Follow Redirects / Use CookieContainer Use HttpHandlerOptions in Route configuration to set up HttpHandler behavior: We can use either Visual Studio 2022 or Visual Studio Code(using .NET CLI commands) to create any.Net6 application. For instance, fine granularity in the API Gateway tier can be especially useful for more advanced composite UI applications that are based on microservices, because the concept of a fine-grained API Gateway is similar to a UI composition service. This service actually just hosts the ABP Identity package/module. separate libraries for controllers and models), you can invoke the IncludeXmlComments method multiple times and they will all be merged into the outputted Swagger JSON. Docker The swagger-ui has built-in support to participate in OAuth2.0 authorization flows. That is, for derived models, the inherited properties are combined and listed alongside the declared properties. It redirects to the AuthServer for authentication. Does not include any API itself. If necessary, you can change this when enabling the Swagger middleware. To ensure this works behind virtual directories and reverse proxies, you should express this relative to the RoutePrefix of the swagger-ui itself: NOTE: In previous versions of the docs, you may have seen this expressed as a root-relative link (e.g. So when client calls Gateway API endpoint behind scenes API Gateway invokes appropriate microservice URL based on URLs registered with, on receiving the response from microservices, API Gateway delivers the same response to the clients. Install the standard Nuget package into your ASP.NET Core application. Once the user enters a correct username & password, the page is redirected to the public web site application again. Notice that this DbContext is only for database migrations. This tag is then used to drive the operation groupings in the swagger-ui. What Is Web API: Web API is a framework for building HTTP services that can be accessed from any client like browser, mobile devices, desktop apps. It interacts with authorization and/or token endpoints, as specified in the Swagger JSON, to obtain access tokens for subsequent API calls. NSwag) and would like to maintain the inheritance hierarchy in the generated client models. Azure Blob Storage: Azure blob storage is Microsoft cloud storage. The important point here for Ocelot is the configuration.json file that you must provide to the builder through the AddJsonFile() method. Figure 6-28. eShopOnContainers architecture with API Gateways. They are used by applications and other microservices through the gateways and HTTP APIs. You can see that the Catalog microservice is a typical ASP.NET Core Web API project with several controllers and methods like in the following code. The different HttpClient techniques that we are going to explore are like: Register HttpClient Object Explicitly In DI(Dependency Injection Service) Named Client Type Client HttpRequestMessage Object Create A .NET6 Minimal API Project: Let's create a .Net6 Minimal API sample project to accomplish our demo. If you have multiple XML comments files (e.g. Optionally, insert the swagger-ui middleware if you want to expose interactive documentation, specifying the Swagger JSON endpoint(s) to power it from. For example, ProductServiceHostModule declares this dependency. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. But the application is configured so it accesses all the microservices through the API Gateways, not through the direct port "shortcuts". Please take a look at the contribution guidelines pages first. NOTE: If you omit the explicit parameter bindings, the generator will describe them as "query" params by default. When using docker-compose, the services names are provided by the Docker Host, which is using the service names provided in the docker-compose files. If you want to use Swashbuckle's inheritance and/or polymorphism behavior, you can use annotations to explicitly indicate the "known" subtypes for a given base type. This detail will be described in the generated schema definition as follows: Once your application has been setup with Swashbuckle (see Getting Started), you can use the Swashbuckle CLI tool to retrieve Swagger / OpenAPI JSON directly from your application's startup assembly, and write it to file. It is important to highlight that in that diagram, you would be using a single custom API Gateway service facing multiple and different client apps. Once generated, it passes the schema and type through the list of configured Schema Filters. For example, you might have a class with multiple properties that you want to represent in JSON as a comma-separated string. So, it is also a client for the IdentityServer and defines a section in the appsettings.json file for that: Since it uses the Internal Gateway, it should also configure the remote endpoint of the gateway: When you set UseCurrentAccessToken to false, ABP ignores the current access_token in the current HttpContext and authenticates to the AuthServer with the credentials defined above. Supports self-hosting or individual hosting, so that all different kinds of apps can consume it. If using an orchestrator like Kubernetes or Service Fabric, that name should be resolved by the DNS or name resolution provided by each orchestrator. See the ClientDemoService class which simply injects IIdentityUserAppService and IProductAppService and uses them. It's packaged as a .NET Core Tool that can be installed and used via the dotnet SDK. When deploying to those environments you use different configuration files where you won't publish directly any external port for the microservices but, you'll always use the reverse proxy from the API Gateway. In my following example, I assume that the USB flash drive is disk 1. Fake JSON Server - Fake REST