public static Stream ReadStream(string streamPath)
{
var certificate = CertificateGenerator.GetCertificateByThumbprint();
VC.Setup(null, certificate);
return(VC.ReadStream(streamPath, true));
}
// Function VcClient.VC.StreamExists(string streamName) just can check the existance of file not directory.
public static bool CheckStreamExists(string streamPath)
{
var certificate = CertificateGenerator.GetCertificateByThumbprint();
VC.Setup(null, certificate);
// Function VC.StreamExists will return false if the input is path of a directory.
return(VC.StreamExists(streamPath));
}
/// <summary>
/// Upload a file to the VC using the method overload which will preserve line boundaries on large files.
/// </summary>
/// <param name="source">Path to the local file.</param>
/// <param name="dest">Desired stream location.</param>
/// <param name="expiryDays">Expiry in days (if null, will use default of 30 days).</param>
public static void UploadFile(string source, string dest, int?expiryDays = null)
{
var certificate = CertificateGenerator.GetCertificateByThumbprint();
VC.Setup(null, certificate);
var fi = new FileInfo(source);
VC.Upload(source, dest, 0, fi.Length, false, TimeSpan.FromDays(expiryDays ?? 30), false);
}
// We can use VcClient.VC.DirectoryExists(string directoryName) to check the existance of directory.
public static bool CheckDirectoryExists(string directoryPath)
{
var certificate = CertificateGenerator.GetCertificateByThumbprint();
VC.Setup(null, certificate);
// Function VC.DirectoryExists will return true if the input is path of a directory.
// The input parameter name is directoryName, same as StreamInfo.StreamName . It is just the path.
return(VC.DirectoryExists(directoryPath));
}
public static long?GetRowCount(string streamPath)
{
var certificate = CertificateGenerator.GetCertificateByThumbprint();
var settings = new Microsoft.Cosmos.ExportClient.ScopeExportSettings();
settings.Path = streamPath;
settings.ClientCertificate = certificate;
var exportClient = new Microsoft.Cosmos.ExportClient.ExportClient(settings);
try
{
return(exportClient.GetRowCount(null).Result);
}
// we cannot catch the exception "CosmosFileNotFoundException" by using CosmosUriException,
//catch (Microsoft.Cosmos.CosmosUriException e)
// and we either cannot use this exception "CosmosFileNotFoundException".
// For the asynchronous function GetRowCount(We can see its return is a subclass of Task), its exception will be packaged as AggregateException, we cannot directly catch it.
catch (CosmosFileNotFoundException e)
{
return(null);
}
// We just can catch AggregateException and judge it in AggregateException.InnerException
// AggregateException: Represents one or more errors that occur during application execution.
// Doc link: https://docs.microsoft.com/en-us/dotnet/api/system.aggregateexception?view=netframework-4.8
catch (AggregateException e)
{
// Here we just want to catch the Exception "CosmosFileNotFoundException", if it is not the reason, we will throw the exception.
if (e.InnerException.GetType() == typeof(CosmosFileNotFoundException))
{
Console.WriteLine("Cannot find the file...");
return(null);
}
if (e.InnerException.GetType() == typeof(CosmosDirectoryNotFoundException))
{
Console.WriteLine("Cannot find the directory...");
return(null);
}
if (e.InnerException.GetType() == typeof(CosmosArgumentException))
{
Console.WriteLine($"CosmosArgumentException...{e.InnerException.Message}");
return(null);
}
throw;
}
// This can catch any exception..
catch (Exception e)
{
Console.WriteLine($"Message: {e}; Type: {e.GetType()}");
return(null);
}
}
public static List <JToken> GetStreamInfos(string directoryPath)
{
var certificate = CertificateGenerator.GetCertificateByThumbprint();
VC.Setup(null, certificate);
List <JToken> streamInfoJTokens = new List <JToken>();
List <StreamInfo> streamInfos = VC.GetDirectoryInfo(directoryPath, true);
foreach (var streamInfo in streamInfos)
{
streamInfoJTokens.Add(JToken.Parse(JsonConvert.SerializeObject(streamInfo)));
}
return(streamInfoJTokens);
}
// This function also just can check the existing of file not directory.
public static bool CheckExists(string streamPath, out long rowCount)
{
var certificate = CertificateGenerator.GetCertificateByThumbprint();
var settings = new Microsoft.Cosmos.ExportClient.ScopeExportSettings();
settings.Path = streamPath;
settings.ClientCertificate = certificate;
var exportClient = new Microsoft.Cosmos.ExportClient.ExportClient(settings);
try
{
rowCount = exportClient.GetRowCount(null).Result;
return(true);
}
catch (Exception e)
{
Console.WriteLine($"Message: {e.Message}; Type: {e.GetType()}");
rowCount = -1;
return(false);
}
}
public CosmosClient()
{
var certificate = CertificateGenerator.GetCertificateByThumbprint();
VC.Setup(null, certificate);
}
