【发布时间】：2022-01-27 17:42:36
【问题描述】：
嗨，我正在尝试使用 Amazon 网络服务来存储我的 iOS 应用程序的文件。
这是我用来下载存储在 aws S3 上的文件的代码
我在 appDelegate 中添加了以下内容
AWSCognitoCredentialsProvider *credentialsProvider = [[AWSCognitoCredentialsProvider alloc]
initWithRegionType:AWSRegionUSEast2
identityPoolId:@"us-east-2:3764e0f9-khu97-4844-b9f7-57defdfjv8b8b"];
AWSServiceConfiguration *configuration = [[AWSServiceConfiguration alloc] initWithRegion:AWSRegionUSEast2 credentialsProvider:credentialsProvider];
[AWSServiceManager defaultServiceManager].defaultServiceConfiguration = configuration;
然后在我的课堂上，我使用以下内容下载对象。请注意，该对象未应用任何加密，并且该存储桶的所有权限均已解锁
- (void)downloadImageToAWS{
// AWS Configurations
AWSS3DownloadHelper *aws = [[AWSS3DownloadHelper alloc] init];
aws.bucket = @"my-sample-bucket-002";
aws.key = @"photo-sam-002.jpg";
// AWS progress block
aws.progressBlock = ^(AWSS3TransferUtilityTask *task, NSProgress *progress) {
dispatch_async(dispatch_get_main_queue(), ^{
NSLog(@"progress.fractionCompleted %f", progress.fractionCompleted);
});
};
// AWS completionHandler
[self addAWSDownloadComplitionHandler:aws];
// Update UI if job / task can upload a file on AWS S3
[self successfulDownloadOfAWSS3ByCompletionHandler:aws.completionHandler withProgressBlock:aws.progressBlock];
[aws downloadAWSFile];
}
- (void) addAWSDownloadComplitionHandler:(AWSS3DownloadHelper *)aws {
// Create instance to View Controller
NSLog(@"addAWSDownloadComplitionHandler");
aws.completionHandler = ^(AWSS3TransferUtilityDownloadTask *task, NSURL *location, NSData *data, NSError *error) {
dispatch_async(dispatch_get_main_queue(), ^{
if (error) {
NSLog(@"Unsuccessfully downloaded error %li", (long)[error code]);
NSLog(@"Unsuccessfully downloaded error %@", [error description]);
}
else if (data) {
NSLog(@"data %@", data);
}
});
};
}
- (void) successfulDownloadOfAWSS3ByCompletionHandler:(AWSS3TransferUtilityDownloadCompletionHandlerBlock)completionHandler withProgressBlock:(AWSS3TransferUtilityProgressBlock)progressBlock {
NSLog(@"successfulDownloadOfAWSS3ByCompletionHandler");
AWSS3TransferUtility *transferUtility = [AWSS3TransferUtility defaultS3TransferUtility];
[transferUtility enumerateToAssignBlocksForUploadTask:nil downloadTask:^(AWSS3TransferUtilityDownloadTask * _Nonnull downloadTask, AWSS3TransferUtilityProgressBlock _Nullable __autoreleasing * _Nullable downloadProgressBlockReference, AWSS3TransferUtilityDownloadCompletionHandlerBlock _Nullable __autoreleasing * _Nullable completionHandlerReference) {
NSLog(@"taskIdentifier %lu", (unsigned long)downloadTask.taskIdentifier);
*downloadProgressBlockReference = progressBlock;
*completionHandlerReference = completionHandler;
dispatch_async(dispatch_get_main_queue(), ^{
});
}];
}
虽然我已经把所有权限都允许了。阻止所有公共访问已关闭，我不断收到以下错误：
Domain=com.amazonaws.AWSS3TransferUtilityErrorDomain Code=2 "(null)" UserInfo={Server=AmazonS3, Error={
Code = AccessDenied;
HostId = "SJABFLSKBtprmLRaHLjjockzjfubejlakhipjaKDNSAFJLB4ViE=";//Changed
Message = "Access Denied";
RequestId = jabduw2dhC6WCT;//changed
}, Transfer-Encoding=Identity, Content-Type=application/xml, Date=Wed, 29 Dec 2021 09:33:06 GMT, x-amz-request-id=2TJSHCJ2ASTC6WCT, x-amz-id-2=Fbg2cDXwU5wLgQLHbGtprmLRaHLjjocvZzCcUNfMrSpT5Oiwl3LjEkpPQ2OBzLmBrKXnrwq4ViE=}
我已采纳此视频中的所有建议： Why am I getting an Access Denied error from the Amazon S3 console while I modify a bucket policy? - YouTube
在 cloud shell 上尝试以下命令没有显示任何错误：
aws s3 cp s3://<bucket name>/<key> /tmp/localfile
如果需要任何进一步的代码或信息，请告诉我。
【问题讨论】：
-
您表示您在修改存储桶策略时应用了与拒绝访问相关的 YouTube 视频建议，但这似乎与您的问题完全无关。除非您真的知道自己在这里做什么，否则您不应该进行任何这些更改。
-
@jarmod 感谢您的评论，确实 aws 环境是全新的，我不确定我是否走在正确的轨道上，因此非常欢迎任何建议。
标签： ios objective-c amazon-web-services amazon-s3