tomcat 处理url特殊字符

tomcat版本：7.0.93

报错信息如下：

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.InternalInputBuffer.parseRequestLine(InternalInputBuffer.java:194)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1050)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:317)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)

具体分析如下：

tomcat添加了对header请求头的验证，因请求路径中带有[]{}等字符，所以无法通过校验。

解决方案：

1、去除URL中的特殊字符；

2、使用 Post 方法提交数据

3、更换低版本的Tomcat来规避这种问题。

4、在 conf/catalina.properties 添加或者修改：

tomcat.util.http.parser.HttpParser.requestTargetAllow=|{}

该配置只对以上三种特定字符有效。

5、在 conf/server.xml <Connector> 节点下添加：

relaxedPathChars="|{}[],%"
relaxedQueryChars="|{}[],%"

如下：

<Connector port="8080" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443"
               relaxedPathChars="\"<>[\\]^`{|}"  
               relaxedQueryChars="\"<>[\\]^`{|}" />

如果是springboot项目则将webServerFactory方法加入到springboot启动类

@Configuration
public class TomcatConfig {

    @Bean
    public TomcatServletWebServerFactory webServerFactory() {
        TomcatServletWebServerFactory factory = new TomcatServletWebServerFactory();
        factory.addConnectorCustomizers((Connector connector) -> {
                connector.setProperty("relaxedPathChars", "\"<>[\\]^`{|}");
                connector.setProperty("relaxedQueryChars", "\"<>[\\]^`{|}");
        });
        return factory;
    }
}