小工具

目录

go工具

1.数据库工具

1.1golang-gorm查询

func (o *object) QueryInfoByUid(uid int) (user User) {
	if uid <= 0 {
		o.Log.Error(qutil.ParamError)
		return
	}
	//err := o.Db.Model(User{}).Where(User{Uid: uid}).Find(&user).Error //方式一
  err := o.Db.Model(User{}).Where("id = ?",id).Find(&user).Error  // 方式二
	if err != nil {
		o.Log.Error(err)
	}
	return
}

type User struct {
	id       int               `json:"id"`
	Name     string          `json:"name"`
}

func (User) TableName() string {
	return "users"
}

1.2golang-sql查询

func (o object) QueryInfo(FBillNo string) *Info {
	r := new(Info)
	var qstr string
	switch {
	case len(FBillNo) > 0:
		qstr += fmt.Sprintf(" and \"FBillNo\" = '%s'", FBillNo)
	default:
		o.Log.Error("invalid param")
		return nil
	}
	sqlstr := `
	select
	coalesce("FBillNo",'') as FBillNo,
	coalesce(fshortnumber,'') as fshortnumber,
	coalesce(fname,'') as fname,
	coalesce(fchexing,'') as fchexing,
	coalesce(fys,'') as fys
	from 表名
	where 1=1
	`
	sqlstr += qstr
	err := o.DbRo.QueryRow(sqlstr).Scan(&r.FBillNo, &r.FShortNumber, &r.FName, &r.FCheXing, &r.Fys)
	if err != nil {
		o.Log.Errorf("param=%s,sql=%s,err=%v", FBillNo, sqlstr, err)
		return nil
	}
	return r
}

1.3golang-批量写入

1

func toTabInsert(rows []*Info) {
	db, _ := DB.GORM.DB()
	tx, err := db.Begin()
	if err != nil {
		log.Fatal(err)
	}
	stmt, err := tx.Prepare("insert into user (xxx) values(?,?,?,?,?,?)")
	if err != nil {
		log.Fatal(err)
	}
	for _, row := range rows {
		if _, err := stmt.Exec(xxx); err != nil {
			log.Fatal(err)
		}
	}
	_ = tx.Commit()
}

2

// 批量更新下注
func (impl *user) UpdateList(ctx context.Context, UserList []*user) error {
	session := impl.NewTransactionSession(ctx)
	err := session.Transaction(func(tx *gorm.DB) error {
		for _, user := range UserList {
			err := tx.Table("user").Where("uid = ? and round_id = ?", user.Uid, user.RoundId).Updates(map[string]any{
				"name": user.xxx,
				"age":         user.xxx,
				"xxx":   user.xxx,
			}).Error
			if err != nil {
				return err
			}
		}
		return nil
	})
	if err != nil {
		log.Errorf("UpdateList err:", err.Error())
		return err
	}
	return nil
}

// 批量处理
func BatchDto() {
	/*
		1.批量保存500条,不足500条，超过10秒自动保存
		2.处理关闭信号，在程序关闭时需要处理chan中剩余的任务
	*/
	ctx := context.Background()
	batchSize := 500
	var batch []*modelW.OdsDouyinVideo

	signalChan := make(chan os.Signal, 1)
	signal.Notify(signalChan, os.Interrupt, syscall.SIGTERM)
	go func() {
		s.log.Info("Program start")
		// 等待程序关闭信号
		<-signalChan
		s.log.Info("Program closing")
		for data := range chSave {
			batch = append(batch, data)
		}
		err := s.saveBatch(ctx, batch)
		if err != nil {
			s.log.Errorf("error:%v", err)
		}
		batch = nil
		return
	}()

	for {
		select {
		case data, ok := <-chSave:
			if !ok {
				continue
			}
			batch = append(batch, data)
			if len(batch) >= batchSize {
				err := s.saveBatch(ctx, batch)
				if err != nil {
					s.log.Errorf("error:%v", err)
				}
				batch = nil
			}
		case <-time.After(2 * time.Second):
			if len(batch) > 0 {
				err := s.saveBatch(ctx, batch)
				if err != nil {
					s.log.Errorf("error:%v", err)
				}
				batch = nil
			}
		}
	}
}

1.4golang-发送邮箱


邮箱

//SendMailCode 邮箱-发送邮箱验证码
/**
 * @receiver m
 * @param ctx 上下文
 * @param tx 事务
 * @param mail 邮箱
 * @param mailCode 邮箱验证码
 * @return resData 结果集
 * @return err 错误信息
 */
import (
	"gopkg.in/gomail.v2"
	"strconv"
)


func SendMailCode(mailSubject string, mail string, mailContent string) (resData bool, err error) {
	// 设置邮箱主体
	mailConn := map[string]string{
		"user": "123@gmblgamefi.com",
		"pass": "123",
		"host": "123aliyun.com",
		"port": "123",
	}
	port, _ := strconv.Atoi(mailConn["port"])
	mailNew := gomail.NewMessage()
	mailNew.SetHeader("From", mailNew.FormatAddress(mailConn["user"], ""))            // 添加别名
	mailNew.SetHeader("To", mail)                                                     // 发送给用户
	mailNew.SetHeader("Subject", mailSubject)                                         // 设置邮件主题
	mailNew.SetBody("text/html", mailContent)                                         // 设置邮件正文
	d := gomail.NewDialer(mailConn["host"], port, mailConn["user"], mailConn["pass"]) // 设置邮件正文
	err = d.DialAndSend(mailNew)
	if err != nil {
		panic(err)
	}
	return true, nil
}

1.5mysql工具

1.avg时：会忽略NULL值。如连表后的NULL值。
例如：10条数据，8条字段为NULL。那么avg时只会平均2条有值的。解决：其他为NULL值当作0处理，平均10条数据。
AVG(COALESCE(age,0)) as "AvgAge"

2.sql分组排序后取分组的前N个
使用ROW_NUMBER() OVER，排序编号
SELECT
	*
FROM
	( SELECT *, ROW_NUMBER() OVER ( PARTITION BY user_id ORDER BY updated_at DESC ) AS rn FROM user_table WHERE user_id IN ( 2,3,4 ) and status = 1 ) t 
WHERE
	t.rn = 1

3.gorm执行原生update的sql
sql:=`update xxx`
err = dbCtx.Exec(sql).Error
	if err != nil {
		a.log.WithContext(ctx).Error(err)
		return err
	}

4.分组累加之后，每行所占数值比例
UPDATE user_table AS t1
INNER JOIN (
  SELECT date, type, open_id, SUM(money) AS total_money
  FROM user_table
  GROUP BY type, date, open_id
) AS t2
  ON t1.open_id = t2.open_id
  AND t1.date = t2.date
  AND t1.type = t2.type
SET t1.distributions_ratio = (t1.money / t2.total_money)
WHERE t2.total_money>0

2.其他工具

2.1 in

func elementIsInSlice(element int, elements []int) (isIn bool) {
	for _, item := range elements {
		if element == item {
			isIn = true
			return
		}
	}
	return
}

func elementIsInSlice2(element string, elements []string) (isIn bool) {
	for _, item := range elements {
		if element == item {
			isIn = true
			return
		}
	}
	return
}

func main() {
	li:=[]string{"a","b","c"}
	if elementIsInSlice2("a",li){
		fmt.Println("在里面")
	}

}

2.2字符串反转

func main() {
	fmt.Println(reverseString("abc"))
}

//字符串反转
func reverseString(str string) string {
	strRune := []rune(str)
	l := len(strRune)
	for i := 0; i < l/2; i++ {
		strRune[i], strRune[l-i-1] = strRune[l-i-1], strRune[i]
	}
	return string(strRune)
}

