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winlin 2021-03-04 13:23:01 +08:00
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The MIT License (MIT)
Copyright (c) 2013-2017 winlin
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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Copyright (c) 2015, Dave Cheney <dave@cheney.net>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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# errors [![Travis-CI](https://travis-ci.org/pkg/errors.svg)](https://travis-ci.org/pkg/errors) [![AppVeyor](https://ci.appveyor.com/api/projects/status/b98mptawhudj53ep/branch/master?svg=true)](https://ci.appveyor.com/project/davecheney/errors/branch/master) [![GoDoc](https://godoc.org/github.com/pkg/errors?status.svg)](http://godoc.org/github.com/pkg/errors) [![Report card](https://goreportcard.com/badge/github.com/pkg/errors)](https://goreportcard.com/report/github.com/pkg/errors)
Package errors provides simple error handling primitives.
`go get github.com/pkg/errors`
The traditional error handling idiom in Go is roughly akin to
```go
if err != nil {
return err
}
```
which applied recursively up the call stack results in error reports without context or debugging information. The errors package allows programmers to add context to the failure path in their code in a way that does not destroy the original value of the error.
## Adding context to an error
The errors.Wrap function returns a new error that adds context to the original error. For example
```go
_, err := ioutil.ReadAll(r)
if err != nil {
return errors.Wrap(err, "read failed")
}
```
## Retrieving the cause of an error
Using `errors.Wrap` constructs a stack of errors, adding context to the preceding error. Depending on the nature of the error it may be necessary to reverse the operation of errors.Wrap to retrieve the original error for inspection. Any error value which implements this interface can be inspected by `errors.Cause`.
```go
type causer interface {
Cause() error
}
```
`errors.Cause` will recursively retrieve the topmost error which does not implement `causer`, which is assumed to be the original cause. For example:
```go
switch err := errors.Cause(err).(type) {
case *MyError:
// handle specifically
default:
// unknown error
}
```
[Read the package documentation for more information](https://godoc.org/github.com/pkg/errors).
## Contributing
We welcome pull requests, bug fixes and issue reports. With that said, the bar for adding new symbols to this package is intentionally set high.
Before proposing a change, please discuss your change by raising an issue.
## Licence
BSD-2-Clause

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// Package errors provides simple error handling primitives.
//
// The traditional error handling idiom in Go is roughly akin to
//
// if err != nil {
// return err
// }
//
// which applied recursively up the call stack results in error reports
// without context or debugging information. The errors package allows
// programmers to add context to the failure path in their code in a way
// that does not destroy the original value of the error.
//
// Adding context to an error
//
// The errors.Wrap function returns a new error that adds context to the
// original error by recording a stack trace at the point Wrap is called,
// and the supplied message. For example
//
// _, err := ioutil.ReadAll(r)
// if err != nil {
// return errors.Wrap(err, "read failed")
// }
//
// If additional control is required the errors.WithStack and errors.WithMessage
// functions destructure errors.Wrap into its component operations of annotating
// an error with a stack trace and an a message, respectively.
//
// Retrieving the cause of an error
//
// Using errors.Wrap constructs a stack of errors, adding context to the
// preceding error. Depending on the nature of the error it may be necessary
// to reverse the operation of errors.Wrap to retrieve the original error
// for inspection. Any error value which implements this interface
//
// type causer interface {
// Cause() error
// }
//
// can be inspected by errors.Cause. errors.Cause will recursively retrieve
// the topmost error which does not implement causer, which is assumed to be
// the original cause. For example:
//
// switch err := errors.Cause(err).(type) {
// case *MyError:
// // handle specifically
// default:
// // unknown error
// }
//
// causer interface is not exported by this package, but is considered a part
// of stable public API.
//
// Formatted printing of errors
//
// All error values returned from this package implement fmt.Formatter and can
// be formatted by the fmt package. The following verbs are supported
//
// %s print the error. If the error has a Cause it will be
// printed recursively
// %v see %s
// %+v extended format. Each Frame of the error's StackTrace will
// be printed in detail.
