//清除当前全部请求
public void UF_Clear()
{
try
{
lock (m_ListAsyncRequestOpera)
{
m_ListAsyncRequestOpera.Clear();
}
lock (m_ListAsyncHandle)
{
// 中断所有进行中的请求
lock (m_ListAsyncHandle)
{
for (int k = 0; k < m_ListAsyncHandle.Count; k++)
{
AsyncRequestStruct ars = m_ListAsyncHandle[k];
try{ ars.request.Abort(); }
catch (System.Exception e) { Debugger.UF_Exception(e); }
}
m_ListAsyncHandle.Clear();
}
}
}
catch (System.Exception ex) {
Debugger.UF_Exception(ex);
}
}
/// <summary>
/// 异步请求
/// 注意回调函数可能在另外一个线程中执行，要避免线程引发的异常
/// 如果已经在执行AsynRequest 已经执行 或 BegineAsynRequest正在执行 ，该接口调用无效，将返回false
/// </summary>
public bool UF_AsynRequest(int stype, string url, string param, string headinfo, int timeOut, DelegateResponse callback)
{
HttpWebRequest request = null;
AsyncRequestStruct ars = new AsyncRequestStruct();
int uid = GID;
try{
ars.id = uid;
ars.stamp = System.Environment.TickCount;
ars.callback = callback;
lock (m_ListAsyncHandle){
m_ListAsyncHandle.Add(ars);
}
request = UF_CreateRequest(url, stype, param, headinfo, timeOut);
ars.request = request;
ars.request.Timeout = timeOut;
ars.request.BeginGetResponse(new AsyncCallback(UF_CallbackAsynRequest), ars);
return(true);
}
catch (Exception e) {
UF_RemoveAsyncHandle(uid);
if (request != null)
{
request.Abort();
}
Debugger.UF_Error("Http error<AsynRequest>:" + e.Message);
UF_InvokCallback(callback, WebRequestRetcode.EXCEPTION_ON_REQUEST, null);
}
return(false);
}
//轮训查询超时的HTTP请求，并主动ABORT
public void UF_Update()
{
if (m_ListAsyncRequestOpera.Count > 0)
{
lock (m_ListAsyncRequestOpera) {
AsyncRequestOpera opera = m_ListAsyncRequestOpera [0];
m_ListAsyncRequestOpera.RemoveAt(0);
UF_AsynRequest(opera.stype, opera.url, opera.param, opera.headinfo, opera.timeOut, opera.callback);
}
}
if (m_ListAsyncHandle.Count > 0)
{
lock (m_ListAsyncHandle){
for (int k = 0; k < m_ListAsyncHandle.Count; k++)
{
AsyncRequestStruct ars = m_ListAsyncHandle[k];
int timestamp = Math.Abs(System.Environment.TickCount - ars.stamp);
if (ars.request != null && ars.request.Timeout < timestamp)
{
Debugger.UF_Error(string.Format("Request TimeOut: Current:{0} Stamp: {1} ", System.Environment.TickCount, ars.stamp));
m_ListAsyncHandle.RemoveAt(k);
try{
ars.request.Abort();
}
catch (System.Exception e) {
Debugger.UF_Exception(e);
}
//回归主线程调用
UF_InvokCallback(ars.callback, WebRequestRetcode.TIME_OUT, null);
break;
}
}
}
}
}
public void FetchNextWhatchamacallit(string IP, IWebProxy proxy, DataAccessDataContext DataContext)
{
Queue <Listing> ListingQueue = ListingQueues[IP];
lock (KeyChain[IP])
{
if (ListingQueue.Count > 0)
{
HttpWebRequest hwr = (HttpWebRequest)WebRequest.Create("http://" + ListingQueue.Peek().CLCity.Name + ".craigslist.org/" + (ListingQueue.Peek().CLSubCity == null ? "" : (ListingQueue.Peek().CLSubCity.SubCity + "/")) + ListingQueue.Peek().CLSiteSection.Name + "/" + ListingQueue.Peek().Id.ToString() + ".html");
{
hwr.Proxy = proxy;
hwr.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
hwr.Headers.Add(HttpRequestHeader.AcceptEncoding, "gzip, deflate");
hwr.KeepAlive = false;
hwr.UserAgent = Properties.Settings.Default.UserAgent;
AsyncRequestStruct ars = new AsyncRequestStruct()
{
request = hwr, parameters = ListingQueue.Peek(), IP = IP, proxy = proxy, DataContext = DataContext
};
ars.stopwatch = new Stopwatch();
ars.stopwatch.Start();
hwr.BeginGetResponse(new AsyncCallback(ParseListingInfo), ars);
}
ProcessingListings[IP].Add(ListingQueue.Dequeue());
