使用 JAVA 通过 REST API 集成 Keycloak 时在 toRepresentation() 处获取 404

Posted 2023-02-19

【中文标题】使用 JAVA 通过 REST API 集成 Keycloak 时在 toRepresentation() 处获取 404

【英文标题】：Getting 404 at toRepresentation() when integrating Keycloak via REST API using JAVA

【发布时间】：2021-05-14 05:37:56

【问题描述】：

我正在尝试连接到在 localhost 上运行的 Keycloak 实例并使用 userid 查找特定用户。我已经在 Keycloak 中创建了相关的 Realm、用户等。

TestKeycloakConnection.java

package org.keycloak.pkg.test;

import org.jboss.resteasy.client.jaxrs.ResteasyClientBuilder;
import org.keycloak.admin.client.Keycloak;
import org.keycloak.admin.client.KeycloakBuilder;
import org.keycloak.admin.client.resource.UserResource;
import org.keycloak.admin.client.resource.UsersResource;

public class TestKeycloakConnection 

    public static final String KEYCLOAK_URL = "https://localhost/auth";
    public static final String KEYCLOAK_REALM = "myreaml";
    public static final String KEYCLOAK_USER = "admin";
    public static final String KEYCLOAK_PASSWORD = "admin";
    public static final String KEYCLOAK_ADMIN_CLI = "admin-cli";

  public static void main(String[] args) 
    Keycloak keycloak = KeycloakBuilder
        .builder()
        .serverUrl(KEYCLOAK_URL)
        .realm(KEYCLOAK_REALM)
        .username(KEYCLOAK_USER)
        .password(KEYCLOAK_PASSWORD)
        .clientId(KEYCLOAK_ADMIN_CLI)
        .resteasyClient(new ResteasyClientBuilder().connectionPoolSize(10).build())
        .build();
    UsersResource usersResource = keycloak.realm(KEYCLOAK_REALM).users();
    UserResource userResource = usersResource.get("8af231bd-0305-4921-a52d-6c0dda224e24");

    ////////////////////// GETTING 404 IN FOLLOWING LINE ////////////////////
    System.out.println("userResource:"+userResource.toRepresentation().getUsername());
  

pom.xml

<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-admin-client</artifactId>
    <version>12.0.2</version>
</dependency>
<dependency>
    <groupId>org.jboss.resteasy</groupId>
    <artifactId>resteasy-jaxrs</artifactId>
    <version>3.15.0.Alpha1</version>
</dependency>
<dependency>
    <groupId>org.jboss.resteasy</groupId>
    <artifactId>resteasy-client</artifactId>
    <version>3.0.26.Final</version>
</dependency>
<dependency>
    <groupId>org.jboss.resteasy</groupId>
    <artifactId>resteasy-jackson2-provider</artifactId>
    <version>3.1.0.Final</version>
</dependency>

错误堆栈：

线程“主”javax.ws.rs.ProcessingException 中的异常： javax.ws.rs.NotFoundException：HTTP 404 未在 org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.invoke(ClientInvocation.java:436) 在 org.jboss.resteasy.client.jaxrs.internal.proxy.ClientInvoker.invoke(ClientInvoker.java:106) 在 org.jboss.resteasy.client.jaxrs.internal.proxy.ClientProxy.invoke(ClientProxy.java:76) 在 com.sun.proxy.$Proxy27.toRepresentation（未知来源） org.keycloak.pkg.providers.config.TestKeycloakConnection.main(TestKeycloakConnection.java:41) 原因：javax.ws.rs.NotFoundException: HTTP 404 Not Found at org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.handleErrorStatus(ClientInvocation.java:200)

类似的问题：

https://keycloak.discourse.group/t/404-when-calling-torepresentation/3606

【参考方案1】：

问题在于这部分：

   Keycloak keycloak = KeycloakBuilder
        .builder()
        .serverUrl(KEYCLOAK_URL)
        .realm(KEYCLOAK_REALM) // <----- this is wrong
        .username(KEYCLOAK_USER) 
        .password(KEYCLOAK_PASSWORD)
        .clientId(KEYCLOAK_ADMIN_CLI)
        .resteasyClient(new ResteasyClientBuilder().connectionPoolSize(10).build())
        .build();

您应该将master 传递给.realm(..)，因为这通常是客户端admin-cli 所在的位置。

一个正在运行的解决方案：

package org.keycloak.pkg.test;

import org.jboss.resteasy.client.jaxrs.ResteasyClientBuilder;
import org.keycloak.admin.client.Keycloak;
import org.keycloak.admin.client.KeycloakBuilder;
import org.keycloak.admin.client.resource.UserResource;
import org.keycloak.admin.client.resource.UsersResource;

public class TestKeycloakConnection 

    public static final String KEYCLOAK_URL = "https://localhost/auth";
    public static final String KEYCLOAK_REALM = "myreaml";
    public static final String KEYCLOAK_USER = "admin";
    public static final String KEYCLOAK_PASSWORD = "admin";
    public static final String KEYCLOAK_ADMIN_CLI = "admin-cli";

  public static void main(String[] args) 
    Keycloak keycloak = KeycloakBuilder
        .builder()
        .serverUrl(KEYCLOAK_URL)
        .realm("master")
        .username(KEYCLOAK_USER)
        .password(KEYCLOAK_PASSWORD)
        .clientId(KEYCLOAK_ADMIN_CLI)
        .resteasyClient(new ResteasyClientBuilder().connectionPoolSize(10).build())
        .build();
    UsersResource usersResource = keycloak.realm(KEYCLOAK_REALM).users();
    UserResource userResource = usersResource.get("8af231bd-0305-4921-a52d-6c0dda224e24");
 System.out.println("userResource:"+userResource.toRepresentation().getUsername());