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Added OpenSim.Capabilities.Handlers. For the moment it has only the GetTexture handler. The region module in Linden space uses it. WARNING: nothing of this works yet, it just compiles.

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This commit is contained in:
Diva Canto
2011-05-01 09:08:18 -07:00
parent e3c27d8527
commit 6b2b036387
4 changed files with 476 additions and 314 deletions
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315
OpenSim/Region/ClientStack/Linden/Caps/GetTextureModule.cs
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@@ -46,30 +46,10 @@ using OpenSim.Region.Framework.Interfaces;
using OpenSim.Region.Framework.Scenes;
using OpenSim.Services.Interfaces;
using Caps = OpenSim.Framework.Capabilities.Caps;
using OpenSim.Capabilities.Handlers;
namespace OpenSim.Region.ClientStack.Linden
{
#region Stream Handler
public delegate byte[] StreamHandlerCallback(string path, Stream request, OSHttpRequest httpRequest, OSHttpResponse httpResponse);
public class StreamHandler : BaseStreamHandler
{
StreamHandlerCallback m_callback;
public StreamHandler(string httpMethod, string path, StreamHandlerCallback callback)
: base(httpMethod, path)
{
m_callback = callback;
}
public override byte[] Handle(string path, Stream request, OSHttpRequest httpRequest, OSHttpResponse httpResponse)
{
return m_callback(path, request, httpRequest, httpResponse);
}
}
#endregion Stream Handler
[Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule")]
public class GetTextureModule : IRegionModule
@@ -107,298 +87,11 @@ namespace OpenSim.Region.ClientStack.Linden
{
UUID capID = UUID.Random();
// m_log.InfoFormat("[GETTEXTURE]: /CAPS/{0} in region {1}", capID, m_scene.RegionInfo.RegionName);
caps.RegisterHandler("GetTexture", new StreamHandler("GET", "/CAPS/" + capID, ProcessGetTexture));
// m_log.InfoFormat("[GETTEXTURE]: /CAPS/{0} in region {1}", capID, m_scene.RegionInfo.RegionName);
//caps.RegisterHandler("GetTexture", new StreamHandler("GET", "/CAPS/" + capID, ProcessGetTexture));
caps.RegisterHandler("GetTexture", new GetTextureHandler("/CAPS/" + capID + "/", m_assetService));
}
#endregion
private byte[] ProcessGetTexture(string path, Stream request, OSHttpRequest httpRequest, OSHttpResponse httpResponse)
{
//m_log.DebugFormat("[GETTEXTURE]: called in {0}", m_scene.RegionInfo.RegionName);
// 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");
if (m_assetService == null)
{
m_log.Error("[GETTEXTURE]: Cannot fetch texture " + textureStr + " without an asset service");
httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound;
return null;
}
UUID textureID;
if (!String.IsNullOrEmpty(textureStr) && UUID.TryParse(textureStr, out textureID))
{
string[] formats;
if (format != null && format != string.Empty)
{
formats = new string[1] { format.ToLower() };
}
else
{
formats = WebUtil.GetPreferredImageTypes(httpRequest.Headers.Get("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))
break;
}
}
else
{
m_log.Warn("[GETTEXTURE]: Failed to parse a texture_id from GetTexture request: " + httpRequest.Url);
}
httpResponse.Send();
return null;
}
/// <summary>
///
/// </summary>
/// <param name="httpRequest"></param>
/// <param name="httpResponse"></param>
/// <param name="textureID"></param>
/// <param name="format"></param>
/// <returns>False for "caller try another codec"; true otherwise</returns>
private bool FetchTexture(OSHttpRequest httpRequest, OSHttpResponse httpResponse, UUID textureID, string format)
{
// m_log.DebugFormat("[GETTEXTURE]: {0} with requested format {1}", textureID, format);
AssetBase texture;
string fullID = textureID.ToString();
if (format != DefaultFormat)
fullID = fullID + "-" + format;
if (!String.IsNullOrEmpty(REDIRECT_URL))
{
// Only try to fetch locally cached textures. Misses are redirected
texture = m_assetService.GetCached(fullID);
if (texture != null)
{
if (texture.Type != (sbyte)AssetType.Texture)
{
httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound;
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)
{
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!
