-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Jim Washington wrote:

So, I have a need to put together a more elaborate web page. Lots of pop-up dialog boxes and dynamically-updated choice lists. How to do that?

I take a look at Pyjamas http://pyjs.org. Pretty cool.

Here's the theory. Write fancy application web page in python using the Pyjamas/GWT API, then "compile" it to javascript. Serve it through zope, which will handle auth/auth. Client-server communication flows through json-rpc calls. What could possibly go wrong?

First-off, just a simple test-of-concept. Edit the JSONRPCExample.py file in the examples/jsonrpc folder that came with pyjamas.

I'll locate the jsonrpc service in zope's containment root, so I change the uri in EchoServicePython from "/services/EchoService.py" to "/". That's all I need to change. Compile it using the handy "build.sh" that's in the same folder. Look in the "output" folder and see what we got.

Wow. a bunch of files.

JSONRPCExample.IE6.cache.html Mozilla.cache.html OldMoz.cache.html Opera.cache.html Safari.cache.html JSONRPCExample.html JSONRPCExample.nocache.html corner_dialog_bottomleft.png corner_dialog_bottomleft_black.png corner_dialog_bottomright.png corner_dialog_bottomright_black.png corner_dialog_edge.png corner_dialog_edge_black.png corner_dialog_topleft.png corner_dialog_topleft_black.png corner_dialog_topright.png corner_dialog_topright_black.png history.html pygwt.js tree_closed.gif tree_open.gif tree_white.gif

I'm lazy, so instead of doing a bunch of resource or view directives in ZCML, I let my paste.ini do the handling.

[app:pyjs1] use=egg:Paste#static document_root=/home/jwashin/projects/pyjamas/pyjamas-0.4/examples/jsonrpc/output

then, I link that in with the composite app.

[composite:Paste.Main] use = egg:Paste#urlmap / = zope /images = images /pyjs1 = pyjs1

Now, to get to JSONRPCExample.html, I need to go to http://website/pyjs1/JSONRPCExample.html

But first, I need to actually handle the json-rpc requests in zope.

Make a servicetest.py. Almost exactly similar to EchoService.py in the output/services folder.

from zif.jsonserver.jsonrpc import MethodPublisher class Services(MethodPublisher): def echo(self, msg): return msg def reverse(self, msg): return msg[::-1] def uppercase(self, msg): return msg.upper() def lowercase(self, msg): return msg.lower()

Now, a ZCML incantation.

<jsonrpc:view for="zope.app.folder.interfaces.IRootFolder" permission="zope.Public" methods="echo reverse uppercase lowercase" class = ".servicetest.Services" />

Start zope, and go to http://website/pyjs1/JSONRPCExample.html

Nice page. Click the "Send to Python Service" button.

Server Error or Invalid Response: ERROR 0 - Server Error or Invalid Response

Damn.

Pull up tcpwatch and see what we are getting. Aha. pyjamas app is sending jsonrpc with a content-type of application/x-www-form-urlencoded, so zope is not handing it off to zif.jsonserver for handling.

Fix pyjamas or let zif.jsonserver handle this content-type?

In zif.jsonserver's configure.zcml, in the "publisher" directive, add application/x-www-form-urlencoded to mimetypes.

Restart zope. Go to http://website/pyjs1/JSONRPCExample.html

It works.

Change permissions in the jsonrpc:view directive. Restart zope.

Go to the page. Page loads. Push the button, and I get a Basic HTTP Authentication dialog. Nice.

Overall Results: So far, so good. :)

Thanks for the tour. I've been meaning to look at Pyjamas. Tres. - -- =================================================================== Tres Seaver +1 540-429-0999 tseaver@palladion.com Palladion Software "Excellence by Design" http://palladion.com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFJTPQc+gerLs4ltQ4RAn7VAJ93BFtVweq7gYzUT5MddY8os2t6IQCeNyZc fPZjWcVLWSAml/SJI6QerYU= =nGR+ -----END PGP SIGNATURE-----