add gozero swagger demo

example/gozero/main.go

@@ -0,0 +1,60 @@
+package main
+
+import (
+	"fmt"
+	"github.com/zeromicro/go-zero/core/conf"
+	"github.com/zeromicro/go-zero/rest"
+	"github.com/zeromicro/go-zero/rest/httpx"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"os"
+)
+
+const config = `{"Name": "gozero", "Host": "0.0.0.0", "Port": 8888}`
+
+func main() {
+	var c rest.RestConf
+	var env string = "dev"
+	err := conf.LoadConfigFromYamlBytes([]byte(config), &c)
+	if err != nil {
+		panic(err)
+	}
+	server, err := rest.NewServer(c)
+	if err != nil {
+		panic(err)
+	}
+	defer server.Stop()
+
+	swaggerFile, err := os.Open("example/gozero/swagger.json")
+	if err != nil {
+		log.Println(err)
+	}
+	defer swaggerFile.Close()
+	SwaggerByte, err := ioutil.ReadAll(swaggerFile)
+	if err != nil {
+		log.Println(err)
+	}
+
+	server.AddRoutes([]rest.Route{
+		{
+			Method:  http.MethodGet,
+			Path:    "/swagger",
+			Handler: Doc("/swagger", env),
+		},
+		{
+			Method: http.MethodGet,
+			Path:   "/swagger-json",
+			Handler: func(writer http.ResponseWriter, request *http.Request) {
+				writer.Header().Set("Content-Type", "application/json; charset=utf-8")
+				_, err := writer.Write(SwaggerByte)
+				if err != nil {
+					httpx.Error(writer, err)
+				}
+			},
+		},
+	})
+
+	fmt.Printf("Starting server at http://%s:%d...\n", c.Host, c.Port)
+	server.Start()
+}