今天遇到一个问题，Spring Boot 项目，Boot版本1.5.9.RELEASE，内置tomcat版本为8.5.23，内置undertow.version为1.4.21.Final。
- 使用Tomcat时，可以添加中文值的Cookie
- 使用Undertow时会报错
1 Caused by: java.lang.IllegalArgumentException: UT000173: An invalid control character [31616] was present in the cookie value or attribute 2 at io.undertow.util.LegacyCookieSupport.isHttpSeparator(LegacyCookieSupport.java:149) ~[undertow-core-1.4.21.Final.jar:1.4.21.Final] 3 at io.undertow.util.LegacyCookieSupport.isHttpToken(LegacyCookieSupport.java:170) ~[undertow-core-1.4.21.Final.jar:1.4.21.Final] 4 at io.undertow.util.LegacyCookieSupport.adjustedCookieVersion(LegacyCookieSupport.java:255) ~[undertow-core-1.4.21.Final.jar:1.4.21.Final] 5 at io.undertow.server.Connectors.getCookieString(Connectors.java:154) ~[undertow-core-1.4.21.Final.jar:1.4.21.Final] 6 at io.undertow.server.Connectors.flattenCookies(Connectors.java:99) ~[undertow-core-1.4.21.Final.jar:1.4.21.Final] 7 at io.undertow.server.protocol.http.HttpResponseConduit.processWrite(HttpResponseConduit.java:161) ~[undertow-core-1.4.21.Final.jar:1.4.21.Final] 8 at io.undertow.server.protocol.http.HttpResponseConduit.write(HttpResponseConduit.java:596) ~[undertow-core-1.4.21.Final.jar:1.4.21.Final] 9 at io.undertow.conduits.AbstractFixedLengthStreamSinkConduit.write(AbstractFixedLengthStreamSinkConduit.java:106) ~[undertow-core-1.4.21.Final.jar:1.4.21.Final] 10 at org.xnio.conduits.ConduitStreamSinkChannel.write(ConduitStreamSinkChannel.java:150) ~[xnio-api-3.3.8.Final.jar:3.3.8.Final] 11 at io.undertow.channels.DetachableStreamSinkChannel.write(DetachableStreamSinkChannel.java:240) ~[undertow-core-1.4.21.Final.jar:1.4.21.Final] 12 at io.undertow.server.HttpServerExchange$WriteDispatchChannel.write(HttpServerExchange.java:2094) ~[undertow-core-1.4.21.Final.jar:1.4.21.Final] 13 at io.undertow.servlet.spec.ServletOutputStreamImpl.writeBufferBlocking(ServletOutputStreamImpl.java:573) ~[undertow-servlet-1.4.21.Final.jar:1.4.21.Final] 14 at io.undertow.servlet.spec.ServletOutputStreamImpl.flushInternal(ServletOutputStreamImpl.java:488) ~[undertow-servlet-1.4.21.Final.jar:1.4.21.Final] 15 at io.undertow.servlet.spec.ServletOutputStreamImpl.flush(ServletOutputStreamImpl.java:475) ~[undertow-servlet-1.4.21.Final.jar:1.4.21.Final] 16 at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297) ~[?:1.8.0_131] 17 at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) ~[?:1.8.0_131] 18 at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) ~[?:1.8.0_131] 19 at org.springframework.util.StreamUtils.copy(StreamUtils.java:119) ~[spring-core-4.3.13.RELEASE.jar:4.3.13.RELEASE] 20 at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:106) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] 21 at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:41) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] 22 at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:227) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] 23 at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:247) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] 24 at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor.java:174) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] 25 at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:81) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] 26 at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:113) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] 27 at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] 28 at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] 29 at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] 30 at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] 31 at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] 32 at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] 33 ... 59 more