Abp中SwaggerUI的多个接口文档配置说明

对外提供的接口在实际生成过程中，可能是需要一个接口版本的，比如说v1，manage。效果如下：

在swagger中怎么实现呢？

1. 添加SwaggerVersionHelper.cs

 public class SwaggerVersionHelper
    {
        public static bool ResolveVersionSupportByRouteConstraint(ApiDescription apiDesc, string targetApiVersion)
        {

            var attr = apiDesc.ActionDescriptor.ControllerDescriptor.GetCustomAttributes<VersionedRoute>().FirstOrDefault();
            if (attr == null)
            {
                if (targetApiVersion == "manage")
                {
                    return true;
                }
                else
                {
                    return false;
                }
            }

                int targetVersion;
                targetApiVersion = targetApiVersion.TrimStart('v');

                if (attr.Version !=  && int.TryParse(targetApiVersion, out targetVersion))
                {
                    return attr.Version == targetVersion;
                };

                return false;
         }
    }    

2. 添加VersionedRoute.cs

[AttributeUsage(AttributeTargets.All)]
public class VersionedRoute : Attribute
{
public VersionedRoute(string name, int version)
{
Name = name;
Version = version;
}

public string Name { get; set; }
public int Version { get; set; }
}

3. swagger配置多版本接口说明文档。

4. 在Controller中添加VersionedRoute特性。

上面个四个步骤配置好之后，就实现了接口多版本发布了。

最后还有一个问题，就是我想发布v1, v2...这些版本的接口的时候，一般来说不同的版本之间接口Controller的命名空间不同，但是ControllerName是一样的，并且AbpHttpControllerSelector在解析路由的时候是忽略命名空间的，那么错误就来了：Swagger不能准确的去解析多个一样的Controller。

解决办法：

添加一个ControllerSelector，他的作用就是通过命名空间来区分不同的Controller。

1. 添加一个NamespaceHttpControllerSelector.cs。

public class NamespaceHttpControllerSelector : AbpHttpControllerSelector, ISingletonDependency
{
private const string NamespaceKey = "namespace";
private const string ControllerKey = "controller";

private readonly HttpConfiguration _configuration;
private readonly Lazy<Dictionary<string, HttpControllerDescriptor>> _controllers;
private readonly HashSet<string> _duplicates;

public NamespaceHttpControllerSelector(HttpConfiguration config, DynamicApiControllerManager dynamicApiControllerManager)
: base(config, dynamicApiControllerManager)
{
_configuration = config;
_duplicates = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
_controllers = new Lazy<Dictionary<string, HttpControllerDescriptor>>(InitializeControllerDictionary);
}

private Dictionary<string, HttpControllerDescriptor> InitializeControllerDictionary()
{
var dictionary = new Dictionary<string, HttpControllerDescriptor>(StringComparer.OrdinalIgnoreCase);

// Create a lookup table where key is "namespace.controller". The value of "namespace" is the last
// segment of the full namespace. For example:
// MyApplication.Controllers.V1.ProductsController => "V1.Products"
IAssembliesResolver assembliesResolver = _configuration.Services.GetAssembliesResolver();
IHttpControllerTypeResolver controllersResolver = _configuration.Services.GetHttpControllerTypeResolver();

ICollection<Type> controllerTypes = controllersResolver.GetControllerTypes(assembliesResolver);

foreach (Type t in controllerTypes)
{
var segments = t.Namespace.Split(Type.Delimiter);

// For the dictionary key, strip "Controller" from the end of the type name.
// This matches the behavior of DefaultHttpControllerSelector.
var controllerName = t.Name.Remove(t.Name.Length - DefaultHttpControllerSelector.ControllerSuffix.Length);

var spacename = segments[segments.Length - ];
if (new Regex("v\\d+").IsMatch(spacename))
{
var key = String.Format(CultureInfo.InvariantCulture, "{0}.{1}", segments[segments.Length - ], controllerName);

// Check for duplicate keys.
if (dictionary.Keys.Contains(key))
{
_duplicates.Add(key);
}
else
{
dictionary[key] = new HttpControllerDescriptor(_configuration, t.Name, t);
}
}
else
{
dictionary[controllerName] = new HttpControllerDescriptor(_configuration, t.Name, t);
}
}

// Remove any duplicates from the dictionary, because these create ambiguous matches.
// For example, "Foo.V1.ProductsController" and "Bar.V1.ProductsController" both map to "v1.products".
foreach (string s in _duplicates)
{
dictionary.Remove(s);
}
return dictionary;
}

// Get a value from the route data, if present.
private static T GetRouteVariable<T>(IHttpRouteData routeData, string name)
{
object result = null;
if (routeData.Values.TryGetValue(name, out result))
{
return (T)result;
}
return default(T);
}

public override HttpControllerDescriptor SelectController(HttpRequestMessage request)
{
IHttpRouteData routeData = request.GetRouteData();
if (routeData == null)
{
throw new HttpResponseException(HttpStatusCode.NotFound);
}

// Get the namespace and controller variables from the route data.
string namespaceName = GetRouteVariable<string>(routeData, NamespaceKey);
if (namespaceName == null)
{
return base.SelectController(request);
}

string controllerName = GetRouteVariable<string>(routeData, ControllerKey);
if (controllerName == null)
{
return base.SelectController(request);
}

if (!new Regex("v\\d+").IsMatch(namespaceName))
{
return base.SelectController(request);
}

// Find a matching controller.
string key = String.Format(CultureInfo.InvariantCulture, "{0}.{1}", namespaceName, controllerName);

HttpControllerDescriptor controllerDescriptor;
if (_controllers.Value.TryGetValue(key, out controllerDescriptor))
{
return controllerDescriptor;
}
else if (_duplicates.Contains(key))
{
throw new HttpResponseException(
request.CreateErrorResponse(HttpStatusCode.InternalServerError,
"Multiple controllers were found that match this request."));
}
else
{
throw new HttpResponseException(HttpStatusCode.NotFound);
}
}

public override IDictionary<string, HttpControllerDescriptor> GetControllerMapping()
{
return _controllers.Value;
}

public void UseThis()
{
_configuration.Services.Replace(typeof(IHttpControllerSelector), this);
}
}
 

2. 在WebApi中配置这个ControllerSelector。