/// <summary>
/// Removes URL attribute in css urls like this: url(other.css) will change to "other.css"
/// </summary>
public static bool RemoveUrlAttribCssLocation(string text, out string result)
{
result = text;
const string urlAttrib = "url(";
const string urlEnd = ")";
// start attrib
int start = StringCompare.IndexOfIgnoreCase(ref text, urlAttrib);
if (start == -1)
{
return(false);
}
text = text.Remove(start, urlAttrib.Length);
// end attrib
start = StringCompare.IndexOfMatchCase(ref text, urlEnd);
if (start == -1)
{
return(false);
}
text = text.Remove(start, urlEnd.Length);
result = text;
return(true);
}
/// <summary>
/// Checks if specified url is ftp or not
/// </summary>
public static bool IsFTPUrl(string url)
{
if (StringCompare.StartsWithIgnoreCase(ref url, "ftp://"))
{
return(true);
}
return(false);
}
/// <summary>
/// Checks if specified url is javascript code or not
/// </summary>
public static bool IsJavascriptUrl(string path)
{
if (StringCompare.StartsWithMatchCase(ref path, "javascript:"))
{
return(true);
}
return(false);
}
public static string GetContentType(ref string html, string defaultValue)
{
string result = defaultValue;
int end, tmp, start = StringCompare.IndexOfIgnoreCase(ref html, "<meta");
if (start == -1)
{
return(result);
}
tmp = StringCompare.IndexOfIgnoreCase(ref html, "http-equiv=\"content-type\"", start);
if (tmp == -1)
{
tmp = StringCompare.IndexOfIgnoreCase(ref html, "http-equiv='content-type'", start);
if (tmp == -1)
{
tmp = StringCompare.IndexOfIgnoreCase(ref html, "http-equiv=content-type", start);
if (tmp == -1)
{
tmp = StringCompare.IndexOfIgnoreCase(ref html, "http-equiv= content-type", start);
if (tmp == -1)
{
return(result);
}
}
}
}
start = tmp;
start = StringCompare.IndexOfIgnoreCase(ref html, "charset", start);
if (start == -1)
{
return(result);
}
start = StringCompare.IndexOfIgnoreCase(ref html, "=", start);
if (start == -1)
{
return(result);
}
start++;
end = StringCompare.IndexOfIgnoreCase(ref html, "\"", start);
if (end == -1)
{
return(result);
}
tmp = StringCompare.IndexOfIgnoreCase(ref html, "\'", start);
if (tmp > start && end > tmp)
{
end = tmp;
}
result = html.Substring(start, end - start);
result = result.Trim();
return(result);
}
/// <summary>
/// Checks if the specified url is virtual
/// </summary>
public static bool IsVirtualUrl(string path)
{
path = path.ToLower();
for (int i = 0; i < _NonVirtualUrls.Length; i++)
{
// MatchCase test is faster
if (StringCompare.StartsWithMatchCase(ref path, _NonVirtualUrls[i]))
{
return(false);
}
}
return(true);
}
/// <summary>
/// Finds and returns DOCTYPE definition.
/// </summary>
public static string GetDocType(ref string html)
{
const string startTag = "<!DOCTYPE";
const string endTag = ">";
int start, end;
string result = "";
start = StringCompare.IndexOfIgnoreCase(ref html, startTag);
if (start == -1)
{
return(result);
}
end = StringCompare.IndexOfIgnoreCase(ref html, endTag, start);
if (end == -1)
{
return(result);
}
// add a character length to position
end++;
// Test start tag
if (start > 0)
{
// DocType should be first tag in html document
string temp = html.Substring(0, start).Trim();
if (temp.Length > 0 && temp.IndexOf('<') != -1)
{
return(result);
}
}
// substring
result = html.Substring(start, end - start);
return(result);
}
/// <summary>
/// Specifies that a string with specified position index, is enclosed by some tags
/// </summary>
public static bool IsEnclosedBy(ref string htmlCode, int index, string startTag, string endTag)
{
int start = StringCompare.LastIndexOfIgnoreCase(ref htmlCode, startTag, index);
if (start == -1)
{
return(false);
}
int end = StringCompare.IndexOfIgnoreCase(ref htmlCode, endTag, start);
if (end == -1)
{
return(true);
}
if (end > index)
{
return(true);
}
return(false);
}
/// <summary>
/// Removes escaped characters from start and end of phrase
/// </summary>
public static string RemoveEscapeQuotesFromTagAttributeValue(string value)
{
value = value.Trim();
if (value.Length > 0)
{
// if the text started with escaped characters.
//if (value.StartsWith("\\'") || value.StartsWith(@"\"""))
if (StringCompare.StartsWithMatchCase(ref value, "\\'") ||
StringCompare.StartsWithMatchCase(ref value, @"\"""))
{
// remove
value = value.Remove(0, 2);
// End of text will be checked only if begging of it oncludes escaped characters
if (value.Length > 0)
{
// if the text ends with ( \ ) character only,
// it seems there is a problem so we will prevent it by adding another ( \ ) at the end of text.
if (StringCompare.EndsWithMatchCase(ref value, "\\"))
{
value = value.Remove(value.Length - 1, 1) + " \\";
}
else if (StringCompare.EndsWithMatchCase(ref value, "\\'") ||
StringCompare.EndsWithMatchCase(ref value, @"\"""))
{
value = value.Remove(value.Length - 1, 1);
}
//if (value.EndsWith("\\"))
// value = value.Remove(value.Length - 1, 1) + " \\";
//else if (value.EndsWith("\\'") || value.EndsWith(@"\"""))
// value = value.Remove(value.Length - 1, 1);
}
}
}
return(value);
}
public static bool IsFramesetHtml(ref string html)
{
return(StringCompare.IndexOfIgnoreCase(ref html, "<frameset", 0) != -1);
}
