/// <summary>
/// Constructor.
/// </summary>
/// <param name="packet">The switch packet.</param>
internal SwitchEventReceivedArgs(SwitchPacket packet)
{
ArgCollection properties;
ArgCollection variables;
string eventName;
this.TimeUtc = packet.Headers.Get("Event-Date-GMT", DateTime.MinValue);
if (packet.Headers.TryGetValue("Event-Name", out eventName))
{
this.EventName = eventName;
this.EventCode = SwitchHelper.ParseEventCode(eventName);
}
else
{
// I don't think this should ever happen.
SysLog.LogWarning("SwitchConnection received an event without an [Event-Name] property.");
this.EventName = string.Empty;
this.EventCode = default(SwitchEventCode);
}
SwitchHelper.ProcessEventProperties(packet.Headers, out properties, out variables);
this.Properties = properties;
this.Variables = variables;
this.ContentType = packet.ContentType;
this.Content = packet.Content;
this.ContentText = packet.ContentText;
}
/// <summary>
/// Handles the parsing of the event properties and subcontent from the packet content. The packet's
/// <see cref="Headers"/> dictionary, as well as the <see cref="ContentType"/>, <see cref="Content" />,
/// and <see cref="ContentText" /> property values will be overwritten with the parsed event
/// properties.
/// </summary>
private void ParseEvent()
{
Assertion.Test(PacketType == SwitchPacketType.Event);
if (Content == null)
{
SysLog.LogWarning("Encountered switch event packet with no content.");
PacketType = SwitchPacketType.Unknown;
return;
}
string headers;
int cbContent;
int pos;
string[] lines;
string[] fields;
string name;
string value;
pos = Helper.IndexOf(Content, LFLF);
if (pos == -1)
{
SysLog.LogWarning("Ignoring a switch event packet with headers not terminated by LFLF.");
PacketType = SwitchPacketType.Unknown;
return;
}
// Parse the event headers.
headers = Helper.ASCIIEncoding.GetString(Content, 0, pos);
this.Headers = new ArgCollection(ArgCollectionType.Unconstrained);
lines = headers.Split('\n');
foreach (var line in lines)
{
fields = line.Split(new char[] { ':' }, 2);
if (fields.Length < 2)
{
continue;
}
name = fields[0].Trim();
value = Helper.UrlDecode(fields[1].Trim());
Headers[name] = value;
}
if (!Headers.TryGetValue("Event-Name", out value))
{
SysLog.LogWarning("Ignoring a switch event packet without an [Event-Name] header.");
PacketType = SwitchPacketType.Unknown;
return;
}
EventCode = SwitchHelper.ParseEventCode(value);
// Extract the event content data.
pos += 2; // Skip over the LFLF after the headers.
ContentType = null;
ContentText = null;
if (Headers.TryGetValue("Content-Length", out value))
{
cbContent = int.Parse(value);
Content = Helper.Extract(Content, pos);
if (Content.Length != cbContent)
{
SysLog.LogWarning("Ignoring malformed switch event packet. Expected [{0}] bytes of event content but received [{1}] bytes.", cbContent, Content.Length);
PacketType = SwitchPacketType.Unknown;
return;
}
if (Headers.TryGetValue("Content-Type", out value))
{
ContentType = value.ToLower();
if (ContentType != null && ContentType.StartsWith("text"))
{
ContentText = Helper.ASCIIEncoding.GetString(Content);
}
}
}
else
{
Content = null;
}
}