The framework provides open API/Swagger use in two ways: 1. Provide swagger interface on service, 2. Use the protoc plug-in to generate the swagger.json file. Here are two ways to do this.

Method 1: Use plug-ins to provide the swagger API

Plugin swagger-api provides a range of swagger-related APIs, as well as the corresponding UI interface.

Installation

First install this plugin.

  1. go get -u github.com/go-kratos/swagger-api

Then initialize and register in newHTTPServer of internal/server/http.go, and try to put this route registration first to avoid match failed.

  1. import    "github.com/go-kratos/swagger-api/openapiv2"
  3. openAPIhandler := openapiv2.NewHandler()
  4. srv.HandlePrefix("/q/", openAPIhandler)

Usage

Open /q/swagger-ui/ in Web Browser in order to access Swagger UI

Method 2: Use protoc to generate swagger.json

The new project Makefile has been integrated by default with the commands associated with generating swagger.json, and here’s how to use them

Installation

First, install the protoc plug-in

  1. go get -u github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-openapiv2

Generation

(Recommended) run the following command at the root of the project for generation:

  1. make swagger

Or use the protoc command directly at the root of the project, note that modifying the final proto file path of the command is the actual path

  1. protoc --proto_path=. \
  2.         --proto_path=./third_party \
  3.         --openapiv2_out . \
  4.         --openapiv2_opt logtostderr=true \
  5.         --openapiv2_opt json_names_for_fields=false \
  6.         api/helloworld/v1/greeter.proto

Usage

Once the above command has been executed successfully, the corresponding swagger.json file will be generated in the directory where your proto file is located. You can import it into any platform that supports the Open API specification for browsing, such as: