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304 lines (267 loc) · 12.1 KB
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// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Diagnostics.CodeAnalysis;
using System.Diagnostics.Contracts;
using System.Linq;
using System.Net.Http;
using System.Net.Http.Formatting;
using System.Web.Http.Controllers;
using System.Web.Http.Dependencies;
using System.Web.Http.Filters;
using System.Web.Http.Metadata;
using System.Web.Http.ModelBinding;
using System.Web.Http.Services;
using System.Web.Http.Tracing;
using System.Web.Http.Validation;
namespace System.Web.Http
{
/// <summary>
/// Configuration of <see cref="HttpServer"/> instances.
/// </summary>
public class HttpConfiguration : IDisposable
{
private readonly HttpRouteCollection _routes;
private readonly ConcurrentDictionary<object, object> _properties = new ConcurrentDictionary<object, object>();
private readonly MediaTypeFormatterCollection _formatters;
private readonly Collection<DelegatingHandler> _messageHandlers = new Collection<DelegatingHandler>();
private readonly HttpFilterCollection _filters = new HttpFilterCollection();
private IDependencyResolver _dependencyResolver = EmptyResolver.Instance;
private Action<HttpConfiguration> _initializer = DefaultInitializer;
private bool _initialized;
private bool _disposed;
/// <summary>
/// Initializes a new instance of the <see cref="HttpConfiguration"/> class.
/// </summary>
[SuppressMessage("Microsoft.Reliability", "CA2000:Dispose objects before losing scope",
Justification = "The route collection is disposed as part of this class.")]
public HttpConfiguration()
: this(new HttpRouteCollection(String.Empty))
{
}
/// <summary>
/// Initializes a new instance of the <see cref="HttpConfiguration"/> class.
/// </summary>
/// <param name="routes">The <see cref="HttpRouteCollection"/> to associate with this instance.</param>
public HttpConfiguration(HttpRouteCollection routes)
{
if (routes == null)
{
throw Error.ArgumentNull("routes");
}
_routes = routes;
_formatters = DefaultFormatters(this);
Services = new DefaultServices(this);
ParameterBindingRules = DefaultActionValueBinder.GetDefaultParameterBinders();
}
private HttpConfiguration(HttpConfiguration configuration, HttpControllerSettings settings)
{
_routes = configuration.Routes;
_filters = configuration.Filters;
_messageHandlers = configuration.MessageHandlers;
_properties = configuration.Properties;
_dependencyResolver = configuration.DependencyResolver;
IncludeErrorDetailPolicy = configuration.IncludeErrorDetailPolicy;
// per-controller settings
Services = settings.IsServiceCollectionInitialized ? settings.Services : configuration.Services;
_formatters = settings.IsFormatterCollectionInitialized ? settings.Formatters : configuration.Formatters;
ParameterBindingRules = settings.IsParameterBindingRuleCollectionInitialized ? settings.ParameterBindingRules : configuration.ParameterBindingRules;
// Use the original configuration's initializer so that its Initialize()
// will perform the same logic on this clone as on the original.
Initializer = configuration.Initializer;
// create a new validator cache if the validator providers have changed
if (settings.IsServiceCollectionInitialized &&
!settings.Services.GetModelValidatorProviders().SequenceEqual(configuration.Services.GetModelValidatorProviders()))
{
ModelValidatorCache validatorCache = new ModelValidatorCache(new Lazy<IEnumerable<ModelValidatorProvider>>(() => Services.GetModelValidatorProviders()));
settings.Services.Replace(typeof(IModelValidatorCache), validatorCache);
}
}
/// <summary>
/// Gets or sets the action that will perform final initialization
/// of the <see cref="HttpConfiguration"/> instance before it is used
/// to process requests.
/// </summary>
/// <remarks>The Action returned by this property will be called to perform
/// final initialization of an <see cref="HttpConfiguration"/> before it is
/// used to process a request.
/// <para>
/// The <see cref="HttpConfiguration"/> passed to this action should be
/// considered immutable after the action returns.
/// </para>
/// </remarks>
public Action<HttpConfiguration> Initializer
{
get
{
return _initializer;
}
set
{
if (value == null)
{
throw Error.ArgumentNull("value");
}
_initializer = value;
}
}
/// <summary>
/// Gets the list of filters that apply to all requests served using this HttpConfiguration instance.
/// </summary>
public HttpFilterCollection Filters
{
get { return _filters; }
}
/// <summary>
/// Gets an ordered list of <see cref="DelegatingHandler"/> instances to be invoked as an
/// <see cref="HttpRequestMessage"/> travels up the stack and an <see cref="HttpResponseMessage"/> travels down in
/// stack in return. The handlers are invoked in a top-down fashion in the incoming path and bottom-up in the outgoing
/// path. That is, the first entry is invoked first for an incoming request message but last for an outgoing
/// response message.
