public static async Task <object> Run([HttpTrigger(WebHookType = "genericJson")] HttpRequestMessage req, TraceWriter log)
{
log.Info($"AMS v2 Function - GetCaptionBlobSasUri was triggered!");
string jsonContent = await req.Content.ReadAsStringAsync();
dynamic data = JsonConvert.DeserializeObject(jsonContent);
// parameter handling
if (data.assetId == null)
{
return(req.CreateResponse(HttpStatusCode.BadRequest, new { error = "Please pass assetId in the input object" }));
}
string assetId = data.assetId;
string timecodeOffset = null;
if (data.timecodeOffset != null)
{
timecodeOffset = data.timecodeOffset;
}
MediaServicesCredentials amsCredentials = new MediaServicesCredentials();
IAsset asset = null;
string vttContent = "";
string vttContentTimeOffset = "";
string vttBlobSasUri = null;
string ttmlContent = "";
string ttmlContentTimeOffset = "";
string ttmlBlobSasUri = null;
try
{
// Load AMS account context
log.Info($"Using AMS v2 REST API Endpoint : {amsCredentials.AmsRestApiEndpoint.ToString()}");
AzureAdTokenCredentials tokenCredentials = new AzureAdTokenCredentials(amsCredentials.AmsAadTenantDomain,
new AzureAdClientSymmetricKey(amsCredentials.AmsClientId, amsCredentials.AmsClientSecret),
AzureEnvironments.AzureCloudEnvironment);
AzureAdTokenProvider tokenProvider = new AzureAdTokenProvider(tokenCredentials);
_context = new CloudMediaContext(amsCredentials.AmsRestApiEndpoint, tokenProvider);
// Get the Asset
asset = _context.Assets.Where(a => a.Id == assetId).FirstOrDefault();
if (asset == null)
{
return(req.CreateResponse(HttpStatusCode.BadRequest, new { error = "Asset not found" }));
}
string destinationContainerName = asset.Uri.Segments[1];
var vttAssetFile = asset.AssetFiles.Where(a => a.Name.ToUpper().EndsWith(".VTT")).FirstOrDefault();
var ttmlAssetFile = asset.AssetFiles.Where(a => a.Name.ToUpper().EndsWith(".TTML")).FirstOrDefault();
if (vttAssetFile != null)
{
vttContent = MediaServicesHelper.GetContentFromAssetFile(vttAssetFile);
CloudBlobContainer destinationBlobContainer = BlobStorageHelper.GetCloudBlobContainer(BlobStorageHelper.AmsStorageAccountName, BlobStorageHelper.AmsStorageAccountKey, destinationContainerName);
CloudBlockBlob blobVTT = destinationBlobContainer.GetBlockBlobReference(vttAssetFile.Name);
if (timecodeOffset != null) // let's update the ttml with new timecode
{
var tcOffset = TimeSpan.Parse(timecodeOffset);
string arrow = " --> ";
System.Text.StringBuilder sb = new System.Text.StringBuilder();
string[] delim = { Environment.NewLine, "\n" }; // "\n" added in case you manually appended a newline
string[] vttlines = vttContent.Split(delim, StringSplitOptions.None);
foreach (string vttline in vttlines)
{
string line = vttline;
if (vttline.Contains(arrow))
{
TimeSpan begin = TimeSpan.Parse(vttline.Substring(0, vttline.IndexOf(arrow)));
TimeSpan end = TimeSpan.Parse(vttline.Substring(vttline.IndexOf(arrow) + 5));
line = (begin + tcOffset).ToString(@"d\.hh\:mm\:ss\.fff") + arrow + (end + tcOffset).ToString(@"d\.hh\:mm\:ss\.fff");
}
sb.AppendLine(line);
}
vttContentTimeOffset = sb.ToString();
if (vttContentTimeOffset != null)
{
string blobName = "Converted-" + vttAssetFile.Name;
blobVTT = MediaServicesHelper.WriteContentToBlob(asset, destinationBlobContainer, blobName, vttContentTimeOffset);
}
}
// Get Blob URI with SAS Token
var sasBlobPolicy = new SharedAccessBlobPolicy();
sasBlobPolicy.SharedAccessStartTime = DateTime.UtcNow.AddMinutes(-5);
sasBlobPolicy.SharedAccessExpiryTime = DateTime.UtcNow.AddMinutes(10);
sasBlobPolicy.Permissions = SharedAccessBlobPermissions.Read;
string sasBlobToken = blobVTT.GetSharedAccessSignature(sasBlobPolicy);
vttBlobSasUri = blobVTT.Uri + sasBlobToken;
}
if (ttmlAssetFile != null)
{
ttmlContent = MediaServicesHelper.GetContentFromAssetFile(ttmlAssetFile);
CloudBlobContainer destinationBlobContainer = BlobStorageHelper.GetCloudBlobContainer(BlobStorageHelper.AmsStorageAccountName, BlobStorageHelper.AmsStorageAccountKey, destinationContainerName);
CloudBlockBlob blobTTML = destinationBlobContainer.GetBlockBlobReference(ttmlAssetFile.Name);
if (timecodeOffset != null) // let's update the vtt with new timecode
{
var tcOffset = TimeSpan.Parse(timecodeOffset);
//log.Info("tsoffset : " + tcOffset.ToString(@"d\.hh\:mm\:ss\.fff"));
XNamespace xmlns = "http://www.w3.org/ns/ttml";
XDocument docXML = XDocument.Parse(ttmlContent);
var tt = docXML.Element(xmlns + "tt");
var ttmlElements = docXML.Element(xmlns + "tt").Element(xmlns + "body").Element(xmlns + "div").Elements(xmlns + "p");
foreach (var ttmlElement in ttmlElements)
{
var begin = TimeSpan.Parse((string)ttmlElement.Attribute("begin"));
var end = TimeSpan.Parse((string)ttmlElement.Attribute("end"));
ttmlElement.SetAttributeValue("end", (end + tcOffset).ToString(@"d\.hh\:mm\:ss\.fff"));
ttmlElement.SetAttributeValue("begin", (begin + tcOffset).ToString(@"d\.hh\:mm\:ss\.fff"));
}
ttmlContentTimeOffset = docXML.Declaration.ToString() + Environment.NewLine + docXML.ToString();
if (ttmlContentTimeOffset != null)
{
string blobName = "Converted-" + ttmlAssetFile.Name;
blobTTML = MediaServicesHelper.WriteContentToBlob(asset, destinationBlobContainer, blobName, ttmlContentTimeOffset);
}
}
// Get Blob URI with SAS Token
var sasBlobPolicy = new SharedAccessBlobPolicy();
sasBlobPolicy.SharedAccessStartTime = DateTime.UtcNow.AddMinutes(-5);
sasBlobPolicy.SharedAccessExpiryTime = DateTime.UtcNow.AddMinutes(10);
sasBlobPolicy.Permissions = SharedAccessBlobPermissions.Read;
string sasBlobToken = blobTTML.GetSharedAccessSignature(sasBlobPolicy);
ttmlBlobSasUri = blobTTML.Uri + sasBlobToken;
}
}
catch (Exception e)
{
log.Info($"Exception {e}");
return(req.CreateResponse(HttpStatusCode.BadRequest));
}
return(req.CreateResponse(HttpStatusCode.OK, new
{
vttBlobSasUri = vttBlobSasUri,
ttmlBlobSasUri = ttmlBlobSasUri
}));
}