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Revamp the HTTP textures handler to allow a maximum of four fetches

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at any time and to drop requests for avatars n longer in the scene
This commit is contained in:
Melanie
2012-09-14 21:24:25 +02:00
parent 9f93bef111
commit 387e59ff7f
7 changed files with 294 additions and 157 deletions
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165
OpenSim/Capabilities/Handlers/GetTexture/GetTextureHandler.cs
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@@ -47,36 +47,36 @@ using Caps = OpenSim.Framework.Capabilities.Caps;
namespace OpenSim.Capabilities.Handlers
{
public class GetTextureHandler : BaseStreamHandler
public class GetTextureHandler
{
private static readonly ILog m_log =
LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
private IAssetService m_assetService;
public const string DefaultFormat = "x-j2c";
// TODO: Change this to a config option
const string REDIRECT_URL = null;
public GetTextureHandler(string path, IAssetService assService, string name, string description)
: base("GET", path, name, description)
public GetTextureHandler(IAssetService assService)
{
m_assetService = assService;
}
public override byte[] Handle(string path, Stream request, IOSHttpRequest httpRequest, IOSHttpResponse httpResponse)
public Hashtable Handle(Hashtable request)
{
// Try to parse the texture ID from the request URL
NameValueCollection query = HttpUtility.ParseQueryString(httpRequest.Url.Query);
string textureStr = query.GetOne("texture_id");
string format = query.GetOne("format");
Hashtable ret = new Hashtable();
ret["int_response_code"] = (int)System.Net.HttpStatusCode.NotFound;
ret["content_type"] = "text/plain";
ret["keepalive"] = false;
ret["reusecontext"] = false;
string textureStr = (string)request["texture_id"];
string format = (string)request["format"];
//m_log.DebugFormat("[GETTEXTURE]: called {0}", textureStr);
if (m_assetService == null)
{
m_log.Error("[GETTEXTURE]: Cannot fetch texture " + textureStr + " without an asset service");
httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound;
}
UUID textureID;
@@ -91,30 +91,30 @@ namespace OpenSim.Capabilities.Handlers
}
else
{
formats = WebUtil.GetPreferredImageTypes(httpRequest.Headers.Get("Accept"));
formats = new string[1] { DefaultFormat }; // default
if (((Hashtable)request["headers"])["Accept"] != null)
formats = WebUtil.GetPreferredImageTypes((string)((Hashtable)request["headers"])["Accept"]);
if (formats.Length == 0)
formats = new string[1] { DefaultFormat }; // default
}
// OK, we have an array with preferred formats, possibly with only one entry
httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound;
foreach (string f in formats)
{
if (FetchTexture(httpRequest, httpResponse, textureID, f))
if (FetchTexture(request, ret, textureID, f))
break;
}
}
else
{
m_log.Warn("[GETTEXTURE]: Failed to parse a texture_id from GetTexture request: " + httpRequest.Url);
m_log.Warn("[GETTEXTURE]: Failed to parse a texture_id from GetTexture request: " + (string)request["uri"]);
}
// m_log.DebugFormat(
// "[GETTEXTURE]: For texture {0} sending back response {1}, data length {2}",
// textureID, httpResponse.StatusCode, httpResponse.ContentLength);
return null;
return ret;
}
/// <summary>
@@ -125,7 +125,7 @@ namespace OpenSim.Capabilities.Handlers
/// <param name="textureID"></param>
/// <param name="format"></param>
/// <returns>False for "caller try another codec"; true otherwise</returns>
private bool FetchTexture(IOSHttpRequest httpRequest, IOSHttpResponse httpResponse, UUID textureID, string format)
private bool FetchTexture(Hashtable request, Hashtable response, UUID textureID, string format)
{
// m_log.DebugFormat("[GETTEXTURE]: {0} with requested format {1}", textureID, format);
AssetBase texture;
@@ -134,84 +134,61 @@ namespace OpenSim.Capabilities.Handlers
if (format != DefaultFormat)
fullID = fullID + "-" + format;
if (!String.IsNullOrEmpty(REDIRECT_URL))
// try the cache
texture = m_assetService.GetCached(fullID);
if (texture == null)
{
// Only try to fetch locally cached textures. Misses are redirected
texture = m_assetService.GetCached(fullID);
//m_log.DebugFormat("[GETTEXTURE]: texture was not in the cache");
// Fetch locally or remotely. Misses return a 404
texture = m_assetService.Get(textureID.ToString());
if (texture != null)
{
if (texture.Type != (sbyte)AssetType.Texture)
return true;
if (format == DefaultFormat)
{
httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound;
WriteTextureData(request, response, texture, format);
return true;
}
WriteTextureData(httpRequest, httpResponse, texture, format);
}
else
{
string textureUrl = REDIRECT_URL + textureID.ToString();
m_log.Debug("[GETTEXTURE]: Redirecting texture request to " + textureUrl);
httpResponse.RedirectLocation = textureUrl;
return true;
}
}
else // no redirect
{
// try the cache
texture = m_assetService.GetCached(fullID);
if (texture == null)
{
//m_log.DebugFormat("[GETTEXTURE]: texture was not in the cache");
// Fetch locally or remotely. Misses return a 404
texture = m_assetService.Get(textureID.ToString());
if (texture != null)
else
{
if (texture.Type != (sbyte)AssetType.Texture)
{
httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound;
return true;
}
if (format == DefaultFormat)
{
WriteTextureData(httpRequest, httpResponse, texture, format);
return true;
}
else
{
AssetBase newTexture = new AssetBase(texture.ID + "-" + format, texture.Name, (sbyte)AssetType.Texture, texture.Metadata.CreatorID);
newTexture.Data = ConvertTextureData(texture, format);
if (newTexture.Data.Length == 0)
return false; // !!! Caller try another codec, please!
