A Library that helps the User to deal with short-lived Streams that are too large to just keep in memory. An Example of such a usecase could be: Your logic needs to download a file, perform some operations on it and upload it somewhere else.
'TempFile' helps by providing a Stream to a Temp-File that you wan write to/read from and gets deleted as soon as it is disposed.
using TempFile;Writing to a 'TempFileStream' is very similar to a normal Stream. To delete of the File, either use a using-block or manually dispose the Stream.
await using (var tempFile = new TempFileStream())
{
await tempFile.WriteAsync(Encoding.UTF8.GetBytes("Test"));
// Flush forces write to disk
await tempFile.FlushAsync();
// At this point, the Temp-File still exists
}
// As soon as we leave the using-block, the Temp-File is deletedWhen working with the 'TempFile' you normally also want to read from it. 'TempFileStream' acts like any normal Stream, where you can reset the Position.
var path = string.Empty;
await using (var tempFile = new TempFileStream())
{
path = tempFile.FilePath;
var writer = new StreamWriter(tempFile, Encoding.UTF8);
for (int i = 0; i < 5; i++)
{
await writer.WriteLineAsync($"Test {i}");
}
// Making sure that the data is written to disk and not still in a buffer
await writer.FlushAsync();
Console.WriteLine("Data has been written");
Console.WriteLine($"Temp-File is at: {path}");
Console.WriteLine("Press ENTER to proceed");
Console.ReadLine();
// We need to reset the Position of the Stream before we can read what was written before
tempFile.Position = 0;
var reader = new StreamReader(tempFile, Encoding.UTF8);
while (!reader.EndOfStream)
{
Console.WriteLine(await reader.ReadLineAsync());
}
Console.WriteLine($"File Exists before exiting using-block: {File.Exists(path)}");
}
Console.WriteLine($"File Exists after exiting using-block: {File.Exists(path)}");
Console.ReadLine();