/// <summary>
///
/// </summary>
/// <param name="pageUri"></param>
/// <returns></returns>
public HttpProtocolOutput GetProtocolOutput(System.Uri pageUri)
{
this.m_ProtocolOutput = null;
HttpProtocolStatus obStatus = null;
System.String urlString = pageUri.ToString();
try
{
System.Uri url = new System.Uri(urlString);
int redirects = 0;
while (true)
{
if (!RobotRulesParser.IsAllowed(url))
{
if (HttpProtocol.HONOR_ROBOTSTEXT)
{
throw new RobotBlockedException(url);
}
}
System.Net.IPAddress addr = BlockAddr(url);
HttpResponseMgr response;
try
{
response = new HttpResponseMgr(urlString, url); // make a request
}
finally
{
UnblockAddr(addr);
}
int code = response.Code;
if (code == 200)
{
// got a good response
obStatus = HttpProtocolStatus.STATUS_SUCCESS;
m_ProtocolOutput = new HttpProtocolOutput(new HttpProtocolContent(response.Content, response.Headers), obStatus); // return it
m_ProtocolOutput.Cookies = response.Cookies;
m_ProtocolOutput.ProtocolVersion = response.ProtocolVersion;
return(m_ProtocolOutput);
}
else if (code == 410)
{
// page is gone
throw new ResourceGoneException(url, "Http: " + code);
}
else if (code >= 300 && code < 400)
{
// handle redirect
if (redirects == MAX_REDIRECTS)
{
throw new System.Web.HttpException("Too many redirects: " + urlString);
}
url = new System.Uri(url, response.GetHeader("Location"));
redirects++;
System.Diagnostics.Trace.WriteLine("redirect to " + url);
}
else
{
// convert to exception
throw new HttpError(code);
}
}
}
catch (RobotBlockedException ex)
{
System.Diagnostics.Trace.WriteLine(ex.Message);
m_ProtocolOutput = new HttpProtocolOutput(null, HttpProtocolStatus.STATUS_ROBOTS_DENIED);
}
catch (HttpError ex)
{
System.Diagnostics.Trace.WriteLine(ex.Message);
obStatus = new HttpProtocolStatus(ex.Code);
m_ProtocolOutput = new HttpProtocolOutput(null, obStatus);
}
catch (System.Exception e)
{
System.Diagnostics.Trace.WriteLine(e.Message);
m_ProtocolOutput = new HttpProtocolOutput(null, HttpProtocolStatus.STATUS_FAILED);
}
return(m_ProtocolOutput);
}
/// <summary>
///
/// </summary>
/// <param name="pageUri"></param>
/// <returns></returns>
public HttpProtocolOutput GetProtocolOutput(System.Uri pageUri)
{
this.m_ProtocolOutput = null;
HttpProtocolStatus obStatus = null;
System.String urlString = pageUri.ToString();
try
{
System.Uri url = new System.Uri(urlString);
int redirects = 0;
while(true)
{
if (!RobotRulesParser.IsAllowed(url))
{
if (HttpProtocol.HONOR_ROBOTSTEXT)
{
throw new RobotBlockedException(url);
}
}
System.Net.IPAddress addr = BlockAddr(url);
HttpResponseMgr response;
try
{
response = new HttpResponseMgr(urlString, url); // make a request
}
finally
{
UnblockAddr(addr);
}
int code = response.Code;
if (code == 200)
{
// got a good response
obStatus = HttpProtocolStatus.STATUS_SUCCESS;
m_ProtocolOutput = new HttpProtocolOutput(new HttpProtocolContent(response.Content, response.Headers),obStatus); // return it
m_ProtocolOutput.Cookies = response.Cookies;
m_ProtocolOutput.ProtocolVersion = response.ProtocolVersion;
return m_ProtocolOutput;
}
else if (code == 410)
{
// page is gone
throw new ResourceGoneException(url, "Http: " + code);
}
else if (code >= 300 && code < 400)
{
// handle redirect
if (redirects == MAX_REDIRECTS)
{
throw new System.Web.HttpException("Too many redirects: " + urlString);
}
url = new System.Uri(url, response.GetHeader("Location"));
redirects++;
System.Diagnostics.Trace.WriteLine("redirect to " + url);
}
else
{
// convert to exception
throw new HttpError(code);
}
}
}
catch(RobotBlockedException ex)
{
System.Diagnostics.Trace.WriteLine(ex.Message);
m_ProtocolOutput = new HttpProtocolOutput(null, HttpProtocolStatus.STATUS_ROBOTS_DENIED);
}
catch(HttpError ex)
{
System.Diagnostics.Trace.WriteLine(ex.Message);
obStatus = new HttpProtocolStatus(ex.Code);
m_ProtocolOutput = new HttpProtocolOutput(null, obStatus);
}
catch (System.Exception e)
{
System.Diagnostics.Trace.WriteLine(e.Message);
m_ProtocolOutput = new HttpProtocolOutput(null, HttpProtocolStatus.STATUS_FAILED);
}
return m_ProtocolOutput;
}
private void GetPageContent(HttpProtocol obProtocol, bool bIsRefresh)
{
if(m_bHasContent && !bIsRefresh)
{
return;
}
if(obProtocol == null)
{
throw new ArgumentNullException("obProtocol", "Null HttpProtocol object specified");
}
lock(this)
{
ParserStream stream = null;
System.String type = String.Empty;
System.String charset = String.Empty;
try
{
m_obProtocolOutput = obProtocol.GetProtocolOutput();
if (m_obProtocolOutput.Status.Code == HttpProtocolStatus.SUCCESS)
{
m_bHasContent = true;
this.m_HttpContentProperties = m_obProtocolOutput.Content.ContentProperties;
type = this.ContentType;
charset = GetCharset(type);
stream = new ParserStream(new System.IO.MemoryStream(m_obProtocolOutput.Content.ContentData));
}
if (null != stream)
{
mSource = new InputStreamSource(stream,charset,m_obProtocolOutput.Content.ContentData.Length);
}
}
catch (System.Exception e)
{
throw new ParserException("Failed to get page content", e);
}
mUrl = obProtocol.URL.ToString();
mIndex = new PageIndex(this);
}
}
