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ce7d3db1be
* Use new subdirectives and flatten rolling config * Set default rotate config * Set default rolling config (hopefully) errwhere * Make private * Flatten errors directive and remove c.IncrNest() * Don't skip first error log roller subdirective we see * Remove hadBlock * Try lumberjack import * Unname import
101 lines
2.5 KiB
Go
101 lines
2.5 KiB
Go
package httpserver
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import (
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"io"
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"path/filepath"
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"strconv"
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"gopkg.in/natefinch/lumberjack.v2"
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)
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// LogRoller implements a type that provides a rolling logger.
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type LogRoller struct {
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Filename string
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MaxSize int
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MaxAge int
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MaxBackups int
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LocalTime bool
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}
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// GetLogWriter returns an io.Writer that writes to a rolling logger.
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// This should be called only from the main goroutine (like during
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// server setup) because this method is not thread-safe; it is careful
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// to create only one log writer per log file, even if the log file
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// is shared by different sites or middlewares. This ensures that
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// rolling is synchronized, since a process (or multiple processes)
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// should not create more than one roller on the same file at the
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// same time. See issue #1363.
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func (l LogRoller) GetLogWriter() io.Writer {
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absPath, err := filepath.Abs(l.Filename)
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if err != nil {
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absPath = l.Filename // oh well, hopefully they're consistent in how they specify the filename
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}
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lj, has := lumberjacks[absPath]
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if !has {
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lj = &lumberjack.Logger{
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Filename: l.Filename,
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MaxSize: l.MaxSize,
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MaxAge: l.MaxAge,
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MaxBackups: l.MaxBackups,
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LocalTime: l.LocalTime,
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}
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lumberjacks[absPath] = lj
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}
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return lj
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}
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// IsLogRollerSubdirective is true if the subdirective is for the log roller.
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func IsLogRollerSubdirective(subdir string) bool {
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return subdir == directiveRotateSize ||
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subdir == directiveRotateAge ||
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subdir == directiveRotateKeep
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}
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// ParseRoller parses roller contents out of c.
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func ParseRoller(l *LogRoller, what string, where string) error {
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if l == nil {
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l = DefaultLogRoller()
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}
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var value int
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var err error
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value, err = strconv.Atoi(where)
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if err != nil {
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return err
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}
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switch what {
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case directiveRotateSize:
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l.MaxSize = value
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case directiveRotateAge:
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l.MaxAge = value
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case directiveRotateKeep:
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l.MaxBackups = value
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}
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return nil
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}
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// DefaultLogRoller will roll logs by default.
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func DefaultLogRoller() *LogRoller {
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return &LogRoller{
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MaxSize: defaultRotateSize,
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MaxAge: defaultRotateAge,
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MaxBackups: defaultRotateKeep,
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LocalTime: true,
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}
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}
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const (
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// defaultRotateSize is 100 MB.
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defaultRotateSize = 100
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// defaultRotateAge is 14 days.
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defaultRotateAge = 14
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// defaultRotateKeep is 10 files.
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defaultRotateKeep = 10
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directiveRotateSize = "rotate_size"
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directiveRotateAge = "rotate_age"
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directiveRotateKeep = "rotate_keep"
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)
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// lumberjacks maps log filenames to the logger
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// that is being used to keep them rolled/maintained.
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var lumberjacks = make(map[string]*lumberjack.Logger)
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