/// <summary>
/// Converts to tag.
/// </summary>
/// <param name="html">The HTML.</param>
/// <param name="lowerNames">if set to <c>true</c> [lower names].</param>
/// <returns></returns>
public static ScreenScraperTag ConvertToTag(string html, bool lowerNames)
{
Match m = tagRegex.Match(html);
if (m.Success)
{
ScreenScraperTag tag = new ScreenScraperTag();
tag.Name = m.Groups[1].ToString();
foreach (Capture capture in m.Groups[2].Captures)
{
Match m2 = nameValueRegex.Match(capture.ToString());
if (m2.Success)
{
string id = m2.Groups[1].ToString();
if (lowerNames)
{
id = id.ToLower();
}
try
{
tag.Attributes[id] = m2.Groups[2].ToString();
}
catch (Exception)
{
// Catch if duplicate attributes are added
}
}
}
return(tag);
}
return(null);
}
/// <summary>
/// Converts to tag list.
/// </summary>
/// <param name="tags">The tags.</param>
/// <param name="lowerNames">if set to <c>true</c> [lower names].</param>
/// <returns></returns>
public static IList <ScreenScraperTag> ConvertToTagList(IList <string> tags, bool lowerNames)
{
IList <ScreenScraperTag> ret = new List <ScreenScraperTag>();
foreach (string tag in tags)
{
ScreenScraperTag t = ConvertToTag(tag, lowerNames);
if (t != null)
{
ret.Add(t);
}
}
return(ret);
}
/// <summary>
/// Posts the process data.
/// </summary>
/// <param name="page">The page.</param>
/// <returns></returns>
private ScrapedPage PostProcessData(ScrapedPage page)
{
if (FollowEquivRefreshes)
{
bool followed = false;
// See if we can find an http-equiv refresh
IList <ScreenScraperTag> metaTags = ScrapedPage.ConvertToTagList(page.FindChildlessTags("meta", false), true);
// Now, we have all META tags. Try to find one with HTTP-EQUIV="refresh"
ScreenScraperTag refreshTag = null;
foreach (ScreenScraperTag metaTag in metaTags)
{
string httpEquivValue = metaTag.FindAttributeValue("http-equiv");
if (httpEquivValue != null && httpEquivValue.Equals("refresh"))
{
refreshTag = metaTag;
break;
}
}
if (refreshTag != null)
{
// It's a refresh. Try to figure out the URL we have to go to.
string contentValue = refreshTag.FindAttributeValue("content");
if (contentValue != null)
{
// First, split it by semicolon
string[] refreshPieces = contentValue.Split(';');
string url = null;
int time = 0;
foreach (string refreshPiece in refreshPieces)
{
if (refreshPiece.ToLower().Trim().StartsWith("url"))
{
// found the URL. Just take everything after the =
int equalPos = refreshPiece.IndexOf('=');
if (equalPos != -1)
{
url = refreshPiece.Substring(equalPos + 1).Trim();
break;
}
}
else if (time == 0)
{
int.TryParse(refreshPiece.Trim(), out time);
}
}
if (time == 0 && url != null)
{
// We have a refresh url, so we need to update the page
// If it is a relative url, make it absolute.
if (!Uri.IsWellFormedUriString(url, UriKind.Absolute))
{
url = LastProcessResponseUri.GetLeftPart(UriPartial.Authority) + "/" + (url.StartsWith("/") ? url.Substring(1) : url);
}
if (!url.Equals(LastMetaFollow))
{
page = Scrape(MetaRefreshScrapeType == null ? page.ScrapeType : MetaRefreshScrapeType.Value, url, page.QueryParameters);
LastMetaFollow = url;
followed = true;
}
else
{
throw new Exception("Appears to be a recursive loop of http-equiv redirects to the same page ('" + url + "').");
}
}
}
}
if (!followed)
{
LastMetaFollow = null;
}
}
return(page);
}
