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file.go
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file.go
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package pkg
import (
"bufio"
"bytes"
"context"
"fmt"
"io"
"log"
"os"
"path/filepath"
"strings"
"time"
)
// PathCreate create path
func PathCreate(dir string) error {
return os.MkdirAll(dir, os.ModePerm)
}
// PathExist path exist
func PathExist(addr string) bool {
s, err := os.Stat(addr)
if err != nil {
return false
}
return s.IsDir()
}
func FileOpen(content bytes.Buffer, name string, mode os.FileMode) error {
file, err := os.OpenFile(name, os.O_RDWR|os.O_CREATE|os.O_TRUNC, mode)
if err != nil {
log.Println(err)
return err
}
defer file.Close()
changeStr := strings.ReplaceAll(content.String(), `\$`, `$`)
changeStr = strings.ReplaceAll(changeStr, `\}`, "}")
changeStr = strings.ReplaceAll(changeStr, `\{`, "{")
_, err = file.WriteString(changeStr)
if err != nil {
log.Println(err)
}
return err
}
// FileCreate create file
func FileCreate(content bytes.Buffer, name string) error {
return FileOpen(content, name, 0666)
}
type ReplaceHelper struct {
// Root path
Root string
// OldText need to replace text
OldText string
// NewText new text
NewText string
}
func (h *ReplaceHelper) DoWork() error {
return filepath.Walk(h.Root, h.walkCallback)
}
func (h *ReplaceHelper) walkCallback(path string, f os.FileInfo, err error) error {
if err != nil {
return err
}
if f == nil {
return nil
}
if f.IsDir() {
log.Println("DIR:", path)
return nil
}
buf, err := os.ReadFile(path)
if err != nil {
return err
}
content := string(buf)
log.Printf("h.OldText: %s \n", h.OldText)
log.Printf("h.NewText: %s \n", h.NewText)
//替换
newContent := strings.Replace(content, h.OldText, h.NewText, -1)
//重新写入
err = os.WriteFile(path, []byte(newContent), 0)
if err != nil {
return err
}
return err
}
func FileMonitoringById(ctx context.Context, filePth string, id string, group string, hook func(context.Context, string, string, []byte)) {
f, err := os.Open(filePth)
if err != nil {
log.Fatalln(err)
}
defer func(f *os.File) {
err := f.Close()
if err != nil {
log.Fatalln(err)
}
}(f)
rd := bufio.NewReader(f)
_, err = f.Seek(0, 2)
if err != nil {
return
}
for {
if ctx.Err() != nil {
break
}
line, err := rd.ReadBytes('\n')
// 如果是文件末尾不返回
if err == io.EOF {
time.Sleep(500 * time.Millisecond)
continue
} else if err != nil {
log.Fatalln(err)
}
go hook(ctx, id, group, line)
}
}
// GetFileSize 获取文件大小
func GetFileSize(filename string) int64 {
var result int64
err := filepath.Walk(filename, func(path string, f os.FileInfo, err error) error {
result = f.Size()
return nil
})
if err != nil {
log.Println(err)
return 0
}
return result
}
// GetCurrentPath 获取当前路径,比如:E:/abc/data/test
func GetCurrentPath() string {
dir, err := os.Getwd()
if err != nil {
fmt.Println(err)
}
return strings.Replace(dir, "\\", "/", -1)
}
// FileCopy copy file
func FileCopy(src, dst string) (int64, error) {
sourceFileStat, err := os.Stat(src)
if err != nil {
return 0, err
}
if !sourceFileStat.Mode().IsRegular() {
return 0, fmt.Errorf("%s is not a regular file", src)
}
source, err := os.Open(src)
if err != nil {
return 0, err
}
defer source.Close()
destination, err := os.OpenFile(dst, os.O_RDWR|os.O_CREATE|os.O_TRUNC, sourceFileStat.Mode())
if err != nil {
return 0, err
}
defer destination.Close()
nBytes, err := io.Copy(destination, source)
return nBytes, err
}
// GetSubPath get directory's subject path
func GetSubPath(directory string) ([]string, error) {
dirs, err := os.ReadDir(directory)
if err != nil {
return nil, err
}
subPath := make([]string, 0)
for i := range dirs {
if dirs[i].IsDir() {
subPath = append(subPath, dirs[i].Name())
}
}
return subPath, nil
}
func substr(s string, pos, length int) string {
runes := []rune(s)
l := pos + length
if l > len(runes) {
l = len(runes)
}
return string(runes[pos:l])
}