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From "Micael Padraig Og mac Grene" <caraun...@harbornet.com>
Subject Re: TC 4.0 newbie - servlet app won't run
Date Mon, 26 Nov 2001 17:13:54 GMT
Just a "preemptive question," Mark.  Is your servlet's class object really
called "myservlet.class" rather than, say, "MyServlet.class"?


-----Original Message-----
From: Mark <markd@bellsouth.net>
To: Tomcat Users List <tomcat-user@jakarta.apache.org>
Date: Monday, November 26, 2001 7:00 AM
Subject: Re: TC 4.0 newbie - servlet app won't run


>Thanks for your reply Scott, and thanks to your and Micael's responses I
>_believe_ I understand the relationship between the servlet naming/mapping
>and the associated html.  As Micael noted, one could put "pudding" in the
>url-pattern as long as the html was setup as ACTION="pudding".  But... how
>do the example servlets work when they don't seem to have any servlet
>mapping in the ..\examples\WEB-INF\web.xml?
>
>Even after all the advice, I *STILL* can't get my app to run - I still get
>a 404 error on the servlet. This seems like such a simple issue but I can
>NOT get past it.  I've even gone as far as downloading Tomcat 3.3, with the
>same result. Again, I know Tomcat is parsing my web.xml, because if I
>intentionally make a typo, the parser complains when Tomcat is started.
>
>To recap where I am:
>
>(a)  I have myservlet.class in the
>$CATALINA_HOME\webapps\myapp\WEB-INF\classes
>     directory.  The servlet has no associated package.
>(b)  The html is <FORM ACTION="/servlet/myservlet" method="POST">
>(c)  My $CATALINA_HOME\webapps\myapp\WEB-INF\web.xml is as follows:
>
>     <?xml version="1.0" encoding="ISO-8859-1"?>
>
>     <!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>
>         <servlet>
>             <servlet-name>myservlet</servlet-name>
>             <servlet-class>myservlet</servlet-class>
>         </servlet>
>         <servlet-mapping>
>             <servlet-name>myservlet</servlet-name>
>             <url-pattern>/servlet/myservlet</url-pattern>
>         </servlet-mapping>
>     </web-app>
>
>
>Am I still missing something?  This is driving me berserk...
>
>TIA. Mark.
>
>
>
>At 12:22 AM 11/22/2001 -0500, you wrote:
>>Mark,
>>
>>The servlet tag is used to assign a name to a particular servlet class
>>file.
>>
>> <servlet>
>>           <servlet-name>myservlet</servlet-name>
>>           <servlet-class>myservlet</servlet-class>
>>       </servlet>
>>
>>This would attempt to assign the name 'myservlet' to the class
>>'myservlet.class.'
>>
>>The servlet-mapping tag defines the pattern or 'location' of a named
>>servlet from the root of your context. This means that ....
>>
>><servlet-mapping>
>>           <servlet-name>myservlet</servlet-name>
>>           <url-pattern>/classes</url-pattern>
>>       </servlet-mapping>
>>
>>if this were the ROOT context, this would map your servlet at /classes
>>and your form action would need to be defined as
>>
>><FORM ACTION="/classes" method="POST">
>>
>>A more common mapping for servlets is
>>
>><servlet-mapping>
>>           <servlet-name>myservlet</servlet-name>
>>           <url-pattern>/servlet/myservlet</url-pattern>
>>       </servlet-mapping>
>>
>>which would have a coresponding form tag of
>>
>><FORM ACTION="/servlet/myservlet" method="POST">
>>
>>
>>~Scott
>>
>>Mark wrote:
>>
>>>I installed Tomcat 4.0.1 under Win 2k using JDK 1.3 and able to run the
>>>example servlets, but not my own.  My html displays and I can execute my
>>>JSPs, but a POST to a servlet does not work (this app has run under Forte
>>>and VA Java in the past).   I get a 404 error with "the requested
resource
>>>(/myservlet) is not available". Since the examples work, I have to assume
>>>it's something in my configuration. Any help figuring out why the servlet
>>>won't run would be *greatly* appreciated.  I suspect it's something
>>>simple/braindead on my part.
>>>
>>>
>>>o  My directory structure for the app:
>>>   TomcatHome
>>>        |
>>>        +--webapps
>>>              |
>>>              +--myapp\.jsp, .html .gif
>>>                 |
>>>                 +--WEB-INF\web.xml
>>>                       |
>>>                       +--classes\.class files
>>>
>>>
>>>o  My html POST stmt. I've tried various path prefixes to myservlet, eg
>
>>>   "classes/myservlet".  As with the Tomcat examples, this servlet has no
>>>   package:
>>>
>>>    <FORM ACTION="/myservlet" method="POST">
>>>
>>>
>>>o  My web.xml - I know Tomcat's seeing/parsing this because if I
>deliberately
>>>   make a typo I get an error upon startup:
>>>
>>>     <?xml version="1.0" encoding="ISO-8859-1"?>
>>>     <!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>
>>>       <!-- Define servlets that are included in the application -->
>>>       <servlet>
>>>           <servlet-name>myservlet</servlet-name>
>>>           <servlet-class>myservlet</servlet-class>
>>>       </servlet>
>>>       <servlet-mapping>
>>>           <servlet-name>myservlet</servlet-name>
>>>           <url-pattern>/classes</url-pattern>
>>>       </servlet-mapping>
>>>    </web-app>
>>>
>>>
>>>o  Update to server.xml
>>>
>>>   <Context path="/myapp" docBase="myapp" debug="0">
>>>       <Logger className="org.apache.catalina.logger.FileLogger"
>>>               prefix="myapp_log." suffix=".txt"
>>>               timestamp="true"/>
>>>   </Context>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
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>>>
>>>
>>
>>
>>
>>
>>
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>>
>
>
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