2.3随机数

func RandomInt(length int) (str string) {

	var arr []byte = []byte{'0', '1', '2', '3', '4', '5', '6', '7', '8', '9'}

	r := rand.New(rand.NewSource(time.Now().UnixNano()))
	size := len(arr)
	for i := 0; i < length; i++ {
		str += string(arr[r.Intn(size)])
	}
	return
}

2.4万能格式字符串时间转时间戳 (支持10种格式)

func demo() {
	str1 := "2022-1-1"           //1.yyyy-m-d
	str2 := "2022-01-01"         //2.yyyy-mm-dd
	str3 := "2022/01/01"         //3:yyyy/mm/dd
	str4 := "2022/1/1"           //4:yyyy/m/d
	str5 := "2022-1-1 00-00-00"  //5:yyyy-mm-dd hh-mm-ss
	str6 := "2022-1-1 00:00:00"  //6:yyyy-mm-dd hh:mm:ss
	str7 := "2022-1-1 00/00/00"  //7:yyyy-mm-dd hh/mm/ss
	str8 := "2022/1/1 00-00-00"  //8:yyyy/mm/dd hh-mm-ss
	str9 := "2022/1/1 00:00:00"  //9:yyyy/mm/dd hh:mm:ss
	str10 := "2022/1/1 00/00/00" //10:yyyy/mm/dd hh/mm/ss

	fmt.Println(ParseTime(str10))
}

func ParseTime(strTime string) (int64, error) {
	strTime = strings.TrimSpace(strTime)
	s := strings.Split(strTime, " ")
	layout := "2006-1-2 15-04-05" //默认格式
	switch len(s) {
	case 1: //年月日
		if strings.Contains(strTime, "-") {
			layout = "2006-1-2" //1,2:yyy-m-d,yyy-mm-dd
		} else {

			layout = "2006/1/2" //3,4:yyyy/mm/dd,yyyy/m/d
		}
	case 2: //年月日时分秒
		if strings.Contains(s[0], "-") {
			if strings.Contains(s[1], "-") {
				layout = "2006-1-2 15-04-05" //5:yyyy-mm-dd hh-mm-ss
			} else {
				if strings.Contains(s[1], ":") {
					layout = "2006-1-2 15:04:05" //6:yyyy-mm-dd hh:mm:ss
				} else {
					layout = "2006-1-2 15/04/05" //7:yyyy-mm-dd hh/mm/ss
				}
			}
		} else {
			if strings.Contains(s[1], "-") {
				layout = "2006/1/2 15-04-05" //8:yyyy/mm/dd hh-mm-ss
			} else {
				if strings.Contains(s[1], ":") {
					layout = "2006/1/2 15:04:05" //9:yyyy/mm/dd hh:mm:ss
				} else {
					layout = "2006/1/2 15/04/05" //10:yyyy/mm/dd hh/mm/ss
				}
			}
		}
	}
	shipTsInt, err := time.ParseInLocation(layout, strTime, time.Local)
	if err != nil {
		fmt.Println("err:", err)
		return 0, err
	}
	return shipTsInt.Unix(), nil
}

2.5过期map

package main

import (
	"fmt"
	"time"
)

type Cache struct {
	data     map[string]interface{}
	expireAt map[string]time.Time
}

func (c *Cache) Set(key string, value interface{}, expire time.Duration) {
	c.data[key] = value
	c.expireAt[key] = time.Now().Add(expire)
}

func (c *Cache) Get(key string) (interface{}, bool) {
	expireTime, ok := c.expireAt[key]
	if !ok || time.Now().After(expireTime) {
		delete(c.data, key)
		delete(c.expireAt, key)
		return nil, false
	}
	return c.data[key], true
}

func main() {
	cache := &Cache{
		data:     make(map[string]interface{}),
		expireAt: make(map[string]time.Time),
	}

	// 设置键值对的过期时间为1秒
	cache.Set("name", "123456", time.Second)

	for {
		value, exist := cache.Get("name")
		if exist {
			fmt.Println(value)
		} else {
			fmt.Println("Key has expired or does not exist.")
			break
		}
		time.Sleep(time.Millisecond)
	}
}

2.6追加写文件

//写文件
func Ioutil_write(data string) {
	filePath := "./a.txt"

	// 打开文件，如果文件不存在则创建
	file, err := os.OpenFile(filePath, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0644)
	if err != nil {
		fmt.Println(err)
		return
	}
	defer file.Close()

	// 将文件指针定位到文件末尾
	_, err = file.Seek(0, io.SeekEnd)
	if err != nil {
		fmt.Println(err)
		return
	}

	// 将内容写入文件
	_, err = io.WriteString(file, data)
	if err != nil {
		fmt.Println(err)
		return
	}
}

2.7两个切片合并去重

func mergeAndDeduplicate(s1, s2 []int) []int {
	merged := append(s1, s2...)
	seen := make(map[int]bool)
	result := []int{}
	for _, v := range merged {
		if _, ok := seen[v]; !ok {
			seen[v] = true
			result = append(result, v)
		}
	}
	return result
}

2.8字符串长度

使用utf8.RuneCountInString函数来计算字符串的长度，其中每个字符都被视为一个Unicode码点。

func main() {
	str := "123"
	length := utf8.RuneCountInString(str)
	fmt.Println("字符串长度:", length)
}

3.excel操作

tealeg/xlsx包操作

"github.com/tealeg/xlsx"

// 创建一个新的Excel文件
file := xlsx.NewFile()

// 创建一个新的工作表
sheet, err := file.AddSheet("Sheet1")
if err != nil {
  log.Fatal(err)
}

// 设置第一列的宽度为20个字符宽度单位
sheet.SetColWidth(0, 20)

// 创建一个新的单元格，赋值为"Hello, world!"
cell := sheet.Cell(1, 1)
cell.SetValue("Hello, world!")

// 保存Excel文件
err = file.Save("example.xlsx")
if err != nil {
  log.Fatal(err)
}

//样式设置

样式设置

	//左对齐
	left_align := *xlsx.DefaultAlignment()
	left_align.Horizontal = "left"

	//居中
	center_H_align := *xlsx.DefaultAlignment()
	center_H_align.Horizontal = "center"

	//右对齐
	right_align := *xlsx.DefaultAlignment()
	right_align.Horizontal = "right"

	//标题字体样式设置
	border := *xlsx.NewBorder("thin", "thin", "thin", "thin")
	title_style := xlsx.NewStyle()
	font := *xlsx.NewFont(18, "SimSun")
	font.Bold = true
	title_style.Font = font
	title_style.Alignment = center_H_align
	title_style.ApplyAlignment = true
	title_style.Border = border
	title_style.ApplyBorder = true

	//内容字体样式设置
	text_style := xlsx.NewStyle()
	font = *xlsx.NewFont(20, "宋体")
	text_style.Font = font
	text_style.Alignment = center_H_align
	text_style.ApplyAlignment = true
	text_style.Border = border
	text_style.ApplyBorder = true

//应用配置
cell.SetStyle(title_style)

读

package main

import (
	"fmt"

	"github.com/tealeg/xlsx"
)

func main() {
	excelFileName := "test.xlsx"
	xlFile, err := xlsx.OpenFile(excelFileName) //所有的sheet
	if err != nil {
		fmt.Println("err:", err)
		return
	}

  fmt.Println(xlFile.Sheets[0])//第0个sheet
  
	for _, sheet := range xlFile.Sheets {
		fmt.Println(sheet.Name)
		for _, row := range sheet.Rows {
      //row行
			for _, cell := range row.Cells {
        //行里面的列
				text := cell.String()
				fmt.Printf("%s", text)
			}
		}
	}
}

