RESTEASY003145：找不到内容类型 application/json 和类型类 org.keycloak.representations.AccessTokenResponse 的 Mess
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【中文标题】RESTEASY003145：找不到内容类型 application/json 和类型类 org.keycloak.representations.AccessTokenResponse 的 MessageBodyReader【英文标题】：RESTEASY003145: Unable to find a MessageBodyReader of content-type application/json and type class org.keycloak.representations.AccessTokenResponse 【发布时间】：2017-02-13 04:28:18 【问题描述】：我正在尝试测试 Keycloak REST API。 安装了 2.1.0.Final 版本。 我可以通过带有 SSL 的浏览器毫无问题地访问管理员。
我正在使用上面的代码：
Keycloak keycloakClient = KeycloakBuilder.builder()
.serverUrl("https://keycloak.intra.rps.com.br/auth")
.realm("testrealm")
.username("development")
.password("development")
.clientId("admin-cli")
.resteasyClient(new ResteasyClientBuilder().connectionPoolSize(10).build())
.build();
List<RealmRepresentation> rr = keycloakClient.realms().findAll();
得到了错误：
javax.ws.rs.ProcessingException: RESTEASY003145: Unable to find a MessageBodyReader of content-type application/json and type class org.keycloak.representations.AccessTokenResponse
javax.ws.rs.client.ResponseProcessingException: javax.ws.rs.ProcessingException: RESTEASY003145: Unable to find a MessageBodyReader of content-type application/json and type class org.keycloak.representations.AccessTokenResponse
at org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.extractResult(ClientInvocation.java:141)
at org.jboss.resteasy.client.jaxrs.internal.proxy.extractors.BodyEntityExtractor.extractEntity(BodyEntityExtractor.java:60)
at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientInvoker.invoke(ClientInvoker.java:104)
at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientProxy.invoke(ClientProxy.java:76)
at com.sun.proxy.$Proxy20.grantToken(Unknown Source)
at org.keycloak.admin.client.token.TokenManager.grantToken(TokenManager.java:85)
at org.keycloak.admin.client.token.TokenManager.getAccessToken(TokenManager.java:65)
at org.keycloak.admin.client.token.TokenManager.getAccessTokenString(TokenManager.java:60)
at org.keycloak.admin.client.resource.BearerAuthFilter.filter(BearerAuthFilter.java:52)
at org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.invoke(ClientInvocation.java:413)
at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientInvoker.invoke(ClientInvoker.java:102)
at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientProxy.invoke(ClientProxy.java:76)
at com.sun.proxy.$Proxy22.findAll(Unknown Source)
at br.com.rps.itsm.sd.SgpKeycloakClient.doGet(SgpKeycloakClient.java:71)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)
at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:284)
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:263)
at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:174)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:793)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: javax.ws.rs.ProcessingException: RESTEASY003145: Unable to find a MessageBodyReader of content-type application/json and type class org.keycloak.representations.AccessTokenResponse
at org.jboss.resteasy.core.interception.ClientReaderInterceptorContext.throwReaderNotFound(ClientReaderInterceptorContext.java:42)
at org.jboss.resteasy.core.interception.AbstractReaderInterceptorContext.getReader(AbstractReaderInterceptorContext.java:75)
at org.jboss.resteasy.core.interception.AbstractReaderInterceptorContext.proceed(AbstractReaderInterceptorContext.java:52)
at org.jboss.resteasy.plugins.interceptors.encoding.GZIPDecodingInterceptor.aroundReadFrom(GZIPDecodingInterceptor.java:59)
at org.jboss.resteasy.core.interception.AbstractReaderInterceptorContext.proceed(AbstractReaderInterceptorContext.java:55)
