/// <summary>
/// Provides an async method to request to retrieve edge server and client IP info.
/// </summary>
/// <param name="edgeServerRules">The rules to help define the request and how the response is parsed.</param>
/// <param name="baseUri">The base Uri optionally used to create the request Uri. Only used if a pattern is specified in EdgeServerRules.</param>
public static IAsyncResult BeginGetEdgeServer(EdgeServerRules edgeServerRules, Uri baseUri, AsyncCallback callback, object state)
{
if (edgeServerRules == null)
{
throw new ArgumentNullException("edgeServerRules");
}
Uri ipRequestUri;
if (baseUri != null)
{
ipRequestUri = new Uri(string.Format(CultureInfo.InvariantCulture, edgeServerRules.EdgeResolverUrlPattern, baseUri.Host, baseUri.Port), UriKind.Absolute);
}
else
{
ipRequestUri = new Uri(edgeServerRules.EdgeResolverUrlPattern, UriKind.Absolute);
}
// use the client networking stack so we can read headers
HttpWebRequest request = (HttpWebRequest)WebRequestCreator.ClientHttp.Create(ipRequestUri);
for (int i = 0; i < edgeServerRules.EdgeResolverHeaders.Count; i = i + 2)
{
string key = edgeServerRules.EdgeResolverHeaders[i];
string value = edgeServerRules.EdgeResolverHeaders[i + 1];
request.Headers[key] = value;
}
request.Method = "GET";
return(request.BeginGetResponse(callback, new object[] { request, edgeServerRules, state }));
}
void SmoothStreamingSourceChanged(string url)
{
Uri currentStreamUri = new Uri(url, UriKind.Absolute);
IsEdgeServerComplete = false;
EdgeServer = EdgeServerDataClient.IpNA; // clear the current edge server
ClientIP = EdgeServerDataClient.IpNA;
if (Configuration.EdgeServerRuleCollection != null)
{
EdgeServerRules addressRules = Configuration.EdgeServerRuleCollection.FirstOrDefault(ai => ai.Domain != null && currentStreamUri.Host.EndsWith(ai.Domain, StringComparison.OrdinalIgnoreCase));
// fallback on the address rules without a domain
if (addressRules == null)
{
addressRules = Configuration.EdgeServerRuleCollection.FirstOrDefault(ai => ai.Domain == null);
}
try
{
if (addressRules != null)
{
EdgeServerDataClient edgeServerDataClient = new EdgeServerDataClient();
edgeServerDataClient.GetEdgeServerCompleted += (s, e) =>
{
// warning: this can come back after we've shut down, checking for the mediaelement is a good way to ensure we're still supposed to be tracking
if (mediaElement != null)
{
if (e.Result != null)
{
EdgeServer = e.Result.EdgeServer;
ClientIP = e.Result.ClientIP;
}
FinishSettingEdgeServer();
SmoothStreamingEvent entry = new SmoothStreamingEvent();
entry.EventType = EventType.AddressInfo;
entry.Data1 = ClientIP.ToString();
entry.Data2 = EdgeServer;
Enqueue(entry);
}
};
edgeServerDataClient.GetEdgeServerAsync(addressRules, currentStreamUri);
}
else
{
FinishSettingEdgeServer();
}
}
catch
{
FinishSettingEdgeServer();
}
}
else
{
FinishSettingEdgeServer();
}
}
/// <summary>
/// Loads a new instance of the EdgeServerRules class from Xml.
/// </summary>
/// <param name="reader"></param>
/// <returns></returns>
public static EdgeServerRules Load(XmlReader reader)
{
if (reader == null)
{
throw new ArgumentNullException("reader");
}
var result = new EdgeServerRules();
reader.GoToElement();
if (!reader.IsEmptyElement)
{
result.Domain = reader.GetAttribute("Domain");
reader.ReadStartElement();
while (reader.GoToSibling())
{
switch (reader.LocalName)
{
case "EdgeResolverUrlPattern":
result.EdgeResolverUrlPattern = reader.ReadElementContentAsString();
break;
case "EdgeRegEx":
result.EdgeRegex = reader.ReadElementContentAsString();
break;
case "ClientIpRegEx":
result.ClientIPRegex = reader.ReadElementContentAsString();
break;
case "ClientIpHeader":
result.ClientIPHeader = reader.ReadElementContentAsString();
break;
case "EdgeResolverHeaders":
result.EdgeResolverHeaders = reader.ReadElementContentAsString().Split(',');
break;
case "EdgeHeader":
result.EdgeHeader = reader.ReadElementContentAsString();
break;
default:
reader.Skip();
break;
}
}
reader.ReadEndElement();
}
else
{
reader.Skip();
}
return(result);
}
/// <summary>
/// Loads a new instance of the EdgeServerRules class from Xml.
