public static string Upload(this Uri uri, NameValueCollection collection, UriContext context)
{
return uri.DownloadImpl(context, (client, u) =>
{
var response = client.UploadValues(u, "POST", collection);
return Encoding.UTF8.GetString(response);
});
}
public static string Download(this Uri uri, UriContext context, Action<Exception> handler)
{
try
{
return uri.DownloadImpl(context, (client, u) => client.DownloadString(u));
}
catch (Exception e)
{
if (handler != null)
{
handler(e);
return string.Empty;
}
throw;
}
}
private static string DownloadImpl(this Uri uri, UriContext context, Func<WebClient, Uri, string> grab)
{
context = context ?? UriContext.Default;
using (var client = new WebClient())
{
client.Encoding = context.Encoding ?? Encoding.UTF8;
if (context.IncludeDefaultHeaders)
{
// TODO: pass those via context
client.Headers.Add(HttpRequestHeader.Accept, "text/html,application/xhtml+xml,application/xml");
client.Headers.Add(HttpRequestHeader.AcceptLanguage, "en-US,en;q=0.5");
client.Headers.Add(HttpRequestHeader.Referer, "http://www.xboxachievements.com/search.php");
client.Headers.Add(HttpRequestHeader.ContentType, "application/x-www-form-urlencoded");
}
// headers given with context should overwrite default headers
client.Headers.Add(context.Headers ?? new NameValueCollection());
return grab(client, uri);
}
}
public static string Download(this Uri uri, UriContext context)
{
return Download(uri, context, exception => { }); // suppressing exception by default
}