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dff78d82ce
* v2: housekeeping: update tools * v2: housekeeping: adhere to US locale in spelling * v2: housekeeping: simplify code
132 lines
3.4 KiB
Go
132 lines
3.4 KiB
Go
// Copyright 2015 Matthew Holt and The Caddy Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package logging
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import (
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"fmt"
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"io"
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"os"
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"path/filepath"
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"github.com/caddyserver/caddy/v2"
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"gopkg.in/natefinch/lumberjack.v2"
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)
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func init() {
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caddy.RegisterModule(FileWriter{})
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}
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// FileWriter can write logs to files. By default, log files
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// are rotated ("rolled") when they get large, and old log
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// files get deleted, to ensure that the process does not
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// exhaust disk space.
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type FileWriter struct {
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// Filename is the name of the file to write.
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Filename string `json:"filename,omitempty"`
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// Roll toggles log rolling or rotation, which is
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// enabled by default.
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Roll *bool `json:"roll,omitempty"`
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// When a log file reaches approximately this size,
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// it will be rotated.
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RollSizeMB int `json:"roll_size_mb,omitempty"`
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// Whether to compress rolled files. Default: true
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RollCompress *bool `json:"roll_gzip,omitempty"`
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// Whether to use local timestamps in rolled filenames.
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// Default: false
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RollLocalTime bool `json:"roll_local_time,omitempty"`
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// The maximum number of rolled log files to keep.
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// Default: 10
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RollKeep int `json:"roll_keep,omitempty"`
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// How many days to keep rolled log files. Default: 90
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RollKeepDays int `json:"roll_keep_days,omitempty"`
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}
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// CaddyModule returns the Caddy module information.
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func (FileWriter) CaddyModule() caddy.ModuleInfo {
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return caddy.ModuleInfo{
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ID: "caddy.logging.writers.file",
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New: func() caddy.Module { return new(FileWriter) },
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}
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}
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// Provision sets up the module
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func (fw *FileWriter) Provision(ctx caddy.Context) error {
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// Replace placeholder in filename
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repl := caddy.NewReplacer()
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filename, err := repl.ReplaceOrErr(fw.Filename, true, true)
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if err != nil {
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return fmt.Errorf("invalid filename for log file: %v", err)
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}
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fw.Filename = filename
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return nil
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}
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func (fw FileWriter) String() string {
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fpath, err := filepath.Abs(fw.Filename)
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if err == nil {
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return fpath
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}
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return fw.Filename
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}
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// WriterKey returns a unique key representing this fw.
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func (fw FileWriter) WriterKey() string {
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return "file:" + fw.Filename
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}
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// OpenWriter opens a new file writer.
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func (fw FileWriter) OpenWriter() (io.WriteCloser, error) {
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// roll log files by default
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if fw.Roll == nil || *fw.Roll {
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if fw.RollSizeMB == 0 {
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fw.RollSizeMB = 100
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}
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if fw.RollCompress == nil {
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compress := true
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fw.RollCompress = &compress
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}
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if fw.RollKeep == 0 {
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fw.RollKeep = 10
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}
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if fw.RollKeepDays == 0 {
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fw.RollKeepDays = 90
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}
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return &lumberjack.Logger{
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Filename: fw.Filename,
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MaxSize: fw.RollSizeMB,
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MaxAge: fw.RollKeepDays,
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MaxBackups: fw.RollKeep,
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LocalTime: fw.RollLocalTime,
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Compress: *fw.RollCompress,
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}, nil
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}
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// otherwise just open a regular file
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return os.OpenFile(fw.Filename, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0666)
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}
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// Interface guards
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var (
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_ caddy.Provisioner = (*FileWriter)(nil)
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)
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