private IDisposable WriteStartElement(string title, IDictionary <string, string> attribs)
{
try
{
var info = new TraceInfo(title, attribs);
var ensureMaxXmlFiles = false;
if (String.IsNullOrEmpty(_file))
{
ensureMaxXmlFiles = true;
// generate trace file name base on attribs
_file = GenerateFileName(info);
}
var strb = new StringBuilder();
if (_isStartElement)
{
strb.AppendLine(">");
}
strb.Append(new String(' ', _infos.Count * 2));
strb.AppendFormat("<step title=\"{0}\" ", XmlUtility.EscapeXmlText(title));
strb.AppendFormat("date=\"{0}\" ", info.StartTime.ToString("yyyy-MM-ddTHH:mm:ss.fff"));
if (_infos.Count == 0)
{
strb.AppendFormat("instance=\"{0}\" ", InstanceIdUtility.GetShortInstanceId());
}
foreach (var attrib in attribs)
{
if (TraceExtensions.IsNonDisplayableAttribute(attrib.Key))
{
continue;
}
strb.AppendFormat("{0}=\"{1}\" ", attrib.Key, XmlUtility.EscapeXmlText(attrib.Value));
}
FileSystemHelpers.AppendAllTextToFile(_file, strb.ToString());
_infos.Push(info);
_isStartElement = true;
if (ensureMaxXmlFiles)
{
EnsureMaxXmlFiles();
}
return(new DisposableAction(() => WriteEndTrace()));
}
catch (Exception ex)
{
WriteUnexpectedException(ex);
}
return(DisposableAction.Noop);
}
private IDisposable WriteStartElement(string title, IDictionary<string, string> attribs)
{
try
{
var info = new TraceInfo(title, attribs);
var ensureMaxXmlFiles = false;
if (String.IsNullOrEmpty(_file))
{
ensureMaxXmlFiles = true;
// generate trace file name base on attribs
_file = GenerateFileName(info);
}
var strb = new StringBuilder();
if (_isStartElement)
{
strb.AppendLine(">");
}
strb.Append(new String(' ', _infos.Count * 2));
strb.AppendFormat("<step title=\"{0}\" ", XmlUtility.EscapeXmlText(title));
strb.AppendFormat("date=\"{0}\" ", info.StartTime.ToString("yyyy-MM-ddTHH:mm:ss.fff"));
if (_infos.Count == 0)
{
strb.AppendFormat("instance=\"{0}\" ", InstanceIdUtility.GetShortInstanceId());
}
foreach (var attrib in attribs)
{
if (TraceExtensions.IsNonDisplayableAttribute(attrib.Key))
{
continue;
}
strb.AppendFormat("{0}=\"{1}\" ", attrib.Key, XmlUtility.EscapeXmlText(attrib.Value));
}
FileSystemHelpers.AppendAllTextToFile(_file, strb.ToString());
_infos.Push(info);
_isStartElement = true;
if (ensureMaxXmlFiles)
{
EnsureMaxXmlFiles();
}
return new DisposableAction(() => WriteEndTrace());
}
catch (Exception ex)
{
WriteUnexpectedException(ex);
}
return DisposableAction.Noop;
}
public static bool ShouldTrace(TraceLevel level, TraceInfo info, int statusCode)
{
// if SCM_TRACE_LEVEL is set to 4 (verbose), always trace.
if (level >= TraceLevel.Verbose)
{
return(true);
}
// for api taking long time (>10s), always trace.
if (DateTime.UtcNow - info.StartTime >= ElapsedThreshold)
{
return(true);
}
string type;
string method;
string path;
if (!info.Attributes.TryGetValue("type", out type) ||
!info.Attributes.TryGetValue("method", out method) ||
!info.Attributes.TryGetValue("url", out path))
{
return(true);
}
// trace non get request
if (!String.Equals("request", type, StringComparison.OrdinalIgnoreCase) ||
!String.Equals("GET", method, StringComparison.OrdinalIgnoreCase))
{
return(true);
}
// NotModified
if (statusCode == 304)
{
return(false);
}
// non OK
if (statusCode != 200)
{
return(true);
}
// filter out those that may be polled by portal.