}
else
{
if (FeedQueues[IP].Count == 0)
{
BuildFeedQueue(IP, DataContext);
}
var selectedItem = FeedQueues[IP].First.Value;
FeedQueues[IP].RemoveFirst();
HttpWebRequest hwr = (HttpWebRequest)WebRequest.Create("http://" + selectedItem.Item2.Name + ".craigslist.org/search/" + (selectedItem.Item5 == null ? "" : (selectedItem.Item5.SubCity + "/")) + selectedItem.Item1.Name + "?s=" + selectedItem.Item3.ToString());
{
hwr.Proxy = proxy;
hwr.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
hwr.Headers.Add(HttpRequestHeader.AcceptEncoding, "gzip, deflate");
hwr.KeepAlive = false;
hwr.UserAgent = Properties.Settings.Default.UserAgent;
AsyncRequestStruct ars = new AsyncRequestStruct()
{
request = hwr, parameters = selectedItem, IP = IP, proxy = proxy, DataContext = DataContext
};
ars.stopwatch = new Stopwatch();
ars.stopwatch.Start();
hwr.BeginGetResponse(new AsyncCallback(ParseFeed), ars);
}
}
}
}
private void UF_CallbackAsynRequest(IAsyncResult result)
{
AsyncRequestStruct ars = ((AsyncRequestStruct)result.AsyncState);
DelegateResponse call = ars.callback;
HttpWebRequest _request = ars.request;
int retcode = WebRequestRetcode.SUCCESS;
byte[] bdata = null;
HttpWebResponse response = null;
//handle 列表中优先移除
UF_RemoveAsyncHandle(ars.id);
try{
response = (HttpWebResponse)_request.EndGetResponse(result);
Stream st = response.GetResponseStream();
List <byte> tmpDatas = new List <byte>();
int value = -1;
while ((value = st.ReadByte()) != -1)
{
tmpDatas.Add((byte)value);
}
bdata = tmpDatas.ToArray();
st.Close();
// response.Close();
//300以上为异常请求
if (retcode < (int)response.StatusCode)
{
retcode = WebRequestRetcode.SUCCESS;
}
else
{
Debugger.UF_Error("Http Response Abnormal: " + (int)response.StatusCode);
retcode = WebRequestRetcode.ABNORMAL;
}
}
catch (Exception e) {
Debugger.UF_Error("Http error<CallbackAsynRequest>:" + e.Message);
retcode = WebRequestRetcode.EXCEPTION_ON_RESPONSE;
}
if (response != null)
{
response.Close();
}
if (_request != null)
{
_request.Abort();
}
//回归主线程调用
UF_InvokCallback(call, retcode, bdata);
}
/// <summary>
/// 异步上传文件
/// </summary>
public bool UF_UploadFile(string url, string filePath, string headinfo, int timeOut, DelegateResponse callback)
{
if (!File.Exists(filePath))
{
//文件不存在
Debugger.UF_Error("UploadFile Not Exist: " + filePath);
if (callback != null)
{
callback(WebRequestRetcode.FILE_NOT_EXIST, null);
}
return(false);
}
AsyncRequestStruct ars = new AsyncRequestStruct();
int uid = GID;
HttpWebRequest request = null;
try{
ars.id = uid;
ars.stamp = System.Environment.TickCount;
ars.callback = callback;
lock (m_ListAsyncHandle){
m_ListAsyncHandle.Add(ars);
}
FileStream fs = File.OpenRead(filePath);
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, (int)fs.Length);
fs.Close();
//request = (HttpWebRequest)HttpWebRequest.Create(url);
request = System.Net.WebRequest.CreateHttp(url);
if (!string.IsNullOrEmpty(headinfo))
{
request.Headers.Add(HttpRequestHeader.Authorization, headinfo);
}
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = buffer.Length;
Stream postStream = request.GetRequestStream();
postStream.Write(buffer, 0, buffer.Length);
postStream.Close();
ars.request = request;
ars.request.Timeout = timeOut;
ars.request.BeginGetResponse(new AsyncCallback(UF_CallbackAsynRequest), ars);
}
catch (Exception e) {
UF_RemoveAsyncHandle(uid);
if (request != null)
{
request.Abort();
}
Debugger.UF_Error("Http error<UploadFile>:" + e.Message);
