Copy Data From Azure Blob Storage to AWS S3
Managed to get something working on this - it might be useful for someone else.
I decided to write an azure function that uses a HTTP request as a trigger.
These two posts helped me a lot;
How can I use NuGet packages in my Azure Functions?
Copy from Azure Blob to AWS S3 using C#
Please note my answer to the Nuget packages if you are using Azure functions 2.x.
Here is the code - you can modify the basis of this to your needs. I return a JSON Serialized object because Azure Data Factory requires this as a response from a http request sent from a pipeline;
#r "Microsoft.WindowsAzure.Storage"
#r "Newtonsoft.Json"
#r "System.Net.Http"
using System.Net;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Primitives;
using Newtonsoft.Json;
using Microsoft.WindowsAzure.Storage.Blob;
using System.Net.Http;
using Amazon.S3;
using Amazon.S3.Model;
using Amazon.S3.Transfer;
using Amazon.S3.Util;
public static async Task<IActionResult> Run(HttpRequest req, ILogger log)
{
log.LogInformation("Example Function has recieved a HTTP Request");
// get Params from query string
string blobUri = req.Query["blobUri"];
string bucketName = req.Query["bucketName"];
// Validate query string
if (String.IsNullOrEmpty(blobUri) || String.IsNullOrEmpty(bucketName)) {
Result outcome = new Result("Invalid Parameters Passed to Function",false,"blobUri or bucketName is null or empty");
return new BadRequestObjectResult(outcome.ConvertResultToJson());
}
// cast the blob to its type
Uri blobAbsoluteUri = new Uri(blobUri);
CloudBlockBlob blob = new CloudBlockBlob(blobAbsoluteUri);
// Do the Copy
bool resultBool = await CopyBlob(blob, bucketName, log);
if (resultBool) {
Result outcome = new Result("Copy Completed",true,"Blob: " + blobUri + " Copied to Bucket: " + bucketName);
return (ActionResult)new OkObjectResult(outcome.ConvertResultToJson());
}
else {
Result outcome = new Result("ERROR",false,"Copy was not successful Please review Application Logs");
return new BadRequestObjectResult(outcome.ConvertResultToJson());
}
}
static async Task<bool> CopyBlob(CloudBlockBlob blob, string existingBucket, ILogger log) {
var accessKey = "myAwsKey";
var secretKey = "myAwsSecret";
var keyName = blob.Name;
// Make the client
AmazonS3Client myClient = new AmazonS3Client(accessKey, secretKey, Amazon.RegionEndpoint.EUWest1);
// Check the Target Bucket Exists;
bool bucketExists = await AmazonS3Util.DoesS3BucketExistAsync (myClient,existingBucket);
if (!bucketExists) {
log.LogInformation("Bucket: " + existingBucket + " does not exist or is inaccessible to the application");
return false;
}
// Set up the Transfer Utility
TransferUtility fileTransferUtility = new TransferUtility(myClient);
// Stream the file
try {
log.LogInformation("Starting Copy");
using (var stream = await blob.OpenReadAsync()) {
// Note: You need permissions to not be private on the source blob
log.LogInformation("Streaming");
await fileTransferUtility.UploadAsync(stream,existingBucket,keyName);
log.LogInformation("Streaming Done");
}
log.LogInformation("Copy completed");
}
catch (AmazonS3Exception e) {
log.LogInformation("Error encountered on server. Message:'{0}' when writing an object", e.Message);
}
catch (Exception e) {
log.LogInformation("Unknown encountered on server. Message:'{0}' when writing an object", e.Message);
return false;
}
return true;
}
public class Result {
public string result;
public bool outcome;
public string UTCtime;
public string details;
public Result(string msg, bool outcomeBool, string fullMsg){
result=msg;
UTCtime=DateTime.Now.ToString("yyyy-MM-dd h:mm:ss tt");
outcome=outcomeBool;
details=fullMsg;
}
public string ConvertResultToJson() {
return JsonConvert.SerializeObject(this);
}
}