/// </summary>
/// <param name="reader"></param>
/// <returns></returns>
public static EdgeServerRules Load(XmlReader reader)
{
if (reader == null)
throw new ArgumentNullException("reader");
var result = new EdgeServerRules();
reader.GoToElement();
if (!reader.IsEmptyElement)
{
result.Domain = reader.GetAttribute("Domain");
reader.ReadStartElement();
while (reader.GoToSibling())
{
switch (reader.LocalName)
{
case "EdgeResolverUrlPattern":
result.EdgeResolverUrlPattern = reader.ReadElementContentAsString();
break;
case "EdgeRegEx":
result.EdgeRegex = reader.ReadElementContentAsString();
break;
case "ClientIpRegEx":
result.ClientIPRegex = reader.ReadElementContentAsString();
break;
case "ClientIpHeader":
result.ClientIPHeader = reader.ReadElementContentAsString();
break;
case "EdgeResolverHeaders":
result.EdgeResolverHeaders = reader.ReadElementContentAsString().Split(',');
break;
case "EdgeHeader":
result.EdgeHeader = reader.ReadElementContentAsString();
break;
default:
reader.Skip();
break;
}
}
reader.ReadEndElement();
}
else
reader.Skip();
return result;
}
/// <summary>
/// Provides an async method to request to retrieve edge server and client IP info.
/// </summary>
/// <param name="edgeServerRules">The rules to help define the request and how the response is parsed.</param>
/// <param name="baseUri">The base Uri optionally used to create the request Uri. Only used if a pattern is specified in EdgeServerRules.</param>
public static IAsyncResult BeginGetEdgeServer(EdgeServerRules edgeServerRules, Uri baseUri, AsyncCallback callback, object state)
{
if (edgeServerRules == null)
throw new ArgumentNullException("edgeServerRules");
Uri ipRequestUri;
if (baseUri != null)
ipRequestUri = new Uri(string.Format(CultureInfo.InvariantCulture, edgeServerRules.EdgeResolverUrlPattern, baseUri.Host, baseUri.Port), UriKind.Absolute);
else
ipRequestUri = new Uri(edgeServerRules.EdgeResolverUrlPattern, UriKind.Absolute);
// use the client networking stack so we can read headers
HttpWebRequest request = (HttpWebRequest)WebRequestCreator.ClientHttp.Create(ipRequestUri);
for (int i = 0; i < edgeServerRules.EdgeResolverHeaders.Count; i = i + 2)
{
string key = edgeServerRules.EdgeResolverHeaders[i];
string value = edgeServerRules.EdgeResolverHeaders[i + 1];
request.Headers[key] = value;
}
request.Method = "GET";
return request.BeginGetResponse(callback, new object[] { request, edgeServerRules, state });
}
/// <summary>
/// Initiates the async request to retrieve edge server and client IP info.
