How to Fix 'Unexpected Error on a Send' When Using Basic Authentication with HttpWebRequest?

Troubleshooting "Unexpected Error on Send" in HttpWebRequest with Basic Authentication

Using basic authentication with HttpWebRequest can sometimes result in an "unexpected error on a send" message. This issue is often resolved by manually adding the authorization header to your request.

The solution involves encoding your username and password as a Base64 string, ensuring compatibility across various HTTP servers. The System.Convert.ToBase64String method, combined with the ISO-8859-1 encoding, achieves this:

<code class="language-csharp">string username = "abc";
string password = "123";
string encoded = Convert.ToBase64String(Encoding.GetEncoding("ISO-8859-1").GetBytes(username + ":" + password));</code>

Next, append this encoded string to the "Basic" authentication scheme and add it as an "Authorization" header to your HttpWebRequest object:

<code class="language-csharp">httpWebRequest.Headers.Add("Authorization", "Basic " + encoded);</code>

This manual header addition, using the specified encoding, ensures proper communication with servers requiring basic authentication, thereby preventing the "unexpected error on send" during the request process.

The above is the detailed content of How to Fix 'Unexpected Error on a Send' When Using Basic Authentication with HttpWebRequest?. For more information, please follow other related articles on the PHP Chinese website!