API for prototyping or as a CRUD Back End. The 'DownstreamPathTeplate' is our microservice endpoint. gitignore.io - Create useful .gitignore files for your project https://www.gitignore.io. RequestModels.Product & ResponseModels.Product), then Swashbuckle will raise an exception due to "Conflicting schemaIds". Ocelot is a finalizer ASP.NET Core middleware and should be written as the last item in the pipeline: It handles and redirects requests based on the configuration above. The UpstreamPathTemplate is the URL that Ocelot will use to identify which DownstreamPathTemplate to use for a given request from the client. Gets the related product entity from the repository. Checks for common mistakes and usage problems. PublicWebSite can show blog posts and product list without login. https://sharplab.io, SmartCode SmartCode= IDataSource -> IBuildTask -> IOutput => Build Everything!!! Note how the descriptions are mapped onto corresponding Swagger fields. Best of all, it requires minimal coding and maintenance, allowing you to focus on building an awesome API. If you provide multiple endpoints, they'll be listed in the top right corner of the page, allowing users to toggle between the different documents. This solution is no longer maintained. According to that approach, the API Gateway composition diagram is in reality a bit more extended when considering the aggregator services that are not shown in the simplified global architecture diagram shown previously. Rest of the configuration is related to claims mapping (which is planned to be automated in next ABP versions). The 'Routes' property is an array type where we are going to add our URL mappings. AuthServer has a simple home page that shows the current user info if the current user has logged in: These pages are not included in the project itself. The custom index sample app demonstrates this approach, using the swagger-ui plugin system provide a custom topbar, and to hide the info component. This solution uses the Ocelot library to build API Gateways. scoop - A command-line installer for Windows. By default, it will pick up any subtypes that are defined in the same assembly as a given base type. CliFx - Declarative framework for building command line interfaces. Swashbuckle consists of multiple components that can be used together or individually depending on your needs. See https://github.com/swagger-api/swagger-ui/blob/v3.10.0/docs/usage/oauth2.md for more info: To use custom interceptors on requests and responses going through swagger-ui you can define them as javascript functions in the configuration: This can be useful in a range of scenarios where you might want to append local xsrf tokens to all requests for example: Install the following Nuget package into your ASP.NET Core application. So replace code inside of the 'Program.cs' file with the below code. Security Requirement Object in the Swagger spec. For these reasons, Blogging service should be defined as a client for the Identity service with its own credentials and permissions. SharpZipLib - #ziplib is a Zip, GZip, Tar and BZip2 library written entirely in C# for the .NET platform. HTTP Only JWT Cookie: In a SPA(Single Page Application) Authentication JWT token either can be stored in browser 'LocalStorage' or in 'Cookie'. This way, you can use simple attributes to explicitly list the inheritance and/or polymorphism relationships you want to expose. But if you use an ingress approach, you'll have a middle tier between the Internet and your services (including your API Gateways), acting as a reverse proxy. Reusing a single Ocelot Docker image across multiple API Gateway types. If you're using Newtonsoft, then you'll need to install a separate Swashbuckle package and explicitly opt-in. The ideal platform to build REST full services. Out-of-the-box, the tool will execute in the context of a "default" web host. Optionally, insert the swagger-ui middleware if you want to expose interactive documentation, specifying the Swagger JSON endpoint(s) to power it from. In this case, the SQL Server container and RabbitMQ container. This detail will be described in the generated schema definition as follows: Once your application has been setup with Swashbuckle (see Getting Started), you can use the Swashbuckle CLI tool to retrieve Swagger / OpenAPI JSON directly from your application's startup assembly, and write it to file. Also worth noting, "required" properties are specified as an array of property names on the top-level schema as opposed to a flag on each individual property. Every object that we store in Azure Storage has an address. But, you can change the default ordering of actions with a custom sorting strategy: NOTE: This dictates the sort order BEFORE actions are grouped and transformed into the Swagger format. Fix VLC not able to play MOV file issues with MOV to VLC Converter Using Pavtube Video Converter is the best option to resolve VLC cant play MOV file issues on Windows. To leverage this, you'll need to provide a custom version of index.html as described below. You can override the default tag by providing a function that applies tags by convention. Then, you can directly access the Catalog microservice and see its methods through the Swagger UI accessing directly through that "external" port, in this case http://host.docker.internal:5101/swagger: Figure 6-31. But ABP is message broker independent by providing necessary abstractions (see the Event Bus document). To leverage this, you'll need to provide a custom version of index.html as described below. It's useful if you don't want to manage lots of ReRoute specific settings. See Enabling OAuth2.0 Flows for more details. The example below is using static yaml files to generate documentation. installed via Swashbuckle.AspNetCore), Change the Path for Swagger