c# - 使用 webrequest 上传文件

Question

我正在尝试将图像上传到图像主机 http://uploads.im/。

根据其非常短的 API http://uploads.im/apidocs，这是一种实现方式:

http://uploads.im/api?upload=http://www.google.com/images/srpr/nav_logo66.png

请注意，在此示例中，他正在从互联网上传图片，而我正在尝试从我的计算机上传文件。

代码:

public ActionResult SaveUploadedFile()
{
    //Converts the image i want to upload to a bytearray
    Image postData = img;
    byte[] byteArray = imageToByteArray(postData);                

    //Is this adress not correct maybe? Is there a way to test?
    WebRequest wrq = WebRequest.Create("http://uploads.im/api?upload=");
    wrq.Method = ("POST");

    //Im thinking that here I need som code
    //that specifys the file i want to upload (bytearray)

    using (WebResponse wrs = wrq.GetResponse())
    using (Stream stream = wrs.GetResponseStream())
    using (StreamReader reader = new StreamReader(stream))
    {
        string json = reader.ReadToEnd();
        tempJson = json;
    }
}

请看!谢谢!

编辑，新代码:

string filepath = @"c:\Users\xxxx\Desktop\Bilder\images\blank.gif";

using (WebClient client = new WebClient())
{
    client.UploadFile("http://uploads.im/api?upload", filepath);
}

我收到错误::底层连接已关闭

用 try catch 编辑:

string filepath = @"c:\Users\xxxx\Desktop\sack.png";
using (WebClient client = new WebClient())
{
    try
    {
        client.UploadFile("http://uploads.im/api?upload", filepath);
    }
    catch (Exception e)
    {
        throw new ApplicationException(e);
    }
}

Answer 1

private void UploadImage(string filepath)
{

    using(WebClient uploader = new WebClient())
    {
        try
        {
            uploader.UploadFile(new Uri("http://uploads.im/api?upload"), filepath);
        }
        catch(Exception ex)
        {
            MessageBox.Show("An error occured :(\r\n" + ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
    }

}

我正在使用 http://uploads.im/api?upload 作为端点，因为正如在文档中所读，它将被视为 REQUEST 并将自动检测图像的上传。
但是，我自己尝试了这段代码，每次都断开连接，没有任何有意义的响应，只是 The remote host unexpectedly closed the connection。根据文档，当出现问题时，您应该得到一个 Bad request。我联系了支持人员，希望他们能告诉我更多相关信息。 (编辑:他们没有)