public async Task <IActionResult> OnGetAsync(long?id)
{
if (id == null)
{
return(NotFound());
}
Urlshortener = await _context.Urlshortener.FirstOrDefaultAsync(m => m.AutoId == id);
if (Urlshortener == null)
{
return(NotFound());
}
return(Page());
}
public async Task <IActionResult> OnPostAsync(long?id)
{
if (id == null)
{
return(NotFound());
}
Urlshortener = await _context.Urlshortener.FindAsync(id);
if (Urlshortener != null)
{
_context.Urlshortener.Remove(Urlshortener);
await _context.SaveChangesAsync();
}
return(RedirectToPage("./Index"));
}
public async Task <ActionResult <Urlshortener> > RefreshToken(long id)
{
const string splittor = @"://";
//
Urlshortener shortener = await _context.Urlshortener.FirstOrDefaultAsync <Urlshortener>(u => u.AutoId == id);
if (shortener != null)
{
//
string newToken = GenerateToken();
while (_context.Urlshortener.FirstOrDefault <Urlshortener>(u => u.Token.Equals(newToken)) != null)
{
newToken = GenerateToken();
}
//
shortener.Token = newToken;
//
shortener.ShortUrl = shortener.Url.Split(splittor)[0] + splittor + shortener.Token;
_context.Attach(shortener).State = EntityState.Modified;
try
{
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
return(new JsonResult("500 Internal Server Error."));
}
return(Redirect("/Urlshorteners/Edit/?id=" + id));
}
else
{
return(NotFound());
}
}
public async Task <ActionResult <Urlshortener> > UrlRedirect([FromRoute] string token)
{
Urlshortener shortener = await _context.Urlshortener.FirstOrDefaultAsync <Urlshortener>(u => u.Token.Equals(token));
if (shortener != null)
{
if (shortener.ExpiredDateTime == null || shortener.ExpiredDateTime > DateTime.Now)
{
//
if (shortener.Clicked == null)
{
shortener.Clicked = 0;
}
//
shortener.Clicked += 1;
_context.Attach(shortener).State = EntityState.Modified;
try
{
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
return(new JsonResult("500 Internal Server Error."));
}
return(Redirect(shortener.Url));
}
else
{
return(new JsonResult(token + " has expired."));
}
}
else
{
return(NotFound());
}
}
public async Task <ActionResult <Urlshortener> > PostUrlshortener(Urlshortener urlshortener)
{
const string splittor = @"://";
//
string newToken = GenerateToken();
while (_context.Urlshortener.FirstOrDefault <Urlshortener>(u => u.Token.Equals(newToken)) != null)
{
newToken = GenerateToken();
}
//
Urlshortener newItem = new Urlshortener();
newItem.Url = urlshortener.Url;
newItem.CreatedTimeStamp = DateTime.Now;
newItem.ExpiredDateTime = urlshortener.ExpiredDateTime;
newItem.Token = newToken;
//
int i = urlshortener.Url.IndexOf(splittor);
if (i == -1)
{
newItem.Url = @"http://" + newItem.Url;
}
newItem.ShortUrl = newItem.Url.Split(splittor)[0] + splittor + newItem.Token;
//
_context.Urlshortener.Add(newItem);
await _context.SaveChangesAsync();
return(CreatedAtAction("GetUrlshortener", new { id = newItem.AutoId }, newItem));
}