JSON Endpoints, Working with Virtual Directories and Reverse Proxies, Flag Required Parameters and Schema Properties, Assign Actions to Documents by Convention, Exposing Multiple Documents through the UI, Omit Obsolete Operations and/or Schema Properties, Customize Operation Tags (e.g. But, once properly configured, gateway can aggregate permission values for multiple services as a single list which is more suitable for clients. Response Caching Headers: Response Caching carried out by the few Http based headers information between client and server. All applications and services uses Redis cache when you use and configure this package. This can cause a lot of duplication in the generated Swagger, particularly when there's multiple subtypes. This constructor only requires the minimal required arguments to create a new product with some optional arguments. This implementation follows the best practices offered here. So, you can query all audit logs of all applications from a single point. Configure Swashbuckle to incorporate the XML comments on file into the generated Swagger JSON: Annotate your actions with summary, remarks, param and response tags: You can also annotate types with summary and example tags: Rebuild your project to update the XML Comments file and navigate to the Swagger JSON endpoint. Check out the table below for the full list of options: By default, Swagger JSON will be exposed at the following route - "/swagger/{documentName}/swagger.json". When you deploy eShopOnContainers into Kubernetes, it exposes just a few services or endpoints via ingress, basically the following list of postfixes on the URLs: When deploying to Kubernetes, each Ocelot API Gateway is using a different "configuration.json" file for each pod running the API Gateways. If you navigate to the URL http://localhost:62157/, you are redirected to the swagger page to see and test the API. Swagger. With the setup described above, the generator will include all API operations in a single Swagger document. This will produce a file containing all XML comments at build-time. Service discovery in the client side integrating Ocelot with Consul or Eureka Contributions are always welcome! For example, the following configuration could be used to document different versions of an API. From Swashbuckle 5.0.0 and beyond a similar pattern is used. A tag already exists with the provided branch name. You can alter this when enabling the ReDoc middleware: ReDoc ships with its own set of configuration parameters, all described here https://github.com/Rebilly/ReDoc/blob/master/README.md#redoc-options-object. When To Use Queues? Lets implement API Gateway for our sample insurance sales portal using Ocelot. In this file, we will map our microservice URLs with our ocelot application URLs. The example below indicates that the scheme called "oauth2" should be applied to all operations, and that the "readAccess" and "writeAccess" scopes are required. For example, the following configuration will tag, and therefore group operations in the UI, by HTTP method: By default, actions are ordered by assigned tag (see above) before they're grouped into the path-centric, nested structure of the Swagger spec. It has a separated SQL database, named MsDemo_ProductManagement, for the product management module. Having an ingress Nginx tier in Kubernetes in front of the web applications plus the several Ocelot API Gateways / BFF is the ideal architecture, as shown in the following diagram. See Microsoft's documentation for more. Careers Ocelot Swagger This is the URL that the swagger-ui, a client-side application, will call to retrieve your API metadata. Application property is set to ProductService for this example. For example you can define an OAuth 2.0 - implicit flow as follows: NOTE: In addition to defining a scheme, you also need to indicate which operations that scheme is applicable to. API Option 1) Decorate routes with a Name property, NOTE: With either approach, API authors are responsible for ensuring the uniqueness of operationIds across all Operations. By default, the Swagger UI will be exposed at "/swagger". In this solution, Web layer runs in the Backend Admin Application while API layer is hosted by the Product microservice. You can apply schemes globally (i.e. The example below provides a description for any tags that are assigned to operations in the document: NOTE: If you're using the SwaggerUI middleware, the TagDescriptionsDocumentFilter demonstrated above could be used to display additional descriptions beside each group of Operations. That is, if your application contains a class that meets either of the following naming conventions, then that class will be used to provide a host for the CLI tool to run in. Then, you also need to set authorization with the [Authorize] attribute on any resource to be accessed like the microservices, such as in the following Basket microservice controller. The heart of Swagger is the Swagger Specification (API description metadata which is a JSON "Core" Packages (i.e. To ensure this works behind virtual directories and reverse proxies, you should express this relative to the RoutePrefix of the swagger-ui itself: NOTE: In previous versions of the docs, you may have seen this expressed as a root-relative link (e.g. In eShopOnContainers, its API Gateway implementation is a simple ASP.NET Core WebHost project, and Ocelots middleware handles all the API Gateway features, as shown in the following image: Figure 6-32. See its own documentation to better understand the Ocelot configuration. To do this, start by defining multiple Swagger docs in Startup.cs: Take note of the first argument to SwaggerDoc. Then, when deploying to Docker, there will be four API-Gateway containers created from that same Docker image, as shown in the following