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structs.go
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structs.go
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package fsnotify
import (
"context"
"encoding/json"
"errors"
"github.com/fsnotify/fsnotify"
"github.com/lifei6671/fsnotify-sync/internal/ioutils"
"github.com/lifei6671/fsnotify-sync/internal/log"
"gopkg.in/ini.v1"
"io/fs"
"os"
"path/filepath"
"strconv"
"strings"
"sync"
"time"
)
func LoadFromFile(configFile string) ([]*Rule, error) {
cfg, err := ini.ShadowLoad(configFile)
//err = yaml.Unmarshal(b, &rule)
if err != nil {
log.Logger.Errorf("解析配置文件失败 -> %s - %+v", configFile, err)
return nil, err
}
rules := make([]*Rule, 0)
for _, section := range cfg.Sections() {
if section.Name() == ini.DefaultSection || strings.Contains(section.Name(), ".") {
continue
}
rule := &Rule{
Name: section.Name(),
Gid: cfg.Section("").Key("gid").MustInt(),
Uid: cfg.Section("").Key("uid").MustInt(),
Recursion: cfg.Section("").Key("recursion").MustBool(true),
}
perm, err := strconv.ParseInt(cfg.Section("").Key("file_perm").String(), 8, 0)
if err != nil {
log.Logger.Fatalf("解析文件权限失败 -> %s - %+v", cfg.Section("").Key("file_perm").String(), err)
}
rule.FilePerm = uint32(perm)
perm, err = strconv.ParseInt(cfg.Section("").Key("dir_perm").String(), 8, 0)
if err != nil {
log.Logger.Fatalf("解析目录权限失败 -> %s - %+v", cfg.Section("").Key("file_perm").String(), err)
}
rule.DirPerm = uint32(perm)
err = cfg.Section(section.Name()).MapTo(rule)
if err != nil {
log.Logger.Errorf("解析配置文件失败 -> %s - %+v", section.Name(), err)
return nil, err
}
if cfg.Section(section.Name()).HasKey("file_perm") {
perm, err := strconv.ParseInt(cfg.Section(section.Name()).Key("file_perm").String(), 8, 0)
if err != nil {
log.Logger.Fatalf("解析文件权限失败 -> %s - %+v", cfg.Section("").Key("file_perm").String(), err)
}
rule.FilePerm = uint32(perm)
}
if cfg.Section(section.Name()).HasKey("dir_perm") {
perm, err = strconv.ParseInt(cfg.Section(section.Name()).Key("dir_perm").String(), 8, 0)
if err != nil {
log.Logger.Fatalf("解析目录权限失败 -> %s - %+v", cfg.Section("").Key("file_perm").String(), err)
}
rule.DirPerm = uint32(perm)
}
cur := cfg.Section(section.Name() + ".files")
rule.Files = cur.KeysHash()
rule.Ignore = cfg.Section(section.Name() + ".ignore").Key("ignore").ValueWithShadows()
rules = append(rules, rule)
}
return rules, err
}
type Rule struct {
Name string `ini:"-"`
Root string `ini:"root"`
Recursion bool `ini:"recursion"`
Gid int `ini:"gid"`
Uid int `ini:"uid"`
FilePerm uint32 `ini:"-"`
DirPerm uint32 `ini:"-"`
Files map[string]string `ini:"files,,delim"`
Ignore []string `ini:"ignore,omitempty,allowshadow"`
ch chan fsnotify.Event `ini:"-"`
isInit bool `ini:"-"`
watcher *fsnotify.Watcher `ini:"-"`
eventTime *sync.Map
}
func (r *Rule) Watcher(ctx context.Context) error {
if f, err := os.Stat(r.Root); err != nil || os.IsNotExist(err) || !f.IsDir() {
return errors.New("指定的路径不存在或不是目录 ->" + r.Root)
}
r.init()
watcher, err := fsnotify.NewWatcher()
if err != nil {
log.Logger.Errorf("创建监听器失败 -> %s - %+v", r.Root, err)
return err
}
r.watcher = watcher
if r.Recursion {
err = filepath.WalkDir(r.Root, func(path string, d fs.DirEntry, err error) error {
if d.IsDir() {
if r.ignore(path) {
return nil
}
err = watcher.Add(path)
if err != nil {
log.Logger.Errorf("添加监听目录失败 -> %s - %+v", r.Root, err)
return err
}
log.Logger.Infof("添加监听目录 -> %s", path)
}
return nil
})
if err != nil {
log.Logger.Errorf("遍历目录失败 ->%s - %+v", r.Root, err)
}
} else {
err = watcher.Add(r.Root)
if err != nil {
log.Logger.Errorf("添加监听目录失败 -> %s - %+v", r.Root, err)
return err
}
log.Logger.Infof("添加监听目录 -> %s", r.Root)
}
defer ioutils.Close(watcher)
