HttpWebRequest上传超过2G文件问题

问题

Unity使用HttpWebRequest上传文件超过2G是没问题的，但是移植到.NET Core里，同样的代码问题就来了！Unity使用.net framework框架。

解决

.NET Core使用HttpClient代替HttpWebRequest！

核心代码

var fileName = Path.GetFileName(fileNamePath);
using (var fClient = new HttpClient())
{
    fClient.MaxResponseContentBufferSize = 256000;
    fClient.Timeout = new TimeSpan(Timeout * 10000L);
    fClient.DefaultRequestHeaders.Add("cookie", this.Session);
    fileStream = File.Open(fileNamePath, FileMode.Open, FileAccess.Read);
    var streamContent = new StreamContent(fileStream);
    streamContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data");
    streamContent.Headers.ContentDisposition.Name = "\""+saveName + "\"";
    streamContent.Headers.ContentDisposition.FileName = "\"" + fileName + "\"";
    streamContent.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
    //string boundary = Guid.NewGuid().ToString();
    string boundary = "----------" + DateTime.Now.Ticks.ToString("x");
    var content = new MultipartFormDataContent(boundary);
    content.Headers.Remove("Content-Type");
    content.Headers.TryAddWithoutValidation("Content-Type", "multipart/form-data; boundary=" + boundary);

    content.Add(streamContent);

    var response = await fClient.PostAsync(new Uri(url), content);
    response.EnsureSuccessStatusCode();
    this.Data = await response.Content.ReadAsStringAsync();

    streamContent.Dispose();
    fileStream.Dispose();
}

注意

• 上传进度使用fileStream.Position
• .net framework跟.net core之间，相同的代码时，部分功能不一定相同，比如HttpWebRequest上传文件功能