extract from the docker-compose.yml file. In Swashbuckle, you can define schemes by invoking the AddSecurityDefinition method, providing a name and an instance of OpenApiSecurityScheme. Since there's only one cross-cutting concern in eShopOnContainers, it was decided to just handle the security service out of the API Gateway realm, for simplicity's sake. That is, out-of-the-box Swashbuckle will assume you're using the STJ serializer and generate Schema's based on its behavior. Cache-Control will be decorated with the following directives. For example, the Product Service has such a configuration: A distributed system obviously needs to a distributed and shared cache, instead of isolated in-memory caches for each service. for UI Grouping), Change Operation Sort Order (e.g. Run the catalog microservice in your local Docker host. SwaggerUI Document title now configurable, Improve polymorphism & inheritance behavior incl. This application uses the Internal Gateway. ABP makes distributed events easier to use by providing conventions, services and integrations. Instead, it provides a flexible customization system based on concepts and patterns from React and Redux. It acts as primary entry point to you back-end services . In this case, Swashbuckle doesn't know how the converter is implemented and so you would need to provide it with a Schema that accurately describes the type: Swashbuckle exposes a filter pipeline that hooks into the generation process. Data is stored to a single JSON file. Application layer of this module has two services: Notice that; instead of putting two application service into the same project, it might be a better principle to have separated application layers per application. This gateway is configured to use the swagger UI, a popular tool to discover & test HTTP APIs. The ReRoutes are the objects that tell Ocelot how to treat an upstream request. So, feel free to discuss about it with comments at the end of this post. For example, the following class could be used to leverage the same host configuration as your application: By default, the ReDoc UI will be exposed at "/api-docs". It knows where are Blogging and Product services are located. The ingress tier in eShopOnContainers when deployed into Kubernetes. The configuration related to authentication in the appsettings.json is simple: Swagger UI is configured and is the default page for this service. The configuration related to authentication in the appsettings.json is simple: See its own documentation to better understand the Ocelot configuration. If a parameter (top-level or property-based) is decorated with the BindRequiredAttribute or RequiredAttribute, then Swashbuckle will automatically flag it as a "required" parameter in the generated Swagger: In addition to parameters, Swashbuckle will also honor the RequiredAttribute when used in a model that's bound to the request body. For example, if you're using a base class for models that share common properties you can use the allOf keyword to describe the inheritance hierarchy. Because, ProductManager should implement a business rule on a new product creation. With the setup described above, the generator will include all API operations in a single Swagger document. Because, the user may not have required permissions on the Identity module, so it can not just pass the current authentication token directly to the Identity service. Gateways are used to provide a single entry point to the applications. Not implemented for this case, but it is also possible to localize business exceptions. hide PathItems for unaccepted roles, fix enums for client code generation, etc. Instead, AuthServer project uses the prebuilt ABP account module with IdentityServer extension. and declaring which of those schemes are applicable globally OR for specific operations. However, to support backwards compatibility, you can opt to continue exposing it in the 2.0 format with the following option: Virtual directories and reverse proxies can cause issues for applications that generate links and redirects, particularly if the app returns absolute URLs based on the Host header and other information from the current request. https://ocelot.readthedocs.io/en/latest/features/ratelimiting.html, Swagger for Ocelot This microservice uses IdentityServer Bearer authentication and configured like that: ApiName is the API which is being protected, IdentityService in this case. Domain Events vs. Integration Events in Domain-Driven Design That is, you can create filters with constructor parameters and if the parameter types are registered with the DI framework, they'll be automatically injected when the filters are instantiated. Throws. The benefit of decomposing an application into different smaller services is that it improves modularity. It is also possible to modify the theme by using the AdditionalItems property, see https://github.com/Rebilly/ReDoc/blob/master/README.md#redoc-options-object for more information. ProductManager is a simple domain service defined as shown: So, with this design, uniqueness of the product code is guaranteed. ApiName is the API which is being protected, BackendAdminAppGateway in this case. Ocelot is an Open source API GW for the ASP.net core platform . Plus, at the same time they can reuse the same Ocelot Docker image. So, to explicitly describe this behavior in Swagger, the corresponding request/response schema could be defined as follows: If UseAllOfForInheritance or UseOneOfForPolymorphism is enabled, and your serializer supports (and has enabled) emitting/accepting a discriminator property, then Swashbuckle will automatically generate the corresponding discriminator metadata on base schema definitions. See the eShopOnAbp project for the replacement solution. For more details, take a look at the Security