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467 lines
24 KiB
467 lines
24 KiB
using System;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using System.ComponentModel;
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using System.Diagnostics;
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using System.Diagnostics.CodeAnalysis;
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using System.Globalization;
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using System.Linq;
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using System.Net.Http;
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using System.Net.Http.Headers;
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using System.Web.Http;
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using System.Web.Http.Controllers;
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using System.Web.Http.Description;
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using ICSSoft.WebAPI.Areas.HelpPage.ModelDescriptions;
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using ICSSoft.WebAPI.Areas.HelpPage.Models;
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namespace ICSSoft.WebAPI.Areas.HelpPage
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{
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public static class HelpPageConfigurationExtensions
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{
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private const string ApiModelPrefix = "MS_HelpPageApiModel_";
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/// <summary>
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/// Sets the documentation provider for help page.
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/// </summary>
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/// <param name="config">The <see cref="HttpConfiguration"/>.</param>
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/// <param name="documentationProvider">The documentation provider.</param>
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public static void SetDocumentationProvider(this HttpConfiguration config, IDocumentationProvider documentationProvider)
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{
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config.Services.Replace(typeof(IDocumentationProvider), documentationProvider);
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}
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/// <summary>
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/// Sets the objects that will be used by the formatters to produce sample requests/responses.
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/// </summary>
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/// <param name="config">The <see cref="HttpConfiguration"/>.</param>
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/// <param name="sampleObjects">The sample objects.</param>
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public static void SetSampleObjects(this HttpConfiguration config, IDictionary<Type, object> sampleObjects)
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{
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config.GetHelpPageSampleGenerator().SampleObjects = sampleObjects;
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}
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/// <summary>
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/// Sets the sample request directly for the specified media type and action.
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/// </summary>
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/// <param name="config">The <see cref="HttpConfiguration"/>.</param>
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/// <param name="sample">The sample request.</param>
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/// <param name="mediaType">The media type.</param>
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/// <param name="controllerName">Name of the controller.</param>
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/// <param name="actionName">Name of the action.</param>
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public static void SetSampleRequest(this HttpConfiguration config, object sample, MediaTypeHeaderValue mediaType, string controllerName, string actionName)
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{
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config.GetHelpPageSampleGenerator().ActionSamples.Add(new HelpPageSampleKey(mediaType, SampleDirection.Request, controllerName, actionName, new[] { "*" }), sample);
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}
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/// <summary>
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/// Sets the sample request directly for the specified media type and action with parameters.
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/// </summary>
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/// <param name="config">The <see cref="HttpConfiguration"/>.</param>
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/// <param name="sample">The sample request.</param>
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/// <param name="mediaType">The media type.</param>
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/// <param name="controllerName">Name of the controller.</param>
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/// <param name="actionName">Name of the action.</param>
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/// <param name="parameterNames">The parameter names.</param>
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public static void SetSampleRequest(this HttpConfiguration config, object sample, MediaTypeHeaderValue mediaType, string controllerName, string actionName, params string[] parameterNames)
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{
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config.GetHelpPageSampleGenerator().ActionSamples.Add(new HelpPageSampleKey(mediaType, SampleDirection.Request, controllerName, actionName, parameterNames), sample);
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}
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/// <summary>
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/// Sets the sample request directly for the specified media type of the action.
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/// </summary>
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/// <param name="config">The <see cref="HttpConfiguration"/>.</param>
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/// <param name="sample">The sample response.</param>
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/// <param name="mediaType">The media type.</param>
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/// <param name="controllerName">Name of the controller.</param>
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/// <param name="actionName">Name of the action.</param>
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public static void SetSampleResponse(this HttpConfiguration config, object sample, MediaTypeHeaderValue mediaType, string controllerName, string actionName)
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{
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config.GetHelpPageSampleGenerator().ActionSamples.Add(new HelpPageSampleKey(mediaType, SampleDirection.Response, controllerName, actionName, new[] { "*" }), sample);
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}
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/// <summary>
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/// Sets the sample response directly for the specified media type of the action with specific parameters.