读-封装

package main

import (
	"encoding/json"
	"fmt"
	"github.com/tealeg/xlsx"
)

type User struct {
	Name string `json:"name"`
	Age  string `json:"age"`
}

func main() {
	excelFileName := "1.xlsx"
	data, err := ReadToXlsx(excelFileName)
	if err != nil {
		fmt.Println(err)
		return
	}
	b, _ := json.Marshal(data)
	u := []User{}
	_ = json.Unmarshal(b, &u)
	fmt.Println(u)
}

func ReadToXlsx(tablename string) ([]map[string]interface{}, error) {
	xlFile, err := xlsx.OpenFile(tablename) //所有的sheet
	if err != nil {
		return nil, err
	}
	titleMap := map[int]string{}
	titleRow := xlFile.Sheets[0].Rows[0].Cells
	for k, titlename := range titleRow {
		titleMap[k] = titlename.String()
	}
	T := []map[string]interface{}{}
	for _, sheet := range xlFile.Sheets {
		//sheet表
		for i := 1; i < len(sheet.Rows); i++ {
			//表中的行
			t := map[string]interface{}{}
			for k, v := range sheet.Rows[i].Cells {
				//行中的列
				t[titleMap[k]] = v.Value
			}
			T = append(T, t)
		}
	}
	return T, nil
}

写

func WriteToXlsx(list []Res) {
	file := xlsx.NewFile()
	sheet, err := file.AddSheet("Sheet1")
	if err != nil {
		fmt.Printf(err.Error())
		return
	}
	row := sheet.AddRow()
	cell := row.AddCell()
	cell.Value = "标题1"
	cell = row.AddCell()
	cell.Value = "标题2"
	cell = row.AddCell()
	cell.Value = "标题3"

	nextRow := sheet.AddRow()
	cell = nextRow.AddCell()
	cell.Value = "内容1"
	cell = nextRow.AddCell()
	cell.Value = "内容2"
	cell = nextRow.AddCell()
	cell.Value = "内容3"

	file.Save("./1.xlsx")
}

写封装1-切片结构体转excel-直接保存

import (
	"fmt"
	"github.com/tealeg/xlsx"
	"reflect"
)

type User struct {
	Name string `json:"name"`
	Age  int    `json:"age"`
}

func main() {
	jeff := User{
		Name: "jeff",
		Age:  18,
	}
	chary := User{
		Name: "chary",
		Age:  20,
	}
	list := []interface{}{jeff, chary}
	if err := WriteToXlsx(list, "2", "Sheet1"); err != nil {
		fmt.Println(err)
	}
}

func WriteToXlsx(T []interface{}, tableName, sheetName string) error {
	t := reflect.TypeOf(T[0])
	titleCount := t.NumField()
	titleStrList := []string{}

	for i := 0; i < titleCount; i++ {
		titleStrList = append(titleStrList, t.Field(i).Name)
	}
	file := xlsx.NewFile()
	sheet, err := file.AddSheet(sheetName)
	if err != nil {
		return err
	}
	row := sheet.AddRow()
	cell := row.AddCell()
	for _, titleName := range titleStrList {
		cell.Value = titleName
		cell = row.AddCell()
	}
	for i := 0; i < len(T); i++ {
		r := T[i]
		nextRow := sheet.AddRow()
		s := reflect.ValueOf(r)
		for j := 0; j < titleCount; j++ {
			cell = nextRow.AddCell()
			cell.Value = fmt.Sprintf("%v", s.Field(j))
		}
	}
	if err = file.Save(fmt.Sprintf("%s.xlsx", tableName)); err != nil {
		return err
	}
	return nil
}

写封装2-切片结构体转excel-返回文件句柄

import (
	"fmt"
	"github.com/tealeg/xlsx"
	"reflect"
)

type User struct {
	Name string `json:"name"`
	Age  int    `json:"age"`
}
func main() {
	jeff := User{
		Name: "jeff",
		Age:  18,
	}
	chary := User{
		Name: "chary",
		Age:  20,
	}
	list := []interface{}{jeff, chary}
	file, err := WriteToXlsx2(list, "Sheet1")
	fmt.Println(err)
	fmt.Println(file)
}

func WriteToXlsx2(T []interface{}, sheetName string) (file *xlsx.File, err error) {
	t := reflect.TypeOf(T[0])
	titleCount := t.NumField()
	titleStrList := []string{}

	for i := 0; i < titleCount; i++ {
		titleStrList = append(titleStrList, t.Field(i).Name)
	}
	file = xlsx.NewFile()
	sheet, err := file.AddSheet(sheetName)
	if err != nil {
		return
	}
	row := sheet.AddRow()
	cell := row.AddCell()
	for _, titleName := range titleStrList {
		cell.Value = titleName
		cell = row.AddCell()
	}
	for i := 0; i < len(T); i++ {
		r := T[i]
		nextRow := sheet.AddRow()
		s := reflect.ValueOf(r)
		for j := 0; j < titleCount; j++ {
			cell = nextRow.AddCell()
			cell.Value = fmt.Sprintf("%v", s.Field(j))
		}
	}
	return
}

写封装3-切片结构体转excel(带excel样式)-直接保存

func WriteToXlsx2(T []interface{}, tableName, sheetName string) error {
	t := reflect.TypeOf(T[0])
	titleCount := t.NumField()
	type k struct {
		Column string
		Desc   string
		Width  int
	}
	titleMap := map[string]k{}
	for i := 0; i < titleCount; i++ {
		s := t.Field(i).Tag.Get("excel")
		st := strings.Split(s, ";")
		if len(st) <= 1 {
			return errors.New("检查结构体！！！")
		}
		width, _ := strconv.Atoi(strings.Split(st[2], ":")[1])
		column := strings.Split(st[0], ":")[1]
		titleMap[column] = k{
			Column: strings.Split(st[0], ":")[1],
			Desc:   strings.Split(st[1], ":")[1],
			Width:  width,
		}
	}
	titleColumnList := []string{}
	maxAscii := 'A'
	for column := range titleMap {
		columnAscii := []rune(column)[0]
		if columnAscii > maxAscii && columnAscii <= 'Z' {
			maxAscii = columnAscii
		}
	}
	for i := 'A'; i <= maxAscii; i++ {
		titleColumnList = append(titleColumnList, fmt.Sprintf("%c", i))
	}
	file := xlsx.NewFile()
	sheet, err := file.AddSheet(sheetName)
	if err != nil {
		return err
	}
	row := sheet.AddRow()
	cell := row.AddCell()

	nilMap := map[int]bool{}
	for index, titleTypeName := range titleColumnList {
		ks := titleMap[titleTypeName]
		if ks.Column == "" {
			nilMap[index] = true
		}
		sheet.SetColWidth(index, index, float64(ks.Width))
		cell.Value = ks.Desc
		cell = row.AddCell()
	}
	for i := 0; i < len(T); i++ {
		r := T[i]
		nextRow := sheet.AddRow()
		s := reflect.ValueOf(r)
		c := 0
		for j := 0; j < len(titleColumnList); j++ {
			if nilMap[j] == true {
				cell = nextRow.AddCell()
			} else {
				cell = nextRow.AddCell()
				value := s.Field(c)
				cell.Value = fmt.Sprintf("%v", value)
				c++
			}
		}
	}
	if err = file.Save(fmt.Sprintf("%s.xlsx", tableName)); err != nil {
		return err
	}
	return nil
}

func main() {
	jeff := User{
		Name: "jeff",
		Age:  18,
	}
	chary := User{
		Name: "chary",
		Age:  20,
	}
	list := []interface{}{jeff, chary}
	
	if err := WriteToXlsx2(list, "3", "Sheet1"); err != nil {
		fmt.Println(err)
	}
}

