AFNetworking 2.0 cancel specific task - ios

Question

I am trying out afnetworking 2.0 and just trying to figure out how to cancel specific tasks.
The old way would be to use something like
[self cancelAllHTTPOperationsWithMethod:#"POST" path:#"user/receipts"]
but I dont see anything like this in 2.0
I created a sub class of AFHTTPSessionManager which gives me access to the array of pending tasks and I can cancel them directly but I dont know how to identify 1 task from another so I can cancel only specific tasks.
Task does have an taskidentifier but this doesnt appear to be what I need.
NSString *path = [NSString stringWithFormat:#"user/receipts"];
[self.requestSerializer setAuthorizationHeaderFieldWithUsername:[prefs valueForKey:#"uuid"] password:self.store.authToken];
[self GET:path parameters:nil success:^(NSURLSessionDataTask *task, id responseObject) {
completionBlock(responseObject);
} failure:^(NSURLSessionDataTask *task, NSError *error) {
errorBlock(error);
}];
now if i wanted to cancel this request only how would I approach this?

Answer 1

You can store the task in a variable so you can access it later:
NSURLSessionDataTask* task = [self GET:path parameters:nil success:^(NSURLSessionDataTask *task, id responseObject) {
completionBlock(responseObject);
} failure:^(NSURLSessionDataTask *task, NSError *error) {
errorBlock(error);
}];
Then simply cancel it with [task cancel].
Another way would be to save the task ID of the task and later ask the URL session for its tasks and identify the task you wish to cancel:
// save task ID
_savedTaskID = task.taskIdentifier;
// cancel specific task
for (NSURLSessionDataTask* task in [self dataTasks]) {
if (task.taskIdentifier == _savedTaskID) {
[task cancel];
}
}

Answer 2

No need to save it, here is my implementation, use your subclass of AFURLSessionManager for cancelling specific request:
- (void)cancelAllHTTPOperationsWithPath:(NSString *)path
{
AFURLSessionManager * yourSessionManager = [self getSessionManager];
[[yourSessionManager session] getTasksWithCompletionHandler:^(NSArray *dataTasks, NSArray *uploadTasks, NSArray *downloadTasks) {
[self cancelTasksInArray:dataTasks withPath:path];
[self cancelTasksInArray:uploadTasks withPath:path];
[self cancelTasksInArray:downloadTasks withPath:path];
}];
}
- (void)cancelTasksInArray:(NSArray *)tasksArray withPath:(NSString *)path
{
for (NSURLSessionTask *task in tasksArray) {
NSRange range = [[[[task currentRequest]URL] absoluteString] rangeOfString:path];
if (range.location != NSNotFound) {
[task cancel];
}
}
}

Answer 3

you can do the following
NSArray *operations = [[[MyClient sharedClient] operationQueue] operations];
if(operations && operations.count > 0){
for (NSOperation *operation in operations) {
if([operation isKindOfClass:[AFHTTPRequestOperation class]]){
AFHTTPRequestOperation *httpOperation = (AFHTTPRequestOperation *)operation;
NSLog(#"%#", [[httpOperation request] URL]);
//--- if this is your request then cancel it --> [httpOperation cancel];
}
}
}
Where MyClient is a child of AFHTTPClient and the function sharedClient is a static function which returns a singleton instance of MyClient