Is there anyone here who has successfully gotten Jython 2.5.0 to work with GAE? I was able to make modjy work with it, but I would rather not use modjy. I'm building a small site from scratch, and want to use PyServlet, but I am running into a snag -- after I set everything up, instead of processing my python code, the server is simply giving me my .py file to download.

I can get more specifics if needed.

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Hi Cliff-

The Google App Engine is a bit weird with the PyServlet as it does not want to handle the .py file as code, but rather as text like you had mentioned.  You should add your .py code to the appengine-web.xml file as "static files" and then set up the PyServlet in your web.xml as usual (mapped to url-pattern of *.py).

Suppose my Jython servlet name is NewJythonServlet.py and the path on my OS to the file is /Jython-code/servlets/NewJythonServlet.py, I will need to set up my appengine-web.xml as follows:

<?xml version="1.0" encoding="UTF-8"?>

<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">

    <application>MyJythonApp</application>

    <version>1</version>

    <static-files>

        <include path="/Jython-code/servlets/NewJythonServlet.py"/>

    </static-files>

    <sessions-enabled>true</sessions-enabled>

</appengine-web-app>

Once this is completed, you can deploy to GAE and run as follows http://gae-server:8080/NewJythonServlet.py

Let me know if this works out for you.

Josh Juneau
juneau001 <at> gmail.com
http://jj-blogger.blogspot.com
Twitter ID:  javajuneau

On Sat, Aug 1, 2009 at 7:11 AM, Cliff Hill <xlorep <at> darkhelm.org> wrote:

Is there anyone here who has successfully gotten Jython 2.5.0 to work with GAE? I was able to make modjy work with it, but I would rather not use modjy. I'm building a small site from scratch, and want to use PyServlet, but I am running into a snag -- after I set everything up, instead of processing my python code, the server is simply giving me my .py file to download.

I can get more specifics if needed.

--
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Website: http://darkhelm.org

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Here's exactly what I am trying to do:

Jython 2.5.0 on Google Apps Engine/Java

Using Eclipse 3.4 (Ganymede) with:

• Pydev plugin
• Google plugin

My thoughts:

1. I make a Web Application Project in Eclipse (Name: Guestbook, package: guestbook) with the Google plugin, using the Java API.
2. I convert the project into a Pydev project

• Set grammar to 2.5, and select Jython

I copy the jython.jar into war/WEB-INF/lib

I zip up the Jython library (Lib folder) into Lib.zip

• I make a text file called "all.pth" with a single line of "Lib.zip" in it.

I create a war/WEB-INF/lib-python folder and place the Lib.zip and all.pth files in it.

I modify the war/WEB-INF/web.xml to the following:

<?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 xmlns="http://java.sun.com/xml/ns/javaee" version="2.5">
    <servlet>
        <servlet-name>PyServlet</servlet-name>
        <servlet-class>org.python.util.PyServlet</servlet-class>
        <init-param>
            <param-name>python.home</param-name>
            <param-value>WEB-INF/lib-python</param-value>
        </init-param>
        <init-param>
            <param-name>python.cachedir.skip</param-name>
            <param-value>true</param-value>
        </init-param>
    </servlet>
   
    <servlet-mapping>
        <servlet-name>PyServlet</servlet-name>
        <url-pattern>*.py</url-pattern>
    </servlet-mapping>
   
    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
    </welcome-file-list>
</web-app>

Then I started writing my Jython code. I tried something simple (deriving from the tutorial Google provided for Java, I'm making a Jython equivalent of the Guestbook app, I made a file Guestbook.py which starts off as a Hello, World app):

import javax

class Guestbook(javax.servlet.http.HttpServlet):

    def doGet(self, req, resp):
        resp.contentType = "text/plain"
        resp.writer.println("Hello, World")

I saved it under the war folder

I then did Debug As -> "Web Application" which fires up the development environment server to test with. When I tried to run my servlet with the following:

http://localhost:8080/Guestbook.py

It just gives me the python source file to download.

So, then trying Josh's suggestion, I modified the file war/WEB-INF/appengine-web.xml as follows:

<?xml version="1.0" encoding="utf-8"?>

<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">

    <application>myapp</application>

    <version>1</version>
   
    <static-files>

        <include path="/Guestbook.py"/>
    </static-files>
   
    <!-- Configure java.util.logging -->
    <system-properties>
        <property name="java.util.logging.config.file" value="WEB-INF/logging.properties"/>
    </system-properties>
   
</appengine-web-app>

I tried the same link as above, same result.

When I made a folder called war/guestbook and placed the Guestbook.py file in it, and went to the following link instead:
http://localhost:8080/guestbook/Guestbook.py it worked!

When I tried uploading it to Google, it didn't, giving the error I showed previously:

The request method GET is inappropriate for the URL /Guestbook.py

So now I'm stuck again...

On Sat, Aug 1, 2009 at 1:42 PM, Cliff Hill <xlorep <at> darkhelm.org> wrote:

Curiously enough, my solution works when I run it locally in a test environment, but results in an error 405 on the GAE servers with the message:

The request method GET is inappropriate for the URL /Guestbook.py

So I'm a bit stumped again.

My solution was, when I made the web application project in Eclipse (using the Google plugin), and then converted it into a Pydev application using Jython, I copied the jython.jar into my war/WEB-INF/lib folder, and I made a war/WEB-INF/lib-python folder like modjy, with the Lib.zip and all.pth files it uses in their own examples, I set up the web.xml file with the python.path setting pointing to the lib-python folder, and I added your suggestion for the static-files option, with an include path of: "/Guestbook.py" (I'm trying to duplicate Google's example for Java apps, only in Jython). To make it work, I had to make a war/WEB-INF/guestbook folder, and put my Guestbook.py in that folder, and then I could point my browser to: http://localhost:8080/guestbook/Guestbook.py and it worked. When I tried to put it to the production server, it didn't work (even changing the include path like you suggested), either it tries to give me the python file to download, or it does the error I outlined above.