写封装4-切片结构体转excel(带excel样式)-返回文件句柄

func WriteToXlsx(T []interface{}, sheetName string) (file *xlsx.File, err error) {
	t := reflect.TypeOf(T[0])
	titleCount := t.NumField()
	type k struct {
		Column string
		Desc   string
		Width  int
	}
	titleMap := map[string]k{}
	for i := 0; i < titleCount; i++ {
		s := t.Field(i).Tag.Get("excel")
		st := strings.Split(s, ";")
		if len(st) <= 1 {
			return nil, errors.New("检查结构体！！！")
		}
		width, _ := strconv.Atoi(strings.Split(st[2], ":")[1])
		column := strings.Split(st[0], ":")[1]
		titleMap[column] = k{
			Column: strings.Split(st[0], ":")[1],
			Desc:   strings.Split(st[1], ":")[1],
			Width:  width,
		}
	}
	titleColumnList := []string{}
	maxAscii := 'A'
	for column := range titleMap {
		columnAscii := []rune(column)[0]
		if columnAscii > maxAscii && columnAscii <= 'Z' {
			maxAscii = columnAscii
		}
	}
	for i := 'A'; i <= maxAscii; i++ {
		titleColumnList = append(titleColumnList, fmt.Sprintf("%c", i))
	}
	file = xlsx.NewFile()
	sheet, err := file.AddSheet(sheetName)
	if err != nil {
		return nil, err
	}
	row := sheet.AddRow()
	cell := row.AddCell()

	nilMap := map[int]bool{}
	for index, titleTypeName := range titleColumnList {
		ks := titleMap[titleTypeName]
		if ks.Column == "" {
			nilMap[index] = true
		}
		sheet.SetColWidth(index, index, float64(ks.Width))
		cell.Value = ks.Desc
		cell = row.AddCell()
	}
	for i := 0; i < len(T); i++ {
		r := T[i]
		nextRow := sheet.AddRow()
		s := reflect.ValueOf(r)
		c := 0
		for j := 0; j < len(titleColumnList); j++ {
			if nilMap[j] == true {
				cell = nextRow.AddCell()
			} else {
				cell = nextRow.AddCell()
				value := s.Field(c)
				cell.Value = fmt.Sprintf("%v", value)
				c++
			}
		}
	}
	return file, nil
}
func main() {
	jeff := User{
		Name: "jeff",
		Age:  18,
	}
	chary := User{
		Name: "chary",
		Age:  20,
	}
	list := []interface{}{jeff, chary}
	file, _ := WriteToXlsx(list, "Sheet1")
	fmt.Println(file)
}

context读取excel，封装

import (
	"fmt"
	"path"

	"strconv"

	"github.com/gin-gonic/gin"
	"github.com/guyouyin123/tools/qtable"
)

func getFileExcelData(c *gin.Context) (shipType int, data []map[string]string, fileName string, err error) {
	shipTypeStr := c.PostForm("shipType")
	shipType, err = strconv.Atoi(shipTypeStr)
	if err != nil {
		err = fmt.Errorf("ship_type类型必须为int型")
		fmt.Println(err)
		return 0, nil, "", err
	}

	mf, err := c.FormFile("file")
	if err != nil {
		fmt.Println(err)
		return 0, nil, "", err
	}
	fh, err := mf.Open()
	if err != nil {
		fmt.Println(err)
		return 0, nil, "", err
	}
	defer fh.Close()
	table, err := qtable.TableRead(path.Ext(mf.Filename))
	if err != nil {
		fmt.Println(err)
		return 0, nil, "", err
	}
	data, err = table.Read(fh)
	if len(data) == 0 {
		err = fmt.Errorf("未读取到数据,请检查数据")
		fmt.Println(err)
		return 0, nil, "", err
	}
	fileName = mf.Filename

	return shipType, data, fileName, nil
}

写入csv文件

func writeCsv() {
	file, err := os.Create("data.csv")
	if err != nil {
		panic(err)
	}
	defer file.Close()

	// 创建 CSV 写入器
	writer := csv.NewWriter(file)
	defer writer.Flush()

	// 写入表头数据
	header := []string{"Name", "Age", "Gender"}
	writer.Write(header)

	// 写入数据行
	data := [][]string{
		{"Alice", "18", "Female"},
		{"Bob", "22", "Male"},
		{"Cathy", "27", "Female"},
	}
	for _, row := range data {
		writer.Write(row)
	}
}

4.input输入

func input(prompt string) string {
	var text string
	fmt.Print(prompt)
	fmt.Scan(&text)
	return text
}

func main() {
	a := input("你输入的名称：")
	b := input("你输入的性别：")
	c := input("你输入的年龄：")
	fmt.Printf("%v, %v, %v", a, b, c)
}

5.RsplitN右切

// RsplitN 切割字符串，从右边开始切割指定次数，并保留切割字符
func RsplitN(s string, delimiter string, cuts int) []string {
	if cuts == 0 {
		return []string{s}
	}
	// 从右向左切割字符串
	parts := strings.Split(s, delimiter)
	lenth := len(parts)
	// 如果切割次数超过了部分数量，限制为部分数量
	if cuts > lenth {
		cuts = len(parts)
	}
	tmp := lenth - cuts
	// 反转切割后的部分以从右边开始取
	result := make([]string, 0)
	st := ""
	for k, v := range parts {
		if k < tmp {
			st += v + delimiter
		} else {
			if st != "" {
				result = append(result, st)
				st = ""
			}
			result = append(result, v)
		}
	}
	return result
}

6.web展示图片

web展示图片--图片链接

package main

import (
	"fmt"
	"log"
	"net/http"
)

func main() {
	imgList := []string{"https://123.png", "https://456.png", "https://789.png"}
	// 注册 HTTP 处理函数
	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		// 设置响应头
		w.Header().Set("Content-Type", "text/html")

		imgStr := "<img src=\"%s\">"
		img := ""
		for _, v := range imgList {
			img += fmt.Sprintf(imgStr, v)
		}

		// 编写 HTML 页面
		fmt.Fprintf(w, `
            <!DOCTYPE html>
            <html>
                <head>
					<meta charset="utf-8">
                    <title>Image Demo</title>
                </head>
                <body>
                    <h1>图片素材</h1>
                    %s
                </body>
            </html>
        `, img)
	})

	// 启动 Web 服务器
	log.Println("Server listening on :8080")
	err := http.ListenAndServe(":8080", nil)
	if err != nil {
		log.Fatal(err)
	}
}

web展示图片--图片文件

import (
	"encoding/base64"
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
)

func main() {
	// 读取图片文件
	imageFile, err := ioutil.ReadFile("/test/123.jpeg")
	if err != nil {
		log.Fatal(err)
	}

	// 注册 HTTP 处理函数
	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		// 设置响应头
		w.Header().Set("Content-Type", "text/html")
		// 编写 HTML 页面
		fmt.Fprintf(w, `
            <!DOCTYPE html>
            <html>
                <head>
                    <title>图片素材</title>
                </head>
                <body>
                    <h1>图片素材</h1>
                    <img src="data:image/jpeg;base64,%s">
                </body>
            </html>
        `, base64.StdEncoding.EncodeToString(imageFile))
	})

	// 启动 Web 服务器
	log.Println("Server listening on :8080")
	err = http.ListenAndServe(":8080", nil)
	if err != nil {
		log.Fatal(err)
	}
}

7.读取yaml配置文件

user.yaml

name: "jeff"
age: 18
other:
  sex: "男"
  like: "篮球"

方法 1--github.com/xbitgo/core/config

package main

import (
	"fmt"
	"github.com/xbitgo/core/config"
)

type Config struct {
	Name  string `yaml:"name"`
	Age   int    `yaml:"age"`
	Other *Other `yaml:"other"`
}
type Other struct {
	Sex  string `yaml:"sex"`
	Like string `yaml:"like"`
}

func main() {
	var Global = &Config{}
	cfg := config.Yaml{ConfigFile: "user.yaml"}
	err := cfg.Apply(Global)
	if err != nil {
		fmt.Println("err:", err.Error())
	}
	fmt.Println(Global)
	fmt.Println(Global.Other)
}