/// </summary>
/// <value>
/// The message handler collection.
/// </value>
public Collection<DelegatingHandler> MessageHandlers
{
get { return _messageHandlers; }
}
/// <summary>
/// Gets the <see cref="HttpRouteCollection"/> associated with this <see cref="HttpServer"/> instance.
/// </summary>
/// <value>
/// The <see cref="HttpRouteCollection"/>.
/// </value>
public HttpRouteCollection Routes
{
get { return _routes; }
}
/// <summary>
/// Gets the properties associated with this instance.
/// </summary>
public ConcurrentDictionary<object, object> Properties
{
get { return _properties; }
}
/// <summary>
/// Gets the root virtual path. The <see cref="VirtualPathRoot"/> property always returns
/// "/" as the first character of the returned value.
/// </summary>
public string VirtualPathRoot
{
get { return _routes.VirtualPathRoot; }
}
/// <summary>
/// Gets or sets the dependency resolver associated with this <see cref="HttpConfiguration"/>.
/// </summary>
public IDependencyResolver DependencyResolver
{
get { return _dependencyResolver; }
set
{
if (value == null)
{
throw Error.PropertyNull();
}
_dependencyResolver = value;
}
}
/// <summary>
/// Gets the container of default services associated with this <see cref="HttpConfiguration"/>.
/// Only supports the list of service types documented on <see cref="DefaultServices"/>. For general
/// purpose types, please use <see cref="DependencyResolver"/>.
/// </summary>
public ServicesContainer Services { get; internal set; }
/// <summary>
/// Top level hook for how parameters should be bound.
/// This should be respected by the IActionValueBinder. If a parameter is not claimed by the list, the IActionValueBinder still binds it.
/// </summary>
public ParameterBindingRulesCollection ParameterBindingRules { get; internal set; }
/// <summary>
/// Gets or sets a value indicating whether error details should be included in error messages.
/// </summary>
public IncludeErrorDetailPolicy IncludeErrorDetailPolicy { get; set; }
/// <summary>
/// Gets the media type formatters.
/// </summary>
public MediaTypeFormatterCollection Formatters
{
get { return _formatters; }
}
private static MediaTypeFormatterCollection DefaultFormatters(HttpConfiguration config)
{
var formatters = new MediaTypeFormatterCollection();
// Basic FormUrlFormatter does not support binding to a T.
// Use our JQuery formatter instead.
formatters.Add(new JQueryMvcFormUrlEncodedFormatter(config));
return formatters;
}
[SuppressMessage("Microsoft.Reliability", "CA2000:Dispose objects before losing scope", Justification = "Caller owns the disposable object")]
internal static HttpConfiguration ApplyControllerSettings(HttpControllerSettings settings, HttpConfiguration configuration)
{
if (!settings.IsFormatterCollectionInitialized && !settings.IsParameterBindingRuleCollectionInitialized && !settings.IsServiceCollectionInitialized)
{
return configuration;
}
// Create a clone of the original configuration, including its initialization rules.
// Invoking Initialize therefore initializes the cloned config the same way as the original.
HttpConfiguration newConfiguration = new HttpConfiguration(configuration, settings);
newConfiguration.Initializer(newConfiguration);
return newConfiguration;
}
private static void DefaultInitializer(HttpConfiguration configuration)
{
// Register the default IRequiredMemberSelector for formatters that haven't been assigned one
ModelMetadataProvider metadataProvider = configuration.Services.GetModelMetadataProvider();
IEnumerable<ModelValidatorProvider> validatorProviders = configuration.Services.GetModelValidatorProviders();
IRequiredMemberSelector defaultRequiredMemberSelector = new ModelValidationRequiredMemberSelector(metadataProvider, validatorProviders);
foreach (MediaTypeFormatter formatter in configuration.Formatters)
{
if (formatter.RequiredMemberSelector == null)
{
formatter.RequiredMemberSelector = defaultRequiredMemberSelector;
}
}
// Initialize the tracing layer.
// This must be the last initialization code to execute
// because it alters the configuration and expects no
// further changes. As a default service, we know it
// must be present.
ITraceManager traceManager = configuration.Services.GetTraceManager();
Contract.Assert(traceManager != null);
traceManager.Initialize(configuration);
}
/// <summary>
/// Invoke the Intializer hook. It is considered immutable from this point forward.
/// It's safe to call this multiple times.
/// </summary>
public void EnsureInitialized()
{
if (_initialized)
{
return;
}
_initialized = true;
Initializer(this);
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
protected virtual void Dispose(bool disposing)
{
if (!_disposed)
{
_disposed = true;
if (disposing)
{
_routes.Dispose();
DependencyResolver.Dispose();
}
}
}
}
}
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