一、异常
feign.codec.EncodeException: Content-Type cannot contain wildcard type '*'
at feign.ReflectiveFeign$BuildEncodedTemplateFromArgs.resolve(ReflectiveFeign.java:376)
at feign.ReflectiveFeign$BuildTemplateByResolvingArgs.create(ReflectiveFeign.java:224)
at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:75)
at feign.ReflectiveFeign$FeignInvocationHandler.invoke(ReflectiveFeign.java:103)
at com.sun.proxy.$Proxy181.startMonitor(Unknown Source)
at Testv.test(Testv.java:55)
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 org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:74)
at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:84)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
at com.intellij.rt.junit.IdeaTestRunner$Repeater$1.execute(IdeaTestRunner.java:38)
at com.intellij.rt.execution.junit.TestsRepeater.repeat(TestsRepeater.java:11)
at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:35)
at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:235)
at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54)
Caused by: java.lang.IllegalArgumentException: Content-Type cannot contain wildcard type '*'
at org.springframework.util.Assert.isTrue(Assert.java:118)
at org.springframework.http.HttpHeaders.setContentType(HttpHeaders.java:949)
at org.springframework.http.converter.AbstractHttpMessageConverter.addDefaultHeaders(AbstractHttpMessageConverter.java:256)
at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:211)
at org.springframework.cloud.openfeign.support.SpringEncoder.encode(SpringEncoder.java:114)
at feign.ReflectiveFeign$BuildEncodedTemplateFromArgs.resolve(ReflectiveFeign.java:372)
... 37 more二、发生场景/原因
1. 场景
在使用SpringCloud openFeign 过程中配置 序列化 为FastJson方式 导致异常。
配置如下：
@Configuration
public class FeignConfig {
@Bean
public Encoder feignEncoder() {
return new SpringEncoder(feignHttpMessageConverter());
}
private ObjectFactory feignHttpMessageConverter() {
HttpMessageConverters httpMessageConverters = new HttpMessageConverters(getFastJsonConverter());
return () -> httpMessageConverters;
}
private FastJsonHttpMessageConverter getFastJsonConverter() {
FastJsonHttpMessageConverter fastJsonHttpMessageConverter = new FastJsonHttpMessageConverter();
FastJsonConfig config = new FastJsonConfig();
config.setSerializerFeatures(
SerializerFeature.QuoteFieldNames,
//SerializerFeature.WriteMapNullValue,
SerializerFeature.WriteNullBooleanAsFalse,
SerializerFeature.BrowserCompatible,
SerializerFeature.WriteSlashAsSpecial,
SerializerFeature.WriteDateUseDateFormat,
SerializerFeature.DisableCircularReferenceDetect
);
fastJsonHttpMessageConverter.setFastJsonConfig(config);
return fastJsonHttpMessageConverter;
}
}2. 原因
经排查， 是在创建 FastJsonHttpMessageConverter 时 默认会设置 MediaType.ALL ,在AbstractHttpMessageConverter .write 过程中 会判断 Content-Type 中不能有通配符 所以会导致报错。
FastJsonHttpMessageConverter fastJsonHttpMessageConverter = new FastJsonHttpMessageConverter();FastJsonHttpMessageConverter 空参构造函数
public FastJsonHttpMessageConverter() {
super(MediaType.ALL); // */*
}源码解析
FastJsonHttpMessageConverter 继承 AbstractHttpMessageConverter
(AbstractHttpMessageConverter )writer -> (AbstractHttpMessageConverter ) addDefaultHeaders -> (HttpHeaders)setContentType
在 第二个图中 setContentType 中 校验了 MediaType 不能为 通配符 *
image.png
image.png
三、 解决方法
在配置中 手动加入MediaType
/**
* Feign 配置设置
*
* @Author su
* @Date 2022/9/13 11:22
*/
@Configuration
public class FeignConfig {
@Bean
public Encoder feignEncoder() {
return new SpringEncoder(feignHttpMessageConverter());
}
private ObjectFactory feignHttpMessageConverter() {
HttpMessageConverters httpMessageConverters = new HttpMessageConverters(getFastJsonConverter());
return () -> httpMessageConverters;
}
private FastJsonHttpMessageConverter getFastJsonConverter() {
FastJsonHttpMessageConverter fastJsonHttpMessageConverter = new FastJsonHttpMessageConverter();
// -------------------设置MediaType
List supportedMediaTypes = new ArrayList<>();
supportedMediaTypes.add(MediaType.APPLICATION_JSON);
supportedMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
supportedMediaTypes.add(MediaType.APPLICATION_ATOM_XML);
supportedMediaTypes.add(MediaType.APPLICATION_FORM_URLENCODED);
supportedMediaTypes.add(MediaType.APPLICATION_OCTET_STREAM);
supportedMediaTypes.add(MediaType.APPLICATION_PDF);
supportedMediaTypes.add(MediaType.APPLICATION_RSS_XML);
supportedMediaTypes.add(MediaType.APPLICATION_XHTML_XML);
supportedMediaTypes.add(MediaType.APPLICATION_XML);
supportedMediaTypes.add(MediaType.IMAGE_GIF);
supportedMediaTypes.add(MediaType.IMAGE_JPEG);
supportedMediaTypes.add(MediaType.IMAGE_PNG);
supportedMediaTypes.add(MediaType.TEXT_EVENT_STREAM);
supportedMediaTypes.add(MediaType.TEXT_HTML);
supportedMediaTypes.add(MediaType.TEXT_MARKDOWN);
supportedMediaTypes.add(MediaType.TEXT_PLAIN);
supportedMediaTypes.add(MediaType.TEXT_XML);
fastJsonHttpMessageConverter.setSupportedMediaTypes(supportedMediaTypes);
// -------------------设置MediaType
FastJsonConfig config = new FastJsonConfig();//采用默认 SerializerFeatures
config.setSerializerFeatures(
SerializerFeature.QuoteFieldNames,
//SerializerFeature.WriteMapNullValue,
SerializerFeature.WriteNullBooleanAsFalse,
SerializerFeature.BrowserCompatible,
SerializerFeature.WriteSlashAsSpecial,
SerializerFeature.WriteDateUseDateFormat,
SerializerFeature.DisableCircularReferenceDetect
);
fastJsonHttpMessageConverter.setFastJsonConfig(config);
return fastJsonHttpMessageConverter;
}
}