newTexture.Flags = AssetFlags.Collectable;
newTexture.Temporary = true;
m_assetService.Store(newTexture);
WriteTextureData(httpRequest, httpResponse, 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;
}
}
// not found
// m_log.Warn("[GETTEXTURE]: Texture " + textureID + " not found");
httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound;
return true;
}
private void WriteTextureData(OSHttpRequest request, OSHttpResponse response, AssetBase texture, string format)
{
string range = request.Headers.GetOne("Range");
//m_log.DebugFormat("[GETTEXTURE]: Range {0}", range);
if (!String.IsNullOrEmpty(range)) // JP2's only
{
// Range request
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)
{
response.StatusCode = (int)System.Net.HttpStatusCode.RequestedRangeNotSatisfiable;
return;
}
end = Utils.Clamp(end, 0, texture.Data.Length - 1);
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);
if (len < texture.Data.Length)
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.Body.Write(texture.Data, start, len);
}
else
{
m_log.Warn("[GETTEXTURE]: Malformed Range header: " + range);
response.StatusCode = (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;
if (format == DefaultFormat)
response.ContentType = texture.Metadata.ContentType;
else
response.ContentType = "image/" + format;
response.Body.Write(texture.Data, 0, texture.Data.Length);
}
}
private bool TryParseRange(string header, out int start, out int end)
{
if (header.StartsWith("bytes="))
{
string[] rangeValues = header.Substring(6).Split('-');
if (rangeValues.Length == 2)
{
if (Int32.TryParse(rangeValues[0], out start) && Int32.TryParse(rangeValues[1], out end))
return true;
}
}
start = end = 0;
return false;
}
private byte[] ConvertTextureData(AssetBase texture, string format)
{
m_log.DebugFormat("[GETTEXTURE]: Converting texture {0} to {1}", texture.ID, format);
byte[] data = new byte[0];
MemoryStream imgstream = new MemoryStream();
Bitmap mTexture = new Bitmap(1, 1);
ManagedImage managedImage;
Image image = (Image)mTexture;
try
{
// Taking our jpeg2000 data, decoding it, then saving it to a byte array with regular data
imgstream = new MemoryStream();
// Decode image to System.Drawing.Image
if (OpenJPEG.DecodeToImage(texture.Data, out managedImage, out image))
{
// Save to bitmap
mTexture = new Bitmap(image);
EncoderParameters myEncoderParameters = new EncoderParameters();
myEncoderParameters.Param[0] = new EncoderParameter(Encoder.Quality, 95L);
// Save bitmap to stream
ImageCodecInfo codec = GetEncoderInfo("image/" + format);
if (codec != null)
{
mTexture.Save(imgstream, codec, myEncoderParameters);
// Write the stream to a byte array for output
data = imgstream.ToArray();
}
else
m_log.WarnFormat("[GETTEXTURE]: No such codec {0}", format);
}
}
catch (Exception e)
{
m_log.WarnFormat("[GETTEXTURE]: Unable to convert texture {0} to {1}: {2}", texture.ID, format, e.Message);
}
finally
{
// Reclaim memory, these are unmanaged resources
// If we encountered an exception, one or more of these will be null
if (mTexture != null)
mTexture.Dispose();
if (image != null)
image.Dispose();
if (imgstream != null)
{
imgstream.Close();
imgstream.Dispose();
}
}
return data;
}
// From msdn
private static ImageCodecInfo GetEncoderInfo(String mimeType)
{
ImageCodecInfo[] encoders;
encoders = ImageCodecInfo.GetImageEncoders();
for (int j = 0; j < encoders.Length; ++j)
{
if (encoders[j].MimeType == mimeType)
return encoders[j];
}
return null;
}
}
}