public void AddEntry(Entry entry)
{
if (entry == null)
throw new ArgumentNullException("entry");
_entries.Add(entry);
}
internal void AddEntry(Entry entry)
{
if (entry == null)
throw new ArgumentNullException("entry");
if (entry.Type != EntryType.Comment && entry.Type != EntryType.UserAgent)
throw new ArgumentException("Only Comments and User-Agent entries can be added", "entry");
_entries.Add(entry);
}
public static bool TryParse(Uri baseUri, string entryText, out Entry entry)
{
if (baseUri == null)
throw new ArgumentNullException("baseUri");
entry = null;
if (string.IsNullOrEmpty(entryText))
return false;
EntryType type = EntryType.Invalid;
string comment = string.Empty;
int commentPosition = entryText.IndexOf('#');
if (commentPosition == 0)
{
type = EntryType.Comment;
}
if (commentPosition >= 0 &&
(commentPosition == 0 || entryText[commentPosition - 1] == ' '))
{
comment = entryText.Substring(commentPosition + 1);
entryText = entryText.Substring(0, commentPosition);
}
if (string.IsNullOrEmpty(entryText))
{
entry = CreateEntry(type);
entry.Comment = comment;
return true;
}
try
{
if (entryText.StartsWith(USER_AGENT_KEYWORD, true, CultureInfo.InvariantCulture))
{
type = EntryType.UserAgent;
entry = CreateEntry(type);
entry.Comment = comment;
string userAgent = entryText.Substring(USER_AGENT_KEYWORD.Length).Trim().TrimEnd('?');;
if(userAgent == null || string.IsNullOrEmpty(userAgent.Trim()))
{
entry = null;
return false;
}
else
{
((UserAgentEntry) entry).UserAgent = userAgent;
}
}
else if (entryText.StartsWith(DISALLOW_KEYWORD, true, CultureInfo.InvariantCulture))
{
type = EntryType.Disallow;
bool inverted = entryText.EndsWith("$");
string value = entryText.Substring(DISALLOW_KEYWORD.Length).Trim().TrimEnd('?');
Uri url = null;
if (!string.IsNullOrEmpty(value) && Uri.TryCreate(baseUri, value, out url))
{
entry = CreateEntry(type);
entry.Comment = comment;
((UrlEntry)entry).Url = url;
((UrlEntry)entry).Inverted = inverted;
}
}
else if (entryText.StartsWith(ALLOW_KEYWORD, true, CultureInfo.InvariantCulture))
{
type = EntryType.Allow;
bool inverted = entryText.EndsWith("$");
string value = entryText.Substring(ALLOW_KEYWORD.Length).Trim().TrimEnd('?');
Uri url;
if (Uri.TryCreate(baseUri, value, out url))
{
entry = CreateEntry(type);
entry.Comment = comment;
((UrlEntry)entry).Url = url;
((UrlEntry)entry).Inverted = inverted;
}
}
else if (entryText.StartsWith(CRAWL_DELAY_KEYWORD, true, CultureInfo.InvariantCulture))
{
type = EntryType.CrawlDelay;
string value = entryText.Substring(CRAWL_DELAY_KEYWORD.Length).Trim().TrimEnd('?');
entry = CreateEntry(type);
entry.Comment = comment;
try
{
((CrawlDelayEntry)entry).CrawlDelay = Convert.ToInt32(value);
}
catch
{
((CrawlDelayEntry)entry).CrawlDelay = 0;
}
}
else if (entryText.StartsWith(SITEMAP_KEYWORD, true, CultureInfo.InvariantCulture))
{
type = EntryType.Sitemap;
string value = entryText.Substring(SITEMAP_KEYWORD.Length).Trim().TrimEnd('?');
entry = CreateEntry(type);
entry.Comment = comment;
try
{
((SitemapEntry)entry).SitemapUrl = value;
