如何使用网络上传后台上传任务 [英] How to upload task in background using afnetworking

问题描述

我尝试使用AFNetworking上传大文件，并在应用程序在后台时继续上传。

我可以上传文件，但是当
例外：EXC_BAD_ACCESS（code = 1，address = 0x8000001f））

<$ p $ $ b $ _ $ _ $ _ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ b _dispatch_root_queue_drain
_dispatch_worker_thread3
_pthread_wqthread

以下是一些示例代码：注意：当我使用 [NSURLSessionConfiguration defaultSessionConfiguration] 时，上传成功，但当应用程序在后台时不会继续。 [NSURLSessionConfiguration backgroundSessionConfigurationWithIdentifier：@com.company.appname.uploadservice] 导致应用程序崩溃。

<$ p $我们可以通过下面的例子来说明如何使用这个方法来实现这个功能：$ {code> NSMutableURLRequest * request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod：@POSTURLString：[uploadBundle.uploadUrl absoluteString] parameters：[uploadBundle getParameters] constructBodyWithBlock：^（id< AFMultipartFormData> formData） $ b [formData appendPartWithFileURL：uploadBundle.fileDataUrl name：uploadBundle.fileName fileName：uploadBundle.fileName mimeType：uploadBundle.mimeType error：nil];
}错误：无];

认证*认证= [认证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 ：％@，错误）;
} else {
NSLog（@％@％@，response，responseObject）;
}
}];

解决方案

我正在回答我自己的问题，希望它将帮助一些人。
$ b $我找不到任何地方记录，但它看起来像你必须使用 uploadTaskWithRequest：fromFile：progress： completionHandler：当使用后台会话配置时。

这是一个简单的例子：

  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：@filefilename：nil contentType：nil]; 
 [multipartFormData addParameters：[uploadBundle getParameters]]; 
 
 NSURLRequest * rq = [OMGHTTPURLRQ POST：[uploadBundle.uploadUrl absoluteString]：multipartFormData]; 
 $ b $ id path = [[NSSearchPathForDirectoriesInDomains（NSCachesDirectory，NSUserDomainMask，YES）lastObject] stringByAppendingPathComponent：@upload.NSData]; 
 [rq.HTTPBody writeToFile：path atomically：YES]; 
 
 [[session uploadTaskWithRequest：rq fromFile：[NSURL fileURLWithPath：path]] resume]; 
  

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);
    }
}];

解决方案

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];

这篇关于如何使用网络上传后台上传任务的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！