一百姓、異常

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

二咱台、發(fā)生場景/原因

1. 場景

在使用SpringCloud openFeign 過程中配置 序列化 為FastJson方式 導致異常蛤奢。
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

經(jīng)排查， 是在創(chuàng)建 FastJsonHttpMessageConverter 時 默認會設(shè)置 MediaType.ALL ,在AbstractHttpMessageConverter .write 過程中 會判斷 Content-Type 中不能有通配符 所以會導致報錯饵骨。

FastJsonHttpMessageConverter fastJsonHttpMessageConverter = new FastJsonHttpMessageConverter();

FastJsonHttpMessageConverter 空參構(gòu)造函數(shù)

public FastJsonHttpMessageConverter() {
        super(MediaType.ALL);  // */*
}

源碼解析
FastJsonHttpMessageConverter 繼承 AbstractHttpMessageConverter

(AbstractHttpMessageConverter )writer -> (AbstractHttpMessageConverter ) addDefaultHeaders -> (HttpHeaders)setContentType

在 第二個圖中 setContentType 中 校驗了 MediaType 不能為 通配符 *

image.png

image.png

三翘悉、 解決方法

在配置中 手動加入MediaType

/**
 * Feign 配置設(shè)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();
        // -------------------設(shè)置MediaType 
        List<MediaType> 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);
        // -------------------設(shè)置MediaType 
        
        
        FastJsonConfig config = new FastJsonConfig();//采用默認 SerializerFeatures
        config.setSerializerFeatures(
                SerializerFeature.QuoteFieldNames,
                //SerializerFeature.WriteMapNullValue,
                SerializerFeature.WriteNullBooleanAsFalse,
                SerializerFeature.BrowserCompatible,
                SerializerFeature.WriteSlashAsSpecial,
                SerializerFeature.WriteDateUseDateFormat,
                SerializerFeature.DisableCircularReferenceDetect
        );
        fastJsonHttpMessageConverter.setFastJsonConfig(config);
        return fastJsonHttpMessageConverter;

    }
}