jsonp

[shlomo bauer]

I need to have one of my webpy services return jsonp

serializing into a json string is easy enough.

I can't wrap the response in the jquery callback value - and I have no clue how to get the value.

I can't find any documentation.

Help.

thanks

[Pradeep Banavara]

I haven't done this myself yet but it's as simple as wrapping the serialized JSON in an object, In python I don't believe there is a concept of a 'callback'. jQuery's callback = a python object. I may be wrong though.

-pradeep

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[anh le]

Hello,

I think return jsonp is something like this:

url: .../somepage?callback=bar

class SomePage:

    def GET(self):

        callback = web.input(callback='default_callbackname') 

        web.header('Content-type', 'application/javascript')

        data = json.dumps({'a': 'foo'}) ' # or call some func that return serialized data

        content = str(callback) + '(' + data  + ')' 

        return content

Just the quick outline I haven't test this yet.

[Shannon Cruey]

My function is too long to paste here, but this is the (untested) relevant lines.  I have jsonp callback working with jquery ajax.

def GET(self, method):
        args = web.input()
        web.header('Content-Type', 'application/json')

        payload = json.dumps({'a': 'foo'}) ' # or call some func that return serialized data
        return "%s('%s')" % (args["callback"], payload)

I can't find my jquery example, but basically it executes the command you got back.  callbackfunc(jsondata);

[Anand Chitipothu]

On Fri, Mar 8, 2013 at 2:59 AM, Shannon Cruey
<shanno...@cloudsidekick.com> wrote:
> My function is too long to paste here, but this is the (untested) relevant
> lines. I have jsonp callback working with jquery ajax.
>
> def GET(self, method):
> args = web.input()
> web.header('Content-Type', 'application/json')
> payload = json.dumps({'a': 'foo'}) ' # or call some func that return
> serialized data
> return "%s('%s')" % (args["callback"], payload)
>
> I can't find my jquery example, but basically it executes the command you
> got back. callbackfunc(jsondata);

That is the typical pattern that I follow too.

json = simplejson.dumps(result)
web.header('Content-Type', 'text/javascript')
if i.callback:
return "%s(%s);" % (i.callback, json)
else:
return json

Here is a complete example.

https://github.com/internetarchive/openlibrary/blob/master/openlibrary/coverstore/code.py#L422

Anand