go r.handler(ctx)
for {
select {
case event, ok := <-watcher.Events:
if !ok {
return nil
}
if r.ignore(event.Name) {
log.Logger.Infof("跳过忽略文件 -> %s", event.Name)
continue
}
if ioutils.IsDir(event.Name) {
log.Logger.Infof("增加监听目录 -> %s", event.Name)
_ = watcher.Add(event.Name)
continue
}
if event.Op&fsnotify.Write == fsnotify.Write ||
event.Op&fsnotify.Create == fsnotify.Create ||
event.Op&fsnotify.Remove == fsnotify.Remove ||
event.Op&fsnotify.Chmod == fsnotify.Chmod ||
event.Op&fsnotify.Rename == fsnotify.Rename {
mt := ioutils.GetFileModTime(event.Name)
if mt == r.getFileModTime(event.Name) {
log.Logger.Infof("跳过修改时间不变的文件 -> %s:%d", event.Name, mt)
continue
}
r.eventTime.Store(event.Name, mt)
log.Logger.Infof("file changed -> %s %d", event.Name, mt)
r.ch <- event
}
case err := <-watcher.Errors:
log.Logger.Errorf("出现未处理异常 -> %+v", r.Name, err)
case <-ctx.Done():
return ctx.Err()
}
}
}
func (r *Rule) handler(ctx context.Context) {
for {
select {
case event, ok := <-r.ch:
if !ok {
return
}
dstFile := r.parse(event.Name)
if event.Op&fsnotify.Remove == fsnotify.Remove {
err := os.Remove(dstFile)
if err != nil {
log.Logger.Errorf("删除文件失败 -> %s - %s - %+v", event.Name, dstFile, err)
}
continue
}
time.Sleep(time.Millisecond * 100)
_ = r.createDir(dstFile)
//如果是个目录则要创建目录
if ioutils.IsFile(event.Name) {
_, err := ioutils.CopyFile(dstFile, event.Name, fs.FileMode(r.FilePerm))
if err != nil {
log.Logger.Errorf("复制文件失败 -> %s - %s - %+v", event.Name, dstFile, err)
continue
}
} else {
continue
}
err := os.Chown(dstFile, r.Uid, r.Gid)
if err != nil {
log.Logger.Errorf("修改文件所有者失败 -> %s - %s - %+v", event.Name, dstFile, err)
continue
}
err = os.Chmod(dstFile, fs.FileMode(r.DirPerm).Perm())
if err != nil {
log.Logger.Errorf("修改文件权限失败 -> %s - %+v", dstFile, err)
continue
}
log.Logger.Infof("文件或目录复制成功-> %s -> %s:%04o", event.Name, dstFile, r.FilePerm)
case <-ctx.Done():
return
}
}
}
func (r *Rule) init() {
if r.isInit {
return
}
r.eventTime = &sync.Map{}
defer func() {
r.isInit = true
}()
files := make(map[string]string, len(r.Files))
for local, remote := range r.Files {
files[filepath.Join(r.Root, local)] = remote
}
r.Files = files
ignores := make([]string, len(r.Ignore))
for i, filename := range r.Ignore {
ignores[i] = filepath.Join(r.Root, filename)
}
r.Ignore = ignores
if r.ch == nil {
r.ch = make(chan fsnotify.Event, 500)
}
}
//解析出来最匹配的最长路径.
func (r *Rule) parse(src string) string {
var dstFile string
var n int
for local, remote := range r.Files {
if ioutils.IsFile(local) && filepath.Base(local) == filepath.Base(src) {
return remote
}
local = strings.TrimSuffix(local, "*")
if strings.HasPrefix(src, local) && len(local) > n {
n = len(local)
dstFile = filepath.Join(remote, strings.TrimPrefix(src, local))
}
}
return dstFile
}
//判断是否是忽略文件.
func (r *Rule) ignore(filename string) bool {
for _, f := range r.Ignore {
f = strings.TrimSuffix(f, "*")
if strings.HasPrefix(filename, f) {
return true
}
}
return false
}
func (r *Rule) createDir(filename string) error {
var dstDir string
if ioutils.IsDir(filename) {
dstDir = filename
} else {
dstDir = filepath.Dir(filename)
}
if ioutils.FileExist(dstDir) {
return nil
}
err := os.MkdirAll(dstDir, fs.FileMode(r.DirPerm))
if err != nil {
log.Logger.Errorf("创建目录失败 -> %s - %s - %+v", filename, dstDir, err)
return err
}
err = os.Chown(dstDir, r.Uid, r.Gid)
if err != nil {
log.Logger.Errorf("修改文件所有者失败 -> %s - %s - %+v", filename, dstDir, err)
return err
}
return err
}
func (r *Rule) getFileModTime(filename string) int64 {
if v, ok := r.eventTime.Load(filename); ok {
return v.(int64)
}
return 0
}
func (r *Rule) String() string {
b, _ := json.Marshal(r)
return string(b)
}