I’m trying to use URL Loading System to upload some files to remote server via HTTP protocol. I would like to receive periodic notifications during upload about the amount of already uploaded bytes. In other words, I would like to see a progress of uploading process.
http://developer.apple.com/documentation/Cocoa/Reference/Foundation/ObjC_classic/Classes/NSURLConnection.html
NSURLConnection�s delegate methods allow an object to receive informational callbacks about the asynchronous load of a URL request. Other delegate methods provide facilities that allow the delegate to customize the process of performing an asynchronous URL load.�
The delegate receives this message as connection loads data incrementally. The delegate should concatenate the contents of each data object delivered to build up the complete data for a URL load.
Thanks for link, but I read it already. These callbacks work during loading data FROM server. I need callbacks when I’m sending TO server. I made a couple of tests: sent 1MB to server and received response from server. And didReceiveData was called only once. Then connectionDidFinishLoading.
Correct me if I’m wrong.
I’m writing a client/server application, where the client is a Cocoa app. It occasionally sends files to the server via HTTP POST. The server then sends some sort of acknowledgement as its response. How should I display “upload percentage complete” information to the client? One way might be to “chunk” my upload, but that seems like it would take a lot of extra overhead. Another way: send separate occasional messages from the client to the server which ask the server to report the status.
Your best bet would probably be to use something other than NSURLConnection. I believe that the [[CUrl]] wrappers will report upload status.
more discussion of uploading in HTTPFileUpload