方法 2--viper

func main() {
	viper.SetConfigFile("./user.yaml")
	err := viper.ReadInConfig() // 查找并读取配置文件
	if err != nil {             // 处理读取配置文件的错误
		panic(fmt.Errorf("Fatal error config file: %s \n", err))
	}
	fmt.Println(viper.GetString("name"))
}

方法 3--go-zero/core/conf包

package main

import (
	"flag"
	"fmt"
	"github.com/zeromicro/go-zero/core/conf"
)

type Config struct {
	Name  string
	Age   int
	Other Other
}
type Other struct {
	Sex  string
	Like string
}

func main() {
	var configFile = flag.String("f", "./golang/user.yaml", "the config file")
	var c Config
	MustLoad(*configFile, &c)
	fmt.Println(c)
}

func MustLoad(arg string, rs interface{}) {
	conf.MustLoad(arg, rs)
}

8.mysql bin日志解析

//这将显示数据目录的位置，binlog文件通常位于该目录下
SHOW VARIABLES LIKE 'datadir'; 

package main

import (
	"fmt"
	"github.com/go-mysql-org/go-mysql/replication"
	"time"
)

func main() {
	fileName := "./mysql-bin.001234"
	ParseBinlog(fileName)
}

func ParseBinlog(binlogFile string) {
	binlogParser := replication.NewBinlogParser()
	err := binlogParser.ParseFile(binlogFile, 0, func(event *replication.BinlogEvent) error {
		switch e := event.Event.(type) {
		case *replication.RowsEvent:

			switch event.Header.EventType {
			case replication.DELETE_ROWS_EVENTv0, replication.DELETE_ROWS_EVENTv1, replication.DELETE_ROWS_EVENTv2:
				//delete事件数据    一次批量过多，rows一条记录中有多条，需要解开
				rows := e.Rows[0]
				fmt.Println(rows) //发送chan处理，（写进表或者其他）
				time.Sleep(time.Second * 3)
			case replication.UPDATE_ROWS_EVENTv0, replication.UPDATE_ROWS_EVENTv1, replication.UPDATE_ROWS_EVENTv2:
				//update事件数据
				rows := e.Rows[0]
				fmt.Println(rows) //发送chan处理，（写进表或者其他）
				time.Sleep(time.Second * 3)
			case replication.WRITE_ROWS_EVENTv0, replication.WRITE_ROWS_EVENTv1, replication.WRITE_ROWS_EVENTv2:
				//instert事件
				rows := e.Rows[0]
				fmt.Println(rows) //发送chan处理，（写进表或者其他）
				time.Sleep(time.Second * 3)
			}
		}
		return nil
	},
	)
	fmt.Println(err)
}

9.限频工具

//api限流
func ApiPeriodLimit(uidStr, url string, limitNumberDay, exSecond int) error {
	/*
		uidStr:可以填写uid,没有uid可以填写手机号
		url:路由
		exSecond:访问频率,单位秒
		limitNumber:访问次数限制,单位天
		注：访问数据保留 7 天自动删除

	*/

	/*
		redis的key:
		上次请求记录string--last:{{uid}}:{{url}}  过期时间=exSecond
		日次数hash--apiLimitHash:{{url}}:{{day}}  key=uid,value=次数
		日黑名单hash--backApi:{{url}}:{{day}} key=uid,value=1

		1.日黑名单校验
		2.setnx成功就继续
		3.每次成功请求日次数+1
		4.日次数超过限制，加入日黑名单
	*/

	rdb := config.GetRedis()
	now := time.Now()
	day := now.Format("2006-01-02")

	t, _ := time.ParseInLocation("2006-01-02", day, time.Local)
	exDay := t.AddDate(0, 0, 7) //过期时间7天后

	//1.日黑名单校验
	backApi := fmt.Sprintf("backApi:%s:%s", url, day)
	v, _ := rdb.Hget(backApi, uidStr)
	if v != "" {
		return common.OperateError("今日已超过限制")
	}

	//2.setnx成功就继续
	exKey := fmt.Sprintf("last:%s:%s", uidStr, url)
	boo, _ := rdb.SetnxEx(exKey, "1", exSecond)
	if !boo {
		return common.OperateError("操作频繁 请稍候再试")
	}

	//3.每次成功请求日次数+1，日次数超过限制，加入日黑名单
	apiLimitHash := fmt.Sprintf("apiLimitHash:%s:%s", url, day)
	countStr, _ := rdb.Hget(apiLimitHash, uidStr)
	count, _ := strconv.Atoi(countStr)
	count += 1
	rdb.Hset(apiLimitHash, uidStr, fmt.Sprintf("%d", count))
	rdb.Expireat(apiLimitHash, exDay.Unix())

	//4.日次数超过限制，加入日黑名单
	if count >= limitNumberDay {
		rdb.Hset(backApi, uidStr, "1")
		rdb.Expireat(backApi, exDay.Unix())
	}
	return nil
}

10.频率统计

//频率统计
func ApiRate2(uid int64, url string) error {
	rdb := config.GetRedis()
	userID := fmt.Sprintf("rate:%s:%d", url, uid)
	// 获取当前时间
	now := time.Now().UnixNano()

	// 生成当前时间窗口的起始时间和结束时间
	windowStart := (now) / 1000
	windowEnd := windowStart - 300*(1000000)

	// 移除过期的窗口数据
	rdb.Zremrangebyscore(userID, 0, windowEnd)

	// 增加当前请求的分数，并设置过期时间
	rdb.Zincrby(userID, windowStart, fmt.Sprintf("%d", now))
	rdb.Expire(userID, 300)
	// 获取窗口内的请求次数
	requestCount, err := rdb.Zcount(userID, windowEnd, windowStart)
	if err != nil {
		// 错误处理
		return nil
	}

	// 打印用户每分钟的请求次数
	// 保存次数
	backHash := fmt.Sprintf("backHash:%s", url)
	err = rdb.Hset(backHash, fmt.Sprintf("%d", uid), fmt.Sprintf("%d_%d", requestCount, time.Now().Unix()))
	if err != nil {
		return nil
	}
	// 如果请求次数超过阈值，则拒绝访问
	if requestCount >= 100 {
		key := fmt.Sprintf("%s:%d", limitBlackKey, uid)
		msg := "外挂"
		config.GetRedisLimit().Setex(key, msg, 2*3600)
		return msg)\
	}
	return nil
}

11.golang执行lua脚本操作redis

package main

import (
	"context"
	"fmt"
	"github.com/go-redis/redis/v8"
	"time"
)

func start() {
	// 创建 Redis 客户端
	client := redis.NewClient(&redis.Options{
		Addr:     "localhost:6379", // Redis 服务器地址
		Password: "",               // Redis 密码
		DB:       0,                // Redis 数据库索引
	})

	// 加锁
	key := "mylock"                // 锁的键名
	value := "myvalue"             // 锁的值
	expiration := 10 * time.Second // 锁的过期时间

	success, err := acquireLock(client, key, value, expiration)
	if err != nil {
		fmt.Println("加锁失败:", err)
		return
	}

	if success {
		fmt.Println("加锁成功")
		// 执行加锁成功后的操作
		// ...

