/// <summary>
/// Based on the time it took a request to run, we adjust the priority
/// of future requests sent by an object
/// </summary>
/// <param name="req"></param>
private void AdjustObjectPriority(HttpRequestObject req)
{
Amib.Threading.WorkItemPriority prio = GetObjectPriority(req.SogID);
if (req.RequestDuration >= SLOW_SCRIPT_TIME)
{
if (prio > Amib.Threading.WorkItemPriority.Lowest)
{
prio--;
SetObjectPriority(req.SogID, prio);
}
}
else if (req.RequestDuration < NORMAL_SCRIPT_TIME)
{
if (prio < Amib.Threading.WorkItemPriority.Normal)
{
prio++;
SetObjectPriority(req.SogID, prio);
}
}
else
{
//just ping the timestamp if it exists
UpdatePriorityTimestamp(req.SogID);
}
//also if this request was low priority, maintain the counts
--m_numLowPriorityQueued;
}
private void ProcessRequest(HttpRequestObject req)
{
req.Process();
lock (m_httpListLock)
{
m_pendingRequests.Remove(req.ReqID);
m_completedRequests.Enqueue(req);
DecrementObjectQueue(req.SogID);
AdjustObjectPriority(req);
MaintainPriorityQueue();
}
}
public UUID StartHttpRequest(UUID sogId, uint localID, UUID itemID, string url, string[] parms, Dictionary <string, string> headers, string body)
{
//if there are already too many requests globally, reject this one
if (RequestQueueFreeSpacePercentage == 0.0f)
{
return(UUID.Zero);
}
// fast exit for the common case of scripter error passing an empty URL
if (String.IsNullOrEmpty(url))
{
return(UUID.Zero);
}
if (BlockedByBlacklist(url))
{
return(UUID.Zero);
}
UUID reqID = UUID.Random();
HttpRequestObject htc = new HttpRequestObject();
// Partial implementation: support for parameter flags needed
// see http://wiki.secondlife.com/wiki/LlHTTPRequest
//
// Parameters are expected in {key, value, ... , key, value}
try
{
int i = 0;
while (i < parms.Length)
{
switch (Int32.Parse(parms[i++]))
{
case (int)HttpRequestConstants.HTTP_METHOD:
// This one was validated to be one of the valid values for method in LSLSystemAPI.cs
htc.HttpMethod = parms[i++];
break;
case (int)HttpRequestConstants.HTTP_MIMETYPE:
htc.HttpMIMEType = parms[i++];
break;
case (int)HttpRequestConstants.HTTP_BODY_MAXLENGTH:
htc.HttpBodyMaxLength = int.Parse(parms[i++]);
break;
case (int)HttpRequestConstants.HTTP_VERIFY_CERT:
htc.HttpVerifyCert = (int.Parse(parms[i++]) != 0);
break;
case (int)HttpRequestConstants.HTTP_VERBOSE_THROTTLE:
htc.HttpVerboseThrottle = (int.Parse(parms[i++]) != 0);
break;
case (int)HttpRequestConstants.HTTP_CUSTOM_HEADER:
string key = parms[i++];
string value = parms[i++];
// The script is not allowed to override some of the headers.
if (ScriptCanChangeHeader(key))
{
if (headers.ContainsKey(key))
{
// In SL, duplicate headers add to the existing header after a comma+space
headers[key] += ", " + value;
}
else
{
headers.Add(key, value);
}
}
break;
case (int)HttpRequestConstants.HTTP_PRAGMA_NO_CACHE:
// What if there is more than one pragma header defined?
bool noCache = (int.Parse(parms[i++]) != 0);
if (noCache == true)
{
headers.Add("Pragma", "no-cache");
}
else if (headers.ContainsKey("Pragma"))
{
headers.Remove("Pragma");
}
break;
default:
// Invalid Parameter Type. Log an error?
// Fail the request by returning a Null Key
return(UUID.Zero);
}
}
}
catch (System.IndexOutOfRangeException)
{
// They passed us junk, we stepped past the end of the array.