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/// </summary>
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/// <param name="config">The <see cref="HttpConfiguration"/>.</param>
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/// <param name="sample">The sample response.</param>
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/// <param name="mediaType">The media type.</param>
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/// <param name="controllerName">Name of the controller.</param>
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/// <param name="actionName">Name of the action.</param>
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/// <param name="parameterNames">The parameter names.</param>
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public static void SetSampleResponse(this HttpConfiguration config, object sample, MediaTypeHeaderValue mediaType, string controllerName, string actionName, params string[] parameterNames)
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{
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config.GetHelpPageSampleGenerator().ActionSamples.Add(new HelpPageSampleKey(mediaType, SampleDirection.Response, controllerName, actionName, parameterNames), sample);
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}
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/// <summary>
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/// Sets the sample directly for all actions with the specified media type.
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/// </summary>
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/// <param name="config">The <see cref="HttpConfiguration"/>.</param>
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/// <param name="sample">The sample.</param>
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/// <param name="mediaType">The media type.</param>
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public static void SetSampleForMediaType(this HttpConfiguration config, object sample, MediaTypeHeaderValue mediaType)
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{
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config.GetHelpPageSampleGenerator().ActionSamples.Add(new HelpPageSampleKey(mediaType), sample);
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}
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/// <summary>
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/// Sets the sample directly for all actions with the specified type and media type.
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/// </summary>
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/// <param name="config">The <see cref="HttpConfiguration"/>.</param>
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/// <param name="sample">The sample.</param>
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/// <param name="mediaType">The media type.</param>
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/// <param name="type">The parameter type or return type of an action.</param>
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public static void SetSampleForType(this HttpConfiguration config, object sample, MediaTypeHeaderValue mediaType, Type type)
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{
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config.GetHelpPageSampleGenerator().ActionSamples.Add(new HelpPageSampleKey(mediaType, type), sample);
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}
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/// <summary>
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/// Specifies the actual type of <see cref="System.Net.Http.ObjectContent{T}"/> passed to the <see cref="System.Net.Http.HttpRequestMessage"/> in an action.
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/// The help page will use this information to produce more accurate request samples.
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/// </summary>
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/// <param name="config">The <see cref="HttpConfiguration"/>.</param>
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/// <param name="type">The type.</param>
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/// <param name="controllerName">Name of the controller.</param>
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/// <param name="actionName">Name of the action.</param>
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public static void SetActualRequestType(this HttpConfiguration config, Type type, string controllerName, string actionName)
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{
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config.GetHelpPageSampleGenerator().ActualHttpMessageTypes.Add(new HelpPageSampleKey(SampleDirection.Request, controllerName, actionName, new[] { "*" }), type);
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}
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/// <summary>
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/// Specifies the actual type of <see cref="System.Net.Http.ObjectContent{T}"/> passed to the <see cref="System.Net.Http.HttpRequestMessage"/> in an action.
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/// The help page will use this information to produce more accurate request samples.
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/// </summary>
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/// <param name="config">The <see cref="HttpConfiguration"/>.</param>
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/// <param name="type">The type.</param>
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/// <param name="controllerName">Name of the controller.</param>
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/// <param name="actionName">Name of the action.</param>
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/// <param name="parameterNames">The parameter names.</param>
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public static void SetActualRequestType(this HttpConfiguration config, Type type, string controllerName, string actionName, params string[] parameterNames)
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{
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config.GetHelpPageSampleGenerator().ActualHttpMessageTypes.Add(new HelpPageSampleKey(SampleDirection.Request, controllerName, actionName, parameterNames), type);
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}
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/// <summary>
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/// Specifies the actual type of <see cref="System.Net.Http.ObjectContent{T}"/> returned as part of the <see cref="System.Net.Http.HttpRequestMessage"/> in an action.
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/// The help page will use this information to produce more accurate response samples.
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/// </summary>
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/// <param name="config">The <see cref="HttpConfiguration"/>.</param>
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/// <param name="type">The type.</param>
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/// <param name="controllerName">Name of the controller.</param>
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/// <param name="actionName">Name of the action.</param>
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public static void SetActualResponseType(this HttpConfiguration config, Type type, string controllerName, string actionName)
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{
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config.GetHelpPageSampleGenerator().ActualHttpMessageTypes.Add(new HelpPageSampleKey(SampleDirection.Response, controllerName, actionName, new[] { "*" }), type);
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}
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/// <summary>
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/// Specifies the actual type of <see cref="System.Net.Http.ObjectContent{T}"/> returned as part of the <see cref="System.Net.Http.HttpRequestMessage"/> in an action.