		// 解锁
		err := releaseLock(client, key)
		if err != nil {
			fmt.Println("解锁失败:", err)
		} else {
			fmt.Println("解锁成功")
		}
	} else {
		fmt.Println("加锁失败")
	}
}

func acquireLock(client *redis.Client, key string, value string, expiration time.Duration) (bool, error) {
	script := `
local result = redis.call('SET', KEYS[1], ARGV[1], 'NX', 'PX', ARGV[2])
if result then
    return true
else
    return false
end
`
	result, err := client.Eval(context.Background(), script, []string{key}, value, expiration).Bool()
	if err != nil {
		return false, err
	}
	return result, nil
}

func releaseLock(client *redis.Client, key string) error {
	_, err := client.Del(context.Background(), key).Result()
	return err
}

func main() {
	start()
}

12.golang执行lua脚本

package main  
  
import (  
 "fmt"  
 "gopkg.in/koyhoge/lua.v3"  
)  
  
func main() {  
 // 创建Lua状态机  
 l := lua.NewState()  
 defer l.Close()  
  
 // 加载Lua脚本  
 script := `print("Hello from Lua!")`  
  
 // 执行Lua脚本  
 err := l.DoString(script)  
 if err != nil {  
 fmt.Println("执行脚本时出错：", err)  
 return  
 }  
}

13.执行sql

import (
	"database/sql"
	"encoding/json"
	"fmt"
	_ "github.com/go-sql-driver/mysql"
	"github.com/tealeg/xlsx"
)

var DB *sql.DB //全局对象db

// 测试环境直连
func InitDB() (err error) {
	DB, err = sql.Open("mysql", "root:123456@tcp(127.0.0.1:3306)/myself?charset=utf8mb4&interpolateParams=true&parseTime=true&loc=Local")
	if err != nil {
		return err
	}
	err = DB.Ping() //校验数据库连接
	if err != nil {
		return err
	}
	return nil
}
func Insert(i *Data) (r int) {
	sqlstr := `insert into user(name,age,email)
	values('%v','%v','%v','%v','%v','%v')`
	sqlstr = fmt.Sprintf(sqlstr, i.RealName, i.Age, i.Email)
	err := DB.QueryRow(sqlstr).Scan(&r)
	if err != nil {
		fmt.Println(err)
		return
	}
	return
}

14.oss上传工具

var OssClient *AliOSS

func InitOss() {
	AccessKeyId := "AccessKeyId"
	AccessKeySecret := "AccessKeySecret"
	Endpoint := "http://oss-cn-shanghai.aliyuncs.com"
	client, err := NewAliOSS(AliConfig{
		AccessKeyId:     AccessKeyId,
		AccessKeySecret: AccessKeySecret,
		Endpoint:        Endpoint,
	})

	if err != nil {
		panic(err)
	}
	OssClient = client
}


func PutObjectBase64(ctx context.Context, base64Str string, imgName string) (string, error) {
	imgName = fmt.Sprintf("images/%s", imgName)
	// 获取存储空间（Bucket）对象
	bucket, err := OssClient.client.Bucket(bucketName)
	if err != nil {
		fmt.Println("Error getting bucket:", err)
		return "", nil
	}

	sDec, err := base64.StdEncoding.DecodeString(base64Str)
	reader := bytes.NewReader(sDec)
	err = bucket.PutObject(imgName, reader)
	if err != nil {
		fmt.Println("Error uploading file:", err)
		return "", nil
	}
	url := "https://img.xoxox.com/"
	url += imgName
	return url, nil
}

15.Redis 的 WATCH 命令来实现乐观锁

Redis的WATCH命令本身并不是一个原子操作。它仅用于在执行事务期间监视指定的键，以便在事务执行期间检测到键是否被修改。WATCH命令的作用是在执行EXEC命令之前，对被监视的键进行检查，如果在WATCH命令执行后，到EXEC命令执行期间，被监视的键被其他客户端修改了，那么事务将被中断。

package main

import (
	"fmt"
	"log"

	"github.com/go-redis/redis"
)

func main() {
	// 创建 Redis 客户端
	client := redis.NewClient(&redis.Options{
		Addr:     "localhost:6379",
		Password: "", // 如果有密码，填写密码
		DB:       0,  // 选择数据库
	})

	// 监视库存的键
	err := client.Watch(func(tx *redis.Tx) error {
		// 获取当前库存余额
		val, err := tx.Get("stock").Result()
		if err != nil {
			return err
		}
		stock, _ := strconv.Atoi(val)

		// 检查库存是否充足
		if stock > 0 {
			// 执行更新库存的事务
			_, err = tx.TxPipelined(func(pipe redis.Pipeliner) error {
				pipe.Decr("stock")
				return nil
			})
			if err != nil {
				return err
			}
			fmt.Println("库存减少成功！")
		} else {
			fmt.Println("库存不足！")
		}

		return nil
	}, "stock") // 监视库存的键

	if err != nil {
		log.Fatal(err)
	}
}

16.优雅关闭处理

func main() {
	//写入关闭信号
	sigs := make(chan os.Signal, 1)
	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)

	// 监听关闭信号
	go func() {
		sig := <-sigs
		fmt.Println("接收到关闭信号，处理逻辑:", sig)
		// 执行优雅关闭操作
	}()

	select {}
}

python工具

1.excel操作工具

1.1excel转列表

"""
wx_wutu_readnum.xls表
第一列：project_id
第二列：read_num
第三列：like_num
"""
def get_id_excel():
    xlsfile = r"./wx_wutu_readnum.xls"  # 打开指定路径中的xls文件
    file = xlrd.open_workbook(xlsfile)  # 得到Excel文件的book对象，实例化对象

    # 获取sheet
    sheet0 = file.sheets()[0]  # 通过sheet索引顺序获取

    project_id = sheet0.col_values(0)  # 读取第1列
    read_num = sheet0.col_values(1)  # 读取第2列
    like_num = sheet0.col_values(2)  # 读取第3列
    lis = list(zip(project_id, read_num, like_num))
    return lis

1.2.列表写入excel

def index(sql_list, monitor_dic):
    import xlwt
    file = xlwt.Workbook(encoding='utf-8', style_compression=0)
    name = '2020上半年头条阅读为0'
    # 一张表生成不同的sheet
    sheet0 = file.add_sheet(name, cell_overwrite_ok=True)  # 产生表
    sheet0.write(0, 0, 'reserve_id')
    sheet0.write(0, 1, 'project_id')
    sheet0.write(0, 2, 'begin_time')
    sheet0.write(0, 3, 'end_time')
    sheet0.write(0, 4, 'media_id')
    sheet0.write(0, 5, 'media_name')
    sheet0.write(0, 6, 'post_id')
    sheet0.write(0, 7, 'post_title')
    sheet0.write(0, 8, 'view_count')
    sheet0.write(0, 9, 'comment_count')
    for index, test in enumerate(sql_list):
        reserve_id = test[23]
        begin_time = str(test[4])
        end_time = str(test[5])
        media_id = test[8]
        media_name = test[9]
        post_id = test[11]
        post_title = test[12]
        project_id = test[1]
        sheet0.write(index + 1, 0, reserve_id)
        sheet0.write(index + 1, 1, project_id)
        sheet0.write(index + 1, 2, begin_time)
        sheet0.write(index + 1, 3, end_time)
        sheet0.write(index + 1, 4, media_id)
        sheet0.write(index + 1, 5, media_name)
        sheet0.write(index + 1, 6, post_id)
        sheet0.write(index + 1, 7, post_title)
        sheet0.write(index + 1, 8, monitor_dic.get(post_id)[0])
        sheet0.write(index + 1, 9, monitor_dic.get(post_id)[1])
    file.save('2020上半年.xls')

