com.kakawait.spring.security.cas.web.RequestAwareCasAuthenticationEntryPoint Maven / Gradle / Ivy

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Spring security cas extension and additional implementation used by the starter

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package com.kakawait.spring.security.cas.web;

import org.jasig.cas.client.util.CommonUtils;
import org.springframework.security.cas.web.CasAuthenticationEntryPoint;
import org.springframework.util.Assert;

import java.net.URI;
import java.util.Optional;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import static org.springframework.web.servlet.support.ServletUriComponentsBuilder.fromContextPath;

/**
 * @author Thibaud Leprêtre
 */
public class RequestAwareCasAuthenticationEntryPoint extends CasAuthenticationEntryPoint {

    private final URI loginPath;

    public RequestAwareCasAuthenticationEntryPoint(URI loginPath) {
        Assert.notNull(loginPath, "login path is required, it must not be null");
        this.loginPath = loginPath;
    }

    @Override
    public void afterPropertiesSet() {
        Assert.hasLength(getLoginUrl(), "loginUrl must be specified");
        Assert.notNull(getServiceProperties(), "serviceProperties must be specified");
    }

    @Override
    protected String createServiceUrl(HttpServletRequest request, HttpServletResponse response) {
        String serviceUrl = buildUrl(request, loginPath).orElse(loginPath.toASCIIString());
        return CommonUtils.constructServiceUrl(null, response, serviceUrl, null,
                getServiceProperties().getServiceParameter(), getServiceProperties().getArtifactParameter(), true);
    }

    private static Optional buildUrl(HttpServletRequest request, URI path) {
        Assert.notNull(request, "request is required; it must not be null");
        if (!path.isAbsolute()) {
            return Optional.of(fromContextPath(request).path(path.toASCIIString()).toUriString());
        }
        return Optional.empty();
    }
}