 String noRedirectRegex)

Method Details

markPossibleSpaRoute

public void markPossibleSpaRoute(jakarta.servlet.http.HttpServletRequest req,
 jakarta.servlet.http.HttpServletResponse res)

Simple to check for root page: if current request is already root request then no SPA route could be performed. Also, applies no cache header for the root page.

Parameters:

req - request instance

res - response instance

redirect

public boolean redirect(jakarta.servlet.http.HttpServletRequest req,
 jakarta.servlet.http.HttpServletResponse res,
 int code)

Perform redirection of SPA into index page (so browser receive index html on spa routing url) if conditions match.

• SPA support enabled
• It't not already root (see markPossibleSpaRoute(HttpServletRequest, HttpServletResponse))
• Request accept html response
• Request doesn't match filter regexp (describing static files)

Parameters:

req - request instance

res - response instance

code - error code (http)

Returns:

true if redirection performed, false otherwise (SPA route not recognized)