1.3csv转insert(sql)

def get_csv_file(file_path):
    dic_list = []
    with open(file_path, 'r') as f:
        key_list = f.readline().replace('"', "").replace("\n", "").split(",")
        while True:
            dic = {}
            line = f.readline().replace('"', "")
            if len(line) < 1:
                break

            line_list = line.split(",")
            for k, v in enumerate(line_list):
                dic[key_list[k]] = v.replace("\n", "")

            dic_list.append(dic)
    return dic_list


def convert_insert_sql(dic_list, table_name):
    with open('sql.txt', 'w') as f:
        for dic in dic_list:
            keys = ""
            values = ""
            for k in dic:
                v = dic.get(k)
                if v != "NULL":
                    try:
                        v = int(v)
                        values += f'{v},'
                    except Exception as e:
                        values += f"'{v}',"
                else:
                    values += f'{v},'
                keys += f"{k},"
            keys = keys.rstrip(",")
            values = values.rstrip(",")
            sql = f"insert into {table_name}({keys}) values ({values});\n"
            f.write(sql)


if __name__ == '__main__':
    table_name = "users"
    file_path = "/Users/jeff/Desktop/file_test/工具/data.csv"
    li_list = get_csv_file(file_path)
    convert_insert_sql(li_list, table_name)

1.4读取excel,csv

import csv

import xlrd

def get_csv():
    with open('./name.csv', 'r') as f:
        reader = csv.reader(f)
        rows = list(reader)
        dic = {}
        for row in rows[1:len(rows)]:
            dic[row[0]]=row[4]
        return dic

def get_excel():
    xlsfile = r"./name.xlsx"
    file = xlrd.open_workbook(xlsfile)
    sheet0 = file.sheets()[0]
    nrows = sheet0.nrows
    li_list = []
    for i in range(1, nrows):
        row = sheet0.row_values(i)
        li_list.append(int(row[2]))
    return li_list

def main():
    dic = get_csv()
    list = get_excel()
    with open(r"./new.csv","w") as f:
        for no in list:
            last_time = dic.get(str(no))
            f.write(f"{no},{last_time}\n")

if __name__ == '__main__':
    main()

2.文件操作

2.1前后加引号，where in

def main():
    with open(r"./2.txt","w") as k: #新文件
        with open("./1.txt") as f: #源文件
            while True:
                v = f.readline().strip()
                print(v)
                if len(v)<1:
                    return
                k.write(f"'{v}',\n")

3.时间操作

3.1时间范围

# 时间范围
def get_time():
    now = time.time()  # 当前时间戳
    # now = now - 30 * 24 * 60 * 60
    # mon = time.localtime(now)[1]
    # day = time.localtime(now)[2]
    # year = time.localtime(now)[0]
    # end_time = "%s-%s-%s" % (year, mon, day)
    end_time = convert_data_time(now)


    twl = now - 3 * 24 * 60 * 60  # 30天前的时间戳
    # mon1 = time.localtime(twl)[1]  # 从30天前时间结构体中提取月
    # day1 = time.localtime(twl)[2]  # 从30天前时间结构体中提取日
    # year1 = time.localtime(twl)[0]
    # start_time = "%s-%s-%s" % (year1, mon1, day1)
    start_time = convert_data_time(twl)
    return [start_time, end_time]

3.2字符串标准时间转-时间戳

# 转换时间戳
def timestamp(convert_time):
    timeArray = time.strptime(convert_time, "%Y-%m-%d %H:%M:%S")
    timestamp = int(time.mktime(timeArray))
    return timestamp

3.3时间戳转转-标准时间

# 时间戳转换标准时间
def convert_data_time(timeStamp):
    timeArray = time.localtime(timeStamp)
    data_time = time.strftime("%Y-%m-%d %H:%M:%S", timeArray)
    return data_time
  
datetime.datetime.fromtimestamp(时间戳)   # 时间戳转换为datime格式

4.队列工具

4.1.内存队列

# 获取mid队列
def get_mid_queue():
    conn = psycopg2.connect()
    cur = conn.cursor()
    sql = 'select mid from bevoldb.beautiful_shop where id between 80000 and 90000'
    # cur.execute(sql, ['39600'])
    cur.execute(sql)
    mid_list = cur.fetchall()
    mid_queue = Queue()
    for mid in mid_list:
        mid1 = mid[0]
        mid_queue.put(mid1)
    return mid_queue

4.2.多线程配合内存队列

# 新的评论全自动入口
def start_commnet():
    conn = psycopg2.connect()
    cur = conn.cursor()
    for i in range(1, 100):
        a = (i-1)*10000
        b = i*10000
        sql = 'select mid from bevoldb.beautiful_shop where id between {} and {}'.format(a, b)
        cur.execute(sql)
        mid_list = cur.fetchall()
        mid_queue = Queue()
        for mid in mid_list:
            mid1 = mid[0]
            mid_queue.put(mid1)
        for i in range(64):
            save_img = Thread(target=get_commnet, args=(mid_queue,))
            save_img.start()

4.3pika操作MQ（生产者）

def toutiao_win():
    credentials = pika.PlainCredentials('用户名, '密码')  # mq用户名和密码
    # 虚拟队列需要指定参数 virtual_host，如果是默认的可以不填。
    connection = pika.BlockingConnection(
        pika.ConnectionParameters(host='地址', port=端口, virtual_host='/', credentials=credentials))
    channel = connection.channel()

    toutiao_ttcid_scid_token_list, toutiao_p_callback_list, ua_list = get_cookie_list()

    # 声明消息队列，消息将在这个队列传递，如不存在，则创建
    # result = channel.queue_declare(queue='队列名'
    res1 = rds_16_8.sunion("xx","xx")
    a = 0
    for user_id in res1:
        data = ""
        a += 1
        user_id = str(user_id.decode())
        url = ""
        data['url'] = url
        # print(data)
        # if a <= 30000:
        # 向队列插入数值 routing_key是队列名
        channel.basic_publish(exchange='', routing_key='队列名', body=json.dumps(data))
    connection.close()

4.4pika操作MQ（消费者）

def xiaofei_toutiao():
    credentials = pika.PlainCredentials('用户名', '密码')  # mq用户名和密码
    connection = pika.BlockingConnection(
        pika.ConnectionParameters(host='地址', port=端口, virtual_host='/', credentials=credentials))
    channel = connection.channel()

    # 申明消息队列，消息在这个队列传递，如果不存在，则创建队列
    # channel.queue_declare(queue='队列名', durable=False)

    # 定义一个回调函数来处理消息队列中的消息，这里是打印出来
    def callback(ch, method, properties, body):
        ch.basic_ack(delivery_tag=method.delivery_tag)
        k = body.decode()

        user_id = re.search('user_id=(.*?)&', k).group(1)
        rds_16_8.hset('key名', user_id, k)

    # 告诉rabbitmq，用callback来接收消息
    channel.basic_consume('消费队列名', callback)
    # 开始接收信息，并进入阻塞状态，队列里有信息才会调用callback进行处理
    channel.start_consuming()

5.Celery操作

5.1CeleryAPP--MQ创建

from celery import Celery


# 入es的app
ins_data_app = Celery(
    'instagram',
    include=[
        'spider.instagram.spider.task',
    ]
)

ins_data_app.config_from_object(DataEsConfig)


class DataEsConfig(object):
    broker_url = 'amqp://admin:avGX9IHGeUVVcs5B@118.190.112.223:5672/'
    task_ignore_result = True
    task_serializer = 'json'
    accept_content = ['json']
    task_default_queue = 'default'
    task_default_exchange = 'default'
    task_default_routing_key = 'default'

    exchange = Exchange('instagram', type='topic')
    task_queues = [
        Queue(
            'instagram.attention.user.producer',
            [binding(exchange, routing_key='instagram.attention.user.producer')],
            # queue_arguments={'x-queue-mode': 'lazy'}
        ),
        Queue(
            'instagram.attention.data.producer',
            [binding(exchange, routing_key='instagram.attention.data.producer')],
            # queue_arguments={'x-queue-mode': 'lazy'}
        ),
    ]
    task_routes = (data_es_route_task,)
    enable_utc = True
    timezone = "Asia/Shanghai"
    