if (callback != null)
{
callback(WebRequestRetcode.EXCEPTION_ON_REQUEST, null);
}
return(false);
}
return(true);
}
public void ParseListingInfo(IAsyncResult AsyncResult)
{
bool banned403 = false;
Stopwatch sw = new Stopwatch();
sw.Start();
AsyncRequestStruct ars = (AsyncRequestStruct)AsyncResult.AsyncState;
try
{
ars.stopwatch.Stop();
parseInfoConnectionCount++;
parseInfoConnectionTime += ars.stopwatch.Elapsed;
Listing listingSource = (Listing)ars.parameters;
HtmlDocument response = new HtmlDocument();
try
{
using (WebResponse wr = ars.request.EndGetResponse(AsyncResult))
{
using (Stream stream = wr.GetResponseStream())
{
using (StreamReader sr = new StreamReader(stream))
{
response.LoadHtml(sr.ReadToEnd());
}
}
}
}
catch (Exception ex)
{
if (ex.Message.Contains("(403)")) //If a 403 occurs, remove the proxy from operation.
{
if (Properties.Settings.Default.DisabledBannedProxies)
{
WebProxy wp = (WebProxy)ars.request.Proxy;
lock (KeyChain[ars.IP])
{
Proxy selectedProxy = ars.DataContext.Proxies.FirstOrDefault(x => x.IP == wp.Address.Host && x.Port == wp.Address.Port);
if (selectedProxy != null)
{
selectedProxy.Enabled = false;
lock (MasterKey)
{
ars.DataContext.SubmitChanges();
}
}
}
}
lock (KeyChain[ars.IP])
{
ListingQueues[ars.IP].Enqueue(listingSource);
ProcessingListings[ars.IP].Remove(listingSource);
}
lock (EventLogKey)
{
EventLog.WriteEntry("Proxy has been banned." + PrintException(ex) + PrintListing(listingSource), EventLogEntryType.Warning);
}
banned403 = true;
}
else
{
lock (KeyChain[ars.IP])
{
if (ListingFailures[ars.IP].Keys.Contains(listingSource))
{
ListingFailures[ars.IP][listingSource]++;
if (ListingFailures[ars.IP][listingSource] > Properties.Settings.Default.MaxConnectionRetries)
{
ListingFailures[ars.IP].Remove(listingSource);
}
else
{
ListingQueues[ars.IP].Enqueue(listingSource);
ProcessingListings[ars.IP].Remove(listingSource);
}
}
else
{
ListingFailures[ars.IP].Add(listingSource, 1);
ListingQueues[ars.IP].Enqueue(listingSource);
ProcessingListings[ars.IP].Remove(listingSource);
}
}
lock (EventLogKey)
{
EventLog.WriteEntry("An error has occurred while retrieving the listing info:\n\n" + PrintException(ex) + PrintListing(listingSource), EventLogEntryType.Warning);
}
}
return;
}
//LISTING WAS DELETED
{
HtmlNode hn = response.DocumentNode.SelectSingleNode("//div[@class='removed']");
if (hn != null)
{
lock (KeyChain[ars.IP])
{
ProcessingListings[ars.IP].Remove(listingSource);
}
return;
}
}
//POSTDATE
try
{
listingSource.PostDate = DateTime.Parse(response.DocumentNode.SelectSingleNode("//p[@id='display-date']/time").Attributes["datetime"].Value);
}
catch (Exception ex)
{
lock (EventLogKey)
{
EventLog.WriteEntry("Listing skipped. Post date could not be identified or parsed.\n\n" + PrintException(ex) + PrintListing(listingSource) + ex.Message, EventLogEntryType.Warning);
}
lock (KeyChain[ars.IP])
{
ProcessingListings[ars.IP].Remove(listingSource);
}
return;
}
//GPS COORDINATES
if (listingSource.ListingAttributes.Any(x => x.Name == "Has Map"))
{
try
{
HtmlNode hn = response.DocumentNode.SelectSingleNode("//div[@id='map' and @data-latitude and @data-longitude and @data-accuracy]");
listingSource.ListingAttributes.Add(new ListingAttribute()
{
Name = "Latitude", Value = hn.Attributes["data-latitude"].Value
});
listingSource.ListingAttributes.Add(new ListingAttribute()
{
Name = "Longitude", Value = hn.Attributes["data-longitude"].Value
});
