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添加项目文件。
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‎.gitignore

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‎Sample.DynamicWebApi.sln

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 16
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VisualStudioVersion = 16.0.30114.105
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Sample.DynamicWebApi", "Sample.DynamicWebApi\Sample.DynamicWebApi.csproj", "{966D3F6E-B2AD-4D38-B79D-24891A92C6A0}"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Sample.WebApi", "Sample.WebApi\Sample.WebApi.csproj", "{DBA36000-BAE1-400B-BECE-1EB012F5C413}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{966D3F6E-B2AD-4D38-B79D-24891A92C6A0}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{966D3F6E-B2AD-4D38-B79D-24891A92C6A0}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{966D3F6E-B2AD-4D38-B79D-24891A92C6A0}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{966D3F6E-B2AD-4D38-B79D-24891A92C6A0}.Release|Any CPU.Build.0 = Release|Any CPU
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{DBA36000-BAE1-400B-BECE-1EB012F5C413}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{DBA36000-BAE1-400B-BECE-1EB012F5C413}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{DBA36000-BAE1-400B-BECE-1EB012F5C413}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{DBA36000-BAE1-400B-BECE-1EB012F5C413}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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EndGlobal

‎Sample.DynamicWebApi/ApplicationServiceControllerFeatureProvider.cs

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using Microsoft.AspNetCore.Mvc.Controllers;
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using System.Reflection;
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namespace Sample.DynamicWebApi;
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public class ApplicationServiceControllerFeatureProvider : ControllerFeatureProvider
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{
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protected override bool IsController(TypeInfo typeInfo)
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{
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if (typeof(IApplicationService).IsAssignableFrom(typeInfo))
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{
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if (!typeInfo.IsInterface &&
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!typeInfo.IsAbstract &&
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!typeInfo.IsGenericType &&
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typeInfo.IsPublic)
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{
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return true;
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}
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}
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return false;
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}
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}

‎Sample.DynamicWebApi/ApplicationServiceConvention.cs

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using Microsoft.AspNetCore.Http;
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using Microsoft.AspNetCore.Mvc;
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using Microsoft.AspNetCore.Mvc.ActionConstraints;
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using Microsoft.AspNetCore.Mvc.ApplicationModels;
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using Microsoft.AspNetCore.Mvc.ModelBinding;
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using System.Text;
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namespace Sample.DynamicWebApi;
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public class ApplicationServiceConvention : IApplicationModelConvention
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{
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public void Apply(ApplicationModel application)
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{
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foreach (var controller in application.Controllers)
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{
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if (typeof(IApplicationService).IsAssignableFrom(controller.ControllerType))
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{
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ConfigureApplicationService(controller);
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}
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}
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}
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private void ConfigureApplicationService(ControllerModel controller)
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{
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ConfigureApiExplorer(controller);
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ConfigureSelector(controller);
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ConfigureParameters(controller);
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}
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private void ConfigureApiExplorer(ControllerModel controller)
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{
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if (!controller.ApiExplorer.IsVisible.HasValue)
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{
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controller.ApiExplorer.IsVisible = true;
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}
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foreach (var action in controller.Actions)
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{
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if (!action.ApiExplorer.IsVisible.HasValue)
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{
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action.ApiExplorer.IsVisible = true;
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}
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}
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}
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private void ConfigureSelector(ControllerModel controller)
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{
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RemoveEmptySelectors(controller.Selectors);
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if (controller.Selectors.Any(temp => temp.AttributeRouteModel != null))
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{
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return;
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}
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foreach (var action in controller.Actions)
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{
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ConfigureSelector(action);
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}
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}
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private void ConfigureSelector(ActionModel action)
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{
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RemoveEmptySelectors(action.Selectors);
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if (action.Selectors.Count <= 0)
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{
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AddApplicationServiceSelector(action);
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}
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else
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{
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NormalizeSelectorRoutes(action);
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}
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}
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private void ConfigureParameters(ControllerModel controller)
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{
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foreach (var action in controller.Actions)
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{
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foreach (var parameter in action.Parameters)
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{
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if (parameter.BindingInfo != null)
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{
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continue;
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}
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if (parameter.ParameterType.IsClass &&
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parameter.ParameterType != typeof(string) &&
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parameter.ParameterType != typeof(IFormFile))
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{
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var httpMethods = action.Selectors.SelectMany(temp => temp.ActionConstraints).OfType<HttpMethodActionConstraint>().SelectMany(temp => temp.HttpMethods).ToList();
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if (httpMethods.Contains("GET") ||
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httpMethods.Contains("DELETE") ||
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httpMethods.Contains("TRACE") ||
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httpMethods.Contains("HEAD"))
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{
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continue;
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}
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parameter.BindingInfo = BindingInfo.GetBindingInfo(new[] { new FromBodyAttribute() });
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}
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}
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}
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}
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private void NormalizeSelectorRoutes(ActionModel action)
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{
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foreach (var selector in action.Selectors)
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{
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if (selector.AttributeRouteModel == null)
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{
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selector.AttributeRouteModel = new AttributeRouteModel(new RouteAttribute(CalculateRouteTemplate(action)));
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}
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if (selector.ActionConstraints.OfType<HttpMethodActionConstraint>().FirstOrDefault()?.HttpMethods?.FirstOrDefault() == null)
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{
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selector.ActionConstraints.Add(new HttpMethodActionConstraint(new[] { GetHttpMethod(action) }));
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}
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}
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}
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private void AddApplicationServiceSelector(ActionModel action)
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{
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var selector = new SelectorModel();
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selector.AttributeRouteModel = new AttributeRouteModel(new RouteAttribute(CalculateRouteTemplate(action)));
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selector.ActionConstraints.Add(new HttpMethodActionConstraint(new[] { GetHttpMethod(action) }));
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action.Selectors.Add(selector);
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}
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private string CalculateRouteTemplate(ActionModel action)
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{
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var routeTemplate = new StringBuilder();
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routeTemplate.Append("api");
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// 控制器名称部分
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var controllerName = action.Controller.ControllerName;
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if (controllerName.EndsWith("ApplicationService"))
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{
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controllerName = controllerName.Substring(0, controllerName.Length - "ApplicationService".Length);
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}
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else if (controllerName.EndsWith("AppService"))
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{
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controllerName = controllerName.Substring(0, controllerName.Length - "AppService".Length);
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}
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controllerName += "s";
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routeTemplate.Append($"/{controllerName}");
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// id 部分
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if (action.Parameters.Any(temp => temp.ParameterName == "id"))
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{
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routeTemplate.Append("/{id}");
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}
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// Action 名称部分
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var actionName = action.ActionName;
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if (actionName.EndsWith("Async"))
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{
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actionName = actionName.Substring(0, actionName.Length - "Async".Length);
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}
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var trimPrefixes = new[]
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{
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"GetAll","GetList","Get",
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"Post","Create","Add","Insert",
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"Put","Update",
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"Delete","Remove",
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"Patch"
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};
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foreach (var trimPrefix in trimPrefixes)
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{
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if (actionName.StartsWith(trimPrefix))
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{
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actionName = actionName.Substring(trimPrefix.Length);
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break;
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}
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}
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if (!string.IsNullOrEmpty(actionName))
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{
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routeTemplate.Append($"/{actionName}");
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}
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return routeTemplate.ToString();
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}
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private string GetHttpMethod(ActionModel action)
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{
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var actionName = action.ActionName;
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if (actionName.StartsWith("Get"))
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{
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return "GET";
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}
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if (actionName.StartsWith("Put") || actionName.StartsWith("Update"))
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{
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return "PUT";
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}
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if (actionName.StartsWith("Delete") || actionName.StartsWith("Remove"))
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{
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return "DELETE";
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}
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if (actionName.StartsWith("Patch"))
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{
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return "PATCH";
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}
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return "POST";
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}
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private void RemoveEmptySelectors(IList<SelectorModel> selectors)
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{
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for (var i = selectors.Count - 1; i >= 0; i--)
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{
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var selector = selectors[i];
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if (selector.AttributeRouteModel == null &&
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(selector.ActionConstraints == null || selector.ActionConstraints.Count <= 0) &&
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(selector.EndpointMetadata == null || selector.EndpointMetadata.Count <= 0))
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{
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selectors.Remove(selector);
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}
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}
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}
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}

