java - Keycloak getAccessToken 在 Java Eclipse/Maven 项目中工作，但通过命令行运行时抛出ProcessingException

Question

当在 Eclipse 环境中运行时，Eclipse 中的 Maven 项目从我们的 keycloak 服务器检索访问 token 。当我编译一个包含所有依赖项的 fat jar 时，在相同的 JDK/JRE(1.8) 上运行的相同代码会抛出ProcessingException。令我困惑的是，它通过 Eclipse(瘦 JAR)在同一台计算机上运行，​​但不能通过命令行(胖 JAR)运行。两种环境都使用相同的 Java 安装以及相同的库。

javax.ws.rs.ProcessingException: RESTEASY004655: Unable to invoke request: javax.ws.rs.ProcessingException: RESTEASY003215: could not find writer for content-type application/x-www-form-urlencoded type: javax.ws.rs.core.Form$1
        at org.jboss.resteasy.client.jaxrs.engines.ApacheHttpClient4Engine.invoke(ApacheHttpClient4Engine.java:325)

我已经阅读了 stackoverflow 上的类似问题，并在网络上搜索了异常以及 RESTEASY 代码。我尝试了以下更改，但行为没有改变...

1. 使用 jboss ApacheHttpClient4Engine 与 ResteasyClientBuilder
2. keycloak 版本:6.0.1、7.0.1、8.0.1

代码环境:

• 操作系统:Windows 10
• Eclipse RCP 版本 2019 年 12 月
• Windows 10 命令行
• JDK 1.8.0_231(命令行和 Eclipse 的二进制文件和库的安装相同)

代码的相关部分、pom.xml 和完整的堆栈跟踪如下。如果更多详细信息有帮助，请告诉我。谢谢!

          if (!requireValidToken) return;

            keycloak = KeycloakBuilder.builder()
                    .serverUrl(deployment.getAuthServerBaseUrl())
                    .realm(deployment.getRealm())
                    .username(username).password(passwd)
                    .clientId(deployment.getResourceName())
                    .resteasyClient(new ResteasyClientBuilder().build()).build();

            System.out.println("CODE ALWAYS THROWS AN EXCEPTION AT THE NEXT LINE");
            AccessTokenResponse tokenResponse = keycloak.tokenManager().getAccessToken();   
            System.out.println("CODE ALWAYS THROWS AN EXCEPTION BEFORE THIS LINE");
            setAccessToken(tokenResponse.getToken());
            verifyToken(tokenResponse.getToken(), null, null, null);                    

        } catch (Exception e) {         
        e.printStackTrace();

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <keycloak.version>7.0.1</keycloak.version>
        <resteasy.version>3.7.0.Final</resteasy.version>
        <jackson.version>2.9.9</jackson.version>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>resteasy-client</artifactId>
            <version>${resteasy.version}</version>
        </dependency>
        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>resteasy-jackson2-provider</artifactId>
            <version>${resteasy.version}</version>
        </dependency>
        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>resteasy-jaxrs</artifactId>
            <version>${resteasy.version}</version>
        </dependency>
        <dependency>
            <groupId>org.keycloak</groupId>
            <artifactId>keycloak-admin-client</artifactId>
            <version>${keycloak.version}</version>
        </dependency>
        <dependency>
            <groupId>org.keycloak</groupId>
            <artifactId>keycloak-adapter-core</artifactId>
            <version>${keycloak.version}</version>
        </dependency>
        <dependency>
            <groupId>org.keycloak</groupId>
            <artifactId>keycloak-installed-adapter</artifactId>
            <version>${keycloak.version}</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.keycloak/keycloak-core -->
        <dependency>
            <groupId>org.keycloak</groupId>
            <artifactId>keycloak-core</artifactId>
            <version>${keycloak.version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>${jackson.version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.jaxrs</groupId>
            <artifactId>jackson-jaxrs-base</artifactId>
            <version>${jackson.version}</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.11</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpcore</artifactId>
            <version>4.4.13</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpmime</artifactId>
            <version>4.5.11</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.6</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.jdom/jdom -->
        <dependency>
            <groupId>org.jdom</groupId>
            <artifactId>jdom</artifactId>
            <version>1.1.3</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/jaxen/jaxen -->
        <dependency>
            <groupId>jaxen</groupId>
            <artifactId>jaxen</artifactId>
            <version>1.2.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/net.imagej/ij -->
        <dependency>
            <groupId>net.imagej</groupId>
            <artifactId>ij</artifactId>
            <version>1.49c</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.json/json -->
        <dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20180813</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.openrdf/rio -->
        <dependency>
            <groupId>org.openrdf.sesame</groupId>
            <artifactId>sesame-rio-api</artifactId>
            <version>4.1.2</version>
        </dependency>
        <dependency>
            <groupId>org.openrdf.sesame</groupId>
            <artifactId>sesame-rio-rdfxml</artifactId>
            <version>4.1.2</version>
        </dependency>
        <dependency>
            <groupId>org.openrdf.sesame</groupId>
            <artifactId>sesame-rio-turtle</artifactId>
            <version>4.1.2</version>
        </dependency>
    </dependencies>