//
// Retrieving the stack trace of an error or wrapper
//
// New, Errorf, Wrap, and Wrapf record a stack trace at the point they are
// invoked. This information can be retrieved with the following interface.
//
// type stackTracer interface {
// StackTrace() errors.StackTrace
// }
//
// Where errors.StackTrace is defined as
//
// type StackTrace []Frame
//
// The Frame type represents a call site in the stack trace. Frame supports
// the fmt.Formatter interface that can be used for printing information about
// the stack trace of this error. For example:
//
// if err, ok := err.(stackTracer); ok {
// for _, f := range err.StackTrace() {
// fmt.Printf("%+s:%d", f)
// }
// }
//
// stackTracer interface is not exported by this package, but is considered a part
// of stable public API.
//
// See the documentation for Frame.Format for more details.
// Fork from https://github.com/pkg/errors
package errors
import (
"fmt"
"io"
)
// New returns an error with the supplied message.
// New also records the stack trace at the point it was called.
func New(message string) error {
return &fundamental{
msg: message,
stack: callers(),
}
}
// Errorf formats according to a format specifier and returns the string
// as a value that satisfies error.
// Errorf also records the stack trace at the point it was called.
func Errorf(format string, args ...interface{}) error {
return &fundamental{
msg: fmt.Sprintf(format, args...),
stack: callers(),
}
}
// fundamental is an error that has a message and a stack, but no caller.
type fundamental struct {
msg string
*stack
}
func (f *fundamental) Error() string { return f.msg }
func (f *fundamental) Format(s fmt.State, verb rune) {
switch verb {
case 'v':
if s.Flag('+') {
io.WriteString(s, f.msg)
f.stack.Format(s, verb)
return
}
fallthrough
case 's':
io.WriteString(s, f.msg)
case 'q':
fmt.Fprintf(s, "%q", f.msg)
}
}
// WithStack annotates err with a stack trace at the point WithStack was called.
// If err is nil, WithStack returns nil.
func WithStack(err error) error {
if err == nil {
return nil
}
return &withStack{
err,
callers(),
}
}
type withStack struct {
error
*stack
}
func (w *withStack) Cause() error { return w.error }
func (w *withStack) Format(s fmt.State, verb rune) {
switch verb {
case 'v':
if s.Flag('+') {
fmt.Fprintf(s, "%+v", w.Cause())
w.stack.Format(s, verb)
return
}
fallthrough
case 's':
io.WriteString(s, w.Error())
case 'q':
fmt.Fprintf(s, "%q", w.Error())
}
}
// Wrap returns an error annotating err with a stack trace
// at the point Wrap is called, and the supplied message.
// If err is nil, Wrap returns nil.
func Wrap(err error, message string) error {
if err == nil {
return nil
}
err = &withMessage{
cause: err,
msg: message,
}
return &withStack{
err,
callers(),
}
}
// Wrapf returns an error annotating err with a stack trace
// at the point Wrapf is call, and the format specifier.
// If err is nil, Wrapf returns nil.
func Wrapf(err error, format string, args ...interface{}) error {
if err == nil {
return nil
}
err = &withMessage{
cause: err,
msg: fmt.Sprintf(format, args...),
}
return &withStack{
err,
callers(),
}
}
// WithMessage annotates err with a new message.
// If err is nil, WithMessage returns nil.
func WithMessage(err error, message string) error {
if err == nil {
return nil
}
return &withMessage{
cause: err,
msg: message,
}
}
type withMessage struct {
cause error
msg string
}
func (w *withMessage) Error() string { return w.msg + ": " + w.cause.Error() }
func (w *withMessage) Cause() error { return w.cause }
func (w *withMessage) Format(s fmt.State, verb rune) {
switch verb {
case 'v':
if s.Flag('+') {
fmt.Fprintf(s, "%+v\n", w.Cause())
io.WriteString(s, w.msg)
return
}
fallthrough
case 's', 'q':
io.WriteString(s, w.Error())
}
}
// Cause returns the underlying cause of the error, if possible.
