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HelloWorldServlet.java
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HelloWorldServlet.java
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package com.contoso.sample;
import java.io.IOException;
import java.util.Iterator;
import javax.servlet.annotation.HttpConstraint;
import javax.servlet.annotation.ServletSecurity;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.sap.cloud.sdk.cloudplatform.security.Authorization;
import com.sap.cloud.sdk.cloudplatform.security.principal.CollectionPrincipalAttribute;
import com.sap.cloud.sdk.cloudplatform.security.principal.DefaultPrincipal;
import com.sap.cloud.sdk.cloudplatform.security.principal.DefaultPrincipalFacade;
import com.sap.cloud.sdk.cloudplatform.security.principal.Principal;
import com.sap.cloud.sdk.cloudplatform.security.principal.PrincipalAttribute;
import com.sap.cloud.sdk.cloudplatform.security.principal.StringPrincipalAttribute;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import io.vavr.control.Try;
@WebServlet("/hello")
@ServletSecurity(@HttpConstraint(rolesAllowed = { "Display" }))
public class HelloWorldServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private static final Logger logger = LoggerFactory.getLogger(HelloWorldServlet.class);
@Override
protected void doGet(final HttpServletRequest request, final HttpServletResponse response)
throws IOException {
logger.info("I am running!");
Try<Principal> currentUser = new DefaultPrincipalFacade().tryGetCurrentPrincipal();
if (currentUser.isSuccess()) {
DefaultPrincipal defaultCurrentUser = (DefaultPrincipal) currentUser.get();
response.getWriter().println("Hello " + defaultCurrentUser.getPrincipalId());
Iterator<PrincipalAttribute> i = defaultCurrentUser.getAttributes().values().iterator();
while (i.hasNext()) {
CollectionPrincipalAttribute<PrincipalAttribute> attribute = (CollectionPrincipalAttribute<PrincipalAttribute>) i
.next();
if (attribute.getValues().size() > 0) {
response.getWriter()
.println("Attribute: " + attribute.getName() + ", Value: " + attribute.getValues());
} else {
logger.info("Attribute {} is empty", attribute.getName());
}
}
Iterator<Authorization> j = ((DefaultPrincipal) currentUser.get()).getAuthorizations().iterator();
while (j.hasNext()) {
Authorization scope = (Authorization) j.next();
response.getWriter().println("Scope: " + scope.getName());
}
} else {
response.getWriter().println("No authenticated user");
}
}
}