[Seaside] requestContext and extra data in the output

Tue Nov 23 07:01:38 UTC 2010

Philippe,

Yes, I see now after reading the manual a little closer this evening, that what I wanted was a WARequestHandler. Once I moved to using that, my problems were solved. Thanks for the feedback

-Brian

Sent from my iPhone

On Nov 22, 2010, at 11:32 PM, Philippe Marschall <philippe.marschall at gmail.com> wrote:

> 2010/11/22 Brian Tabone <brian.tabone at gmail.com>:
>> My question is about extra data I am seeing when using the
>> requestContext to send back JSon data for a web service.
>> 
>> I am using Seaside 3.0 in Pharo 1.1
>> 
>> My renderContentOn:html method is:
>> 
>> renderContentOn: html
>>        | resultDictionary |
>>        self requestContext
>>                respond: [:response |
>>                        resultDictionary := Dictionary new.
>>                        createError isNil
>>                                ifTrue: [resultDictionary at: #listName put: listName.
>>                                        resultDictionary at: #listUUID put: todoList uuid asString]
>>                                ifFalse: [resultDictionary at: #error put: createError class asString.
>>                                        resultDictionary at: #reason put: createError asString].
>>                        response contentType: 'application/json'.
>>                        response nextPutAll: resultDictionary asJson].
>> 
>> When I call the url for this web service, I get (here is the verbose
>> output from curl)
>> 
>> curl -v http://localhost:8081/createList
>> * About to connect() to localhost port 8081 (#0)
>> *   Trying 127.0.0.1... connected
>> * Connected to localhost (127.0.0.1) port 8081 (#0)
>>> GET /createList HTTP/1.1
>>> User-Agent: curl/7.19.7 (universal-apple-darwin10.0) libcurl/7.19.7 OpenSSL/0.9.8l zlib/1.2.3
>>> Host: localhost:8081
>>> Accept: */*
>>> 
>> < HTTP/1.1 200 OK
>> < Date: Mon, 22 Nov 2010 21:17:48 GMT
>> < Connection: close
>> < Server: KomHttpServer/7.1.3 (Mac OS)
>> < Content-type: application/json
>> < Content-length: 465
>> <
>> * Closing connection #0
>> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
>> "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html
>> xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"
>> lang="en"><head><title>Seaside</title><meta http-equiv="Content-Type"
>> content="text/html;charset=utf-8"/><meta
>> http-equiv="Content-Script-Type"
>> content="text/javascript"/></head><body
>> onload="onLoad()">{"reason":"MessageNotUnderstood: receiver of
>> \"asSymbol\" is nil","error":"MessageNotUnderstood"}
>> 
>> Long story short, How do I get rid of the <html header data that is in
>> the buffer before I get a hold of the response to put my JSon data in
>> the stream? Should I re-initialize the response with a fresh buffer?
> 
> Nope. You're in the render phase, you should render HTML. If you want
> to return JSON you can do that in the callback phase. If you're
> building a web service you shouldn't use components at all.
> 
> Cheers
> Philippe
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