如何使用iOS将文件上传到AmazonS3并获得响应的url

Question

AWSS3TransferManager *transferManager = [AWSS3TransferManager defaultS3TransferManager];
    AWSS3TransferManagerUploadRequest *uploadRequest = [AWSS3TransferManagerUploadRequest new];
    uploadRequest.bucket = S3BucketName;
    uploadRequest.key = S3UploadKeyName;
    uploadRequest.body = self.uploadFileURL;
    //uploadRequest.contentLength = [NSNumber numberWithUnsignedLongLong:fileSize];

    [[transferManager upload:uploadRequest] continueWithBlock:^id(BFTask *task) {
        // Do something with the response
        AWSS3TransferManagerUploadOutput *uploadOutPut = task.result;
        NSLog(@"bftask:%@",uploadOutPut); // Upload out put gives me the following response
        return nil;
    }];

bfTask响应：

bftask:<AWSS3TransferManagerUploadOutput: 0x1706606c0> {
    ETag = "\"0aefedfa36b687a74025b1ad50f3101f\"";
    serverSideEncryption = 0;
}

Answer 1

如果只需要下载文件，可以使用AWSS3TransferManagerDownloadRequest下载使用SDK的文件。或者，您可以使用awss3presignedurlbuilder生成预签名的URL来下载文件。

如果只想知道对象的URL，URL遵循以下模式：

https://<YourS3Endpoint>/<YourBucketName>/<YourObjectKeyName>

默认情况下，AmazonS3中的任何对象都是私有的，不可公开读取。如果要使其可公开阅读，则需要在AWSS3TransferManagerUploadRequest对象上设置ACL。