On Sat, Aug 1, 2009 at 1:25 PM, Josh Juneau <juneau001 <at> gmail.com> wrote:

Cliff-

Can you share your solution with us?  It would be great to document.
The solution I showed you worked in my environment on the app engine
dev server.

Thanks

On 8/1/09, Cliff Hill <xlorep <at> darkhelm.org> wrote:
> I tried what you said, and it didn't work. however, I seem to have made it
> work now, without needing that. Thanks.
>
> On Sat, Aug 1, 2009 at 9:33 AM, Josh Juneau <juneau001 <at> gmail.com> wrote:
>
>> Cliff-
>> I forgot to mention that your statically mapped files can be URLs as
>> well.
>>  So for testing purposes on your machine the appengine-web.xml that I
>> gave
>> you previously would work.  However, to deploy to the cloud you will need
>> to
>> use the URL to your .py files instead.  For instance:
>>
>> <?xml version="1.0" encoding="UTF-8"?>
>> <appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
>>     <application>MyJythonApp</application>
>>     <version>1</version>
>>     <static-files>
>>         <include path="http://localhost:8080/NewJythonServlet.py"/>
>>      </static-files>
>>     <sessions-enabled>true</sessions-enabled>
>> </appengine-web-app>
>>
>> Of course,
>> when you deploy the app then the URL should match that of your
>> application.
>>
>>
>> Josh Juneau
>> juneau001 <at> gmail.com
>> http://jj-blogger.blogspot.com
>> Twitter ID:  javajuneau
>>
>>
>> On Sat, Aug 1, 2009 at 10:28 AM, Josh Juneau <juneau001 <at> gmail.com> wrote:
>>
>>> Hi Cliff-
>>> The Google App Engine is a bit weird with the PyServlet as it does not
>>> want to handle the .py file as code, but rather as text like you had
>>> mentioned.  You should add your .py code to the appengine-web.xml file
>>> as
>>> "static files" and then set up the PyServlet in your web.xml as usual
>>> (mapped to url-pattern of *.py).
>>>
>>> Suppose my Jython servlet name is NewJythonServlet.py and the path on my
>>> OS to the file is /Jython-code/servlets/NewJythonServlet.py, I will need
>>> to
>>> set up my appengine-web.xml as follows:
>>>
>>> <?xml version="1.0" encoding="UTF-8"?>
>>> <appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
>>>     <application>MyJythonApp</application>
>>>     <version>1</version>
>>>     <static-files>
>>>         <include path="/Jython-code/servlets/NewJythonServlet.py"/>
>>>     </static-files>
>>>     <sessions-enabled>true</sessions-enabled>
>>> </appengine-web-app>
>>>
>>> Once this is completed, you can deploy to GAE and run as follows
>>> http://gae-server:8080/NewJythonServlet.py
>>>
>>> Let me know if this works out for you.
>>>
>>> Josh Juneau
>>> juneau001 <at> gmail.com
>>> http://jj-blogger.blogspot.com
>>> Twitter ID:  javajuneau
>>>
>>>
>>> On Sat, Aug 1, 2009 at 7:11 AM, Cliff Hill <xlorep <at> darkhelm.org> wrote:
>>>
>>>> Is there anyone here who has successfully gotten Jython 2.5.0 to work
>>>> with GAE? I was able to make modjy work with it, but I would rather not
>>>> use
>>>> modjy. I'm building a small site from scratch, and want to use
>>>> PyServlet,
>>>> but I am running into a snag -- after I set everything up, instead of
>>>> processing my python code, the server is simply giving me my .py file
>>>> to
>>>> download.
>>>>
>>>> I can get more specifics if needed.
>>>>
>>>> --
>>>> "I'm not responcabel fer my computer's spleling errnors" - Xlorep
>>>> DarkHelm
>>>> Website: http://darkhelm.org
>>>>
>>>>
>>>>
>>>> ------------------------------------------------------------------------------
>>>> Let Crystal Reports handle the reporting - Free Crystal Reports 2008
>>>> 30-Day
>>>> trial. Simplify your report design, integration and deployment - and
>>>> focus on
>>>> what you do best, core application coding. Discover what's new with
>>>> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
>>>> _______________________________________________
>>>> Jython-users mailing list
>>>> Jython-users <at> lists.sourceforge.net
>>>> https://lists.sourceforge.net/lists/listinfo/jython-users
>>>>
>>>>
>>>
>>
>
>
> --
> "I'm not responcabel fer my computer's spleling errnors" - Xlorep DarkHelm
> Website: http://darkhelm.org
> Sent from Santa Maria, California, United States
>

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Josh Juneau
juneau001 <at> gmail.com
http://jj-blogger.blogspot.com
Twitter ID:  javajuneau

--

"I'm not responcabel fer my computer's spleling errnors" - Xlorep DarkHelm
Website: http://darkhelm.org
Sent from Santa Maria, California, United States

--

"I'm not responcabel fer my computer's spleling errnors" - Xlorep DarkHelm
Website: http://darkhelm.org
Sent from Santa Maria, California, United States

--

"I'm not responcabel fer my computer's spleling errnors" - Xlorep DarkHelm
Website: http://darkhelm.org
Sent from Santa Maria, California, United States

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