}
catch
{
((SitemapEntry)entry).SitemapUrl = "";
}
}
else
{
entry = null;
return false;
}
}
catch (Exception ex)
{
entry = null;
return false;
}
if (entry == null)
return false;
return true;
}
public static bool TryParse(Uri baseUri, string entryText, out Entry entry)
{
if (baseUri == null)
{
throw new ArgumentNullException("baseUri");
}
entry = null;
if (string.IsNullOrEmpty(entryText))
{
return(false);
}
EntryType type = EntryType.Invalid;
string comment = string.Empty;
int commentPosition = entryText.IndexOf('#');
if (commentPosition == 0)
{
type = EntryType.Comment;
}
if (commentPosition >= 0 &&
(commentPosition == 0 || entryText[commentPosition - 1] == ' '))
{
comment = entryText.Substring(commentPosition + 1);
entryText = entryText.Substring(0, commentPosition);
}
if (string.IsNullOrEmpty(entryText))
{
entry = CreateEntry(type);
entry.Comment = comment;
return(true);
}
try
{
if (entryText.StartsWith(USER_AGENT_KEYWORD, StringComparison.OrdinalIgnoreCase))
{
type = EntryType.UserAgent;
entry = CreateEntry(type);
entry.Comment = comment;
string userAgent = entryText.Substring(USER_AGENT_KEYWORD.Length).Trim().TrimEnd('?');
if (userAgent == null || string.IsNullOrEmpty(userAgent.Trim()))
{
entry = null;
return(false);
}
else
{
((UserAgentEntry)entry).UserAgent = userAgent;
}
}
else if (entryText.StartsWith(DISALLOW_KEYWORD, StringComparison.OrdinalIgnoreCase))
{
type = EntryType.Disallow;
bool inverted = entryText.EndsWith("$");
string value = entryText.Substring(DISALLOW_KEYWORD.Length).Trim();
Uri url = null;
if (!string.IsNullOrEmpty(value) && Uri.TryCreate(baseUri, value, out url))
{
entry = CreateEntry(type);
entry.Comment = comment;
((UrlEntry)entry).Url = url;
((UrlEntry)entry).Inverted = inverted;
}
}
else if (entryText.StartsWith(ALLOW_KEYWORD, StringComparison.OrdinalIgnoreCase))
{
type = EntryType.Allow;
bool inverted = entryText.EndsWith("$");
string value = entryText.Substring(ALLOW_KEYWORD.Length).Trim().TrimEnd('?');
Uri url;
if (Uri.TryCreate(baseUri, value, out url))
{
entry = CreateEntry(type);
entry.Comment = comment;
((UrlEntry)entry).Url = url;
((UrlEntry)entry).Inverted = inverted;
}
}
else if (entryText.StartsWith(CRAWL_DELAY_KEYWORD, StringComparison.OrdinalIgnoreCase))
{
type = EntryType.CrawlDelay;
string value = entryText.Substring(CRAWL_DELAY_KEYWORD.Length).Trim().TrimEnd('?');
entry = CreateEntry(type);
entry.Comment = comment;
try
{
((CrawlDelayEntry)entry).CrawlDelay = Convert.ToInt32(value);
}
catch
{
((CrawlDelayEntry)entry).CrawlDelay = 0;
}
}
else if (entryText.StartsWith(SITEMAP_KEYWORD, StringComparison.OrdinalIgnoreCase))
{
type = EntryType.Sitemap;
string value = entryText.Substring(SITEMAP_KEYWORD.Length).Trim().TrimEnd('?');
entry = CreateEntry(type);
entry.Comment = comment;
try
{
((SitemapEntry)entry).SitemapUrl = value;
}
catch
{
((SitemapEntry)entry).SitemapUrl = "";
}
}
else
{
entry = null;
return(false);
}
}
catch (Exception)
{
entry = null;
return(false);
}
if (entry == null)
{
return(false);
}
return(true);
}
