AWSS3TransferManager NSCocoaErrorDomain 代码=2 错误

Posted 2023-03-07

【中文标题】AWSS3TransferManager NSCocoaErrorDomain 代码=2 错误

【英文标题】：AWSS3TransferManager NSCocoaErrorDomain Code=2 Error

【发布时间】：2015-01-20 08:58:10

【问题描述】：

我的代码出现以下奇怪错误。 NSFilemanager 中的文件路径有限制吗？真正奇怪的是，通过 AWS S3 上传时，这条路径可以正常工作

AWSURLSessionManager URLSession:dataTask:didReceiveResponse:completionHandler:] |错误：无法使用文件路径创建文件：/profilePicture12.jpeg

    AWSStaticCredentialsProvider *credentialsProvider = [AWSStaticCredentialsProvider credentialsWithAccessKey:AWS_Access_Key secretKey:AWS_Secret_Key];
AWSServiceConfiguration *configuration = [AWSServiceConfiguration configurationWithRegion:AWSRegionUSWest1 credentialsProvider:credentialsProvider];
[AWSServiceManager defaultServiceManager].defaultServiceConfiguration = configuration;
self.downloadRequest = [AWSS3TransferManagerDownloadRequest new];

//bucket and image name
self.downloadRequest.bucket = AWS_Bucket_Name;
self.downloadRequest.key = S3_Link;


//unique customer path to store download
NSString* uniqueCustomerPath = [NSString stringWithFormat:@"profilePicture%ld.jpeg", (long)self.current_customer.id];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString  *documentsDirectory = [paths objectAtIndex:0];
NSString *dataPath = [documentsDirectory stringByAppendingPathComponent:uniqueCustomerPath];
self.downloadRequest.downloadingFileURL = [NSURL fileURLWithPath:uniqueCustomerPath];

AWSS3TransferManager *transferManager = [AWSS3TransferManager defaultS3TransferManager];
[[transferManager download:self.downloadRequest] continueWithExecutor:[BFExecutor mainThreadExecutor] withBlock:^id(BFTask *task)
    if (task.error != nil) 
        NSLog(@"Error: [%@]", task.error);

    else 
      ///do stuff
    
    return nil;
];

【参考方案1】：

以下代码对我有用。我怀疑您正在尝试将文件写入不可写路径。另一个猜测是 S3_Link 设置为键。如果它是完整的 S3 路径，它可能不起作用。试试那里的文件名。

NSURL *bucketFileURL = [NSURL URLWithString:url];
NSString *key = [bucketFileURL lastPathComponent];
NSString *downloadingFilePath = [DOCUMENTS_DIRECTORY stringByAppendingPathComponent:key];

NSURL *downloadingFileURL = [NSURL fileURLWithPath:downloadingFilePath];

AWSS3TransferManagerDownloadRequest *downloadRequest = [AWSS3TransferManagerDownloadRequest new];
downloadRequest.bucket = @"my-bucket-name";
downloadRequest.key = key;
downloadRequest.downloadingFileURL = downloadingFileURL;

AWSS3TransferManager *transferManager = [AWSS3TransferManager defaultS3TransferManager];
[[transferManager download:downloadRequest] continueWithBlock:^id(BFTask *task) 

     if (task.result) 
         UIImage *img = [UIImage imageWithData:[NSData dataWithContentsOfURL:downloadRequest.downloadingFileURL]];
         callback(img);
      else if (task.error) 
         NSLog(@"Download Error: %@", task.error);
     

     return nil;
 ];