notice/apiserver/server/server.go

package server

import (
	"fmt"
	"strings"

	"github.com/gin-gonic/gin"
	"kpt.notice/apiserver/config"
	"kpt.notice/apiserver/model/http"
	"kpt.notice/apiserver/service"
	"kpt.notice/pkg/log"
)

var (
	svc *service.Service
)

/*
router init
*/
func Init(s *service.Service, conf *config.Config) {
	svc = s
	engine := gin.New()
	engine.Use(gin.Recovery())
	engine.Use(Cors())
	route(engine)
	if err := engine.Run(conf.Listen); err != nil {
		panic(err)
	}
}

/*
	跨域
*/
func Cors() gin.HandlerFunc {
	return func(c *gin.Context) {
		method := c.Request.Method               //请求方法
		origin := c.Request.Header.Get("Origin") //请求头部
		var headerKeys []string                  // 声明请求头keys
		for k := range c.Request.Header {
			headerKeys = append(headerKeys, k)
		}

		headerStr := strings.Join(headerKeys, ", ")
		if headerStr != "" {
			headerStr = fmt.Sprintf("access-control-allow-origin, access-control-allow-headers, %s", headerStr)
		} else {
			headerStr = "access-control-allow-origin, access-control-allow-headers"
		}
		if origin != "" {
			c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
			c.Header("Access-Control-Allow-Origin", "*")                                        // 这是允许访问所有域
			c.Header("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE, UPDATE") //服务器支持的所有跨域请求的方法,为了避免浏览次请求的多次'预检'请求
			//  header的类型
			c.Header("Access-Control-Allow-Headers", "Authorization, Content-Length, X-CSRF-Token, id,  Token, name, optname, thumbnail, session, X_Requested_With, Accept, Origin, Host, Connection, Accept-Encoding, Accept-Language,DNT, X-CustomHeader, Keep-Alive, User-Agent, X-Requested-With, If-Modified-Since, Cache-Control, Content-Type, Pragma")
			//              允许跨域设置                                                                                                      可以返回其他子段
			c.Header("Access-Control-Expose-Headers", "Content-Length, Access-Control-Allow-Origin, Access-Control-Allow-Headers, Cache-Control, Content-Language, Content-Type, Expires, Last-Modified, Pragma, FooBar") // 跨域关键设置 让浏览器可以解析
			c.Header("Access-Control-Max-Age", "172800")                                                                                                                                                                  // 缓存请求信息 单位为秒
			c.Header("Access-Control-Allow-Credentials", "false")                                                                                                                                                         //  跨域请求是否需要带cookie信息 默认设置为true
			c.Set("content-type", "application/json")                                                                                                                                                                     // 设置返回格式是json
		}

		//放行所有OPTIONS方法
		if method == "OPTIONS" {
			c.JSON(200, "Options Request!")
		}
		// 处理请求
		c.Next() //  处理请求
	}
}

/*
	router  function list
*/
func route(e *gin.Engine) {
	e.GET("/wx", tokenAuth) //wx office server address auth
	// receive wx message ,include common message and event message
	e.POST("/wx", wxMessage)
	// create temporary wx code for bind wx account
	e.GET("/wx/code", getCode)
	//receive business message
	e.POST("/notice/message", postMessage)
	// query notice type
	e.GET("/notice/msgtype", getMsgType)
	// save notice type
	e.POST("/notice/msgtype", postMsgType)
}

/*
	http 响应
*/
func eJSON(c *gin.Context, data interface{}, err error) {
	code := 200
	success := true
	message := "ok"
	if err != nil {
		code, success, message = 400, false, err.Error()
	}
	resp := http.Response{
		Code:    code,
		Success: success,
		Data:    data,
		Message: message,
	}
	c.JSON(code, &resp)

}

/*
requet validate
*/
func Bind(c *gin.Context, req http.Request) bool {
	if err := c.ShouldBind(req); err != nil {
		eJSON(c, "request bind fail===", err)
		return false
	}
	log.Infof("body: %v", req)
	if err := req.Validate(); err != nil {
		log.Errorf("request validate fail: %v", err)
		eJSON(c, "request validate fail", req.Validate())
		return false
	}
	return true
}