CODEWITHSUNDEEP
iosobjective-ccocoahttpserver
Sinu Varghese
Sinu Varghese

Reputation: 800

Objective-C/CocoaHTTPServer - Is it possible to return response to the app?

I am developing an iPhone app which is using CocoaHTTPServer for making remote server communication.

The app will send the request details to the CocoaHTTPServer which will store the request locally. Once the internet connectivity is available, CocoaHTTPServer will send the request to remote server & will get the server response now CocoaHTTPServer has to send this response back to the app,

But I am confused how to implement it. Is there any inter app communication api for the same?

Any suggestions are greatly appreciated.

Upvotes: 2

Views: 940

Answers (3)

Sinu Varghese
Sinu Varghese

Reputation: 800

URL scheme can be used to send the response back to the app. The response from the remote server can be set as a parameter in the URL. The CocoaHTTPServer can invoke the other app which will be the handler of this unique URL. The below link provides more information on the same.

Inter-AppCommunication using URL scheme

Upvotes: 1

Vincent
Vincent

Reputation: 4409

You question is focussing on background proces.

When an App goes into background, it get very limited time to finish things up. After that the App freezes in background. That is not a good situation to start communication.

Apple states clearly that the priority is always on the running foreground tasks.

The Notification mechanism (as listed by RDC above) is created to handle external events. During such a wake up you can send/receive a little bit of data, however you'll get minimal priority. Since timing is important in communication, I would not go for that either.

I suggest checking communication during the wakeup call and start activities then. And use the Notification mechanism to wakeup the user, that network is up again.

Upvotes: 1

swiftBoy
swiftBoy

Reputation: 35783

Well , I haven't workaround CocoaHTTP server classes so can't explain you verywell but I found there are couple of tutorials will surly guide you.

Thanks to Matt Gallagher for such a detailed article.

You can listen for a connection using NSFileHandle class

listeningHandle = [[NSFileHandle alloc]
    initWithFileDescriptor:fileDescriptor
    closeOnDealloc:YES];

[[NSNotificationCenter defaultCenter]
    addObserver:self
    selector:@selector(receiveIncomingConnectionNotification:)
    name:NSFileHandleConnectionAcceptedNotification
    object:nil];
[listeningHandle acceptConnectionInBackgroundAndNotify];

When receiveIncomingConnectionNotification: is invoked, each new incoming connection will get its own NSFileHandle. If you're keeping track, you can handle received message

if(CFHTTPMessageIsHeaderComplete(incomingRequest))
{
    HTTPResponseHandler *handler =
        [HTTPResponseHandler
            handlerForRequest:incomingRequest
            fileHandle:incomingFileHandle
            server:self];

    [responseHandlers addObject:handler];
    [self stopReceivingForFileHandle:incomingFileHandle close:NO];

    [handler startResponse];
    return;
}

Note : please go through the full article, it has nice explanation.

Apart from this you may have look on this as well.

Hope this will give you some idea.

Upvotes: 1

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