Amazon AWSS3TransferManager 在 ios 中无法上传多部分数据

Question

我正在尝试将 NSData 对象（可以是图像或视频）上传到 Amazon S3。

当文件大小低于 5Mb 时一切正常。当它变大时，AWS SDK 会切换到分段上传，然后失败：

匿名用户无法启动分段上传。请进行身份验证。

我正在使用当前可用的最新 AWSS3 SDK 版本 (2.5.5)。

- (void) uploadDataToAWS: (NSData *) mediaData
             contentType: (NSString *) contentType
                  bucket: (NSString *) bucket
                  region: (NSString *) region
               objectKey: (NSString *) objectKey
             accessKeyId: (NSString *) accessKeyId
         secretAccessKey: (NSString *) secretAccessKey
            sessionToken: (NSString *) sessionToken
         progressHandler: (void (^) (int64_t bytesSent, int64_t totalBytesSent, int64_t totalBytesExpectedToSend)) progressHandler
   withCompletionHandler: (void (^) (BOOL success)) completionHandler {

    OwnAWSCredentialsProvider *credentialsProvider = [OwnAWSCredentialsProvider credentialsWithAccessKey:accessKeyId secretKey:secretAccessKey sessionKey:sessionToken];
    AWSServiceConfiguration *awsServiceConfiguration = [[AWSServiceConfiguration alloc] initWithRegion:AWSRegionUSEast1
                                                                                   credentialsProvider:credentialsProvider];
    [AWSServiceManager defaultServiceManager].defaultServiceConfiguration = awsServiceConfiguration;

    //Since S3 does not support objects uploads (only files), will write first locally:
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *filePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.forUpload", [self randomStringWithLength:10]]];
    [mediaData writeToFile:filePath atomically:YES];

    //Configure upload request
    AWSS3TransferManagerUploadRequest *uploadRequest = [AWSS3TransferManagerUploadRequest new];
    uploadRequest.bucket = bucket;
    uploadRequest.key = objectKey;
    uploadRequest.body =  [NSURL fileURLWithPath:filePath];
    uploadRequest.contentType = contentType;

    uploadRequest.uploadProgress =  ^(int64_t bytesSent, int64_t totalBytesSent, int64_t totalBytesExpectedToSend){
        progressHandler (bytesSent, totalBytesSent, totalBytesExpectedToSend);
    };

    AWSS3TransferManager *transferManager = [AWSS3TransferManager defaultS3TransferManager];

    [[transferManager upload:uploadRequest] continueWithExecutor:[AWSExecutor mainThreadExecutor] withBlock:^id(AWSTask *task) {
        //Remove the generated file
        [[NSFileManager defaultManager] removeItemAtPath:filePath error:nil];

        if (task.error != nil) {
            if( task.error.code != AWSS3TransferManagerErrorCancelled
               && task.error.code != AWSS3TransferManagerErrorPaused) {
                NSLog(@"(%i) %@", (int)task.error.code, [task.error localizedDescription]);
                NSLog(@"Message: %@", task.error.userInfo[@"Message"]);
            }
            completionHandler (NO);
        } else {
            completionHandler(YES);
        }
        return task;
    }];
}

OwnAWSCredentialsProvider.m：

#import "OwnAWSCredentialsProvider.h"

@implementation OwnAWSCredentialsProvider

+ (instancetype)credentialsWithAccessKey:(NSString *)accessKey
                               secretKey:(NSString *)secretKey
                              sessionKey:(NSString*)sessionKey
{
    OwnAWSCredentialsProvider *credentials = [[OwnAWSCredentialsProvider alloc] initWithAccessKey:accessKey secretKey:secretKey sessionKey:sessionKey];
    return credentials;
}

- (instancetype)initWithAccessKey:(NSString *)accessKey
                        secretKey:(NSString *)secretKey
                       sessionKey:(NSString*)sessionKey
{
    if (self = [super init]) {
        _accessKey = accessKey;
        _secretKey = secretKey;
        _sessionKey = sessionKey;
    }
    return self;
}

- (AWSTask<AWSCredentials *> *)credentials {
    return [[AWSTask taskWithResult:nil] continueWithBlock:^id _Nullable(AWSTask * _Nonnull task) {
        return task;
    }];
}

- (void)invalidateCachedTemporaryCredentials {  
}

@end

每次上传都会生成凭据，它们有效且适用于小于 5Mb 的文件。

我不使用预签名的 URL，所以我需要让这段代码以某种方式工作。

感谢任何帮助。

Answer 1

对于遇到相同问题的任何人，我终于找到了问题所在：

我使用 OwnAWSCredentialsProvider 作为 AWSCredentialsProvider 的包装器。

这里，凭证的 getter 总是返回 nil（不知道为什么它适用于小文件）。

相反，我现在使用的是 AWS 开发工具包提供的 AWSBasicSessionCredentialsProvider，一切正常。

AWSBasicSessionCredentialsProvider *credentialsProvider = [[AWSBasicSessionCredentialsProvider alloc] initWithAccessKey:accessKeyId secretKey:secretAccessKey sessionToken:sessionToken];