macOS NSURLConnection and multipart/x-mixed-replace streams

[Nutter]

I'm trying to use NSURLConnection to access an MJPEG stream.

All that I've seen leads me to believe that my delegate should receive a connection:didReceiveResponse: message at the start of each new frame. Apple's documentation mentions this explicitly, and it's also described in this post to the Webkitsdk-dev mailing list:
http://lists.apple.com/archives/Webkitsdk-dev/2005/Dec/msg00036.html

However, it's not working like that for me. I'm getting one connection:didReceiveResponse: message, followed by an indefinite series of connection:didReceiveData: messages. Like this:

connection:didRecieveResponse:
connection:didReceiveData:
connection:didReceiveData:
connection:didReceiveData:
connection:didReceiveData:
... and so on.

The connection definitely isn't finishing or failing, and I'm continuing to receive data long after the first frame must have finished transmitting, but I never get another connection:didReceiveResponse: message. I've tried this with two different network cameras now, and the result is the same.

Does anyone have any idea why this is happening?

(I posted this question on the Cocoa-dev mailing list, but didn't get a response. I'm tearing my hair out over this, so if anyone has any experience at all with multipart streams and NSURLConnection, advice would be much appreciated!)

 

[Nutter]

For anyone interested, it looks like something is in fact broken with either the documentation or the implementation of this.

You will only get one response message for a multipart stream, followed by the raw data from the first boundary onwards. It's up to you to parse the stream for the headers and content of each part.

 

[adeesh]

I am new to COCOA. And i am trying to implement the Multipart parser but i am struck in making the buffer from the data and checking boundaries in this data.
Can you please send the code for the Multipart parser?

I will be very thankful to you for this.

Thanks
Adeesh Jain

 

[adeesh]

Please send me the code for multipart parser at jain.adeesh@gmail.com. Or please help me in resolving the issue.

You are our last hope. Please help us.