Getting the URL of the current page in Grails - grails

Question

In a Grails application I'd like to send a user from page A, then to a form on page B and then back to page A again.
To keep track of which URL to return to I send a "returnPage" parameter to page B containing the URL of page to return to (page A).
Currently I'm using request.getRequestURL() on page A to retrieve the page's URL. However, the URL I get from getRequestURL() does not correspond to the URL the end-user has in his/hers address bar:
request.getRequestURL() == "http://localhost:8080/something/WEB-INF/grails-app/views/layouts/main.gsp"
URL in address bar == "http://localhost:8080/something/some/thing"
How do I obtain the "end-user" URL?

Answer 1

The answer is request.forwardURI (details here).

Answer 2

I built this method to get current url.
static String getCurrentUrl(HttpServletRequest request){
StringBuilder sb = new StringBuilder()
sb << request.getRequestURL().substring(0,request.getRequestURL().indexOf("/", 8))
sb << request.getAttribute("javax.servlet.forward.request_uri")
if(request.getAttribute("javax.servlet.forward.query_string")){
sb << "?"
sb << request.getAttribute("javax.servlet.forward.query_string")
}
return sb.toString();
}

Answer 3

I prefer to use:
createLink(action: "index", controller:"user", absolute: true)
// http://localhost:8080/project/user
when I need to get an absolute url!
It's interesting to get relative path too:
createLink(action: "index", controller:"user")
// /project/user

Answer 4

When creating the link to page B you can use the createLink tag to set the returnPage parameter:
<g:link controller="pageB"
action="someaction"
params='[returnPage:createLink(action:actionName, params:params)]'>
Go to Page B
</g:link>

Answer 5

My solution (Grails 1.3.7) is this one, you can copy and paste it into your controller:
boolean includePort = true;
String scheme = request.getScheme();
String serverName = request.getServerName();
int serverPort = (new org.springframework.security.web.PortResolverImpl()).getServerPort(request)
String contextPath = request.getContextPath();
boolean inHttp = "http".equals(scheme.toLowerCase());
boolean inHttps = "https".equals(scheme.toLowerCase());
if (inHttp && (serverPort == 80)) {
includePort = false;
} else if (inHttps && (serverPort == 443)) {
includePort = false;
}
String redirectUrl = scheme + "://" + serverName + ((includePort) ? (":" + serverPort) : "") + contextPath;
In our application, we cannot just use g.createLink(.. absolute:true) because we have different end-user URLs because of multiple customers.