public async Task <IActionResult> CreateHashIDPostedJson([FromBody] Models.UrlString longUrl)
{
if (ModelState.IsValid && URLValidator.IsUrlValid(longUrl.url))
{
Models.ShortLink hashIDItem = await HashIDDBRepository.CreateHashIDItemIfNotExistsAsync(longUrl.url);
Models.PublicShortLink response = new Models.PublicShortLink
{
Url = hashIDItem.Url,
HashID = hashIDItem.HashID,
CreatedTime = hashIDItem.CreatedTime
};
// Determine if hashID exists in cache.
// Move hashID to front if hashID exists in cache.
if (ReadUrlCache.Get(response.HashID) == null)
{
// Add new hashID to cache.
ReadUrlCache.Add(response.HashID, response.Url);
}
return(Ok(response));
}
else
{
Models.ErrorResponse invalidURLResponse = new Models.ErrorResponse
{
Details = "Enter a valid URL."
};
return(BadRequest(invalidURLResponse));
}
}
public async Task <IActionResult> Get(string hashID)
{
string redirectUrl = ReadUrlCache.Get(hashID);
if (redirectUrl != null)
{
return(Redirect(redirectUrl));
}
Models.ShortLink hashIDItem = await HashIDDBRepository.GetHashIDItemAsync(hashID);
if (hashIDItem == null)
{
Models.ErrorResponse notFoundResponse = new Models.ErrorResponse
{
Details = "Not found."
};
return(NotFound(notFoundResponse));
}
else
{
return(Redirect(hashIDItem.Url));
}
}