public static bool ValidateUrl(string path, ref string filename)
{
Uri uri;
try {
uri = new Uri(path);
} catch (Exception ex) {
Debug.WriteLine(ex.Message);
return(false);
}
if (uri.IsFile)
{
return(File.Exists(uri.LocalPath));
}
var client = new HttpClient()
{
Timeout = new TimeSpan(0, 0, 10)
};
try {
HttpResponseMessage resTask = AsyncHelper.RunSync(() => client.SendAsync(new HttpRequestMessage(HttpMethod.Head, uri)));
if (string.IsNullOrEmpty(filename))
{
try {
if (resTask.Content.Headers.ContentDisposition != null)
{
filename = resTask.Content.Headers.ContentDisposition.FileName.Replace("\"", "");
}
else
{
filename = Path.GetFileName(uri.LocalPath);
}
} catch (Exception e) {
filename = RandomIdGenerator.GetRandomId(1, 15);
Console.WriteLine($"could not get filename from HEAD request. going with randomly generated '{filename}'. error: {e}");
}
}
else
{
// go with filename provided
}
return(true); // resTask.IsSuccessStatusCode; -> urls from our S3 downloads don't accept HEAD requests, but they do accept GET requests. that sucks.
} catch (TaskCanceledException ex) {
Console.WriteLine(ex.Message);
Console.WriteLine("resource at {0} not reachable", uri);
return(false);
} catch (Exception ex) {
Console.WriteLine(ex.Message);
Console.WriteLine("resource at {0} not reachable or other error", uri);
return(false);
}
}
public string GetTempDir()
{
return(Path.Combine(GetUploadsDir(), RandomIdGenerator.GetRandomId(3, 16)));
}