public override async Task Invoke(IOwinContext context)
{
var isPushEnabled = context.Get <bool>(CommonOwinKeys.EnableServerPush);
//If push is not allowed then pass to then next layer
if (!isPushEnabled)
{
await Next.Invoke(context);
return;
}
bool gotError = false;
var refTree = context.Get <Dictionary <string, string[]> >(CommonOwinKeys.AdditionalInfo);
//original request from client
if (refTree == null)
{
string root = context.Request.Path.Value;
if (!_references.ContainsKey(root))
{
gotError = true; // Cant build tree because no such name in the ref table. Should invoke next
}
else
{
var refCpy = new ReferenceTable(_references);
var tree = new GraphHelper().BuildTree(refCpy, root);
refTree = tree;
context.Set(CommonOwinKeys.AdditionalInfo, tree);
}
}
if (!gotError)
{
PushFunc pushPromise;
string[] pushReferences;
if (refTree.TryGetValue(context.Request.Path.Value, out pushReferences) &&
TryGetPushPromise(context, out pushPromise))
{
foreach (var pushReference in pushReferences)
{
Push(context.Request, pushPromise, pushReference);
}
}
}
context.Set(CommonOwinKeys.AddVertex, new AddVertFunc(AddVertex));
context.Set(CommonOwinKeys.RemoveVertex, new RemoveVertFunc(RemoveVertex));
await Next.Invoke(context);
}
private void Dfs(ReferenceTable table, string root)
{
_used[root] = true;
var nonused = new List<string>(8);
foreach (var child in table[root])
{
if (!_used[child])
{
nonused.Add(child);
Dfs(table, child);
}
}
_tree.Add(root, nonused.ToArray());
}
private void Dfs(ReferenceTable table, string root)
{
_used[root] = true;
var nonused = new List <string>(8);
foreach (var child in table[root])
{
if (!_used[child])
{
nonused.Add(child);
Dfs(table, child);
}
}
_tree.Add(root, nonused.ToArray());
}
public Dictionary<string, string[]> BuildTree(ReferenceTable table, string root)
{
if (!table.ContainsKey(root))
throw new Exception("No such key. Should invoke next.");
_used.Clear();
_tree.Clear();
foreach (var key in table.Keys)
{
_used.Add(key, false);
}
Dfs(table, root);
return _tree;
}
public Dictionary <string, string[]> BuildTree(ReferenceTable table, string root)
{
if (!table.ContainsKey(root))
{
throw new Exception("No such key. Should invoke next.");
}
_used.Clear();
_tree.Clear();
foreach (var key in table.Keys)
{
_used.Add(key, false);
}
Dfs(table, root);
return(_tree);
}
public ReferenceTable(ReferenceTable table)
{
_collection = new Dictionary <string, string[]>(table._collection, StringComparer.OrdinalIgnoreCase);
}
public ReferenceTable(ReferenceTable table)
{
_collection = new Dictionary<string, string[]>(table._collection, StringComparer.OrdinalIgnoreCase);
}
public PushMiddleware(OwinMiddleware next)
: base(next)
{
_references = new ReferenceTable(new Dictionary <string, string[]>(StringComparer.OrdinalIgnoreCase)
{
{
"/root/index.html", new[]
{
"/root/simpleTest.txt"
}
},
{
"/root/simpleTest.txt", new string[0]
},
{
"/root/LookAround.htm", new []
{
"/root/LookAround_files/BaseStyles.css",
"/root/LookAround_files/Demo.css",
"/root/LookAround_files/DemoTemplate.css",
"/root/LookAround_files/FavIcon.ico",
"/root/LookAround_files/ie-logo.png",
"/root/LookAround_files/instructions.png",
"/root/LookAround_files/loading.gif",
"/root/LookAround_files/negx.jpg",
"/root/LookAround_files/negy.jpg",
"/root/LookAround_files/negz.jpg",
"/root/LookAround_files/posx.jpg",
"/root/LookAround_files/posy.jpg",
"/root/LookAround_files/posz.jpg",
"/root/LookAround_files/ReturnAndShareControls.css",
"/root/LookAround_files/ReturnAndShareControls.js",
"/root/LookAround_files/ReturnButtonImageStrip.png",
"/root/LookAround_files/TestDriveCommon.js",
"/root/LookAround_files/three.min.js",
}
},
{
"/root/LookAround_files/BaseStyles.css", new string[0]
},
{
"/root/LookAround_files/Demo.css", new string[0]
},
{
"/root/LookAround_files/DemoTemplate.css", new string[0]
},
{
"/root/LookAround_files/FavIcon.ico", new string[0]
},
{
"/root/LookAround_files/ie-logo.png", new string[0]
},
{
"/root/LookAround_files/instructions.png", new string[0]
},
{
"/root/LookAround_files/loading.gif", new string[0]
},
{
"/root/LookAround_files/negx.jpg", new string[0]
},
{
"/root/LookAround_files/negy.jpg", new string[0]
