// working with only sweetwater.com for now
private PriceListing AssembleListingFromData(string url, string htmlData)
{
string titlePattern = @"<title>(.*?)</title>";
string pricePattern = @"<meta itemprop=""price"" content=\""(\d+).(\d+)\"" />";
var title = Regex.Match(htmlData, titlePattern).ToString();
var price = Regex.Match(htmlData, pricePattern).ToString();
if (string.IsNullOrEmpty(title))
{
throw new System.Exception("Title not found");
}
if (string.IsNullOrEmpty(price))
{
throw new System.Exception("Price not found");
}
title = title.Substring(title.IndexOf('>') + 1);
title = title.Substring(0, title.IndexOf('<'));
price = Regex.Match(price, @"(\d+).(\d+)").ToString();
PriceListing pl = new PriceListing();
pl.Url = url;
pl.ItemTitle = title;
pl.ItemPrice = price;
return(pl);
}
public async Task <IActionResult> PutPriceListing(long id, PriceListing priceListing)
{
if (id != priceListing.Id)
{
return(BadRequest());
}
var priceListingDb = await _context.PriceListings.FindAsync(id);
if (priceListingDb == null)
{
return(NotFound());
}
priceListingDb.Url = priceListing.Url;
priceListingDb.ItemPrice = priceListing.ItemPrice;
try
{
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException) when(!PriceListingExists(id))
{
return(NotFound());
}
return(NoContent());
}
public async Task <ActionResult <PriceListing> > PostPriceListing(PriceListing priceListing)
{
string htmlData = null;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(priceListing.Url);
request.UserAgent = @"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.106 Safari/537.36";
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
if (response.StatusCode == HttpStatusCode.OK)
{
Stream recieveStream = response.GetResponseStream();
StreamReader readStream = null;
if (string.IsNullOrWhiteSpace(response.CharacterSet))
{
readStream = new StreamReader(recieveStream);
}
else
{
readStream = new StreamReader(recieveStream, Encoding.GetEncoding(response.CharacterSet));
}
htmlData = readStream.ReadToEnd();
response.Close();
readStream.Close();
}
if (string.IsNullOrWhiteSpace(htmlData))
{
throw new System.Exception("Error: Could not connect to web page");
}
PriceListing pl = AssembleListingFromData(priceListing.Url, htmlData);
_context.PriceListings.Add(pl);
await _context.SaveChangesAsync();
return(CreatedAtAction(nameof(GetPriceListing), new { id = pl.Id }, pl));
}