// We'll fail the request by returning a NULL_KEY
return(UUID.Zero);
}
if (m_debugLevel >= 1)
{
MainConsole.Instance.OutputFormat("httprequest: LocalID={0} URL={1}", localID, url);
}
htc.LocalID = localID;
htc.ItemID = itemID;
htc.SogID = sogId;
htc.Url = url;
htc.ReqID = reqID;
htc.HttpTimeout = HTTP_TIMEOUT;
htc.OutboundBody = body;
htc.ResponseHeaders = headers;
htc.proxyurl = m_proxyurl;
htc.proxyexcepts = m_proxyexcepts;
Amib.Threading.WorkItemPriority prio;
lock (m_httpListLock)
{
//if there are already too many requests for this script running, reject this one
if (!TryIncrementObjectQueue(sogId))
{
return(UUID.Zero);
}
prio = GetObjectPriority(sogId);
if (prio == Amib.Threading.WorkItemPriority.Lowest)
{
if (m_numLowPriorityQueued < MAX_SLOW_REQUEST_QUEUE_SIZE)
{
htc.IsLowPriority = true;
++m_numLowPriorityQueued;
}
else
{
DecrementObjectQueue(sogId);
return(UUID.Zero);
}
}
m_pendingRequests.Add(reqID, htc);
}
if (prio > Amib.Threading.WorkItemPriority.Lowest)
{
_threadPool.QueueWorkItem(() => this.ProcessRequest(htc));
}
else
{
_slowPool.QueueWorkItem(() => this.ProcessRequest(htc));
}
return(reqID);
}
/// <summary>
/// Based on the time it took a request to run, we adjust the priority
/// of future requests sent by an object
/// </summary>
/// <param name="req"></param>
private void AdjustObjectPriority(HttpRequestObject req)
{
Amib.Threading.WorkItemPriority prio = GetObjectPriority(req.SogID);
if (req.RequestDuration >= SLOW_SCRIPT_TIME)
{
if (prio > Amib.Threading.WorkItemPriority.Lowest)
{
prio--;
SetObjectPriority(req.SogID, prio);
}
}
else if (req.RequestDuration < NORMAL_SCRIPT_TIME)
{
if (prio < Amib.Threading.WorkItemPriority.Normal)
{
prio++;
SetObjectPriority(req.SogID, prio);
}
}
else
{
//just ping the timestamp if it exists
UpdatePriorityTimestamp(req.SogID);
}
//also if this request was low priority, maintain the counts
--m_numLowPriorityQueued;
}
private void ProcessRequest(HttpRequestObject req)
{
req.Process();
lock (m_httpListLock)
{
m_pendingRequests.Remove(req.ReqID);
m_completedRequests.Enqueue(req);
DecrementObjectQueue(req.SogID);
AdjustObjectPriority(req);
MaintainPriorityQueue();
}
}
public UUID StartHttpRequest(UUID sogId, uint localID, UUID itemID, string url, string[] parms, Dictionary<string, string> headers, string body)
{
//if there are already too many requests globally, reject this one
if (RequestQueueFreeSpacePercentage == 0.0f) return UUID.Zero;
// fast exit for the common case of scripter error passing an empty URL
if (url == String.Empty) return UUID.Zero;
if (BlockedByBlacklist(url)) return UUID.Zero;
UUID reqID = UUID.Random();
HttpRequestObject htc = new HttpRequestObject();
// Partial implementation: support for parameter flags needed
// see http://wiki.secondlife.com/wiki/LlHTTPRequest
//
// Parameters are expected in {key, value, ... , key, value}
try
{
int i = 0;
while (i < parms.Length)
{
switch (Int32.Parse(parms[i++]))
{
case (int)HttpRequestConstants.HTTP_METHOD:
// This one was validated to be one of the valid values for method in LSLSystemAPI.cs
htc.HttpMethod = parms[i++];
break;
case (int)HttpRequestConstants.HTTP_MIMETYPE:
htc.HttpMIMEType = parms[i++];
break;
case (int)HttpRequestConstants.HTTP_BODY_MAXLENGTH:
htc.HttpBodyMaxLength = int.Parse(parms[i++]);
break;
case (int)HttpRequestConstants.HTTP_VERIFY_CERT:
htc.HttpVerifyCert = (int.Parse(parms[i++]) != 0);
break;
case (int)HttpRequestConstants.HTTP_VERBOSE_THROTTLE:
htc.HttpVerboseThrottle = (int.Parse(parms[i++]) != 0);
break;
case (int)HttpRequestConstants.HTTP_CUSTOM_HEADER:
string key = parms[i++];
string value = parms[i++];
// Don't overwrite values. Keeps us from clobbering
// The standard X-Secondlife params with user ones.
if (headers.ContainsKey(key) == false)
headers.Add(key, value);
break;
case (int)HttpRequestConstants.HTTP_PRAGMA_NO_CACHE:
// What if there is more than one pragma header defined?
bool noCache = (int.Parse(parms[i++]) != 0);
if (noCache == true)
headers.Add("Pragma", "no-cache");
else if (headers.ContainsKey("Pragma"))
headers.Remove("Pragma");
break;
default:
// Invalid Parameter Type. Log an error?
// Fail the request by returning a Null Key
return UUID.Zero;
}
}
}
catch (System.IndexOutOfRangeException)
{
// They passed us junk, we stepped past the end of the array.
// We'll fail the request by returning a NULL_KEY
return UUID.Zero;
}
if (m_debugLevel >= 1)
MainConsole.Instance.OutputFormat("httprequest: LocalID={0} URL={1}", localID, url);
htc.LocalID = localID;
htc.ItemID = itemID;
htc.SogID = sogId;
htc.Url = url;
htc.ReqID = reqID;
htc.HttpTimeout = HTTP_TIMEOUT;
htc.OutboundBody = body;
htc.ResponseHeaders = headers;
htc.proxyurl = m_proxyurl;
htc.proxyexcepts = m_proxyexcepts;
Amib.Threading.WorkItemPriority prio;
lock (m_httpListLock)
{
//if there are already too many requests for this script running, reject this one
if (!TryIncrementObjectQueue(sogId))
{
return UUID.Zero;
}
prio = GetObjectPriority(sogId);
if (prio == Amib.Threading.WorkItemPriority.Lowest)
{
if (m_numLowPriorityQueued < MAX_SLOW_REQUEST_QUEUE_SIZE)
{
htc.IsLowPriority = true;
++m_numLowPriorityQueued;
}
else
{
return UUID.Zero;
}
}
m_pendingRequests.Add(reqID, htc);
}
if (prio > Amib.Threading.WorkItemPriority.Lowest)
{
_threadPool.QueueWorkItem(() => this.ProcessRequest(htc));
}
else
{
_slowPool.QueueWorkItem(() => this.ProcessRequest(htc));
}
return reqID;
}
