Add Spring Boot Example

Closes gh-558

samples/boot/src/main/java/sample/HelloController.java

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+package sample;
+
+import java.util.List;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.ldap.core.AttributesMapper;
+import org.springframework.ldap.core.LdapTemplate;
+import org.springframework.security.core.Authentication;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class HelloController {
+    @Autowired
+    LdapTemplate ldap;
+
+    @GetMapping
+    public String hello(Authentication authentication) {
+        return "Hello, " + authentication.getName();
+    }
+
+    @GetMapping("/cn")
+    public List<String> cn(Authentication authentication) {
+        AttributesMapper<String> mapper = (attrs) -> attrs.get("cn").get().toString();
+        return this.ldap.search("ou=people", "uid=" + authentication.getName(), mapper);
+    }
+}

samples/boot/src/main/java/sample/SecurityConfig.java

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+package sample;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.ldap.core.ContextSource;
+import org.springframework.ldap.core.support.BaseLdapPathContextSource;
+import org.springframework.security.ldap.DefaultSpringSecurityContextSource;
+import org.springframework.security.ldap.authentication.BindAuthenticator;
+import org.springframework.security.ldap.authentication.LdapAuthenticationProvider;
+import org.springframework.security.ldap.authentication.LdapAuthenticator;
+import org.springframework.security.ldap.server.UnboundIdContainer;
+import org.springframework.security.ldap.userdetails.PersonContextMapper;
+
+@Configuration
+public class SecurityConfig {
+    @Bean
+    UnboundIdContainer ldapContainer() {
+        UnboundIdContainer container = new UnboundIdContainer("dc=springframework,dc=org", "classpath:users.ldif");
+        container.setPort(0);
+        return container;
+    }
+
+    @Bean
+    ContextSource contextSource(UnboundIdContainer container) {
+        int port = container.getPort();
+        return new DefaultSpringSecurityContextSource("ldap://localhost:" + port + "/dc=springframework,dc=org");
+    }
+
+    @Bean
+    BindAuthenticator authenticator(BaseLdapPathContextSource contextSource) {
+        BindAuthenticator authenticator = new BindAuthenticator(contextSource);
+        authenticator.setUserDnPatterns(new String[] { "uid={0},ou=people" });
+        return authenticator;
+    }
+
+    @Bean
+    LdapAuthenticationProvider authenticationProvider(LdapAuthenticator authenticator) {
+        LdapAuthenticationProvider provider = new LdapAuthenticationProvider(authenticator);
+        provider.setUserDetailsContextMapper(new PersonContextMapper());
+        return provider;
+    }
+}

samples/boot/src/main/java/sample/SpringLdapSimpleSampleApplication.java

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+package sample;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SpringLdapSimpleSampleApplication  {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SpringLdapSimpleSampleApplication.class, args);
+    }
+
+}