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/// The help page will use this information to produce more accurate response samples.
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/// </summary>
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/// <param name="config">The <see cref="HttpConfiguration"/>.</param>
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/// <param name="type">The type.</param>
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/// <param name="controllerName">Name of the controller.</param>
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/// <param name="actionName">Name of the action.</param>
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/// <param name="parameterNames">The parameter names.</param>
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public static void SetActualResponseType(this HttpConfiguration config, Type type, string controllerName, string actionName, params string[] parameterNames)
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{
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config.GetHelpPageSampleGenerator().ActualHttpMessageTypes.Add(new HelpPageSampleKey(SampleDirection.Response, controllerName, actionName, parameterNames), type);
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}
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/// <summary>
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/// Gets the help page sample generator.
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/// </summary>
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/// <param name="config">The <see cref="HttpConfiguration"/>.</param>
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/// <returns>The help page sample generator.</returns>
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public static HelpPageSampleGenerator GetHelpPageSampleGenerator(this HttpConfiguration config)
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{
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return (HelpPageSampleGenerator)config.Properties.GetOrAdd(
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typeof(HelpPageSampleGenerator),
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k => new HelpPageSampleGenerator());
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}
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/// <summary>
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/// Sets the help page sample generator.
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/// </summary>
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/// <param name="config">The <see cref="HttpConfiguration"/>.</param>
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/// <param name="sampleGenerator">The help page sample generator.</param>
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public static void SetHelpPageSampleGenerator(this HttpConfiguration config, HelpPageSampleGenerator sampleGenerator)
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{
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config.Properties.AddOrUpdate(
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typeof(HelpPageSampleGenerator),
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k => sampleGenerator,
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(k, o) => sampleGenerator);
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}
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/// <summary>
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/// Gets the model description generator.
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/// </summary>
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/// <param name="config">The configuration.</param>
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/// <returns>The <see cref="ModelDescriptionGenerator"/></returns>
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public static ModelDescriptionGenerator GetModelDescriptionGenerator(this HttpConfiguration config)
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{
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return (ModelDescriptionGenerator)config.Properties.GetOrAdd(
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typeof(ModelDescriptionGenerator),
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k => InitializeModelDescriptionGenerator(config));
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}
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/// <summary>
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/// Gets the model that represents an API displayed on the help page. The model is initialized on the first call and cached for subsequent calls.
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/// </summary>
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/// <param name="config">The <see cref="HttpConfiguration"/>.</param>
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/// <param name="apiDescriptionId">The <see cref="ApiDescription"/> ID.</param>
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/// <returns>
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/// An <see cref="HelpPageApiModel"/>
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/// </returns>
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public static HelpPageApiModel GetHelpPageApiModel(this HttpConfiguration config, string apiDescriptionId)
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{
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object model;
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string modelId = ApiModelPrefix + apiDescriptionId;
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if (!config.Properties.TryGetValue(modelId, out model))
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{
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Collection<ApiDescription> apiDescriptions = config.Services.GetApiExplorer().ApiDescriptions;
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ApiDescription apiDescription = apiDescriptions.FirstOrDefault(api => String.Equals(api.GetFriendlyId(), apiDescriptionId, StringComparison.OrdinalIgnoreCase));
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if (apiDescription != null)
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{
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model = GenerateApiModel(apiDescription, config);
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config.Properties.TryAdd(modelId, model);
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}
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}
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return (HelpPageApiModel)model;
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}
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private static HelpPageApiModel GenerateApiModel(ApiDescription apiDescription, HttpConfiguration config)
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{
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HelpPageApiModel apiModel = new HelpPageApiModel()
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{
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ApiDescription = apiDescription,
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};
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ModelDescriptionGenerator modelGenerator = config.GetModelDescriptionGenerator();
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HelpPageSampleGenerator sampleGenerator = config.GetHelpPageSampleGenerator();
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GenerateUriParameters(apiModel, modelGenerator);
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GenerateRequestModelDescription(apiModel, modelGenerator, sampleGenerator);
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GenerateResourceDescription(apiModel, modelGenerator);
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GenerateSamples(apiModel, sampleGenerator);
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return apiModel;
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}
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private static void GenerateUriParameters(HelpPageApiModel apiModel, ModelDescriptionGenerator modelGenerator)
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{
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ApiDescription apiDescription = apiModel.ApiDescription;