异常跟踪:

javax.ws.rs.ProcessingException: RESTEASY004655: Unable to invoke request: javax.ws.rs.ProcessingException: RESTEASY003215: could not find writer for content-type application/x-www-form-urlencoded type: javax.ws.rs.core.Form$1
        at org.jboss.resteasy.client.jaxrs.engines.ApacheHttpClient4Engine.invoke(ApacheHttpClient4Engine.java:325)
        at org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.invoke(ClientInvocation.java:443)
        at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientInvoker.invokeSync(ClientInvoker.java:149)
        at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientInvoker.invoke(ClientInvoker.java:112)
        at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientProxy.invoke(ClientProxy.java:76)
        at com.sun.proxy.$Proxy16.grantToken(Unknown Source)
        at org.keycloak.admin.client.token.TokenManager.grantToken(TokenManager.java:89)
        at org.keycloak.admin.client.token.TokenManager.getAccessToken(TokenManager.java:69)
        at org.emile.cirilo.business.KeycloakProxy.<init>(KeycloakProxy.java:109)
        at org.emile.cirilo.fedora.FedoraConnector.stubOpenConnection(FedoraConnector.java:133)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244)
        at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
        at py4j.Gateway.invoke(Gateway.java:282)
        at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
        at py4j.commands.CallCommand.execute(CallCommand.java:79)
        at py4j.GatewayConnection.run(GatewayConnection.java:238)
        at java.lang.Thread.run(Thread.java:748)
Caused by: javax.ws.rs.ProcessingException: RESTEASY003215: could not find writer for content-type application/x-www-form-urlencoded type: javax.ws.rs.core.Form$1
        at org.jboss.resteasy.core.interception.ClientWriterInterceptorContext.throwWriterNotFoundException(ClientWriterInterceptorContext.java:38)
        at org.jboss.resteasy.core.interception.AbstractWriterInterceptorContext.getWriter(AbstractWriterInterceptorContext.java:146)
        at org.jboss.resteasy.core.interception.AbstractWriterInterceptorContext.proceed(AbstractWriterInterceptorContext.java:121)
        at org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.writeRequestBody(ClientInvocation.java:398)
        at org.jboss.resteasy.client.jaxrs.engines.ApacheHttpClient4Engine.writeRequestBodyToOutputStream(ApacheHttpClient4Engine.java:671)
        at org.jboss.resteasy.client.jaxrs.engines.ApacheHttpClient4Engine.buildEntity(ApacheHttpClient4Engine.java:636)
        at org.jboss.resteasy.client.jaxrs.engines.ApacheHttpClient4Engine.loadHttpMethod(ApacheHttpClient4Engine.java:514)
        at org.jboss.resteasy.client.jaxrs.engines.ApacheHttpClient4Engine.invoke(ApacheHttpClient4Engine.java:313)
        ... 20 more

Answer 1

有点晚了，但是对于 Maven 项目，请看这里: resteasy providers missing after mvn package

对于Gradle项目来说，Gradle Shadow Plugin的用法是需要的。

shadowJar {
    mergeServiceFiles()

    append 'META-INF/services/javax.ws.rs.ext.Providers'
}