listingSource.ListingAttributes.Add(new ListingAttribute()
{
Name = "Location Accuracy", Value = hn.Attributes["data-accuracy"].Value
});
}
catch (Exception ex)
{
lock (EventLogKey)
{
EventLog.WriteEntry("Error parsing GPS coordinates:\n\n" + PrintException(ex) + PrintListing(listingSource));
}
}
}
//ADDRESS
{
HtmlNode hn = response.DocumentNode.SelectSingleNode("//div[@class='mapaddress']");
if (hn != null)
{
try
{
listingSource.ListingAttributes.Add(new ListingAttribute()
{
Name = "Address", Value = hn.InnerText
});
}
catch (Exception ex)
{
lock (EventLogKey)
{
EventLog.WriteEntry("Error parsing map address: \n\n" + ex.Message);
}
}
}
}
HtmlNodeCollection hnc = response.DocumentNode.SelectNodes("//p[@class='attrgroup']/span");
if (hnc == null)
{
return; //returns NULL if no nodes exist.
}
foreach (HtmlNode hn in hnc)
{
string[] parts = hn.InnerText.Split(':');
if (parts.Length == 2)
{
listingSource.ListingAttributes.Add(
new ListingAttribute()
{
Name = parts[0].Trim(),
Value = parts[1].Trim()
}
);
}
else if (parts.Length == 1) //More ads by this user is styled like an attribute, but is actually just a link. It provides no info besides userid.
{
listingSource.ListingAttributes.Add(
new ListingAttribute()
{
Name = "Unspecified",
Value = parts[0].Trim()
}
);
}
}
//BODY
try
{
HtmlNode hn = response.DocumentNode.SelectSingleNode("//section[@id='postingbody']");
listingSource.Body = hn.InnerText;
}
catch (Exception ex)
{
lock (KeyChain[ars.IP])
{
ProcessingListings[ars.IP].Remove(listingSource);
}
lock (EventLogKey)
{
EventLog.WriteEntry("An error has occurred while parsing the listing body: \n\n" + PrintException(ex) + PrintListing(listingSource), EventLogEntryType.Warning);
}
return;
}
lock (KeyChain[ars.IP])
{
ars.DataContext.Listings.InsertOnSubmit(listingSource);
CompletedListingIds[ars.IP].Add(listingSource.Id);
ProcessingListings[ars.IP].Remove(listingSource);
SubmitData(ars.DataContext);
}
}
finally
{
sw.Stop();
parseInfoProcessingTime += sw.Elapsed;
parseInfoProcessingCount++;
if (ConnectionCooldown > 0 && sw.Elapsed < TimeSpan.FromMilliseconds(ConnectionCooldown))
{
Thread.Sleep(TimeSpan.FromMilliseconds(ConnectionCooldown) - sw.Elapsed);
}
try
{
if (banned403 == false)
{
FetchNextWhatchamacallit(ars.IP, ars.proxy, ars.DataContext);
}
}
catch (Exception ex)
{
lock (EventLogKey)
{
EventLog.WriteEntry("Error fetching requests from next queue.\n\n" + ex.Message);
}
}
}
}
private void ParseFeed(IAsyncResult AsyncResult)
{
bool banned403 = false;
Stopwatch sw = new Stopwatch();
sw.Start();
AsyncRequestStruct ars = (AsyncRequestStruct)AsyncResult.AsyncState;
try
{
ars.stopwatch.Stop();
parseFeedConnectionCount++;
parseFeedConnectionTime += ars.stopwatch.Elapsed;
Tuple <CLSiteSection, CLCity, int, DateTime, CLSubCity> feedResource = (Tuple <CLSiteSection, CLCity, int, DateTime, CLSubCity>)ars.parameters;
CLSiteSection SiteSection = feedResource.Item1;
CLCity City = feedResource.Item2;
int depth = feedResource.Item3;
DateTime lastStamp = feedResource.Item4;
CLSubCity subCity = feedResource.Item5;
HtmlDocument response = new HtmlDocument();
try
{
using (WebResponse wr = ars.request.EndGetResponse(AsyncResult))
{
using (Stream stream = wr.GetResponseStream())
{
using (StreamReader sr = new StreamReader(stream))
{
response.LoadHtml(sr.ReadToEnd());
}
}
}
}
catch (Exception ex)
{
if (ex.Message.Contains("(403)")) //If a 403 occurs, remove the proxy from operation.
