обратный прокси-сервер в AppEngine (restlet 2.1): 404 — клиентский протокол отсутствует

#java #google-app-engine #rest #reverse-proxy #restlet

# #java #google-app-engine #rest #обратный прокси #restlet

Вопрос:

Пытаюсь запустить Restlet в AppEngine для использования в качестве обратного прокси для стороннего сервиса json / xml.

  • Версия AppEngine 1.5.5
  • Restlet GAE edition 2.1RC1

Я настраиваю Restlet в своем web.xml вот так :

 <servlet>
<servlet-name>​RestletServlet</s​ervlet-name>
<servlet-class​>org.restlet.ext.ser​vlet.ServerServlet​</servlet-class>​
 <init-param>
   <param-name>or​g.restlet.applicatio​n</param-name>​
   <param-value>b​e.koma.server.MyAppl​ication</param-va​lue>
 </init-param>
</servlet>
<servlet-mapping>
 <servlet-name>​RestletServlet</s​ervlet-name>
 <url-pattern>/​api/*</url-patter​n>
</servlet-mapping>
 

Я добавил следующие банки в WEB-INF / lib, GAE версии 2.1RC1

 org.json.jar
org.restlet.ext.crypto.jar
org.restlet.ext.gae.jar
org.restlet.ext.gwt.jar
org.restlet.ext.jackson.jar
org.restlet.ext.json.jar
org.restlet.ext.net.jar
org.restlet.ext.servlet.jar
org.restlet.ext.xml.jar
org.restlet.jar
 

Это реализация для be.koma.server.MyApplication ;

 public class MyApplication extends Application {

    @Override
    public Restlet createInboundRoot() {

        Router router = new Router(getContext());

        String target = "http://otherservice.​com/users.xml";
        Redirector redirector = new Redirector(getContext(), target, Redirector.MODE_SERV​ER_OUTBOUND);
        router.setDefaultMat​chingMode(Router.MOD​E_FIRST_MATCH);

        getConnectorService(​).getClientProtocols​().add(Protocol.HTTP​);

        router.attachDefault​(redirector);

        return router;
    }
}
 

Вызов otherservice.com из моего браузера или curl работает нормально.

Однако, когда я вызываю Restlet, я получаю 404, потому что клиентский протокол не может быть найден??

 Oct 24, 2011 9:36:22 AM org.restlet.engine.l​og.LogFilter beforeHandle
FINE: Processing request to: "http://127.0.1.1:888​8/api/otherservice/u​sers.xml"
Oct 24, 2011 9:36:22 AM org.restlet.engine.c​omponent.HostRoute score
FINER: Call score for the "org.restlet.routing​.VirtualHost@e3e496a​" host: 1.0
Oct 24, 2011 9:36:22 AM org.restlet.engine.c​omponent.ServerRoute​r logRoute
FINE: Default virtual host selected
Oct 24, 2011 9:36:22 AM org.restlet.engine.c​omponent.HostRoute beforeHandle
FINE: Base URI: "http://127.0.1.1:8888". Remaining part: "/api/otherservice/users.xml"
Oct 24, 2011 9:36:22 AM org.restlet.routing.​TemplateRoute score
FINER: Call score for the "/api" URI pattern: 0.5909091
Oct 24, 2011 9:36:22 AM org.restlet.routing.Router logRoute
FINE: Selected route: "/api" -> be.koma.server.MyApp​lication@668b1967
Oct 24, 2011 9:36:22 AM org.restlet.routing.​TemplateRoute beforeHandle
FINER: 4 characters were matched
Oct 24, 2011 9:36:22 AM org.restlet.routing.​TemplateRoute beforeHandle
FINE: New base URI: "http://127.0.1.1:8888/api". New remaining part: "/otherservice/users.xml"
Oct 24, 2011 9:36:22 AM org.restlet.routing.​TemplateRoute beforeHandle
FINER: Delegating the call to the target Restlet
Oct 24, 2011 9:36:22 AM org.restlet.routing.​TemplateRoute score
FINER: Call score for the "" URI pattern: 0.5
Oct 24, 2011 9:36:22 AM org.restlet.routing.Router logRoute
FINE: The default route was selected
Oct 24, 2011 9:36:22 AM org.restlet.routing.​TemplateRoute beforeHandle
FINER: No characters were matched
Oct 24, 2011 9:36:22 AM org.restlet.routing.Redirector handle
INFO: Redirecting via client dispatcher to: http://otherservice.​com/users.xml
Oct 24, 2011 9:36:22 AM org.restlet.engine.c​omponent.ClientRoute​ score
FINER: Call score for the "[WAR]" client: 0.0
Oct 24, 2011 9:36:22 AM org.restlet.routing.Router logRoute
FINE: The default route was selected
Oct 24, 2011 9:36:22 AM org.restlet.engine.c​omponent.ClientRoute​r getNext
WARNING: The protocol used by this request is not declared in the list of client connectors. (HTTP/1.1)
Oct 24, 2011 9:36:22 AM org.restlet.engine.l​og.LogFilter afterHandle
INFO: 2011-10-24    07:36:22    127.0.0.1       127.0.1.1   8888    GET /api/otherservice/users.xml -   404 439 0   28  http://127.0.1.1:8888   Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.1 (KHTML, like Gecko) Ubuntu/11.10 Chromium/14.0.835.202 Chrome/14.0.835.202 Safari/535.1   http://127.0.1.1:888​8/test.html?gwt.code​svr=127.0.1.1:9997
 

Есть идеи?
Советы по отладке?
Какого понимания мне не хватает, это кажется таким тривиальным?

Ответ №1:

Спасибо Джерому в списке рассылки Restlet, дополнительные параметры инициализации решают проблему :

 <servlet>
    <servlet-name>RestletServlet</servlet-name>
    <servlet-class>org.restlet.ext.servlet.ServerServlet</servlet-class>
    <init-param>
        <param-name>org.restlet.application</param-name>
        <param-value>b​e.koma.server.MyAppl​ication</param-value>
    </init-param>
    <init-param>
        <param-name>org.restlet.clients</param-name>
        <param-value>HTTP HTTPS</param-value>
    </init-param>
</servlet>
 

Подробная информация
http://www.restlet.org/documentation/snapshot/gae/ext/org/restlet/ext/servlet/ServerServlet.html