我使用C#和AWSSDK v3将文件上传到S3存储桶。该文件使用ServerSideEncryptionCustomerMethod加密。我可以上传文件,但如果我使用S3FileInfo()检查文件是否存在。存在,则会引发错误(400)错误请求。但是,如果我在上传例程中注释掉指定加密的行,则S3FileInfo()。Exists会在不抛出错误的情况下找到该文件。我做错了什么?或者有一种不同的方法来检查文件加密时是否存在?
这是我的上传例程:
public static string wfUpload(Stream pFileStream, string pBucketName, string pKeyName, string pCryptoKey) {
string retVal = "";
try {
using (var lS3Client = new AmazonS3Client()) {
Aes aesEncryption = Aes.Create();
aesEncryption.KeySize = 256;
aesEncryption.GenerateKey();
string lCryptoKey = Convert.ToBase64String(aesEncryption.Key);
PutObjectRequest request = new PutObjectRequest {
BucketName = pBucketName,
Key = pKeyName,
ServerSideEncryptionCustomerMethod = ServerSideEncryptionCustomerMethod.AES256,
ServerSideEncryptionCustomerProvidedKey = lCryptoKey,
};
request.InputStream = pFileStream;
PutObjectResponse response = lS3Client.PutObject(request);
retVal = lCryptoKey;
}
}
catch (AmazonS3Exception s3Exception) {
Console.WriteLine(s3Exception.Message,
s3Exception.InnerException);
throw (s3Exception);
}
catch (Exception e) {
throw (e);
}
return retVal;
}
我的例程检查文件是否存在:
public static bool wfFileExists(String pBucketName, String pKeyName) {
bool retVal = false;
try {
using (var lS3Client = new AmazonS3Client()) {
if (new Amazon.S3.IO.S3FileInfo(lS3Client, pBucketName, pKeyName).Exists) {
retVal = true;
}
}
}
catch (AmazonS3Exception s3Exception) {
Console.WriteLine(s3Exception.Message,
s3Exception.InnerException);
throw (s3Exception);
}
catch (Exception e) {
throw (e);
}
return retVal;
}
答案 0 :(得分:0)
好吧,我认为我使用的类/方法是不支持加密的高级API之一。我更改了代码以执行元数据查询,以查看是否有任何内容返回。如果它找不到该文件,它会抛出一个" NotFound"我检查的s3Exception中的ErrorCode。希望这有助于其他人。如果其他人建议采用更好的方法,我也很乐意学习它。
public static bool wfFileExists(String pBucketName, String pKeyName, String pCryptoKey) {
bool retVal = false;
try {
using (var lS3Client = new AmazonS3Client()) {
GetObjectMetadataRequest request = new GetObjectMetadataRequest {
BucketName = pBucketName,
Key = pKeyName,
ServerSideEncryptionCustomerMethod = ServerSideEncryptionCustomerMethod.AES256,
ServerSideEncryptionCustomerProvidedKey = pCryptoKey,
};
GetObjectMetadataResponse lMetaData = lS3Client.GetObjectMetadata(request);
// If an error is not thrown, we found the metadata.
retVal = true;
}
}
catch (AmazonS3Exception s3Exception) {
Console.WriteLine(s3Exception.Message,
s3Exception.InnerException);
if (s3Exception.ErrorCode != "NotFound") {
throw (s3Exception);
}
}
catch (Exception e) {
throw (e);
}
return retVal;
}