{
if (Properties.Settings.Default.DisabledBannedProxies)
{
WebProxy wp = (WebProxy)ars.request.Proxy;
Proxy selectedProxy = ars.DataContext.Proxies.FirstOrDefault(x => x.IP == wp.Address.Host && x.Port == wp.Address.Port);
if (selectedProxy != null)
{
selectedProxy.Enabled = false;
lock (KeyChain[ars.IP])
{
lock (MasterKey)
{
ars.DataContext.SubmitChanges();
}
}
}
}
banned403 = true;
return;
}
lock (EventLogKey)
{
EventLog.WriteEntry("An error has occurred while retreiving a feed:\n\n" + ex.Message + "\n\n" + (ex.InnerException == null ? "" : ex.InnerException.Message)
+ "\n\n" + SiteSection.Name + "\n" + City.Name + "\n" + depth.ToString(), EventLogEntryType.Warning);
}
return;
}
HtmlNodeCollection rows = response.DocumentNode.SelectNodes("//p[@class='row' and @data-pid]");
if (rows == null)
{
//The eventlog below is not necessarily true. It's possible that the end of the feeds has been reached and there are no more listings.
//EventLog.WriteEntry("Error while parsing feed. No connection errors thrown, but no results returned either.\n" + SiteSection.Name + "\n" + City.Name + "\n" + (subCity==null?"":("\n"+subCity.SubCity)) + "\n" + depth.ToString());
return;
}
bool NoUpdateTimesPosted = false;
foreach (HtmlNode row in rows)
{
if (row.SelectSingleNode("a").Attributes["href"].Value.Contains("craigslist."))
{ //This condition deals with "Nearby Areas". Links within the locale are relative -> /<sectionCode>/<Id>.html, whereas out of the locale are global -> http://<city.Name>/craigslist.org/<sectionCode>/<Id>.html
return;
}
Listing listingSource = new Listing()
{
CLSiteSection = SiteSection, CLCity = City, CLSubCity = subCity, Timestamp = DateTime.Now
};
//LASTUPDATED
try
{
HtmlNode hn = row.SelectSingleNode("span[@class='txt']/span[@class='pl']/time");
if (hn != null && DateTime.Parse(hn.Attributes["datetime"].Value) <= lastStamp)
{
return;
}
else if (hn == null)
{
NoUpdateTimesPosted = true;
}
}
catch (Exception ex)
{
lock (EventLogKey)
{
EventLog.WriteEntry("Failure to parse listing update time.\n\n" + PrintException(ex) + PrintListing(listingSource), EventLogEntryType.Error);
}
return;
}
//ID
try
{
listingSource.Id = long.Parse(row.Attributes["data-pid"].Value);
}
catch (Exception ex)
{
lock (EventLogKey)
{
EventLog.WriteEntry("Listing has an invalid ID:\n\n" + PrintException(ex) + PrintListing(listingSource), EventLogEntryType.Warning);
}
continue;
}
lock (KeyChain[ars.IP])
{
if (CompletedListingIds[ars.IP].Contains(listingSource.Id) ||
ListingQueues[ars.IP].Any(x => x.Id == listingSource.Id) ||
ProcessingListings[ars.IP].Any(x => x.Id == listingSource.Id) ||
PreQueueListings[ars.IP].Any(x => x.Id == listingSource.Id)
)
{
continue;
}
PreQueueListings[ars.IP].Add(listingSource);
}
//PRICE
{
HtmlNode hn = row.SelectSingleNode("span[@class='txt']/span[@class='l2']/span[@class='price']");
if (hn != null)
{
try
{
string value = long.Parse(hn.InnerText.Replace("$", "").Replace(@"$", "")).ToString();
listingSource.ListingAttributes.Add(
new ListingAttribute()
{
Name = "price",
Value = value
}