at org.jboss.resteasy.client.jaxrs.internal.ClientResponse.readFrom(ClientResponse.java:251)
at org.jboss.resteasy.client.jaxrs.internal.ClientResponse.readEntity(ClientResponse.java:181)
at org.jboss.resteasy.specimpl.BuiltResponse.readEntity(BuiltResponse.java:213)
at org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.extractResult(ClientInvocation.java:105)
我添加了上面的依赖，但没有解决我的问题：
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-client</artifactId>
<version>3.0.19.Final</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jackson-provider</artifactId>
<version>3.0.19.Final</version>
</dependency>
有什么线索吗？
【问题讨论】：
你解决了吗？我收到了同样的信息... 你解决了吗？ RestEasy - Unable to find MessageBodyReader?的可能重复 【参考方案1】：就我而言，我将问题的根源追溯到我切换到CompletableFuture这一事实。
使用的客户端版本可能已过时或其他原因，当它在 eclipse 中运行时，从外部可执行文件中它会因此错误而崩溃。
我可能会发布一个修复程序，但可能是：更新库或停止在此库上使用 CompletableFuture。
【讨论】：
或者如果可能的话从 Resteasy 切换到其他东西【参考方案2】：在 wildfly 11 / Keycloak 上下文中，以下内容使其适用于 RestEasyClientBuilder。
ResteasyClientBuilder builder = new ResteasyClientBuilder();
ResteasyProviderFactory providerFactory = ResteasyProviderFactory.getInstance();
builder.providerFactory(providerFactory);
使用您的 Resteasy 版本仔细检查 ResteasyProviderFactory 是否默认为 true。如果没有，请手动设置内置函数：
ResteasyProviderFactory.setRegisterBuiltinByDefault(true);
// or if ResteasyProviderFactory was already instantiated
RegisterBuiltin.register(providerFactory);
【讨论】：
你用你的第一部分回答拯救了我的一周。非常感谢！【参考方案3】：我遇到了MatteoM 指出的问题。我用 maven-shade-plugin 和 transforms 标签解决了。也许它可以帮助某人。
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.2.0</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<filters>
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
</excludes>
</filter>
</filters>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<manifestEntries>
<Main-Class>de.example.MainClass</Main-Class>
<X-Compile-Source-JDK>1.8</X-Compile-Source-JDK>
<X-Compile-Target-JDK>1.8</X-Compile-Target-JDK>
</manifestEntries>
</transformer>
<transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
<resource>META-INF/services/javax.ws.rs.ext.Providers</resource>
</transformer>
</transformers>
<artifactSet/>
<outputFile>$project.build.directory/$project.artifactId-$project.version-fat.jar</outputFile>
</configuration>
</execution>
</executions>
</plugin>
【讨论】：
为META-INF/services/javax.ws.rs.ext.Providers 添加变压器工作。【参考方案4】：
为我添加 Dmitry pointed out here 会导致以下警告：
WARN: RESTEASY002155: Provider class org.jboss.resteasy.plugins.providers.jackson.ResteasyJackson2Provider is already registered. 2nd registration is being ignored.
可能as Bacon said提供者是通过简单的添加依赖自动注册的：
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jackson2-provider</artifactId>
<version>$resteasy.version</version>
</dependency>
【讨论】：
【参考方案5】：或者，如果您使用代理创建客户端，那么最好在此之前初始化提供程序工厂：
ResteasyProviderFactory instance=ResteasyProviderFactory.getInstance();
RegisterBuiltin.register(instance);
instance.registerProvider(ResteasyJackson2Provider.class);
【讨论】：
【参考方案6】：我使用依赖来解决这个问题
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jackson2-provider</artifactId>
<version>3.1.0.Final</version>
</dependency>
【讨论】：
【参考方案7】：我解决了！！ 您必须将 org.jboss.resteasy.plugins.providers.jackson.ResteasyJacksonProvider 添加到 META-INF/services/javax.ws.rs.ext.Providers 文件中，然后运行您的可执行 jar。
【讨论】：
或 org.jboss.resteasy.plugins.providers.jackson.ResteasyJackson2Provider 使用maven的时候有解决办法吗？ 同样的问题。我已经在 pom 中添加了 resteasy-jackson2-provider 仍然有这个问题。以上是关于RESTEASY003145：找不到内容类型 application/json 和类型类 org.keycloak.representations.AccessTokenResponse 的 Mess的主要内容，如果未能解决你的问题，请参考以下文章
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