// remove query string
path = path.Split('?')[0].TrimEnd('/');
return(!TraceFilters.Any(filter => String.Equals(filter, path, StringComparison.OrdinalIgnoreCase)));
}
// such as <datetime>_<instance>_<salt>_get_<url>_<statusCode>.xml
// sample: 2014-11-17T04-59-21_d10e51_366_GET_api-deployments_200.xml
private string GenerateFileName(TraceInfo info)
{
var strb = new StringBuilder();
// add salt to avoid collision
// mathematically improbable for salt to overflow
strb.AppendFormat("{0}_{1}_{2:000}",
info.StartTime.ToString("yyyy-MM-ddTHH-mm-ss"),
InstanceIdUtility.GetShortInstanceId(),
Interlocked.Increment(ref _salt) % 1000);
if (info.Title == XmlTracer.IncomingRequestTrace)
{
var path = info.Attributes["url"].Split('?')[0].Trim('/');
strb.AppendFormat("_{0}_{1}", info.Attributes["method"], path.ToSafeFileName());
}
else if (info.Title == XmlTracer.StartupRequestTrace)
{
var path = info.Attributes["url"].Split('?')[0].Trim('/');
strb.AppendFormat("_Startup_{0}_{1}", info.Attributes["method"], path.ToSafeFileName());
}
else if (info.Title == XmlTracer.ProcessShutdownTrace)
{
strb.Append("_Shutdown");
}
else if (info.Title == XmlTracer.ExecutingExternalProcessTrace)
{
var path = info.Attributes["path"].Split('\\').Last();
strb.AppendFormat("_{0}", path);
}
else if (string.Equals(XmlTracer.BackgroundTrace, info.Title, StringComparison.Ordinal))
{
var path = info.Attributes["url"].Split('?')[0].Trim('/');
strb.AppendFormat("_Background_{0}_{1}", info.Attributes["method"], path.ToSafeFileName());
}
else if (!String.IsNullOrEmpty(info.Title))
{
strb.AppendFormat("_{0}", info.Title.ToSafeFileName());
}
strb.Append(PendingXml);
return(Path.Combine(_path, strb.ToString()));
}
// such as <datetime>_<instance>_<salt>_get_<url>_<statusCode>.xml
// sample: 2014-11-17T04-59-21_d10e51_366_GET_api-deployments_200.xml
private string GenerateFileName(TraceInfo info)
{
var strb = new StringBuilder();
// add salt to avoid collision
// mathematically improbable for salt to overflow
strb.AppendFormat("{0}_{1}_{2:000}",
info.StartTime.ToString("yyyy-MM-ddTHH-mm-ss"),
InstanceIdUtility.GetShortInstanceId(),
Interlocked.Increment(ref _salt) % 1000);
if (info.Title == XmlTracer.IncomingRequestTrace)
{
var path = info.Attributes["url"].Split('?')[0].Trim('/');
strb.AppendFormat("_{0}_{1}", info.Attributes["method"], path.ToSafeFileName());
}
else if (info.Title == XmlTracer.StartupRequestTrace)
{
var path = info.Attributes["url"].Split('?')[0].Trim('/');
strb.AppendFormat("_Startup_{0}_{1}", info.Attributes["method"], path.ToSafeFileName());
}
else if (info.Title == XmlTracer.ProcessShutdownTrace)
{
strb.Append("_Shutdown");
}
else if (info.Title == XmlTracer.ExecutingExternalProcessTrace)
{
var path = info.Attributes["path"].Split('\\').Last();
strb.AppendFormat("_{0}", path);
}
else if (string.Equals(XmlTracer.BackgroundTrace, info.Title, StringComparison.Ordinal))
{
var path = info.Attributes["url"].Split('?')[0].Trim('/');
strb.AppendFormat("_Background_{0}_{1}", info.Attributes["method"], path.ToSafeFileName());
}
else if (!String.IsNullOrEmpty(info.Title))
{
strb.AppendFormat("_{0}", info.Title.ToSafeFileName());
}
strb.Append(PendingXml);
return Path.Combine(_path, strb.ToString());
}
public static bool ShouldTrace(TraceLevel level, TraceInfo info, int statusCode)
{
// if SCM_TRACE_LEVEL is set to 4 (verbose), always trace.
if (level >= TraceLevel.Verbose)
{
return true;
}
// for api taking long time (>10s), always trace.
if (DateTime.UtcNow - info.StartTime >= ElapsedThreshold)
{
return true;
}
string type;
string method;
string path;
if (!info.Attributes.TryGetValue("type", out type)
|| !info.Attributes.TryGetValue("method", out method)
|| !info.Attributes.TryGetValue("url", out path))
{
return true;
}
// trace non get request
if (!String.Equals("request", type, StringComparison.OrdinalIgnoreCase)
|| !String.Equals("GET", method, StringComparison.OrdinalIgnoreCase))
{
return true;
}
// NotModified
if (statusCode == 304)
{
return false;
}
// non OK
if (statusCode != 200)
{
return true;
}
// filter out those that may be polled by portal.
// remove query string
path = path.Split('?')[0].TrimEnd('/');
return !TraceFilters.Any(filter => String.Equals(filter, path, StringComparison.OrdinalIgnoreCase));
}