);
}
catch (Exception ex)
{
lock (EventLogKey)
{
EventLog.WriteEntry("Error parsing price listing data: " + hn.InnerText.Replace("$", "").Replace(@"$", "") + "\n\n" + PrintException(ex) + PrintListing(listingSource), EventLogEntryType.Warning);
}
}
}
}
//LOCALE
{
HtmlNode hn = row.SelectSingleNode("span[@class='txt']/span[@class='l2']/span[@class='pnr']/small");
if (hn != null)
{
try
{
listingSource.ListingAttributes.Add(new ListingAttribute()
{
Name = "Locale", Value = hn.InnerText.Replace("(", "").Replace(")", "").Trim()
});
}
catch (Exception ex)
{
lock (EventLogKey)
{
EventLog.WriteEntry("Error parsing listing locale data: " + hn.InnerText.Replace("(", "").Replace(")", "").Trim() + "\n\n" + PrintException(ex) + PrintListing(listingSource), EventLogEntryType.Warning);
}
}
}
}
//HAS PICTURE, HAS MAP
try
{
HtmlNode hn = row.SelectSingleNode("span[@class='txt']/span[@class='l2']/span[@class='pnr']/span[@class='px']/span[@class='p']");
if (hn != null)
{
if (hn.InnerText.Contains("pic"))
{
listingSource.ListingAttributes.Add(new ListingAttribute()
{
Name = "Has Picture", Value = "True"
});
}
if (hn.InnerText.Contains("map"))
{
listingSource.ListingAttributes.Add(new ListingAttribute()
{
Name = "Has Map", Value = "True"
});
}
}
}
catch (Exception ex)
{
lock (EventLogKey)
{
EventLog.WriteEntry("Error while parsing pic and map presence:\n" + PrintException(ex) + PrintListing(listingSource), EventLogEntryType.Warning);
}
}
//TITLE
try
{
listingSource.Title = row.SelectSingleNode("span[@class='txt']/span[@class='pl']/a[@class='hdrlnk']").InnerText;
}
catch (Exception ex)
{
lock (EventLogKey)
{
EventLog.WriteEntry("Listing skipped. Error parsing title from listing.\n\n" + PrintException(ex) + PrintListing(listingSource), EventLogEntryType.Warning);
}
lock (KeyChain[ars.IP])
{
PreQueueListings[ars.IP].Remove(listingSource);
}
continue;
}
lock (KeyChain[ars.IP])
{
ListingQueues[ars.IP].Enqueue(listingSource);
ProcessingListings[ars.IP].Remove(listingSource);
PreQueueListings[ars.IP].Remove(listingSource);
}
}
//If the for loop completes without a return, the next page needs to be looked at
if (NoUpdateTimesPosted == false)
{
lock (KeyChain[ars.IP])
{
FeedQueues[ars.IP].AddFirst(new Tuple <CLSiteSection, CLCity, int, DateTime, CLSubCity>(feedResource.Item1, feedResource.Item2, feedResource.Item3 + 100, feedResource.Item4, feedResource.Item5));
}
}
}
catch (Exception ex)
{
lock (EventLogKey)
{
EventLog.WriteEntry("An error has occurred while parsing the feed:\n\n" + PrintException(ex), EventLogEntryType.Error);
}
}
finally
{
sw.Stop();
parseFeedProcessingTime += sw.Elapsed;
parseFeedProcessingCount++;
if (ConnectionCooldown > 0 && sw.Elapsed < TimeSpan.FromMilliseconds(ConnectionCooldown))
{
Thread.Sleep(TimeSpan.FromMilliseconds(ConnectionCooldown) - sw.Elapsed);
}
try
{
if (banned403 == false)
{
FetchNextWhatchamacallit(ars.IP, ars.proxy, ars.DataContext);
}
}
catch (Exception ex)
{
lock (EventLogKey)
{
EventLog.WriteEntry("Error fetching requests from next queue.\n\n" + PrintException(ex));
}
}
}
}
