[GitHub] [incubator-dubbo] hewguo commented on issue #3445: dubbo2.7 中RestProtocol.java getContextPath实现方式更改后无法注册rest服务

["hewguo (GitHub)" <gi...@apache.org>]

一个最简单的rest例子：
```
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:dubbo="http://dubbo.apache.org/schema/dubbo"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                           http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
                           http://dubbo.apache.org/schema/dubbo
                           http://dubbo.apache.org/schema/dubbo/dubbo.xsd">

    <dubbo:application name="demo-provider" logger="slf4j"/>
    <dubbo:registry address="zookeeper://127.0.0.1:2181"/>

    <!-- use dubbo protocol to export service on port 20880 -->
    <dubbo:protocol name="dubbo" port="20880"/>
    <dubbo:protocol name="rest" port="8080" server="tomcat" />

    <bean id="demoService" class="com.nbport.dubbo.rest.ServiceImpl"/>
    <!-- declare the service interface to be exported -->
    <dubbo:service interface="com.nbport.dubbo.rest.ServiceFacade" ref="demoService" protocol="rest"/>

</beans>
```
--------
```
@Path("demo")
public class ServiceImpl implements ServiceFacade {

    @Override
    @Path("hello")
    @GET
    public String hello() {
        return "Hello World! ";
    }

    @Override
    @GET
    @Path("/error")
    public String error() {
        throw new RuntimeException();
    }
}
```
使用2.7.0的代码，在浏览器上是访问不到http://localhost:8080/demo/hello页面的，而用2.6.5的代码是可以的。代码跟了一下，2.7的代码getContextPath会返回接口的类名，如：“com.nbport.dubbo.rest.ServiceFacade”，而本例中原来版本返回的是“”。

[ Full content available at: https://github.com/apache/incubator-dubbo/issues/3445 ]
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