基于CamelRest路径的路由

Question

http://north.acme.com/flowdocv2/rest/repository/attachment/{id}/findById
http://center.acme.com/flowdocv2/rest/repository/attachment/{id}/findById
http://south.acme.com/flowdocv2/rest/repository/attachment/{id}/findById

我的目标是开发一个单一的骆驼路线来映射这些服务器，接受路径中服务器的名称。类似于这样：

http://my.camel.com/center/repository/attachment/{id}/findById
http://my.camel.com/north/repository/attachment/{id}/findById
http://my.camel.com/south/repository/attachment/{id}/findById

我的（简化且不起作用）Blueprint.xml：

<?xml version="1.0" encoding="UTF-8"?>
<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0"
    xmlns:cm="http://aries.apache.org/blueprint/xmlns/blueprint-cm/v1.0.0"
    xmlns:cxf="http://camel.apache.org/schema/blueprint/cxf"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"      
    xsi:schemaLocation="http://www.osgi.org/xmlns/blueprint/v1.0.0    
    https://www.osgi.org/xmlns/blueprint/v1.0.0/blueprint.xsd  
    http://camel.apache.org/schema/blueprint http://camel.apache.org/schema/blueprint/camel-blueprint.xsd">

<cm:property-placeholder persistent-id="my.config.file"/>

<reference id="sharedNettyHttpServer" interface="org.apache.camel.component.netty4.http.NettySharedHttpServer"/>

<camelContext id="my_context" xmlns="http://camel.apache.org/schema/blueprint">
    <restConfiguration component="netty4-http">
        <endpointProperty key="nettySharedHttpServer" value="#sharedNettyHttpServer"/>
    </restConfiguration>
    <rest path="/center/repository">
        <get uri="/attachment/{attachmentId}/findById">
            <route streamCache="true" trace="true">
                <to uri="http://center.acme.com/flowdocv2/rest?bridgeEndpoint=true"/>
            </route>
        </get>            
    </rest>
    <rest path="/north/repository">
        <get uri="/attachment/{attachmentId}/findById">
            <route streamCache="true" trace="true">
                <to uri="http://north.acme.com/flowdocv2/rest?bridgeEndpoint=true"/>
            </route>
        </get>            
    </rest>
</camelContext>
</blueprint>

问题是，我不知道如何从路径中移除/center、/north或/south,因此头部被传递给目标服务，而目标服务不知道如何处理它。调用：

http://my.camel.com/center/repository/attachment/{id}/findById

http://center.acme.com/flowdocv2/rest/center/repository/attachment/{id}/findById

Answer 1

我觉得其实容易一点。只要您不坚持netty，并且使用的是Camel2.11+，就可以使用camel-urlrewrite

基本上，您在配置中定义一个重写规则，并将其添加到路由包中。

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE urlrewrite PUBLIC "-//tuckey.org//DTD UrlRewrite 4.0//EN"
    "http://www.tuckey.org/res/dtds/urlrewrite4.0.dtd">
    <urlrewrite>
        <rule>
            <name>Generic Proxy</name>
            <note>
                This rule completely rewrites the url to call.
                Basically, in Camel's "to", you could write whatever you want
            </note>
            <from>^/(.*?)/(.*)</from>
            <to>http://$1.acme.com/flowdocv2/rest/$2</to>
        </rule>
    </urlrewrite>

现在，您可以使用一个相当简单的路线：

<?xml version="1.0" encoding="UTF-8"?>
<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0" xmlns:cm="http://aries.apache.org/blueprint/xmlns/blueprint-cm/v1.0.0" xmlns:cxf="http://camel.apache.org/schema/blueprint/cxf" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.osgi.org/xmlns/blueprint/v1.0.0    
    https://www.osgi.org/xmlns/blueprint/v1.0.0/blueprint.xsd  
    http://camel.apache.org/schema/blueprint http://camel.apache.org/schema/blueprint/camel-blueprint.xsd">

    <bean id="myRewrite" class="org.apache.camel.component.urlrewrite.HttpUrlRewrite">
        <property name="configFile" value="class/path/to/proxyrewrite.xml" />
    </bean>

    <camelContext id="my_context" xmlns="http://camel.apache.org/schema/blueprint">
        <route id="proxyRoute">
            <from uri="jetty:http://localhost:9090/proxy" />
            <to uri="jetty:http://somewhere/myapp2?bridgeEndpoint=true&amp;throwExceptionOnFailure=false&amp;urlRewrite=#myRewrite" />
        </route>
    </camelContext>
</blueprint>