public unsafe void Implementation()
{
var path = Input;
var segments = stackalloc PathSegment[MaxCount];
FastPathTokenizer.Tokenize(path, segments, MaxCount);
}
public unsafe override Task MatchAsync(HttpContext httpContext, IEndpointFeature feature)
{
if (httpContext == null)
{
throw new ArgumentNullException(nameof(httpContext));
}
if (feature == null)
{
throw new ArgumentNullException(nameof(feature));
}
var states = _states;
var current = 0;
var path = httpContext.Request.Path.Value;
var buffer = stackalloc PathSegment[32];
var count = FastPathTokenizer.Tokenize(path, buffer, 32);
for (var i = 0; i < count; i++)
{
current = states[current].Transitions.GetDestination(buffer, i, path);
}
var matches = new List <(Endpoint, RouteValueDictionary)>();
var candidates = states[current].Matches;
for (var i = 0; i < candidates.Length; i++)
{
var values = new RouteValueDictionary();
var parameters = candidates[i].Parameters;
if (parameters != null)
{
for (var j = 0; j < parameters.Length; j++)
{
var parameter = parameters[j];
if (parameter != null && buffer[j].Length == 0)
{
goto notmatch;
}
else if (parameter != null)
{
var value = path.Substring(buffer[j].Start, buffer[j].Length);
values.Add(parameter, value);
}
}
}
matches.Add((candidates[i].Endpoint, values));
notmatch :;
}
feature.Endpoint = matches.Count == 0 ? null : matches[0].Item1;
feature.Values = matches.Count == 0 ? null : matches[0].Item2;
return(Task.CompletedTask);
}
[Fact] // Note: tokenizing a truly empty string is undefined.
public void Tokenize_EmptyPath()
{
// Arrange
var segments = stackalloc PathSegment[32];
// Act
var count = FastPathTokenizer.Tokenize("/", segments, 1);
// Assert
Assert.Equal(0, count);
}
public void Tokenize_SingleSegment()
{
// Arrange
var segments = stackalloc PathSegment[32];
// Act
var count = FastPathTokenizer.Tokenize("/abc", segments, 1);
// Assert
Assert.Equal(1, count);
Assert.Equal(new PathSegment(1, 3), segments[0]);
}
public void Tokenize_EmptySegments()
{
// Arrange
var segments = stackalloc PathSegment[32];
// Act
var count = FastPathTokenizer.Tokenize("///c", segments, 3);
// Assert
Assert.Equal(3, count);
Assert.Equal(new PathSegment(1, 0), segments[0]);
Assert.Equal(new PathSegment(2, 0), segments[1]);
Assert.Equal(new PathSegment(3, 1), segments[2]);
}
public void Tokenize_LongerSegments()
{
// Arrange
var segments = stackalloc PathSegment[32];
// Act
var count = FastPathTokenizer.Tokenize("/aaa/bb/ccccc", segments, 3);
// Assert
Assert.Equal(3, count);
Assert.Equal(new PathSegment(1, 3), segments[0]);
Assert.Equal(new PathSegment(5, 2), segments[1]);
Assert.Equal(new PathSegment(8, 5), segments[2]);
}
[Fact] // Empty trailing / is ignored
public void Tokenize_WithSomeSegments_TrailingSlash()
{
// Arrange
var segments = stackalloc PathSegment[32];
// Act
var count = FastPathTokenizer.Tokenize("/a/b/c/", segments, 3);
// Assert
Assert.Equal(3, count);
Assert.Equal(new PathSegment(1, 1), segments[0]);
Assert.Equal(new PathSegment(3, 1), segments[1]);
Assert.Equal(new PathSegment(5, 1), segments[2]);
}
public void Tokenize_TooManySegments()
{
// Arrange
var segments = stackalloc PathSegment[32];
// Act
var count = FastPathTokenizer.Tokenize("/a/b/c/d", segments, 3);
// Assert
Assert.Equal(3, count);
Assert.Equal(new PathSegment(1, 1), segments[0]);
Assert.Equal(new PathSegment(3, 1), segments[1]);
Assert.Equal(new PathSegment(5, 1), segments[2]);
}
public unsafe override Task MatchAsync(HttpContext httpContext, IEndpointFeature feature)
{
if (httpContext == null)
{
throw new ArgumentNullException(nameof(httpContext));
}
if (feature == null)
{
throw new ArgumentNullException(nameof(feature));
}
var state = _state;
var path = httpContext.Request.Path.Value;
var buffer = stackalloc PathSegment[32];
var count = FastPathTokenizer.Tokenize(path, buffer, 32);
var i = 0;
var candidates = new List <Candidate>();
while (i < state.Instructions.Length)
{
var instruction = state.Instructions[i];
switch (instruction.Code)
{
case InstructionCode.Accept:
{
if (count == instruction.Depth)
{
candidates.Add(state.Candidates[instruction.Payload]);
}
i++;
break;
}
case InstructionCode.Branch:
{
var table = state.Tables[instruction.Payload];
i = table.GetDestination(buffer, count, path);
break;
}
case InstructionCode.Jump:
{
i = instruction.Payload;
break;
}
}
}
var matches = new List <(Endpoint, RouteValueDictionary)>();
for (i = 0; i < candidates.Count; i++)
{
var values = new RouteValueDictionary();
var parameters = candidates[i].Parameters;
if (parameters != null)
{
for (var j = 0; j < parameters.Length; j++)
{
var parameter = parameters[j];
if (parameter != null && buffer[j].Length == 0)
{
goto notmatch;
}
else if (parameter != null)
{
var value = path.Substring(buffer[j].Start, buffer[j].Length);
values.Add(parameter, value);
}
}
}
matches.Add((candidates[i].Endpoint, values));
notmatch :;
}
feature.Endpoint = matches.Count == 0 ? null : matches[0].Item1;
feature.Values = matches.Count == 0 ? null : matches[0].Item2;
return(Task.CompletedTask);
}
