93 lines
3.0 KiB
C#
93 lines
3.0 KiB
C#
// Copyright (c) .NET Foundation. All rights reserved.
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// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
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using System;
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using System.Collections.Generic;
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using System.Threading.Tasks;
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using Microsoft.AspNetCore.Routing.Template;
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using Microsoft.Extensions.Options;
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namespace Microsoft.AspNetCore.Routing.Matchers
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{
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internal class RouteMatcherBuilder : MatcherBuilder
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{
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private readonly IInlineConstraintResolver _constraintResolver;
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private readonly List<Entry> _entries;
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public RouteMatcherBuilder()
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{
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_constraintResolver = new DefaultInlineConstraintResolver(Options.Create(new RouteOptions()));
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_entries = new List<Entry>();
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}
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public override void AddEndpoint(MatcherEndpoint endpoint)
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{
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var handler = new RouteHandler(c =>
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{
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c.Features.Get<IEndpointFeature>().Endpoint = endpoint;
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return Task.CompletedTask;
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});
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// MatcherEndpoint.Values contains the default values parsed from the template
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// as well as those specified with a literal. We need to separate those
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// for legacy cases.
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var defaults = endpoint.Defaults;
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for (var i = 0; i < endpoint.ParsedTemplate.Parameters.Count; i++)
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{
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var parameter = endpoint.ParsedTemplate.Parameters[i];
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if (parameter.DefaultValue != null)
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{
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defaults.Remove(parameter.Name);
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}
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}
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_entries.Add(new Entry()
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{
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Endpoint = endpoint,
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Route = new Route(
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handler,
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endpoint.Template,
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defaults,
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new Dictionary<string, object>(),
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new RouteValueDictionary(),
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_constraintResolver),
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});
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}
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public override Matcher Build()
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{
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_entries.Sort();
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var routes = new RouteCollection();
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for (var i = 0; i < _entries.Count; i++)
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{
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routes.Add(_entries[i].Route);
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}
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return new RouteMatcher(routes);
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}
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private struct Entry : IComparable<Entry>
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{
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public MatcherEndpoint Endpoint;
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public Route Route;
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public int CompareTo(Entry other)
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{
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var comparison = Endpoint.Order.CompareTo(other.Endpoint.Order);
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if (comparison != 0)
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{
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return comparison;
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}
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comparison = RoutePrecedence.ComputeInbound(Endpoint.ParsedTemplate).CompareTo(RoutePrecedence.ComputeInbound(other.Endpoint.ParsedTemplate));
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if (comparison != 0)
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{
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return comparison;
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}
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return Endpoint.Template.CompareTo(other.Endpoint.Template);
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}
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}
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}
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}
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