/// <summary> Opens a connection using the given url.
/// </summary>
/// <param name="url">The url to open.
/// </param>
/// <param name="feedback">The object to use for messages or <code>null</code>.
/// </param>
/// <exception cref="">ParserException if an I/O exception occurs accessing the url.
///
/// </exception>
public static WebRequest OpenConnection(System.Uri url, ParserFeedback feedback)
{
WebRequest ret;
try
{
ret = (WebRequest)WebRequest.Create(url);
}
catch (System.IO.IOException ioe)
{
string msg = "HTMLParser.OpenConnection() : Error in opening a connection to " + url.ToString();
ParserException ex = new ParserException(msg, ioe);
if (null != feedback)
{
feedback.Error(msg, ex);
}
throw ex;
}
return(ret);
}
/// <summary> Opens a connection based on a given string.
/// The string is either a file, in which case <code>file://localhost</code>
/// is prepended to a canonical path derived from the string, or a url that
/// begins with one of the known protocol strings, i.e. <code>http://</code>.
/// Embedded spaces are silently converted to %20 sequences.
/// </summary>
/// <param name="resource">The name of a file or a url.
/// </param>
/// <param name="feedback">The object to use for messages or <code>null</code> for no feedback.
/// </param>
/// <exception cref=""> ParserException if the string is not a valid url or file.
///
/// </exception>
public static WebRequest OpenConnection(string resource, ParserFeedback feedback)
{
System.Uri url;
WebRequest ret;
try
{
url = SupportClass.CreateUri(LinkProcessor.FixSpaces(resource));
ret = ParserHelper.OpenConnection(url, feedback);
}
catch (System.UriFormatException ufe)
{
string msg = "HTMLParser.OpenConnection() : Error in opening a connection to " + resource;
ParserException ex = new ParserException(msg, ufe);
if (null != feedback)
{
feedback.Error(msg, ex);
}
throw ex;
}
return(ret);
}