在iOS上使用MKNetworkKit流式传输

Question

I'm trying to figure out how to make MKNetworkKit working with data from stream. I can see that some data is beeing downloaded (the indicator on status bar), but I don't have any idea what happens with that data after it's actually downloaded. I put a NSLog statement inside body of connection: didReceiveData: but it's not called during streaming. Any pointers how to fix that issue ?

Edit

Sorry my question was inaccurate. I know how to stream to a file but I need to stream to memory (NSData instance preferably). Okay it seems simple again due to NSOutputStream method initWithBytes:capacity: . And my problem is here, my stream has undefined length so there would be enormous impact on memory. I don't know what to do. My perfect solution works like this. Small chunks of data from the stream are processed having been downloaded and then they are discarded.

Answer 1

You could use the outputStreamToBuffer:capacity: method to create the stream.

As for the buffer, you can use a circular buffer, so that you can read from it as the stream writes to it. A great implementation (and explanation) is here .

Answer 2

Streaming a file download is a three line magic with MKNetworkKit.

//Create a MKNetworkOperation for the remote URL.

MKNetworkOperation *op = [self operationWithURLString:remoteURL 
                                                    params:nil
                                              httpMethod:@"GET"];

// add your output stream, in this case a file
[op addDownloadStream:[NSOutputStream outputStreamToFileAtPath:filePath
                                                             append:YES]];
// enqueue the operation to a MKNetworkEngine.
[self enqueueOperation:op];

That's it.