Re: multipart/x-mixed

Subject: Re: multipart/x-mixed

From: Kevin Decker <email@hidden>

Date: Tue, 6 Dec 2005 09:24:30 -0500

Delivered-to: email@hidden

You're right, relying on connectionDidFinishLoading isn't appropriate for a multipart data source.

Here's the basic life-cycle of multipart/x-mixed-replace:

didRecieveResponse:

didReceiveData:

...

didReceiveData:

didRecieveResponse:

didReceiveData:

...

didReceiveData:

1 - connection:didReceiveResponse: passing the original response; this response will have a Content-Type of x-mixed-replace

2 - a second -connection:didReceiveResponse: when we get the delimiter for the start of data; this response will carry the correct Content-Type

3 - some number of -connection:didReceiveData: calls; these datas should be concatenated and represent the content of the first frame

4 - a new -connection:didReceiveResponse: call when we get the delimiter for the second frame; note that theoretically the Content-Type could change from the prior call. In practice, it does not, but that's because, well, servers don't do that

5 - some number of -connection:didReceiveData: calls containing the data for the new frame

And so on, repeat steps 4 & 5 ad nauseum.

This means in your didReceiveResponse method, if you have data, now would be the time to do any kind of processing on it. And once you've done that, and you're done with the data, make sure to clean up the old data, and prepare for the next set of data (eg., a new frame in an image)

Cheers,

Kevin

On Dec 6, 2005, at 5:34 AM, Jan DeVries wrote:

I am very, very new to webkit (and cocoa); first try. Books are on their way ;-)

Anyone know how to handle a 'Content-Type: multipart/x-mixed-replace' ?

I am trying NSURLConnection.
The question: how do you load the resulting data into an NSImage.
I get connectionDidFinishLoading only when the loading is finished. Which does not happen with multipart....
So i guess the question is: How can you detect when a part has been downloaded?

Or should i go for this with webView to? webView though, represents a whole web page where i only want one image in my app and fix its size.

Any help and pointer will be appreciated.
Thanks,
Jan

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References:

>multipart/x-mixed (From: Jan DeVries <email@hidden>)