samples/boot/src/main/resources/users.ldif

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+dn: ou=groups,dc=springframework,dc=org
+objectclass: top
+objectclass: organizationalUnit
+ou: groups
+
+dn: ou=subgroups,ou=groups,dc=springframework,dc=org
+objectclass: top
+objectclass: organizationalUnit
+ou: subgroups
+
+dn: ou=people,dc=springframework,dc=org
+objectclass: top
+objectclass: organizationalUnit
+ou: people
+
+dn: ou=space cadets,dc=springframework,dc=org
+objectclass: top
+objectclass: organizationalUnit
+ou: space cadets
+
+dn: ou=\"quoted people\",dc=springframework,dc=org
+objectclass: top
+objectclass: organizationalUnit
+ou: "quoted people"
+
+dn: ou=otherpeople,dc=springframework,dc=org
+objectclass: top
+objectclass: organizationalUnit
+ou: otherpeople
+
+dn: uid=ben,ou=people,dc=springframework,dc=org
+objectclass: top
+objectclass: person
+objectclass: organizationalPerson
+objectclass: inetOrgPerson
+cn: Ben Alex
+sn: Alex
+uid: ben
+userPassword: $2a$10$c6bSeWPhg06xB1lvmaWNNe4NROmZiSpYhlocU/98HNr2MhIOiSt36
+
+dn: uid=bob,ou=people,dc=springframework,dc=org
+objectclass: top
+objectclass: person
+objectclass: organizationalPerson
+objectclass: inetOrgPerson
+cn: Bob Hamilton
+sn: Hamilton
+uid: bob
+userPassword: bobspassword
+
+dn: uid=joe,ou=otherpeople,dc=springframework,dc=org
+objectclass: top
+objectclass: person
+objectclass: organizationalPerson
+objectclass: inetOrgPerson
+cn: Joe Smeth
+sn: Smeth
+uid: joe
+userPassword: joespassword
+
+dn: cn=mouse\, jerry,ou=people,dc=springframework,dc=org
+objectclass: top
+objectclass: person
+objectclass: organizationalPerson
+objectclass: inetOrgPerson
+cn: Mouse, Jerry
+sn: Mouse
+uid: jerry
+userPassword: jerryspassword
+
+dn: cn=slash/guy,ou=people,dc=springframework,dc=org
+objectclass: top
+objectclass: person
+objectclass: organizationalPerson
+objectclass: inetOrgPerson
+cn: slash/guy
+sn: Slash
+uid: slashguy
+userPassword: slashguyspassword
+
+dn: cn=quote\"guy,ou=\"quoted people\",dc=springframework,dc=org
+objectclass: top
+objectclass: person
+objectclass: organizationalPerson
+objectclass: inetOrgPerson
+cn: quote\"guy
+sn: Quote
+uid: quoteguy
+userPassword: quoteguyspassword
+
+dn: uid=space cadet,ou=space cadets,dc=springframework,dc=org
+objectclass: top
+objectclass: person
+objectclass: organizationalPerson
+objectclass: inetOrgPerson
+cn: Space Cadet
+sn: Cadet
+uid: space cadet
+userPassword: spacecadetspassword
+
+
+
+dn: cn=developers,ou=groups,dc=springframework,dc=org
+objectclass: top
+objectclass: groupOfUniqueNames
+cn: developers
+ou: developer
+uniqueMember: uid=ben,ou=people,dc=springframework,dc=org
+uniqueMember: uid=bob,ou=people,dc=springframework,dc=org
+
+dn: cn=managers,ou=groups,dc=springframework,dc=org
+objectclass: top
+objectclass: groupOfUniqueNames
+cn: managers
+ou: manager
+uniqueMember: uid=ben,ou=people,dc=springframework,dc=org
+uniqueMember: cn=mouse\, jerry,ou=people,dc=springframework,dc=org
+
+dn: cn=submanagers,ou=subgroups,ou=groups,dc=springframework,dc=org
+objectclass: top
+objectclass: groupOfUniqueNames
+cn: submanagers
+ou: submanager
+uniqueMember: uid=ben,ou=people,dc=springframework,dc=org

samples/boot/src/test/java/sample/SpringLdapSimpleSampleApplicationTests.java

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+package sample;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.HttpHeaders;
+import org.springframework.test.web.servlet.MockMvc;
+
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+@SpringBootTest
+@AutoConfigureMockMvc
+class SpringLdapSimpleSampleApplicationTests {
+
+    @Autowired
+    MockMvc mvc;
+
+    @Test
+    void indexWhenCorrectUsernameAndPasswordThenAuthenticates() throws Exception {
+        HttpHeaders http = new HttpHeaders();
+        http.setBasicAuth("bob", "bobspassword");
+        this.mvc.perform(get("/").headers(http))
+                .andExpect(status().isOk())
+                .andExpect(content().string("Hello, bob"));
+    }
+
+    @Test
+    void cnWhenCorrectUsernameAndPasswordThenShowsCommonName() throws Exception {
+        HttpHeaders http = new HttpHeaders();
+        http.setBasicAuth("bob", "bobspassword");
+        this.mvc.perform(get("/cn").headers(http))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.[0]").value("Bob Hamilton"));
+    }
+}