AFNetworking +大型下载文件+简历下载 [英] AFNetworking + big download files + resume downloads

问题描述

我需要使用AFNetworking下载文件> 500 Mo。
有时候下载的时间是10分钟，如果应用程序是在后台，下载是无法完成的。

所以我想尝试部分下载。我发现很多链接，这似乎可以通过在AFHTTPRequestOperation上的pause（）和resume（）方法。

其实我做了：

  [self.downloadOperation setShouldExecuteAsBackgroundTaskWithExpirationHandler：^ {
 //清理任何需要处理的事情，如果请求超时
 [ self.download操作pauseDownload]; 
}]; 
  

DownloadOperation是AFHTTPRequestOperation（singleton）的子类。

在AppDelegate中：

   - （void）applicationWillEnterForeground：（UIApplication *）应用程序
 {
 //如果暂停，恢复只会恢复... 
 [[DownloadHTTPRequestOperation sharedOperation] resumeDownload]; 
} 
  

服务器可以在头文件中获取新的范围...

我的问题：

1）是不是最好的方法？
2）简历是否需要更改outputStream（附加：NO => append：YES）？还是由AFNetworking管理？ （不找到）

  self.outputStream = [NSOutputStream outputStreamToFileAtPath：self.filePath append：YES]; 
  

这样的东西（在DownloadHTTPRequestOperation中）：

   - （void）pauseDownload 
 {
 NSLog（@pause download）; 
 [self pause]; 
} 
 
  - （void）resumeDownload 
 {
 NSLog（@resume download）; 
 self.outputStream = [NSOutputStream outputStreamToFileAtPath：self.filePath append：YES]; 
 [self resume]; 
} 
  

感谢您的帮助。

解决方案

更新：

由于steipete可能不会再维护AFDownloadRequestOperation（ https://github.com/steipete/AFDownloadRequestOperation/pull/68 ）。 NSURLSessionDownloadTask可能是一个更好的选择。

---

https://github.com/steipete/AFDownloadRequestOperation

另外，我在AFDownloadRequestOperation上编写一个库： https://github.com/BB9z/RFDownloadManager

I need to download files > 500 Mo with AFNetworking. Sometimes, the time to download them is > 10 minutes and if the app is in background, the download can't be complete.

So I want to try partial downloads. I found a lot of links and this seems to be possible with pause() and resume() methods on AFHTTPRequestOperation.

Actually, I did:

  [self.downloadOperation setShouldExecuteAsBackgroundTaskWithExpirationHandler:^{   
    // Clean up anything that needs to be handled if the request times out
    [self.downloadOperation pauseDownload];
  }];

DownloadOperation is a subclass of AFHTTPRequestOperation (singleton).

And in AppDelegate:

- (void)applicationWillEnterForeground:(UIApplication *)application
{
  // resume will only resume if it's paused...
  [[DownloadHTTPRequestOperation sharedOperation] resumeDownload];  
}

The server is OK to get the new range in headers...

My questions:

1) Is-t the good way to do it ? 2) Does the resume needs to change the outputStream (append:NO => append:YES) ? Or is-it managed somewhere by AFNetworking ? (don't find)

self.outputStream = [NSOutputStream outputStreamToFileAtPath:self.filePath append:YES];

Something like this (in DownloadHTTPRequestOperation):

- (void)pauseDownload
{
  NSLog(@"pause download");
  [self pause];
}

- (void)resumeDownload
{
  NSLog(@"resume download");
  self.outputStream = [NSOutputStream outputStreamToFileAtPath:self.filePath append:YES];
  [self resume];
}

Thanks for your help.

解决方案

Update:

As steipete may wont maintain AFDownloadRequestOperation any more (https://github.com/steipete/AFDownloadRequestOperation/pull/68). NSURLSessionDownloadTask may be a better choice.

---

https://github.com/steipete/AFDownloadRequestOperation

Also, I write a lib base on AFDownloadRequestOperation: https://github.com/BB9z/RFDownloadManager

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