I'm trying to upload large files using AFNetworking and have the upload continue when the application is in the background.
I can upload files just fine, but when I attempt to use a background configuration -- the application crashes with the following stacktrace: Exception: EXC_BAD_ACCESS (code=1, address=0x8000001f))
_CFStreamSetDispatchQueue
-[__NSCFBackgroundDataTask captureStream:]
__70-[__NSCFBackgroundDataTask _onqueue_needNewBodyStream:withCompletion:]_block_invoke_2
_dispatch_call_block_and_release
_dispatch_queue_drain
_dispatch_queue_invoke
_dispatch_root_queue_drain
_dispatch_worker_thread3
_pthread_wqthread
Here is some example code:
Note: When I use [NSURLSessionConfiguration defaultSessionConfiguration]
the upload succeeds but will not continue when the application is in the background. [NSURLSessionConfiguration backgroundSessionConfigurationWithIdentifier:@"com.company.appname.uploadservice"]
causes the application to crash.
NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:[uploadBundle.uploadUrl absoluteString] parameters:[uploadBundle getParameters] constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
[formData appendPartWithFileURL:uploadBundle.fileDataUrl name:uploadBundle.fileName fileName:uploadBundle.fileName mimeType:uploadBundle.mimeType error:nil];
} error:nil];
Authentication *authentication = [Authentication getInstance];
[request addValue:authentication.token forHTTPHeaderField:@"token"];
[request addValue:authentication.authorization forHTTPHeaderField:@"Authorization"];
//NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration backgroundSessionConfigurationWithIdentifier:@"com.company.appname.uploadservice"];
AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];
NSProgress *progress = nil;
_currentUploadTask = [manager uploadTaskWithStreamedRequest:request progress:&progress completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
if (error) {
NSLog(@"Error: %@", error);
} else {
NSLog(@"%@ %@", response, responseObject);
}
}];
I'm answering my own question in hopes that it will help a few people.
I can't find this documented anywhere, but it looks like you have to use uploadTaskWithRequest:fromFile:progress:completionHandler:
when using a background session configuration.
Here is a simple example:
AppDelegate *appDelegate = (AppDelegate *) [[UIApplication sharedApplication] delegate];
id config = [NSURLSessionConfiguration backgroundSessionConfigurationWithIdentifier:@"com.opentext.core.uploadservice"];
id session = [NSURLSession sessionWithConfiguration:config delegate:appDelegate delegateQueue:[NSOperationQueue new]];
OMGMultipartFormData *multipartFormData = [OMGMultipartFormData new];
//[multipartFormData addFile:data parameterName:@"file" filename:nil contentType:nil];
[multipartFormData addParameters:[uploadBundle getParameters]];
NSURLRequest *rq = [OMGHTTPURLRQ POST:[uploadBundle.uploadUrl absoluteString] :multipartFormData];
id path = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"upload.NSData"];
[rq.HTTPBody writeToFile:path atomically:YES];
[[session uploadTaskWithRequest:rq fromFile:[NSURL fileURLWithPath:path]] resume];
The issues seems to be that you are trying to use a "streamed request" instead of file. The code works with
NSURLSessionUploadTask *uploadTask = [manager uploadTaskWithRequest:request fromFile:[NSURL fileURLWithPath:filePath] progress:&progress completionHandler:^(NSURLResponse *response, id responseObject, NSError *error){
.... }];
method without any issues. I also found that if you try to use the file data instead of the actual file (with uploadTaskWithRequest: fromData: progress: completionHandler:), the upload fails as explained in Upload tasks from NSData are not supported in background sessions
来源:https://stackoverflow.com/questions/27154006/how-to-upload-task-in-background-using-afnetworking