public async Task <IActionResult> CreateURL([FromBody] CreateURLRequest request)
{
try
{
string normalizedLongUrl = URLNormalizer.Normalize(request.URL);
if (!string.IsNullOrEmpty(request.CustomPath))
{
if (!Uri.IsWellFormedUriString(request.CustomPath, UriKind.Relative))
{
return(BadRequest("Invalid custom URL"));
}
var custom = await Context.URLs.FindAsync(request.CustomPath);
if (custom != null || Reserved.Contains(request.CustomPath.ToLower()))
{
return(BadRequest("URL identifier already exists"));
}
else
{
var newCustomUrl = await AddURLToDatabase(request.CustomPath, normalizedLongUrl);
return(CreatedAtAction(nameof(CreateURL), newCustomUrl));
}
}
var existingUrl = await Context.URLs.FirstOrDefaultAsync(x => x.LongURL == normalizedLongUrl);
if (existingUrl != null)
{
return(Ok(existingUrl));
}
var random = new Random();
string shortUrlId;
do
{
var randomId = random.Next();
shortUrlId = URLShortener.Encode(randomId);
} while (await Context.URLs.FindAsync(shortUrlId) != null);
var newUrl = await AddURLToDatabase(shortUrlId, normalizedLongUrl);
return(CreatedAtAction(nameof(CreateURL), newUrl));
}
catch (Exception ex)
{
return(BadRequest(ex.Message));
}
}
public string ShouldCorrectlyNormalizeURL(string url)
{
return(URLNormalizer.Normalize(url));
}
public void ShouldFailOnInvalidURL(string url)
{
Action normalize = () => URLNormalizer.Normalize(url);
normalize.Should().Throw <Exception>();
}