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什么是httpcontext.current.response

-1

Jee Mok ecanf · 技术社区 · 8 年前

我试图创建一个新的端点来从服务器下载文件。示例来自 https://forums.asp.net/t/2010544.aspx?Download+files+from+website+using+Asp+net+c+ 这就是我的结局:

[Route("{id}/file")]
[HttpGet]
public IHttpActionResult GetFile(int id)
{
    var filePath = $"C:\\Static\\File_{id}.pdf";

    var response = HttpContext.Current.Response;
    var data = new WebClient().DownloadData(filePath);

    response.Clear();
    response.ClearContent();
    response.ClearHeaders();
    response.Buffer = true;
    response.AddHeader("Content-Disposition", "attachment");
    response.BinaryWrite(data);
    response.End();

    return Ok(response);
}

但我不确定是否需要这些:

    response.Clear();
    response.ClearContent();
    response.ClearHeaders();
    response.Buffer = true;
    response.BinaryWrite(data);
    response.End();

这些是做什么的?

1 回复 | 直到 8 年前

MKougiouris 8 年前

response.Clear(); -> Will clear the content of the body of the response ( any html for example that was supposed to be served back, you can remove this)
response.ClearContent(); -> will clear any content in the response ( that is why you can remove the previous Clear call i think )
response.ClearHeaders(); -> Clears all headers asscociated with the response. (For example a header might tell the client there is 'encoding:gzip')
response.Buffer = true; -> enables response buffer
response.BinaryWrite(data); -> Appends your binary data to the content of the response( you cleared it earlier so now only this is contained)
response.End(); -> Terminates the current response handling and returns the response to the client.

here!