it.cnr.ilc.latmorphwebapp.ProxyHandler.java Source code

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Here is the source code for it.cnr.ilc.latmorphwebapp.ProxyHandler.java

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/*
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package it.cnr.ilc.latmorphwebapp;

/**
 *
 * @author Riccardo Del Gratta <riccardo.delgratta@ilc.cnr.it>
 */
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import javax.faces.application.ViewHandler;
import javax.faces.application.ViewHandlerWrapper;
import javax.faces.context.FacesContext;
import javax.servlet.http.HttpServletRequest;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.List;
import java.util.Map;

public class ProxyHandler extends ViewHandlerWrapper {
    private static final Log log = LogFactory.getLog(ProxyHandler.class);

    private ViewHandler wrappped;

    public ProxyHandler(ViewHandler wrappped) {
        super();
        this.wrappped = wrappped;

    }

    @Override
    public ViewHandler getWrapped() {
        return wrappped;
    }

    @Override
    public String getActionURL(FacesContext context, String viewId) {
        String url = super.getActionURL(context, viewId);
        log.debug("The getActionURL: " + url);
        return addContextPath(context, url);
    }

    @Override
    public String getRedirectURL(FacesContext context, String viewId, Map<String, List<String>> parameters,
            boolean includeViewParams) {
        String url = super.getRedirectURL(context, viewId, parameters, includeViewParams);
        log.debug("The getRedirectURL: " + url);
        return url;
    }

    @Override
    public String getResourceURL(FacesContext context, String path) {
        String url = super.getResourceURL(context, path);
        log.debug("The getResourceURL: = " + url);
        return addContextPath(context, url);
    }

    private String addContextPath(FacesContext context, String url) {
        final HttpServletRequest request = ((HttpServletRequest) context.getExternalContext().getRequest());
        String result = url;
        if (url.startsWith("/")) {
            int subpath = StringUtils.countMatches(getPath(request), "/") - 1;
            String pathPrefix = "";
            if (subpath > 0) {
                while (subpath > 0) {
                    pathPrefix += "/..";
                    subpath--;
                }
                pathPrefix = StringUtils.removeStart(pathPrefix, "/");
            }
            result = pathPrefix + result;
        }
        log.debug("addContextPath: = " + result);
        return result;
    }

    private String getPath(final HttpServletRequest request) {
        try {
            return StringUtils.replace(new URI(request.getRequestURI()).getPath(), "//", "/");
        } catch (final URISyntaxException e) {
            return StringUtils.EMPTY;
        }
    }

}