// An error value has a cause if it implements the following
// interface:
//
// type causer interface {
// Cause() error
// }
//
// If the error does not implement Cause, the original error will
// be returned. If the error is nil, nil will be returned without further
// investigation.
func Cause(err error) error {
type causer interface {
Cause() error
}
for err != nil {
cause, ok := err.(causer)
if !ok {
break
}
err = cause.Cause()
}
return err
}

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// Fork from https://github.com/pkg/errors
package errors
import (
"fmt"
"io"
"path"
"runtime"
"strings"
)
// Frame represents a program counter inside a stack frame.
type Frame uintptr
// pc returns the program counter for this frame;
// multiple frames may have the same PC value.
func (f Frame) pc() uintptr { return uintptr(f) - 1 }
// file returns the full path to the file that contains the
// function for this Frame's pc.
func (f Frame) file() string {
fn := runtime.FuncForPC(f.pc())
if fn == nil {
return "unknown"
}
file, _ := fn.FileLine(f.pc())
return file
}
// line returns the line number of source code of the
// function for this Frame's pc.
func (f Frame) line() int {
fn := runtime.FuncForPC(f.pc())
if fn == nil {
return 0
}
_, line := fn.FileLine(f.pc())
return line
}
// Format formats the frame according to the fmt.Formatter interface.
//
// %s source file
// %d source line
// %n function name
// %v equivalent to %s:%d
//
// Format accepts flags that alter the printing of some verbs, as follows:
//
// %+s path of source file relative to the compile time GOPATH
// %+v equivalent to %+s:%d
func (f Frame) Format(s fmt.State, verb rune) {
switch verb {
case 's':
switch {
case s.Flag('+'):
pc := f.pc()
fn := runtime.FuncForPC(pc)
if fn == nil {
io.WriteString(s, "unknown")
} else {
file, _ := fn.FileLine(pc)
fmt.Fprintf(s, "%s\n\t%s", fn.Name(), file)
}
default:
io.WriteString(s, path.Base(f.file()))
}
case 'd':
fmt.Fprintf(s, "%d", f.line())
case 'n':
name := runtime.FuncForPC(f.pc()).Name()
io.WriteString(s, funcname(name))
case 'v':
f.Format(s, 's')
io.WriteString(s, ":")
f.Format(s, 'd')
}
}
// StackTrace is stack of Frames from innermost (newest) to outermost (oldest).
type StackTrace []Frame
// Format formats the stack of Frames according to the fmt.Formatter interface.
//
// %s lists source files for each Frame in the stack
// %v lists the source file and line number for each Frame in the stack
//
// Format accepts flags that alter the printing of some verbs, as follows:
//
// %+v Prints filename, function, and line number for each Frame in the stack.
func (st StackTrace) Format(s fmt.State, verb rune) {
switch verb {
case 'v':
switch {
case s.Flag('+'):
for _, f := range st {
fmt.Fprintf(s, "\n%+v", f)
}
case s.Flag('#'):
fmt.Fprintf(s, "%#v", []Frame(st))
default:
fmt.Fprintf(s, "%v", []Frame(st))
}
case 's':
fmt.Fprintf(s, "%s", []Frame(st))
}
}
// stack represents a stack of program counters.
type stack []uintptr
func (s *stack) Format(st fmt.State, verb rune) {
switch verb {
case 'v':
switch {
case st.Flag('+'):
for _, pc := range *s {
f := Frame(pc)
fmt.Fprintf(st, "\n%+v", f)
}
}
}
}
func (s *stack) StackTrace() StackTrace {
f := make([]Frame, len(*s))
for i := 0; i < len(f); i++ {
f[i] = Frame((*s)[i])
}
return f
}
func callers() *stack {
const depth = 32
var pcs [depth]uintptr
n := runtime.Callers(3, pcs[:])
var st stack = pcs[0:n]
return &st
}
// funcname removes the path prefix component of a function's name reported by func.Name().
