Autofill Proxy requirements webview2

Question

I'm creating a custom internet browser using winforms and webview2 and whenever I search for something when using say a school internet it has a proxy box asks for my username and password. How can I autofill this box every time it opens

Ideally you should be able to the proxy in options, but it doesn't seem to have been fixed yet: https://github.com/MicrosoftEdge/WebView2Feedback/issues/193#issuecomment-663046277 — Poul Bak, Feb 18 '21 at 17:19
not completely sure if its Javascript, It only pops up if I 1. Haven't connected to that internet today. or 2. I reconnected to it. — Redstone145, Feb 19 '21 at 06:04

Reza Aghaei · Answer 1 · 2021-02-18T10:18:29.380

There are command-line options for proxy settings. You can set those options through AdditionalBrowserArguments property of an instance of CoreWebView2EnvironmentOptions and pass to CoreWebView2Environment.CreateAsync when creating the CoreWebView2.

For example:

WebView2 webView21 = new Microsoft.Web.WebView2.WinForms.WebView2();
private async void Form1_Load(object sender, EventArgs e)
{
    var options = new CoreWebView2EnvironmentOptions();
    options.AdditionalBrowserArguments = "--proxy-server=\"proxyhostname:8000\"";
    var env = await CoreWebView2Environment.CreateAsync(null, null, options);
    await webView21.EnsureCoreWebView2Async(env);

    webView21.Dock = DockStyle.Fill;
    this.Controls.Add(webView21);
    webView21.Source = new Uri("Https://stackoverflow.com");
}

Here are the options that you can use:

--no-proxy-server: Not to use proxy.
--proxy-auto-detect: Automatically detect proxy configuration.
--proxy-server=<scheme>=<uri>[:<port>][;...] | <uri>[:<port>] | "direct://": Use custom configurations.
--proxy-bypass-list=(<trailing_domain>|<ip-address>)[:<port>][;...]: Bypass any specified proxy for the specified semicolon-separated list of hosts.
--proxy-pac-url=<pac-file-url>: To use the PAC file at the specified URL.

To see more description and example about those options see:

How to use Microsoft Edge command-line options to configure proxy settings

I guess the username/password box which is being asked in the OP's question is a basic authentication/authentication challenge window, or may be a HTML login page. OP needs to provide more details/MCVE (if possible) for the question. — Reza Aghaei, Feb 18 '21 at 19:08

score 0 · Answer 2 · edited Apr 14 '22 at 11:57

WebView2 webView21 = new Microsoft.Web.WebView2.WinForms.WebView2();

var options = new CoreWebView2EnvironmentOptions();
options.AdditionalBrowserArguments = "--proxy-server=\"" + proxy.Address.Host + ":" + proxy.Address.Port + "\"";
var env = await CoreWebView2Environment.CreateAsync(null, null, options);
await webView21.EnsureCoreWebView2Async(env);

webView21.CoreWebView2.BasicAuthenticationRequested += new EventHandler<CoreWebView2BasicAuthenticationRequestedEventArgs>(delegate (object? sender, CoreWebView2BasicAuthenticationRequestedEventArgs e)
{
    var _credential = proxy == null ? null : proxy?.Credentials as NetworkCredential;
    if (_credential != null)
    {
        e.Response.UserName = _credential.UserName;
        e.Response.Password = _credential.Password;
     }
});

Autofill Proxy requirements webview2

2 Answers2