CODEWITHSUNDEEP
c#asp.net
Raniel Quirante
Raniel Quirante

Reputation: 315

WebRequest.GetResponse Error: Underlying Connection - C# Asp.Net

Below is my code for this HttpWebRequest. I was wondering why I can use this code on google.com or facebook.com.

While on this particular site which is below, I got this error The underlying connection was closed: An unexpected error occurred on a send.

What else do I need to add in my code to make this work? do you guys have an idea? I searched that I need certificate or trusted certificates to make an http request, but how can I implement this on my code? 

protected void Button1_Click(object sender, EventArgs e)
{
    WebRequest MyWebRequest;
    WebResponse MyWebResponse;
    StreamReader sr;
    string strHTML;
    StreamWriter sw;

    MyWebRequest = HttpWebRequest.Create("https://qiita.com/naoki_mochizuki/items/3fda1ad6594c11d7b43c");
    MyWebResponse = MyWebRequest.GetResponse();
    sr = new StreamReader(MyWebResponse.GetResponseStream());
    strHTML = sr.ReadToEnd();

    string path = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);  

    sw = File.CreateText(@path +"\\"+TextBox1.Text+"");
    sw.WriteLine(strHTML);

    sw.Close();               

}

Upvotes: 1

Views: 72

Answers (2)

Raniel Quirante
Raniel Quirante

Reputation: 315

I added this code to solve this issue

ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072;

Upvotes: 1

ngeksyo
ngeksyo

Reputation: 437

Make use of the CreateHttp static helper method instead of Create.

The reason for this is that you have a property ServerCertificateValidationCallback which is a delegate that will let you allow to customize the action on certification validation.

In the case below, i have set it to statically return true to proceed or allow the request.

HttpWebRequest MyWebRequest;
WebResponse MyWebResponse;
StreamReader sr;
string strHTML;
StreamWriter sw;
MyWebRequest = (HttpWebRequest)HttpWebRequest.Create("https://qiita.com/naoki_mochizuki/items/3fda1ad6594c11d7b43c");
MyWebRequest.ServerCertificateValidationCallback = (snd, cert, chain, err) => true;

Upvotes: 1

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