Use Proxy and Headers in AngleSharp.Io - http

Question

I am trying to get AngleSharp to use both a proxy and set header properties like this:
var handler = new HttpClientHandler
{
Proxy = new WebProxy(ProxyMan.GetProxy()),
UseProxy = true,
PreAuthenticate = true,
UseDefaultCredentials = false
};
var requester = new DefaultHttpRequester();
requester.Headers["User-Agent"] = Tools.GetAgentString();
requester.Headers["Accept-Language"] = "en-US";
requester.Headers["Accept-Charset"] = "ISO-8859-1";
requester.Headers["Content-Type"] = "text/html; charset=UTF-8";
var config = Configuration.Default
.WithRequesters(handler)
.With(requester)
.WithTemporaryCookies()
.WithDefaultLoader();
var context = BrowsingContext.New(config);
var doc = await context.OpenAsync(Url);
When I added the Header requester, it stopped the proxy handler from working. I know there is some conflict between the .WithRequesters() and the .With() but I cannot locate the proper syntax for doing both in the same request.
Thanks.

Answer 1

Yeah I am not sure why you use both.
The DefaultHttpRequester is the requester from AngleSharp and uses WebClient underneath
WithRequesters comes from AngleSharp.Io and adds all available requesters (incl. HttpClientRequester)
WithDefaultLoader puts a loader into the config and registers the default HTTP requester, if no other requester has been registered yet
I think what you want to do should be actually done using the HttpClientRequester directly.
var handler = new HttpClientHandler
{
Proxy = new WebProxy(ProxyMan.GetProxy()),
UseProxy = true,
PreAuthenticate = true,
UseDefaultCredentials = false,
UseCookies = false,
AllowAutoRedirect = false
};
var client = new HttpClient(handler);
client.DefaultRequestHeaders.Append("User-Agent", Tools.GetAgentString());
// ... and the others if you want, even though `content-type` etc. should / will be determined by AngleSharp
var config = Configuration.Default
.With(new HttpClientRequester(client))
.WithTemporaryCookies()
.WithDefaultLoader();
var context = BrowsingContext.New(config);
var doc = await context.OpenAsync(Url);