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foreach (ApiParameterDescription apiParameter in apiDescription.ParameterDescriptions)
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{
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if (apiParameter.Source == ApiParameterSource.FromUri)
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{
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HttpParameterDescriptor parameterDescriptor = apiParameter.ParameterDescriptor;
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Type parameterType = null;
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ModelDescription typeDescription = null;
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ComplexTypeModelDescription complexTypeDescription = null;
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if (parameterDescriptor != null)
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{
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parameterType = parameterDescriptor.ParameterType;
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typeDescription = modelGenerator.GetOrCreateModelDescription(parameterType);
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complexTypeDescription = typeDescription as ComplexTypeModelDescription;
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}
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// Example:
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// [TypeConverter(typeof(PointConverter))]
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// public class Point
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// {
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// public Point(int x, int y)
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// {
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// X = x;
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// Y = y;
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// }
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// public int X { get; set; }
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// public int Y { get; set; }
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// }
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// Class Point is bindable with a TypeConverter, so Point will be added to UriParameters collection.
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//
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// public class Point
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// {
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// public int X { get; set; }
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// public int Y { get; set; }
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// }
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// Regular complex class Point will have properties X and Y added to UriParameters collection.
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if (complexTypeDescription != null
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&& !IsBindableWithTypeConverter(parameterType))
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{
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foreach (ParameterDescription uriParameter in complexTypeDescription.Properties)
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{
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apiModel.UriParameters.Add(uriParameter);
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}
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}
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else if (parameterDescriptor != null)
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{
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ParameterDescription uriParameter =
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AddParameterDescription(apiModel, apiParameter, typeDescription);
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if (!parameterDescriptor.IsOptional)
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{
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uriParameter.Annotations.Add(new ParameterAnnotation() { Documentation = "Required" });
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}
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object defaultValue = parameterDescriptor.DefaultValue;
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if (defaultValue != null)
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{
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uriParameter.Annotations.Add(new ParameterAnnotation() { Documentation = "Default value is " + Convert.ToString(defaultValue, CultureInfo.InvariantCulture) });
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}
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}
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else
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{
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Debug.Assert(parameterDescriptor == null);
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// If parameterDescriptor is null, this is an undeclared route parameter which only occurs
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// when source is FromUri. Ignored in request model and among resource parameters but listed
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// as a simple string here.
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ModelDescription modelDescription = modelGenerator.GetOrCreateModelDescription(typeof(string));
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AddParameterDescription(apiModel, apiParameter, modelDescription);
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}
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}
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}
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}
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private static bool IsBindableWithTypeConverter(Type parameterType)
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{
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if (parameterType == null)
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{
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return false;
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}
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return TypeDescriptor.GetConverter(parameterType).CanConvertFrom(typeof(string));
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}
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private static ParameterDescription AddParameterDescription(HelpPageApiModel apiModel,
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ApiParameterDescription apiParameter, ModelDescription typeDescription)
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{
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ParameterDescription parameterDescription = new ParameterDescription
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{
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Name = apiParameter.Name,
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Documentation = apiParameter.Documentation,
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TypeDescription = typeDescription,
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};
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apiModel.UriParameters.Add(parameterDescription);
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return parameterDescription;
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}
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private static void GenerateRequestModelDescription(HelpPageApiModel apiModel, ModelDescriptionGenerator modelGenerator, HelpPageSampleGenerator sampleGenerator)
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{
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ApiDescription apiDescription = apiModel.ApiDescription;
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foreach (ApiParameterDescription apiParameter in apiDescription.ParameterDescriptions)
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{
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if (apiParameter.Source == ApiParameterSource.FromBody)
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{
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Type parameterType = apiParameter.ParameterDescriptor.ParameterType;