‎Sample.DynamicWebApi/IApplicationService.cs

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namespace Sample.DynamicWebApi;
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public class IApplicationService
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{
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}

‎Sample.DynamicWebApi/Sample.DynamicWebApi.csproj

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFramework>net6.0</TargetFramework>
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<ImplicitUsings>enable</ImplicitUsings>
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<Nullable>enable</Nullable>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Microsoft.AspNetCore.App" Version="2.2.8" />
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</ItemGroup>
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</Project>

‎Sample.DynamicWebApi/SampleDynamicWebApiExtensions.cs

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using Microsoft.AspNetCore.Mvc;
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using Microsoft.Extensions.DependencyInjection;
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using System.Diagnostics;
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namespace Sample.DynamicWebApi;
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public static class SampleDynamicWebApiExtensions
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{
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public static IMvcBuilder AddDynamicWebApi(this IMvcBuilder builder)
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{
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if (builder is null)
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{
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throw new ArgumentNullException(nameof(builder));
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}
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builder.ConfigureApplicationPartManager(manager =>
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{
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manager.FeatureProviders.Add(new ApplicationServiceControllerFeatureProvider());
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});
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builder.Services.Configure<MvcOptions>(options =>
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{
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options.Conventions.Add(new ApplicationServiceConvention());
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});
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return builder;
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}
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public static IMvcCoreBuilder AddDynamicWebApi(this IMvcCoreBuilder builder)
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{
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if (builder is null)
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{
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throw new ArgumentNullException(nameof(builder));
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}
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builder.ConfigureApplicationPartManager(manager =>
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{
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manager.FeatureProviders.Add(new ApplicationServiceControllerFeatureProvider());
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});
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builder.Services.Configure<MvcOptions>(options =>
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{
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options.Conventions.Add(new ApplicationServiceConvention());
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});
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return builder;
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}
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}

‎Sample.WebApi/Controllers/WeatherForecastController.cs

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using Microsoft.AspNetCore.Mvc;
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namespace Sample.WebApi.Controllers;
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[ApiController]
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[Route("[controller]")]
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public class WeatherForecastController : ControllerBase
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{
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private static readonly string[] Summaries = new[]
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{
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"Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
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};
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private readonly ILogger<WeatherForecastController> _logger;
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public WeatherForecastController(ILogger<WeatherForecastController> logger)
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{
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_logger = logger;
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}
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[HttpGet(Name = "GetWeatherForecast")]
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public IEnumerable<WeatherForecast> Get()
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{
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return Enumerable.Range(1, 5).Select(index => new WeatherForecast
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{
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Date = DateTime.Now.AddDays(index),
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TemperatureC = Random.Shared.Next(-20, 55),
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Summary = Summaries[Random.Shared.Next(Summaries.Length)]
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})
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.ToArray();
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}
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}

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