Question

我有一个充满了通过我的应用访问的公共文件的存储桶。该应用会使用AFHTTPRequestOperation通过AFHTTPRequestOperationManager下载一批这些文件。对于几乎所有用户而言，这可以顺利运行而没有任何问对于极少数用户，所有下载都会因各种错误消息而失败。

大多数错误消息为Request failed: not found (404)，约5-10％为The operation couldn’t be completed. (NSURLErrorDomain error -999.)，The operation couldn’t be completed. No such file or directory和The network connection was lost。

遇到失败的用户在尝试再次下载文件时会遇到相同的失败，直到他们删除应用并重新安装。具有相同应用程序的其他用户可以毫无困难地下载文件。

以下是用于下载文件的代码：

-(void)beginDownloadsHTTP {
  NSString *baseURL = @"https://s3.amazonaws.com/";
  _afHTTPManager = [[AFHTTPRequestOperationManager alloc] initWithBaseURL:[NSURL URLWithString:baseURL]];

  for (int i = 0; i < 5; i++) {
    [self downloadOneFileHTTP:_fileKeys.anyObject];
  }
}

-(void)downloadOneFileHTTP:(NSString *)oneKey {
  [_fileKeys removeObject:oneKey];
  NSString *baseURL = @"https://s3.amazonaws.com/";
  NSString *plusKey = [oneKey stringByReplacingOccurrencesOfString:@" " withString:@"+"];
  NSString *downloadURL = [NSString stringWithFormat:@"%@%@/%@", baseURL, _bucketName, plusKey];

  NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:downloadURL]];
  NSString *downloadPath = [self downloadPathForItem:oneKey];      

  AFHTTPRequestOperation *op = [_afHTTPManager HTTPRequestOperationWithRequest:request success:^(AFHTTPRequestOperation *operation, id responseObject) {

    if (_fileKeys.count > 0) {
      [self downloadOneFileHTTP:_fileKeys.anyObject]; 
    }

  } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    [self fileDidFailWithKey:oneKey andError:error];

  }];
  op.securityPolicy.allowInvalidCertificates = YES;
  op.outputStream = [NSOutputStream outputStreamToFileAtPath:downloadPath append:NO];
  [_afHTTPManager.operationQueue addOperation:op];
}

有关导致问题的原因的任何想法？似乎手机中存储了一些设置导致特定文件集始终失败，删除应用程序会清除该设置，但我不知道在哪里查找。

某些用户的公共S3文件AFHTTPRequest失败

0 个答案: