/// <summary>
/// Begins processing an entity.
/// </summary>
/// <param name = "parent">The parent of this entity.</param>
/// <param name = "baseUri">The base Uri for processing this entity within.</param>
public void Open(Entity parent, Uri baseUri)
{
this.m_parent = parent;
if (parent != null)
{
this.m_isHtml = parent.IsHtml;
}
this.m_line = 1;
if (this.m_isInternal)
{
if (this.m_literal != null)
{
this.m_stm = new StringReader(this.m_literal);
}
}
else if (this.m_uri == null)
{
this.Error("Unresolvable entity '{0}'", this.m_name);
}
else
{
if (baseUri != null)
{
this.m_resolvedUri = new Uri(baseUri, this.m_uri);
}
else
{
this.m_resolvedUri = new Uri(this.m_uri);
}
Stream stream = null;
Encoding e = Encoding.Default;
switch (this.m_resolvedUri.Scheme)
{
case "file":
{
string path = this.m_resolvedUri.LocalPath;
stream = new FileStream(path, FileMode.Open, FileAccess.Read);
}
break;
default:
//Console.WriteLine("Fetching:" + ResolvedUri.AbsoluteUri);
HttpWebRequest wr = (HttpWebRequest) WebRequest.Create(this.ResolvedUri);
wr.UserAgent = "Mozilla/4.0 (compatible;);";
wr.Timeout = 10000; // in case this is running in an ASPX page.
if (this.m_proxy != null)
{
wr.Proxy = new WebProxy(this.m_proxy);
}
wr.PreAuthenticate = false;
// Pass the credentials of the process.
wr.Credentials = CredentialCache.DefaultCredentials;
WebResponse resp = wr.GetResponse();
Uri actual = resp.ResponseUri;
if (!string.Equals(actual.AbsoluteUri, this.m_resolvedUri.AbsoluteUri, StringComparison.OrdinalIgnoreCase))
{
this.m_resolvedUri = actual;
}
string contentType = resp.ContentType.ToLowerInvariant();
string mimeType = contentType;
int i = contentType.IndexOf(';');
if (i >= 0)
{
mimeType = contentType.Substring(0, i);
}
if (StringUtilities.EqualsIgnoreCase(mimeType, "text/html"))
{
this.m_isHtml = true;
}
i = contentType.IndexOf("charset");
e = Encoding.Default;
if (i >= 0)
{
int j = contentType.IndexOf("=", i);
int k = contentType.IndexOf(";", j);
if (k < 0)
{
k = contentType.Length;
}
if (j > 0)
{
j++;
string charset = contentType.Substring(j, k - j).Trim();
try
{
e = Encoding.GetEncoding(charset);
}
catch (ArgumentException) {}
}
}
stream = resp.GetResponseStream();
break;
}
this.m_weOwnTheStream = true;
HtmlStream html = new HtmlStream(stream, e);
this.m_encoding = html.Encoding;
this.m_stm = html;
}
}