},
{
"/root/LookAround_files/negz.jpg", new string[0]
},
{
"/root/LookAround_files/posx.jpg", new string[0]
},
{
"/root/LookAround_files/posy.jpg", new string[0]
},
{
"/root/LookAround_files/posz.jpg", new string[0]
},
{
"/root/LookAround_files/ReturnAndShareControls.css", new string[0]
},
{
"/root/LookAround_files/ReturnAndShareControls.js", new string[0]
},
{
"/root/LookAround_files/ReturnButtonImageStrip.png", new string[0]
},
{
"/root/LookAround_files/TestDriveCommon.js", new string[0]
},
{
"/root/LookAround_files/three.min.js", new string[0]
},
});
}
public Dictionary <string, string[]> BuildTree(ReferenceTable table, string root)
{
return(new TreeBuilder().BuildTree(table, root));
}
public Dictionary<string, string[]> BuildTree(ReferenceTable table, string root)
{
return new TreeBuilder().BuildTree(table, root);
}
public PushMiddleware(OwinMiddleware next)
: base(next)
{
_references = new ReferenceTable(new Dictionary<string, string[]>(StringComparer.OrdinalIgnoreCase)
{
{
"/root/index.html", new[]
{
"/root/simpleTest.txt"
}
},
{
"/root/simpleTest.txt", new string[0]
},
{
"/root/LookAround.htm", new []
{
"/root/LookAround_files/BaseStyles.css",
"/root/LookAround_files/Demo.css",
"/root/LookAround_files/DemoTemplate.css",
"/root/LookAround_files/FavIcon.ico",
"/root/LookAround_files/ie-logo.png",
"/root/LookAround_files/instructions.png",
"/root/LookAround_files/loading.gif",
"/root/LookAround_files/negx.jpg",
"/root/LookAround_files/negy.jpg",
"/root/LookAround_files/negz.jpg",
"/root/LookAround_files/posx.jpg",
"/root/LookAround_files/posy.jpg",
"/root/LookAround_files/posz.jpg",
"/root/LookAround_files/ReturnAndShareControls.css",
"/root/LookAround_files/ReturnAndShareControls.js",
"/root/LookAround_files/ReturnButtonImageStrip.png",
"/root/LookAround_files/TestDriveCommon.js",
"/root/LookAround_files/three.min.js",
}
},
{
"/root/LookAround_files/BaseStyles.css", new string[0]
},
{
"/root/LookAround_files/Demo.css", new string[0]
},
{
"/root/LookAround_files/DemoTemplate.css", new string[0]
},
{
"/root/LookAround_files/FavIcon.ico", new string[0]
},
{
"/root/LookAround_files/ie-logo.png", new string[0]
},
{
"/root/LookAround_files/instructions.png", new string[0]
},
{
"/root/LookAround_files/loading.gif", new string[0]
},
{
"/root/LookAround_files/negx.jpg", new string[0]
},
{
"/root/LookAround_files/negy.jpg", new string[0]
},
{
"/root/LookAround_files/negz.jpg", new string[0]
},
{
"/root/LookAround_files/posx.jpg", new string[0]
},
{
"/root/LookAround_files/posy.jpg", new string[0]
},
{
"/root/LookAround_files/posz.jpg", new string[0]
},
{
"/root/LookAround_files/ReturnAndShareControls.css", new string[0]
},
{
"/root/LookAround_files/ReturnAndShareControls.js", new string[0]
},
{
"/root/LookAround_files/ReturnButtonImageStrip.png", new string[0]
},
{
"/root/LookAround_files/TestDriveCommon.js", new string[0]
},
{
"/root/LookAround_files/three.min.js", new string[0]
},
});
}
public override async Task Invoke(IOwinContext context)
{
var isPushEnabled = context.Get<bool>(CommonOwinKeys.EnableServerPush);
//If push is not allowed then pass to then next layer
if (!isPushEnabled)
{
await Next.Invoke(context);
return;
}
bool gotError = false;
var refTree = context.Get<Dictionary<string, string[]>>(CommonOwinKeys.AdditionalInfo);
//original request from client
if (refTree == null)
{
string root = context.Request.Path.Value;
if (!_references.ContainsKey(root))
{
gotError = true; // Cant build tree because no such name in the ref table. Should invoke next
}
else
{
var refCpy = new ReferenceTable(_references);
var tree = new GraphHelper().BuildTree(refCpy, root);
refTree = tree;
context.Set(CommonOwinKeys.AdditionalInfo, tree);
}
}
if (!gotError)
{
PushFunc pushPromise;
string[] pushReferences;
if (refTree.TryGetValue(context.Request.Path.Value, out pushReferences)
&& TryGetPushPromise(context, out pushPromise))
{
foreach (var pushReference in pushReferences)
{
Push(context.Request, pushPromise, pushReference);
}
}
}
context.Set(CommonOwinKeys.AddVertex, new AddVertFunc(AddVertex));
context.Set(CommonOwinKeys.RemoveVertex, new RemoveVertFunc(RemoveVertex));
await Next.Invoke(context);
}
