public async Task <ActionResult> CreateUrlItemAsync(UrlItemCreateDto createDto)
{
// Generate an alphanumerical slug
if (string.IsNullOrEmpty(createDto.Slug))
{
string slug;
do
{
slug = RandomHelper.NextAlphanumeric(_slugConfiguration.Length);
} while (await _context.UrlItems.AnyAsync(u => u.Slug == slug));
createDto.Slug = slug;
}
// Check for duplicates
else if (await _context.UrlItems.AnyAsync(u => u.Slug == createDto.Slug))
{
ModelState.AddModelError("Slug", "The slug must be unique");
return(CommonResponse.CreateResponse(modelState: ModelState));
}
var urlItem = _mapper.Map <UrlItem>(createDto);
_context.UrlItems.Add(urlItem);
await _context.SaveChangesAsync();
var viewDto = _mapper.Map <UrlItemViewDto>(urlItem);
_logger.LogInformation("{method}: {shortUrl} -> {redirectUrl}, {time} UTC", nameof(CreateUrlItemAsync), viewDto.ShortUrl, viewDto.RedirectUrl, DateTime.UtcNow);
return(CommonResponse.CreateResponse(data: viewDto));
}
public async Task <ActionResult> GetAsync(string slug)
{
var url = await _context.UrlItems.SingleOrDefaultAsync(u => u.Slug == slug);
if (url == null)
{
ModelState.AddModelError("slug", $"Could not find ${slug}");
return(CommonResponse.CreateResponse(modelState: ModelState, status: 404));
}
return(CommonResponse.CreateResponse(data: _mapper.Map <AnalyticsViewDto>(url)));
}
public async Task <ActionResult> RedirectFromShortUrlAsync(string slug)
{
var urlItem = await _context.UrlItems.SingleOrDefaultAsync(u => u.Slug == slug);
if (urlItem == null)
{
ModelState.AddModelError("slug", $"Could not find ${slug}");
return(CommonResponse.CreateResponse(modelState: ModelState, status: 404));
}
urlItem.Clicks++;
await _context.SaveChangesAsync();
_logger.LogInformation("{method}: {shortUrl} -> {redirectUrl}, {time} UTC", nameof(RedirectFromShortUrlAsync), Request.GetEncodedUrl(), urlItem.RedirectUrl, DateTime.UtcNow);
return(Redirect(urlItem.RedirectUrl));
}
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddDbContext <UrlShrtDbContext>(option => option.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));
services.AddAutoMapper(typeof(Startup));
services.AddControllers();
services.TryAddSingleton <IHttpContextAccessor, HttpContextAccessor>();
services.TryAddScoped <ISlugConfiguration, SlugConfiguration>();
services.AddCors();
services.Configure <ApiBehaviorOptions>(options =>
{
options.InvalidModelStateResponseFactory = context =>
{
return(CommonResponse.CreateResponse(modelState: context.ModelState, status: (int)HttpStatusCode.BadRequest));
};
});
services.Configure <ForwardedHeadersOptions>(options =>
{
options.ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto;
});
}