AFNetworking + queue + cancel operations + junk files - objective-c

Question

i 'm downloading some files using AFNetworking using a queue. Here is my code:
apiClient =[[AFHTTPClient alloc]initWithBaseURL: [NSURL URLWithString:ZFREMOTEHOST]];
for (NSString *element in self.productsArray) {
NSURL *url = [NSURL URLWithString:element];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
op = [[AFHTTPRequestOperation alloc] initWithRequest:request];
NSString *documentsDirectory = nil;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
documentsDirectory = [paths objectAtIndex:0];
NSString *targetFilename = [url lastPathComponent];
NSString *targetPath = [documentsDirectory stringByAppendingPathComponent:targetFilename];
op.outputStream = [NSOutputStream outputStreamToFileAtPath:targetPath append:NO];
[op setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
//failure case
NSLog(#"BaaZ File NOT Saved %#", targetPath);
//remove the file if saved a part of it!
NSFileManager *fileManager = [NSFileManager defaultManager];
[fileManager removeItemAtPath:targetPath error:&error];
if (error) {
NSLog(#"error dude");
}
if ([operation isCancelled]) {
//that doesn't work.
NSLog(#"Canceled");
}
}];
[op setDownloadProgressBlock:^(NSInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) {
if (totalBytesExpectedToRead > 0) {
dispatch_async(dispatch_get_main_queue(), ^{
self.progressView.alpha = 1;
self.progressView.progress = (float)totalBytesRead / (float)totalBytesExpectedToRead;
NSString *label = [NSString stringWithFormat:#"Downloaded %lld of %lld bytes", totalBytesRead,totalBytesExpectedToRead];
self.progressLabel.text = label;
});
}
}];
[self.resourcesArray addObject:op];
}
for (AFHTTPRequestOperation *zabols in self.resourcesArray) {
[apiClient.operationQueue addOperation:zabols];
}
the code is working fine on file downloading but i want some cancel functionality so i have a button with an action that has the code below:
[apiClient.operationQueue cancelAllOperations];
the operations cancel file but then there are some junk files on the Documents folder. By saying junk i mean file that started downloading i canceled them and the i get a file with the same name but useless can't be opened cause it's damaged.
How can i prevent AF from doing that and keep only the completed files when i cancel it?
any help would be grateful.
Also tried canceling job by job like that:
for (AFHTTPRequestOperation *ap in apiClient.operationQueue.operations) {
[ap cancel];
NSLog(#"%#",ap.responseFilePath);
NSFileManager *fileManager = [NSFileManager defaultManager];
[fileManager removeItemAtPath:ap.responseFilePath error:nil];
}
and deleting the junk files but that doesn't work either.

Answer 1

Try using AFDownloadRequestOperation extension, it additionally supports resume a partial download, uses a temporary directory and has a special block that helps with calculating the correct download progress.

Answer 2

You can also try that : github