Question

I’m currently developing an IE plugin using SpicIE.

This plugin does some web scraping similar to the example posted on MSDN:

WebRequest request = WebRequest.Create ('http://www.contoso.com/default.html');  request.Credentials = CredentialCache.DefaultCredentials;  HttpWebResponse response = (HttpWebResponse)request.GetResponse ();  Stream dataStream = response.GetResponseStream ();  StreamReader reader = new StreamReader (dataStream);  string responseFromServer = reader.ReadToEnd ();  reader.Close (); dataStream.Close (); response.Close (); 

However, when i run this code i receive the following error message:

The remote server returned an error: (407) Proxy Authentication Required.

I’m currently working behind a proxy server and used the NetworkCredential class to manually provide my network credentials

request.Credentials = new System.Net.NetworkCredential('name', 'password', 'domain'); 

but i still receive the same error.

Even if my problem is solved, i know that some users of the plugin will be behind a proxy server.

I want to know how i can get IE credentials and use it in my code to assign it to request.Credentials.

Maybe something like this:

request.Credentials = IE.DefaultCredentials; 

Answer 1

You’re setting the credentials for the site, but you need credentials for the proxy.

Set request.Proxy.Credentials.

(Also, use using statements for the response/stream/reader rather than manually closing them, otherwise they’ll leak when an exception is thrown.)

EDIT: For instance, to use the default credentials for the proxy as well:

request.Proxy.Credentials = CredentialCache.DefaultCredentials;