    
    
from kombu import Exchange, Queue, binding


def data_es_route_task(name, args, kwargs, options, task=None, **kw):
    return {
        'exchange': 'instagram',
        'exchange_type': 'topic',
        'routing_key': name
    }


class DataEsConfig(object):
    broker_url = ''  # 地址
    task_ignore_result = True
    task_serializer = 'json'
    accept_content = ['json']
    task_default_queue = 'default'
    task_default_exchange = 'default'
    task_default_routing_key = 'default'

    exchange = Exchange('instagram', type='topic')
    task_queues = [
        Queue(
            'instagram.attention.user.producer',
            [binding(exchange, routing_key='instagram.attention.user.producer')],
            queue_arguments={'x-queue-mode': 'lazy'}
        ),
        Queue(
            'instagram.attention.data.producer',
            [binding(exchange, routing_key='instagram.attention.data.producer')],
            queue_arguments={'x-queue-mode': 'lazy'}
        ),
    ]
    task_routes = (data_es_route_task,)
    enable_utc = True
    timezone = "Asia/Shanghai"

5.2Celery--APP--MQ使用--消费

# 1.比如从队列里拿出user_id消费
# 2.消费完获取到数据，发送给其他的队列
# 3.入库程序取出数据，入库

@ins_app.task(
    name="instagram.data.user.consumer",  # 队列名称
    bind=True,
    default_retry_delay=5,
    max_retries=3,
)
def start_articles(self, *args, **kwargs):
    id = args[0]
    start_time = time.time()
    articles.go_article(id)   # 方法
    end_time = time.time()
    print('总体响应时间：',end_time-start_time)
    print('=='*50)

5.3Celery--APP--MQ使用--生产

# 发送作者关注数据一页
def send_attention(response):
    dics = filter.attention_filter(response)
    ins_data_app.send_task(
        'instagram.attention.user.producer',
        kwargs={'data': dics, 'post_time': int(time.time())}, retries=1
    )

6.ES操作

6.1es模型类

es_zoo_connection = Elasticsearch('http://用户名:密码@地址:端口', dead_timeout=10, retry_on_timeout=True)
logger = logging.getLogger(__name__)


class ES(object):
    index = None
    doc_type = None
    id_field = '_id'
    version = ''
    source_id_field = ''
    aliase_field = ''
    separator = '-'
    aliase_func = None
    es = None
    tz = pytz.timezone('Asia/Shanghai')
    logger = logger

    @classmethod
    def mget(cls, ids=None, index=None, **kwargs):
        index = index or cls.index
        docs = cls.es.mget(body={'ids': ids}, doc_type=cls.doc_type, index=index, **kwargs)
        return docs

    @classmethod
    def count(cls, query=None, index=None, **kwargs):
        index = index or cls.index
        c = cls.es.count(doc_type=cls.doc_type, body=query, index=index, **kwargs)
        return c.get('count', 0)

    @classmethod
    def upsert(cls, doc, doc_id=None, index=None, doc_as_upsert=True, **kwargs):
        body = {
            "doc": doc,
        }
        if doc_as_upsert:
            body['doc_as_upsert'] = True

        id = doc_id or cls.id_name(doc)
        index = index or cls.index_name(doc)
        cls.es.update(index, id, cls.doc_type, body, **kwargs)

    @classmethod
    def search(cls, index=None, query=None, **kwargs):
        index = index or cls.index
        return cls.es.search(index=index, body=query, **kwargs)

    @classmethod
    def scan(cls, query, index=None, **kwargs):
        return scan(cls.es,
                    query=query,
                    index=index or cls.index,
                    **kwargs)

    @classmethod
    def index_name(cls, doc):
        if cls.aliase_field and cls.aliase_field in doc.keys():
            aliase_part = doc[cls.aliase_field]
            if isinstance(aliase_part, str):
                aliase_part = arrow.get(aliase_part)
            if isinstance(aliase_part, int):
                aliase_part = arrow.get(aliase_part).astimezone(cls.tz)
            if cls.version:
                index = '{}{}{}{}{}'.format(cls.index, cls.separator, cls.version, cls.separator,
                                            cls.aliase_func(aliase_part))
            else:
                index = '{}{}{}'.format(cls.index, cls.separator, cls.aliase_func(aliase_part))
        else:
            index = cls.index
        return index

    @classmethod
    def id_name(cls, doc):
        id = doc.get(cls.id_field) and doc.pop(cls.id_field) or doc.get(cls.source_id_field)
        if not id:
            print('========', doc)
        assert id, 'doc _id must not be None'
        return id

    @classmethod
    def bulk_upsert(cls, docs, **kwargs):
        """
        批量操作文章, 仅支持 index 和 update
        """
        op_type = kwargs.get('op_type') or 'update'
        chunk_size = kwargs.get('chunk_size')
        if op_type == 'update':
            upsert = kwargs.get('upsert', True)
            if upsert is None:
                upsert = True
        else:
            upsert = False
        actions = cls._gen_bulk_actions(docs, cls.index_name, cls.doc_type, cls.id_name, op_type, upsert=upsert)
        result = streaming_bulk(cls.es, actions, chunk_size=chunk_size, raise_on_error=False, raise_on_exception=False,
                                max_retries=5, request_timeout=25)
        return result

    @classmethod
    def _gen_bulk_actions(cls, docs, index_name, doc_type, id_name, op_type, upsert=True, **kwargs):
        assert not upsert or (upsert and op_type == 'update'), 'upsert should use "update" as op_type'

        for doc in docs:
            # 支持 index_name 作为一个工厂函数
            if callable(index_name):
                index = index_name(doc)
            else:
                index = index_name

            if op_type == 'index':
                _source = doc
            elif op_type == 'update' and not upsert:
                _source = {'doc': doc}
            elif op_type == 'update' and upsert:
                _source = {'doc': doc, 'doc_as_upsert': True}
            else:
                continue

            if callable(id_name):
                id = id_name(doc)
            else:
                id = id_name

            # 生成 Bulk 动作
            action = {
                "_op_type": op_type,
                "_index": index,
                "_type": doc_type,
                "_id": id,
                "_source": _source
            }
            yield action


class toutiaoEsUser(ES):
    index = 'user_toutiao-v1_0'
    doc_type = '_doc'
    id_field = '_id'
    source_id_field = 'user_id'
    es = es_zoo_connection


def get_follower_num(user_id):
    try:
        a = toutiaoEsUser.scan(
            query={
                "query": {
                    "match": {
                        "user_id": f"{user_id}"
                    }
                }}
        )
        data = a.__next__()
        follower_num = data.get('_source').get('followers_count')
        return follower_num
    except:
        return None

7.爬虫

7.1下载图片

def download_image(dirname, video_id, image_url):
    """
    dirname:目录名字
    video_id:保存图片到名字
    image_url:图片下载地址
    """
    video_id = str(video_id).strip()
    BASE_PATH = os.path.join(os.path.dirname(os.path.dirname(__file__)), "image", dirname)
    if not os.path.isdir(BASE_PATH):
        os.mkdir(BASE_PATH)
    image_path = os.path.join(BASE_PATH, video_id)+".jpg"
    for i in range(10):
        try:
            response = requests.get(image_url, timeout=10)
            if response.status_code != 200:
                continue
            data = response.iter_content()
            with open(image_path, 'wb')as f:
                for line in data:
                    f.write(line)
                f.close()
            break
        except Exception as e:
            print(e)
            print(image_url)
            continue
posted @ 2020-09-22 14:34  Jeff的技术栈  阅读(105)  评论(0)  编辑  收藏  举报
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