Question

ASP.NET Core MVC 2

我需要将二进制数据发送到服务器。数据大小通常很大但不超过1 Gb。这是我尝试这样做的：

var client = new HttpClient();

using (FileStream fs = new FileStream(fileName, FileMode.Open))
{
    fs.Position = 0;
    byte[] bytes = new byte[fs.Length];
    fs.Read(bytes, 0, (int) fs.Length);

    ByteArrayContent content = new ByteArrayContent(bytes);
    content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
    content.Headers.ContentLength = fs.Length;

    var request = new HttpRequestMessage(HttpMethod.Post, "http://localhost:5000/Home/Upload");
    request.Content = content;

    try
    {
        HttpResponseMessage response = await client.SendAsync(request);
        Console.WriteLine("Response status code: {0}", response.StatusCode);
    }
    catch (Exception ex)
    {
        Console.WriteLine("Exception: {0}", ex.Message);
    }
}

在调试模式下，我尝试发送27Mb数据。在行

HttpResponseMessage response = await client.SendAsync(request);

断点有效，但在此之后没有任何事情发生：

的断点

Console.WriteLine("Response status code: {0}", response.StatusCode);

和

Console.WriteLine("Exception: {0}", ex.Message);

不行。应用程序默默完成。

我做错了什么？

Answer 1

无需使用ByArrayContent，只需将StreamContent与PostAsync一起使用。

删除以下代码

fs.Position = 0;
byte[] bytes = new byte[fs.Length];
fs.Read(bytes, 0, (int) fs.Length);

ByteArrayContent content = new ByteArrayContent(bytes);
content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
content.Headers.ContentLength = fs.Length;

var request = new HttpRequestMessage(HttpMethod.Post, "http://localhost:5000/Home/Upload");
request.Content = content;

try
{
    HttpResponseMessage response = await client.SendAsync(request);

替换为以下代码，HttpClient包含PostAsync我们可以使用

try
{
     HttpResponseMessage response = await client.PostAsync("http://localhost:5000/Home/Upload", new StreamContent(fs));

通过HTTP协议发布大数据

1 个答案: