/// <summary>
/// Makes a usable URL for a blob. This will need to handle security on the source blob.
/// Each cloud provider is different.
/// Cloud providers developed:
/// Azure
/// S3xx
///
/// Cloud providers soon:
/// Dropbox
/// Onedrive
/// </summary>
/// <param name="origBlob"></param>
/// <returns></returns>
private static string GeneratedAccessibleUrl(BasicBlobContainer origBlob)
{
var sourceUrl = origBlob.Url; // +"/" + origBlob.Name;
string url = "";
// if S3, then generate signed url.
if (S3Helper.MatchHandler(sourceUrl))
{
var bucket = S3Helper.GetBucketFromUrl(sourceUrl);
var key = origBlob.Name;
url = S3Helper.GeneratePreSignedUrl(bucket, key);
}
else if (AzureHelper.MatchHandler(sourceUrl))
{
// generate Azure signed url.
var client = AzureHelper.GetSourceCloudBlobClient(sourceUrl);
var policy = new SharedAccessBlobPolicy();
policy.SharedAccessStartTime = DateTime.UtcNow.AddMinutes(-1);
policy.SharedAccessExpiryTime = DateTime.UtcNow.AddMinutes(ConfigHelper.SharedAccessSignatureDurationInSeconds / 60);
policy.Permissions = SharedAccessBlobPermissions.Read;
var blob = client.GetBlobReferenceFromServer(new Uri(sourceUrl));
url = sourceUrl + blob.GetSharedAccessSignature(policy);
}
else if (DropboxHelper.MatchHandler(sourceUrl))
{
// need shorter url. (no base url);
var uri = new Uri(sourceUrl);
var shortUrl = uri.PathAndQuery;
var client = DropboxHelper.GetClient();
var media = client.GetMedia(shortUrl);
return(media.Url);
}
else if (SkyDriveHelper.MatchHandler(sourceUrl))
{
throw new NotImplementedException("Blobcopy against onedrive is not implemented yet");
}
Console.WriteLine("shared url is {0}", url);
return(url);
}