mirror of
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69 lines
1.3 KiB
Go
69 lines
1.3 KiB
Go
package accesslog
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import (
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"fmt"
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"os"
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"path"
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"sync"
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"github.com/yusing/go-proxy/internal/logging"
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"github.com/yusing/go-proxy/internal/task"
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"github.com/yusing/go-proxy/internal/utils"
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)
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type File struct {
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*os.File
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sync.Mutex
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// os.File.Name() may not equal to key of `openedFiles`.
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// Store it for later delete from `openedFiles`.
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path string
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refCount *utils.RefCount
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}
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var (
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openedFiles = make(map[string]*File)
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openedFilesMu sync.Mutex
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)
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func NewFileAccessLogger(parent task.Parent, cfg *Config) (*AccessLogger, error) {
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openedFilesMu.Lock()
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var file *File
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path := path.Clean(cfg.Path)
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if opened, ok := openedFiles[path]; ok {
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opened.refCount.Add()
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file = opened
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} else {
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f, err := os.OpenFile(cfg.Path, os.O_APPEND|os.O_CREATE|os.O_RDWR, 0o644)
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if err != nil {
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openedFilesMu.Unlock()
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return nil, fmt.Errorf("access log open error: %w", err)
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}
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file = &File{File: f, path: path, refCount: utils.NewRefCounter()}
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openedFiles[path] = file
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go file.closeOnZero()
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}
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openedFilesMu.Unlock()
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return NewAccessLogger(parent, file, cfg), nil
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}
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func (f *File) Close() error {
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f.refCount.Sub()
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return nil
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}
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func (f *File) closeOnZero() {
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defer logging.Debug().
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Str("path", f.path).
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Msg("access log closed")
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<-f.refCount.Zero()
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openedFilesMu.Lock()
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delete(openedFiles, f.path)
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openedFilesMu.Unlock()
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f.File.Close()
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}
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