public override async Task <IBlobMetadata> FetchMetadataAsync(string virtualPath, NameValueCollection queryString)
{
var path = ParseAndFilterPath(virtualPath);
//Looks like we have to execute a head request
var request = new GetObjectMetadataRequest()
{
BucketName = path.Bucket, Key = path.Key
};
try
{
GetObjectMetadataResponse response = await S3Client.GetObjectMetadataAsync(request);
return(new BlobMetadata()
{
Exists = true, LastModifiedDateUtc = response.LastModified
});
}
catch (AmazonS3Exception s3e)
{
if (s3e.StatusCode == System.Net.HttpStatusCode.NotFound || s3e.StatusCode == System.Net.HttpStatusCode.Forbidden)
{
return(new BlobMetadata()
{
Exists = false
});
}
else
{
throw;
}
}
}
/// <summary>
/// This method is called for every Lambda invocation. This method takes in an S3 event object and can be used
/// to respond to S3 notifications.
/// </summary>
/// <param name="evnt"></param>
/// <param name="context"></param>
/// <returns></returns>
public async Task <string> FunctionHandler(S3Event evnt, ILambdaContext context)
{
var s3Event = evnt.Records?[0].S3;
if (s3Event == null)
{
return(null);
}
try
{
var response = await S3Client.GetObjectMetadataAsync(s3Event.Bucket.Name, s3Event.Object.Key);
string message = $"{s3Event.Object.Key} - {s3Event.Object.Size} Bytes";
context.Logger.LogLine(message);
PublishRequest request = new PublishRequest
{
Message = message,
PhoneNumber = "+34642375554"
};
var smsResponse = await SnsClient.PublishAsync(request);
context.Logger.LogLine($"Response from SNS: {smsResponse.HttpStatusCode}");
return(response.Headers.ContentType);
}
catch (Exception e)
{
context.Logger.LogLine($"Error getting object {s3Event.Object.Key} from bucket {s3Event.Bucket.Name}. Make sure they exist and your bucket is in the same region as this function.");
context.Logger.LogLine(e.Message);
context.Logger.LogLine(e.StackTrace);
throw;
}
}
public async Task <string> GetLatestVersionId(string bucketName, string objectKey)
{
GetObjectMetadataRequest request = new GetObjectMetadataRequest
{
BucketName = bucketName,
Key = objectKey
};
var response = await S3Client.GetObjectMetadataAsync(request);
return(response.VersionId);
}
public async Task <bool> ImageExists(string bucketName, string objectKey)
{
try
{
GetObjectMetadataRequest request = new GetObjectMetadataRequest
{
BucketName = bucketName,
Key = objectKey
};
await S3Client.GetObjectMetadataAsync(request);
return true;
}
catch (AmazonS3Exception)
{
return(false);
}
}
private async Task <bool> DoesFileExist(string url, CancellationToken cancellationToken)
{
try
{
var response = await S3Client.GetObjectMetadataAsync("chdg-url-images", url, cancellationToken);
return(true);
}
catch (AmazonS3Exception ex)
{
if (ex.StatusCode == System.Net.HttpStatusCode.NotFound)
{
return(false);
}
//status wasn't not found, so throw the exception
throw;
}
}