1 [HttpGet("GetStream")]
 2 public async Task GetStream()
 3 {
 4     string filePath = "文檔.txt";
 5     Response.ContentType = "application/octet-stream";
 6     var reader = new StreamReader(filePath);
 7     var buffer = new Memory<char>(new char[5]);
 8     int writeLength;
 9     //每次讀取5個字符寫入到流中
10     while ((writeLength = await reader.ReadBlockAsync(buffer)) > 0)
11     {
12         if (writeLength < buffer.Length)
13         {
14             buffer = buffer[..writeLength];
15         }
16         var value = buffer.ToString();
17         await Response.WriteAsync(value);
18         await Task.Delay(100);
19     }
20 }

 1 [HttpGet("TestGetStream")]
 2 public async Task TestGetStream([FromServices] IHttpClientFactory httpClientFactory)
 3 {
 4     using var client = httpClientFactory.CreateClient();
 5     using var stream = await client.GetStreamAsync("http://localhost:5237/api/Test/GetStream");
 6     using var streamReader = new StreamReader(stream);
 7     var buffer = new char[5];
 8     int writeLength;
 9     while ((writeLength = await streamReader.ReadBlockAsync(buffer, 0, buffer.Length)) > 0)
10     {
11         Console.Write(new string(buffer, 0, writeLength));
12     }
13     Console.WriteLine("\nEND");
14 }