AssetBase newTexture = new AssetBase(texture.ID + "-" + format, texture.Name, (sbyte)AssetType.Texture, texture.Metadata.CreatorID);
newTexture.Data = ConvertTextureData(texture, format);
if (newTexture.Data.Length == 0)
return false; // !!! Caller try another codec, please!
newTexture.Flags = AssetFlags.Collectable;
newTexture.Temporary = true;
m_assetService.Store(newTexture);
WriteTextureData(httpRequest, httpResponse, newTexture, format);
return true;
}
newTexture.Flags = AssetFlags.Collectable;
newTexture.Temporary = true;
m_assetService.Store(newTexture);
WriteTextureData(request, response, newTexture, format);
return true;
}
}
else // it was on the cache
{
//m_log.DebugFormat("[GETTEXTURE]: texture was in the cache");
WriteTextureData(httpRequest, httpResponse, texture, format);
return true;
}
}
}
}
else // it was on the cache
{
//m_log.DebugFormat("[GETTEXTURE]: texture was in the cache");
WriteTextureData(request, response, texture, format);
return true;
}
// not found
// m_log.Warn("[GETTEXTURE]: Texture " + textureID + " not found");
httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound;
return true;
}
private void WriteTextureData(IOSHttpRequest request, IOSHttpResponse response, AssetBase texture, string format)
private void WriteTextureData(Hashtable request, Hashtable response, AssetBase texture, string format)
{
string range = request.Headers.GetOne("Range");
Hashtable headers = new Hashtable();
response["headers"] = headers;
string range = String.Empty;
if (((Hashtable)request["headers"])["Range"] != null)
range = (string)((Hashtable)request["headers"])["Range"];
if (!String.IsNullOrEmpty(range)) // JP2's only
{
@@ -226,7 +203,7 @@ namespace OpenSim.Capabilities.Handlers
{
// response.StatusCode = (int)System.Net.HttpStatusCode.RequestedRangeNotSatisfiable;
// viewers don't seem to handle RequestedRangeNotSatisfiable and keep retrying with same parameters
response.StatusCode = (int)System.Net.HttpStatusCode.NotFound;
response["int_response_code"] = (int)System.Net.HttpStatusCode.NotFound;
}
else
{
@@ -240,31 +217,33 @@ namespace OpenSim.Capabilities.Handlers
// We were accidentally sending back 404 before in this situation
// https://issues.apache.org/bugzilla/show_bug.cgi?id=51878 supports sending 206 even if the
// entire range is requested, and viewer 3.2.2 (and very probably earlier) seems fine with this.
response.StatusCode = (int)System.Net.HttpStatusCode.PartialContent;
response.ContentLength = len;
response.ContentType = texture.Metadata.ContentType;
response.AddHeader("Content-Range", String.Format("bytes {0}-{1}/{2}", start, end, texture.Data.Length));
response["int_response_code"] = (int)System.Net.HttpStatusCode.PartialContent;
response["content-type"] = texture.Metadata.ContentType;
headers["Content-Range"] = String.Format("bytes {0}-{1}/{2}", start, end, texture.Data.Length);
response.Body.Write(texture.Data, start, len);
byte[] d = new byte[len];
Array.Copy(texture.Data, start, d, 0, len);
response["bin_response_data"] = d;
// response.Body.Write(texture.Data, start, len);
}
}
else
{
m_log.Warn("[GETTEXTURE]: Malformed Range header: " + range);
response.StatusCode = (int)System.Net.HttpStatusCode.BadRequest;
response["int_response_code"] = (int)System.Net.HttpStatusCode.BadRequest;
}
}
else // JP2's or other formats
{
// Full content request
response.StatusCode = (int)System.Net.HttpStatusCode.OK;
response.ContentLength = texture.Data.Length;
response["int_response_code"] = (int)System.Net.HttpStatusCode.OK;
if (format == DefaultFormat)
response.ContentType = texture.Metadata.ContentType;
response["content_type"] = texture.Metadata.ContentType;
else
response.ContentType = "image/" + format;
response.Body.Write(texture.Data, 0, texture.Data.Length);
response["content_type"] = "image/" + format;
response["bin_response_data"] = texture.Data;
// response.Body.Write(texture.Data, 0, texture.Data.Length);
}
// if (response.StatusCode < 200 || response.StatusCode > 299)
@@ -368,4 +347,4 @@ namespace OpenSim.Capabilities.Handlers
return null;
}
}
}
}