Requirement Object in the Swagger spec.. The reference microservice application eShopOnContainers is currently using features provided by Envoy to implement the API Gateway instead of the earlier referenced Ocelot. NJsonSchema - NJsonSchema is a .NET library to read, generate and validate JSON Schema draft v4+ schemas. So if we use authentication with HTTP only JWT cookie then we no need to implement custom logic like adding authorization header or storing token data, etc at our client application. You can apply schemes globally (i.e. no-cache - this directive represents no storing of response and always fetch the fr, In this article, we will explore the Angular(14) reactive forms with an example. This is important to note if you're using the SwaggerUI middleware as it uses this value to group operations. This keyword points to the property that identifies the specific type being represented by a given payload. These packages are provided by the open-source community. appsettings.json file contains the RemoteServices section to declare the remote service endpoint(s). Create A .NET6 Web API Application: Let's create a .Net6 Web API sample application to accomplish our, NestJS Application Queues helps to deal with application scaling and performance challenges. Once generated, it passes the schema and type through the list of configured Schema Filters. Step1.NuGet Installation Swagger =>Reference 4.1 Override StartUp class public class Startup { public Startup (IConfiguration configuration) { Configuration = configuration; } public IConfiguration Configuration { get; } // This method gets called by the runtime. That diagram shows how the whole application is deployed into a single Docker host or development PC with "Docker for Windows" or "Docker for Mac". Users request ingress by POSTing the Ingress resource to the API server. The Swagger generator will automatically set this flag if the corresponding action is decorated with the ObsoleteAttribute. It uses the Internal Gateway (InternalGateway.Host) to perform HTTP API calls. docfx - Tools for building and publishing API documentation for .NET projects http://dotnet.github.io/docfx. In this way, swagger can discover them. A module with a database schema generally declares such an extension method to configure EF Core mappings for its own entities. You can alter this when enabling the ReDoc middleware: ReDoc ships with its own set of configuration parameters, all described here https://github.com/Rebilly/ReDoc/blob/master/README.md#redoc-options-object. Custom routes MUST include the {documentName} parameter. One of the major goals of the ABP framework is to provide a convenient infrastructure to create microservice solutions. This won't work if your app is hosted on an IIS virtual directory or behind a proxy that trims the request path before forwarding. An Audit Log record has a CorrelationId property that can be used to track a request. In Swashbuckle, most of these are surfaced through the SwaggerUI middleware options: NOTE: The InjectOnCompleteJavaScript and InjectOnFailureJavaScript options have been removed because the latest version of swagger-ui doesn't expose the necessary hooks. To omit a specific action, decorate it with the ApiExplorerSettingsAttribute and set the IgnoreApi flag: To omit actions by convention instead of decorating them individually, you can apply a custom action convention. BackendAdminAppHostModule declares dependencies to this package and to the related AbpHttpClientIdentityModelModule class. For example, you may want a separate document for each version of your API. See its Readme for more details, Some useful extensions (filters), which add additional documentation, e.g. Microsoft.AspNetCore.Mvc.Versioning), you could configure a custom predicate that leverages the versioning attributes instead: If you're using the SwaggerUI middleware, you'll need to specify any additional Swagger endpoints you want to expose. It has a dedicated MongoDB database (MsDemo_Blogging) to store blog and posts. Swagger "PathItems"), AND the ordering of operations within a group, in the Swagger output. That configuration.json is where you specify all the API Gateway ReRoutes, meaning the external endpoints with specific ports and the correlated internal endpoints, usually using different ports. The example below indicates that the scheme called "oauth2" should be applied to all operations, and that the "readAccess" and "writeAccess" scopes are required. It requires the additional identity scopes. The 'Bull' depends on Redis cache for data storage like a job. In addition to "PathItems", "Operations" and "Responses", which Swashbuckle generates for you, Swagger also supports global metadata (see https://swagger.io/specification/#oasObject). Generate beautiful API documentation, including a UI to explore and test operations, directly from your routes, controllers and models. However, instead of setting a flag, you can configure the generator to ignore obsolete actions altogether: A similar approach can also be used to omit obsolete properties from Schemas in the Swagger output. It is only used to serve UI pages of the Identity and Product Management modules. For example, you could wire up the following convention to only document GET operations: The Swagger spec allows one or more "tags" to be assigned to an operation. That is, you can create filters with constructor parameters and if the parameter types are registered with the DI framework, they'll be automatically injected when the filters are instantiated. There was a problem preparing your codespace, please try again. Once you refer these client packages, you can directly inject an application service interface (e.g. Supports default responses like 'XML' and 'JSON'.
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