/// </summary>
/// <param name="edgeServerRules">The rules to help define the request and how the response is parsed.</param>
/// <param name="baseUri">The base Uri optionally used to create the request Uri. Only used if a pattern is specified in EdgeServerRules.</param>
public void GetEdgeServerAsync(EdgeServerRules edgeServerRules, Uri baseUri)
{
BeginGetEdgeServer(edgeServerRules, baseUri, new AsyncCallback(ReadCallback), null);
}
/// <summary>
/// Creates an instance of the main diagnostic config object from an XmlReader
/// </summary>
public static DiagnosticsConfig Load(XmlReader reader)
{
if (reader == null)
{
throw new ArgumentNullException("reader");
}
var result = new DiagnosticsConfig();
List <EdgeServerRules> edgeServerRuleCollection = null;
reader.GoToElement();
reader.ReadStartElement();
if (!reader.IsEmptyElement)
{
while (reader.GoToSibling())
{
switch (reader.LocalName)
{
case "TraceMonitor":
result.TracingConfig = TracingConfig.Load(reader);
break;
case "EdgeServerRules":
if (!reader.IsEmptyElement)
{
if (edgeServerRuleCollection == null)
{
edgeServerRuleCollection = new List <EdgeServerRules>();
result.EdgeServerRuleCollection = edgeServerRuleCollection;
}
edgeServerRuleCollection.Add(EdgeServerRules.Load(reader));
}
else
{
reader.Skip();
}
break;
case "Diagnostics":
if (!reader.IsEmptyElement)
{
reader.ReadStartElement();
while (reader.GoToSibling())
{
switch (reader.LocalName)
{
case "TrackQuality":
result.TrackQuality = Convert.ToBoolean(reader.ReadElementContentAsInt());
break;
case "TrackDownloadErrors":
result.TrackDownloadErrors = Convert.ToBoolean(reader.ReadElementContentAsInt());
break;
case "AggregationIntervalMilliseconds":
result.AggregationInterval = TimeSpan.FromMilliseconds(reader.ReadElementContentAsInt());
break;
case "TrackQualitySnapshot":
result.TrackQualitySnapshot = Convert.ToBoolean(reader.ReadElementContentAsInt());
break;
case "SnapshotIntervalMilliseconds":
result.SnapshotInterval = TimeSpan.FromMilliseconds(reader.ReadElementContentAsInt());
break;
case "LatencyAlertThreshold":
result.LatencyAlertThreshold = reader.ReadElementContentAsFloat();
break;
case "RecordTraceLogs":
result.RecordTraceLogs = Convert.ToBoolean(reader.ReadElementContentAsInt());
break;
case "QualityTracking":
result.QualityConfig = QualityConfig.Load(reader);
break;
default:
reader.Skip();
break;
}
}
reader.ReadEndElement();
}
else
{
reader.Skip();
}
break;
default:
reader.Skip();
break;
}
}
reader.ReadEndElement();
}
else
{
reader.Skip();
}
return(result);
}
/// <summary>
/// The call back used in combination with BeginGetEdgeServer
/// </summary>
/// <returns>The result of the edge server detection request.</returns>
public static EdgeServerResult EndGetEdgeServer(IAsyncResult asynchronousResult)
{
if (asynchronousResult == null)
{
throw new ArgumentNullException("asynchronousResult");
}
object[] args = (object[])asynchronousResult.AsyncState;
HttpWebRequest request = (HttpWebRequest)args[0];
EdgeServerRules edgeServerRules = (EdgeServerRules)args[1];
HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(asynchronousResult);
string result;
using (StreamReader reader = new StreamReader(response.GetResponseStream()))
{
result = reader.ReadToEnd();
}
string thingToParse;
// get the edge server
string edgeServer = "";
thingToParse = result;
if (edgeServerRules.EdgeHeader != null)
{
if (response.SupportsHeaders)
{
thingToParse = response.Headers[edgeServerRules.EdgeHeader].Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries).FirstOrDefault();
}
}
if (edgeServerRules.EdgeRegex != null && thingToParse != null)
{
Regex regex = new Regex(edgeServerRules.EdgeRegex);
if (regex.IsMatch(thingToParse))
{
var matches = regex.Matches(thingToParse);
edgeServer = matches[0].Value;
}
}
// get the client IP
string clientIP = IpNA;
thingToParse = result;
if (edgeServerRules.ClientIPHeader != null)
{
if (response.SupportsHeaders)
{
thingToParse = response.Headers[edgeServerRules.ClientIPHeader];
}
}
if (edgeServerRules.ClientIPRegex != null && thingToParse != null)
{
Regex regex = new Regex(edgeServerRules.ClientIPRegex);
if (regex.IsMatch(thingToParse))
{
var matches = regex.Matches(thingToParse);
clientIP = matches[0].Value;
}
}
return(new EdgeServerResult(edgeServer, clientIP));
}
/// <summary>
/// Initiates the async request to retrieve edge server and client IP info.
/// </summary>
/// <param name="edgeServerRules">The rules to help define the request and how the response is parsed.</param>
/// <param name="baseUri">The base Uri optionally used to create the request Uri. Only used if a pattern is specified in EdgeServerRules.</param>
public void GetEdgeServerAsync(EdgeServerRules edgeServerRules, Uri baseUri)
{
BeginGetEdgeServer(edgeServerRules, baseUri, new AsyncCallback(ReadCallback), null);
}
