tomcat8中URI不支持{}|等特殊字符解决方案

1. 问题描述

Note: further occurrences of HTTP header parsing errors will be logged at DEBUG level.

java.lang.IllegalArgumentException: Invalid character found in the request target. The valid characters are defined in RFC 7230 and RFC 3986
        at org.apache.coyote.http11.Http11InputBuffer.parseRequestLine(Http11InputBuffer.java:472) ~[tomcat-embed-core-8.5.15.jar!/:8.5.15]
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:683) ~[tomcat-embed-core-8.5.15.jar!/:8.5.15]
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.15.jar!/:8.5.15]
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861) [tomcat-embed-core-8.5.15.jar!/:8.5.15]
        at  [tomcat-embed-core-8.5.15.jar!/:8.5.15]
        at  [tomcat-embed-core-8.5.15.jar!/:8.5.15]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_131]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_131]
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.15.jar!/:8.5.15]
        at java.lang.Thread.run(Thread.java:748) [na:1.8.0_131]

2. 原因

由于tomcat 新版本 增加一个特性: 严格按照RFT 3986规范定义了Url

RFC规范

Url中只允许包含英文字母（a-zA-Z）、数字（0-9）、-_.~4个特殊字符以及所有保留字符(RFC3986中指定了以下字符为保留字符：! * ’ ( ) ; : @ & = + $ , / ? # [ ])

3. 解决方案

4. Spring Boot 内嵌tomcat的个人解决方案

在SpringBootApplication的的main方法中增加

 System.setProperty("tomcat.util.http.parser.HttpParser.requestTargetAllow","|{}");

备注: 该方案能解决部分支持|{},对其他特殊字符没法支持

5. 延伸及参考