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Merge branch 'master' into careminster

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Conflicts:
	OpenSim/Capabilities/Handlers/GetTexture/GetTextureHandler.cs
	OpenSim/Framework/Servers/VersionInfo.cs
This commit is contained in:
Melanie
2012-09-07 19:49:46 +01:00
parent 72d20b794a 717b11856e
commit 924df14c5e
29 changed files with 686 additions and 75 deletions
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36
OpenSim/Capabilities/Handlers/GetTexture/GetTextureHandler.cs
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@@ -163,7 +163,7 @@ namespace OpenSim.Capabilities.Handlers
if (texture == null)
{
//m_log.DebugFormat("[GETTEXTURE]: texture was not in the cache");
// m_log.DebugFormat("[GETTEXTURE]: texture was not in the cache");
// Fetch locally or remotely. Misses return a 404
texture = m_assetService.Get(textureID.ToString());
@@ -197,7 +197,7 @@ namespace OpenSim.Capabilities.Handlers
}
else // it was on the cache
{
//m_log.DebugFormat("[GETTEXTURE]: texture was in the cache");
// m_log.DebugFormat("[GETTEXTURE]: texture was in the cache");
WriteTextureData(httpRequest, httpResponse, texture, format);
return true;
}
@@ -219,14 +219,30 @@ namespace OpenSim.Capabilities.Handlers
int start, end;
if (TryParseRange(range, out start, out end))
{
// Before clamping start make sure we can satisfy it in order to avoid
// sending back the last byte instead of an error status
if (start >= texture.Data.Length)
{
// m_log.DebugFormat(
// "[GETTEXTURE]: Client requested range for texture {0} starting at {1} but texture has end of {2}",
// texture.ID, start, texture.Data.Length);
// Stricly speaking, as per http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html, we should be sending back
// Requested Range Not Satisfiable (416) here. However, it appears that at least recent implementations
// of the Linden Lab viewer (3.2.1 and 3.3.4 and probably earlier), a viewer that has previously
// received a very small texture may attempt to fetch bytes from the server past the
// range of data that it received originally. Whether this happens appears to depend on whether
// the viewer's estimation of how large a request it needs to make for certain discard levels
// (http://wiki.secondlife.com/wiki/Image_System#Discard_Level_and_Mip_Mapping), chiefly discard
// level 2. If this estimate is greater than the total texture size, returning a RequestedRangeNotSatisfiable
// here will cause the viewer to treat the texture as bad and never display the full resolution
// However, if we return PartialContent (or OK) instead, the viewer will display that resolution.
// 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.AddHeader("Content-Range", String.Format("bytes */{0}", texture.Data.Length));
// response.StatusCode = (int)System.Net.HttpStatusCode.OK;
response.StatusCode = (int)System.Net.HttpStatusCode.PartialContent;
response.ContentType = texture.Metadata.ContentType;
}
else
{
@@ -234,12 +250,18 @@ namespace OpenSim.Capabilities.Handlers
start = Utils.Clamp(start, 0, end);
int len = end - start + 1;
//m_log.Debug("Serving " + start + " to " + end + " of " + texture.Data.Length + " bytes for texture " + texture.ID);
// m_log.Debug("Serving " + start + " to " + end + " of " + texture.Data.Length + " bytes for texture " + texture.ID);
// Always return PartialContent, even if the range covered the entire data length
// 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.
//
// We also do not want to send back OK even if the whole range was satisfiable since this causes
// HTTP textures on at least Imprudence 1.4.0-beta2 to never display the final texture quality.
// if (end > maxEnd)
// response.StatusCode = (int)System.Net.HttpStatusCode.OK;
// else
response.StatusCode = (int)System.Net.HttpStatusCode.PartialContent;
response.ContentLength = len;
@@ -368,4 +390,4 @@ namespace OpenSim.Capabilities.Handlers
return null;
}
}
}
}