// Tries to load liquid templates from local folder
private static async Task<LiquidTemplatesMap> GetTabTemplatesFromFolderAsync(string folderName)
{
var result = new LiquidTemplatesMap();
string binFolder = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
string templatesFolder = Path.Combine(binFolder, "..", folderName, Globals.TabTemplateFolderName);
if (!Directory.Exists(templatesFolder))
{
return result;
}
foreach(var templateFilePath in Directory.EnumerateFiles(templatesFolder, "*.liquid"))
{
var nameParts = Path.GetFileName(templateFilePath).Split('.');
if(nameParts.Length < 2)
{
continue;
}
string tabName = nameParts[0];
string entityTypeName = nameParts.Length > 2 ? nameParts[1] : string.Empty;
string templateText = await File.ReadAllTextAsync(templateFilePath);
result.GetOrAdd(entityTypeName, new ConcurrentDictionary<string, string>())[tabName] = templateText;
}
return result;
}
// Tries to load liquid templates from underlying Azure Storage
private static async Task <LiquidTemplatesMap> GetTabTemplatesFromStorageAsync()
{
var result = new LiquidTemplatesMap();
try
{
string connectionString = Environment.GetEnvironmentVariable(EnvVariableNames.AzureWebJobsStorage);
var blobClient = CloudStorageAccount.Parse(connectionString).CreateCloudBlobClient();
// Listing all blobs in durable-functions-monitor/tab-templates folder
var container = blobClient.GetContainerReference(Globals.TemplateContainerName);
string templateFolderName = Globals.TabTemplateFolderName + "/";
var templateNames = await container.ListBlobsAsync(templateFolderName);
// Loading blobs in parallel
await Task.WhenAll(templateNames.Select(async templateName =>
{
var blob = await blobClient.GetBlobReferenceFromServerAsync(templateName.Uri);
// Expecting the blob name to be like "[Tab Name].[EntityTypeName].liquid" or just "[Tab Name].liquid"
var nameParts = blob.Name.Substring(templateFolderName.Length).Split('.');
if (nameParts.Length < 2 || nameParts.Last() != "liquid")
{
return;
}
string tabName = nameParts[0];
string entityTypeName = nameParts.Length > 2 ? nameParts[1] : string.Empty;
using (var stream = new MemoryStream())
{
await blob.DownloadToStreamAsync(stream);
string templateText = Encoding.UTF8.GetString(stream.ToArray());
result.GetOrAdd(entityTypeName, new ConcurrentDictionary <string, string>())[tabName] = templateText;
}
}));
}
catch (Exception)
{
// Intentionally swallowing all exceptions here
}
return(result);
}