public async Task <bool> Check(string word)
{
word = word.ToLower(); //normalize
if (WordCache.ContainsKey(word))
{
return(WordCache.Value(word)); //if known word, skip web stuff
}
//https://www.dictionary.com/browse/<word> use status code to save time... maybe?
var request = (HttpWebRequest)WebRequest.Create($"https://www.dictionary.com/browse/{word}");
request.Method = "HEAD"; //HEAD method doesn't return a body
try
{
using (var response = await request.GetResponseAsync() as HttpWebResponse)
{
return(ProcessResponse(word, (int)response.StatusCode));
}
}
catch (WebException ex) //404 throws
{
var response = (HttpWebResponse)ex.Response;
if (response == null)
{
throw (ex); //if something else went wrong
}
return(ProcessResponse(word, (int)response.StatusCode));
}
catch (Exception ex)
{
throw (ex); // throw real exceptions
}
}
private bool EvalStatus(int status) => status >= 200 && status < 300; //anything in the 200 range is good
private bool ProcessResponse(string word, int status)
{
WordCache.Add(word, EvalStatus(status)); //cache new words
return(EvalStatus(status)); //anything in the 200 range is good
}