NSURLProtocol and post upload progress

Question

I am using a subclass of NSURLProtocol to intercept all HTTP calls and modify the user agent as well as add a other http headers required by my server.

-(id)initWithRequest:(NSURLRequest *)request
      cachedResponse:(NSCachedURLResponse *)cachedResponse
              client:(id <NSURLProtocolClient>)client
{
    NSMutableURLRequest* lInnerRequest;
    //************************************************

    lInnerRequest = [request mutableCopy];
    [lInnerRequest setValue:@"MyUserAgent" forHTTPHeaderField:@"User-Agent"];

    //************************************************
    self = [super initWithRequest:lInnerRequest
                   cachedResponse:cachedResponse
                           client:client];
    //************************************************
    if (self) 
    {
        self.innerRequest = lInnerRequest;  
    }
    //***********************************00*************
    [lInnerRequest release];
    //************************************************
    return self;
}

My protocol then uses an NSURLConnection

- (void)startLoading
{
self.URLConnection = [NSURLConnection connectionWithRequest:self.innerRequest delegate:self];
}

I then implement all the delegate method in the NSURLConnection by forwarding the call to the equivalent NSURLProtocolClient method. This works well in general but when I am uploading data to the server, my code which is using NSURLConnection does not get called back on:

connection:didSendBodyData:totalBytesWritten:totalBytesExpectedToWrite:

I understand why this is since I didn't implement that method in the NSURLProtocol as there are no equivalent NSURLProtocolClient method which can be used to report upload progress.

Has someone found any workaround for this?

Frugal

this is a very interesting problem. did you ever find out a way to do this? – Lira

Having the same problem with the exact same use case. Does anyone know any workarounds? – Milicent

Answer 1

add this line to your code to make it a HTTP POST request:

[lInnerRequest setHTTPMethod:@"POST"];

Bendigo

This does not work. in any case lInnerRequest = [request mutableCopy]; should have copied the method – Frugal

Answer 2

Use setProperty:forKey:inRequest: to save NSURLConnection and delegate object, then use propertyForKey:inRequest: to load NSURLConnection object and delegate object in custom NSURLProtocol class, when data sent, use the NSURLConnection object and delegate to call the delegate method

Manymanya