go语言beego框架分页器操作及接口频率限制示例
来源:脚本之家    时间:2022-04-18 11:49:24
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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关键词: 相关文章 数据获取

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