go语言beego框架分页器操作及接口频率限制示例

目录

• 获取所有文章数据
• 获取总条数
• 设置每页的条数
• 总页数和当前页码
• 获取分页数据
• 返回数据
• beego接口频率限制

获取所有文章数据

o := orm.NewOrm()
qs := o.QueryTable("Article")
12

获取总条数

count, _ := qs.Count()
1

设置每页的条数

pageSetNum := 2
1

总页数和当前页码

//	总页数
pageCount := math.Ceil((float64(count) / float64(pageSetNum)))
//	获取当前页码
pageNum, err := this.GetInt("pageNum")
if err != nil {
	pageNum = 1
}
1234567

获取分页数据

//存储分页数据的切片
articles := new([]models.Article)
//获取分页数据
qs.Limit(pageSetNum, pageSetNum*(pageNum - 1)).All(articles)
1234

返回数据

beego.Info(*articles)
this.Data["articles"] = *articles
this.Data["count"] = count
this.Data["pageCount"] = pageCount
this.Data["pageNum"] = pageNum
this.TplName = "index.html"

beego接口频率限制

package utils
import (
	"github.com/astaxie/beego"
	"github.com/astaxie/beego/context"
	"github.com/astaxie/beego/logs"
	"github.com/ulule/limiter"
	"github.com/ulule/limiter/v3"
	"github.com/ulule/limiter/v3/drivers/store/memory"
	"net/http"
	"strings"
)
// RateLimiter this is a struct
type RateLimiter struct {
	Limiter     *limiter.Limiter
	Username    string
	UserType    string
	UserToken   string
	RemainTimes int
	MaxTimes    int
}
func RateLimit(rateLimit *RateLimiter, ctx *context.Context) {
	var (
		limiterCtx limiter.Context
		err        error
		req        = ctx.Request
	)
	opt := limiter.Options{
		IPv4Mask:           limiter.DefaultIPv4Mask,
		IPv6Mask:           limiter.DefaultIPv6Mask,
		TrustForwardHeader: false,
	}
	ip := limiter.GetIP(req, opt)

	if strings.HasPrefix(ctx.Input.URL(), "/") {
		limiterCtx, err = rateLimit.Limiter.Get(req.Context(), ip.String())
	} else {
		logs.Info("The api request is not track ")
	}
	if err != nil {
		ctx.Abort(http.StatusInternalServerError, err.Error())
		return
	}
	if limiterCtx.Reached {
		logs.Debug("Too Many Requests from %s on %s", ip, ctx.Input.URL())
		// refer to https://beego.me/docs/mvc/controller/errors.md for error handling
		ctx.Abort(http.StatusTooManyRequests, "429")
		return
	}
}
func PanicError(e error) {
	if e != nil {
		panic(e)
	}
}
func RunRate() {
	// 限制每秒登录的请求次数
	theRateLimit := &RateLimiter{}
	// 100 reqs/second: "100-S" "100-s"
	loginMaxRate := beego.AppConfig.String("total_rule::reqrate")
	loginRate, err := limiter.NewRateFromFormatted(loginMaxRate + "-s")
	PanicError(err)
	theRateLimit.Limiter = limiter.New(memory.NewStore(), loginRate)
	beego.InsertFilter("/*", beego.BeforeRouter, func(ctx *context.Context) {
		RateLimit(theRateLimit, ctx)
	}, true)
}

在main.go 里面调用方法即可

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