// *** Public API ***
public AgentDocument PerformAction(AgentSession session, AgentAction action)
{
return(PerformAction(session, action, 0));
}
public AgentDocument PerformAction(AgentSession session, AgentAction action, int timeout)
{
AgentDocument document = null;
// these resources must be released if any exceptions occur
HttpWebRequest actionRequest = null;
StreamWriter paramWriter = null;
HttpWebResponse actionResponse = null;
Stream responseStream = null;
try
{
// set up the request and its headers
actionRequest = (HttpWebRequest)WebRequest.Create(new Uri(action.WebURL));
if (action.Referer != null && action.Referer.Length > 0)
{
actionRequest.Referer = action.Referer;
}
if (action.IsPost)
{
actionRequest.Method = "POST";
}
else
{
actionRequest.Method = "GET";
}
actionRequest.ContentType = "application/x-www-form-urlencoded";
actionRequest.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1";
actionRequest.Accept = "text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,video/x-mng,image/png,image/jpeg,image/gif;q=0.2,*/*;q=0.1";
actionRequest.AllowAutoRedirect = action.AllowRedirect;
actionRequest.KeepAlive = false; // true;
if (timeout > 0)
{
actionRequest.Timeout = timeout;
}
actionRequest.Headers.Add("Accept-Language", "en-us,en;q=0.5");
actionRequest.ProtocolVersion = new Version(action.Version);
actionRequest.CookieContainer = session.Cookies;
if (action.IsPost)
{
string content = "";
foreach (string key in action.ElementKeyOrder)
{
string requestValue = HttpUtility.UrlEncode((string)action.Elements[key]);
content += key + "=" + requestValue + "&";
}
if (content.Length > 0)
{
content = content.Substring(0, content.Length - 1);
}
paramWriter = new StreamWriter(actionRequest.GetRequestStream());
paramWriter.Write(content);
paramWriter.Flush();
paramWriter.Close();
}
document = new AgentDocument();
actionResponse = (HttpWebResponse)actionRequest.GetResponse();
document.RedirectUri = actionResponse.GetResponseHeader("Location");
responseStream = actionResponse.GetResponseStream();
StringWriter responseBuilder = new StringWriter();
// now this looks less efficient than using a StreamReader (and it probably is), but at least this
// doesn't result in huge memory leaks. the stream reader class bears investiation!
byte[] buffer = new byte[1024];
int n;
try
{
do
{
n = responseStream.Read(buffer, 0, buffer.Length);
char[] charBuffer = new char[buffer.Length];
for (int i = 0; i < buffer.Length; i++)
{
charBuffer[i] = (char)buffer[i];
}
responseBuilder.Write(charBuffer, 0, n);
} while (n > 0);
}
catch (Exception ex)
{
Logger.Instance.Error(action.WebURL, ex);
}
document.ResponseString = responseBuilder.GetStringBuilder().ToString();
responseBuilder.Close();
// new logging thing
if (DoLogging)
{
Logger.Instance.Debug("In: " + action + "\n-------\nOut: " + document);
}
document.Uri = actionResponse.ResponseUri.ToString();
}
catch (Exception ex)
{
if (DoLogging)
{
Logger.Instance.Error("In: " + action + "\n-------\nOut: " + document, ex);
}
throw ex;
}
finally
{
try
{
if (paramWriter != null)
{
paramWriter.Close();
}
}
catch
{
}
try
{
if (responseStream != null)
{
responseStream.Close();
}
}
catch
{
}
try
{
if (actionResponse != null)
{
actionResponse.Close();
}
}
catch
{
}
}
return(document);
}