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apiModel.RequestModelDescription = modelGenerator.GetOrCreateModelDescription(parameterType);
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apiModel.RequestDocumentation = apiParameter.Documentation;
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}
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else if (apiParameter.ParameterDescriptor != null &&
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apiParameter.ParameterDescriptor.ParameterType == typeof(HttpRequestMessage))
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{
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Type parameterType = sampleGenerator.ResolveHttpRequestMessageType(apiDescription);
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if (parameterType != null)
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{
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apiModel.RequestModelDescription = modelGenerator.GetOrCreateModelDescription(parameterType);
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}
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}
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}
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}
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private static void GenerateResourceDescription(HelpPageApiModel apiModel, ModelDescriptionGenerator modelGenerator)
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{
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ResponseDescription response = apiModel.ApiDescription.ResponseDescription;
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Type responseType = response.ResponseType ?? response.DeclaredType;
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if (responseType != null && responseType != typeof(void))
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{
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apiModel.ResourceDescription = modelGenerator.GetOrCreateModelDescription(responseType);
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}
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}
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[SuppressMessage("Microsoft.Design", "CA1031:DoNotCatchGeneralExceptionTypes", Justification = "The exception is recorded as ErrorMessages.")]
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private static void GenerateSamples(HelpPageApiModel apiModel, HelpPageSampleGenerator sampleGenerator)
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{
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try
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{
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foreach (var item in sampleGenerator.GetSampleRequests(apiModel.ApiDescription))
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{
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apiModel.SampleRequests.Add(item.Key, item.Value);
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LogInvalidSampleAsError(apiModel, item.Value);
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}
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foreach (var item in sampleGenerator.GetSampleResponses(apiModel.ApiDescription))
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{
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apiModel.SampleResponses.Add(item.Key, item.Value);
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LogInvalidSampleAsError(apiModel, item.Value);
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}
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}
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catch (Exception e)
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{
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apiModel.ErrorMessages.Add(String.Format(CultureInfo.CurrentCulture,
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"An exception has occurred while generating the sample. Exception message: {0}",
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HelpPageSampleGenerator.UnwrapException(e).Message));
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}
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}
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private static bool TryGetResourceParameter(ApiDescription apiDescription, HttpConfiguration config, out ApiParameterDescription parameterDescription, out Type resourceType)
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{
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parameterDescription = apiDescription.ParameterDescriptions.FirstOrDefault(
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p => p.Source == ApiParameterSource.FromBody ||
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(p.ParameterDescriptor != null && p.ParameterDescriptor.ParameterType == typeof(HttpRequestMessage)));
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if (parameterDescription == null)
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{
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resourceType = null;
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return false;
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}
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resourceType = parameterDescription.ParameterDescriptor.ParameterType;
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if (resourceType == typeof(HttpRequestMessage))
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{
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HelpPageSampleGenerator sampleGenerator = config.GetHelpPageSampleGenerator();
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resourceType = sampleGenerator.ResolveHttpRequestMessageType(apiDescription);
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}
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if (resourceType == null)
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{
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parameterDescription = null;
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return false;
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}
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return true;
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}
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private static ModelDescriptionGenerator InitializeModelDescriptionGenerator(HttpConfiguration config)
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{
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ModelDescriptionGenerator modelGenerator = new ModelDescriptionGenerator(config);
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Collection<ApiDescription> apis = config.Services.GetApiExplorer().ApiDescriptions;
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foreach (ApiDescription api in apis)
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{
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ApiParameterDescription parameterDescription;
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Type parameterType;
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if (TryGetResourceParameter(api, config, out parameterDescription, out parameterType))
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{
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modelGenerator.GetOrCreateModelDescription(parameterType);
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}
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}
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return modelGenerator;
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}
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private static void LogInvalidSampleAsError(HelpPageApiModel apiModel, object sample)
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{
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InvalidSample invalidSample = sample as InvalidSample;
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if (invalidSample != null)
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{
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apiModel.ErrorMessages.Add(invalidSample.ErrorMessage);
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}
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}
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}
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}
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