how to deploy GWT app to tomcat

Question

I searched this site for answer to this question and couldn't find a solution. what i did is that i simply compress the war directory in my eclipse GWT app project then rename it to .war then drop it to tomcat webapps folder. when i run the web app, the first screen is successfully shown but when i call a servlet within my src code it gives me resource not found by tomcat server. i'm sure i have added entry for servlet in web.xml file and the app worked well when i run it in eclipse gwt dev mode. something prevent my servlets (standard servlets not GWT RPC servlets) to be found and executed by tomcat. what could be the reason?

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UPDATE

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
    "http://java.sun.com/dtd/web-app_2_3.dtd">

<web-app>

  <!-- Servlets -->

  <servlet>
        <servlet-name>OAuth</servlet-name>
        <servlet-class>org.goauth.server.OAuthServlet</servlet-class>

    </servlet>
    <servlet-mapping>
        <servlet-name>OAuth</servlet-name>
        <url-pattern>/goauth/oauth</url-pattern>
    </servlet-mapping>
     <servlet>
        <servlet-name>OAuthCallback</servlet-name>

        <servlet-class>org.goauth.server.OAuthCallbackServlet</servlet-class>

    </servlet>
    <servlet-mapping>
        <servlet-name>OAuthCallback</servlet-name>
        <url-pattern>/goauth/callback</url-pattern>
    </servlet-mapping>
    <servlet>
        <servlet-name>service</servlet-name>

        <servlet-class>org.goauth.server.OAuthServiceImpl</servlet-class>

    </servlet>
    <servlet-mapping>
        <servlet-name>service</servlet-name>
        <url-pattern>/goauth/service</url-pattern>
    </servlet-mapping>
    <servlet>
        <servlet-name>OAuthConfirm</servlet-name>
        <servlet-class>org.goauth.server.OAuthConfirmServlet</servlet-class>

    </servlet>
    <servlet-mapping>
        <servlet-name>OAuthConfirm</servlet-name>
        <url-pattern>/goauth/confirm</url-pattern>
    </servlet-mapping>
  <!-- Default page to serve -->
  <welcome-file-list>
    <welcome-file>GOAuth.html</welcome-file>
  </welcome-file-list>    
</web-app>

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Error

nothing in tomcate logs files the only error in browser is :

HTTP Status 404 - /goauth/oauth

type Status report

message /goauth/oauth

description The requested resource (/goauth/oauth) is not available.
Apache Tomcat/6.0.20

Answer 1

I found the problem : for invoking my servlet i was calling a url of the format : "/goauth/OAuth" this worked with eclipse gwt plugin in dev mode but not when i deploy war to tomcat server. the solution is that my url pointing to my servlet should be of the form :

String href = GWT.getHostPageBaseURL()+"goauth/OAuth";

so we need to tell tomcat the full url by prefixing servlet url with GWT.getHostPageBaseURL().

Answer 2

Take a look at how to create a GWT .war in eclipse: http://blog.elitecoderz.net/gwt-and-tomcat-create-war-using-eclipse-to-deploy-war-on-tomcat/2009/12/