func funcname(name string) string {
i := strings.LastIndex(name, "/")
name = name[i+1:]
i = strings.Index(name, ".")
return name[i+1:]
}
func trimGOPATH(name, file string) string {
// Here we want to get the source file path relative to the compile time
// GOPATH. As of Go 1.6.x there is no direct way to know the compiled
// GOPATH at runtime, but we can infer the number of path segments in the
// GOPATH. We note that fn.Name() returns the function name qualified by
// the import path, which does not include the GOPATH. Thus we can trim
// segments from the beginning of the file path until the number of path
// separators remaining is one more than the number of path separators in
// the function name. For example, given:
//
// GOPATH /home/user
// file /home/user/src/pkg/sub/file.go
// fn.Name() pkg/sub.Type.Method
//
// We want to produce:
//
// pkg/sub/file.go
//
// From this we can easily see that fn.Name() has one less path separator
// than our desired output. We count separators from the end of the file
// path until it finds two more than in the function name and then move
// one character forward to preserve the initial path segment without a
// leading separator.
const sep = "/"
goal := strings.Count(name, sep) + 2
i := len(file)
for n := 0; n < goal; n++ {
i = strings.LastIndex(file[:i], sep)
if i == -1 {
// not enough separators found, set i so that the slice expression
// below leaves file unmodified
i = -len(sep)
break
}
}
// get back to 0 or trim the leading separator
file = file[i+len(sep):]
return file
}

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// The MIT License (MIT)
//
// Copyright (c) 2013-2017 Oryx(ossrs)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
// +build go1.7
package logger
import (
"context"
"fmt"
"os"
)
func (v *loggerPlus) Println(ctx Context, a ...interface{}) {
args := v.contextFormat(ctx, a...)
v.doPrintln(args...)
}
func (v *loggerPlus) Printf(ctx Context, format string, a ...interface{}) {
format, args := v.contextFormatf(ctx, format, a...)
v.doPrintf(format, args...)
}
func (v *loggerPlus) contextFormat(ctx Context, a ...interface{}) []interface{} {
if ctx, ok := ctx.(context.Context); ok {
if cid, ok := ctx.Value(cidKey).(int); ok {
return append([]interface{}{fmt.Sprintf("[%v][%v]", os.Getpid(), cid)}, a...)
}
} else {
return v.format(ctx, a...)
}
return a
}
func (v *loggerPlus) contextFormatf(ctx Context, format string, a ...interface{}) (string, []interface{}) {
if ctx, ok := ctx.(context.Context); ok {
if cid, ok := ctx.Value(cidKey).(int); ok {
return "[%v][%v] " + format, append([]interface{}{os.Getpid(), cid}, a...)
}
} else {
return v.formatf(ctx, format, a...)
}
return format, a
}
// User should use context with value to pass the cid.
type key string
var cidKey key = "cid.logger.ossrs.org"
var gCid int = 999
// Create context with value.
func WithContext(ctx context.Context) context.Context {
gCid += 1
return context.WithValue(ctx, cidKey, gCid)
}
// Create context with value from parent, copy the cid from source context.
// @remark Create new cid if source has no cid represent.
func AliasContext(parent context.Context, source context.Context) context.Context {
if source != nil {
if cid, ok := source.Value(cidKey).(int); ok {
return context.WithValue(parent, cidKey, cid)
}
}
return WithContext(parent)
}

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// The MIT License (MIT)
//
// Copyright (c) 2013-2017 Oryx(ossrs)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
// The oryx logger package provides connection-oriented log service.
// logger.I(ctx, ...)
// logger.T(ctx, ...)
// logger.W(ctx, ...)
// logger.E(ctx, ...)
// Or use format:
// logger.If(ctx, format, ...)
// logger.Tf(ctx, format, ...)
// logger.Wf(ctx, format, ...)
// logger.Ef(ctx, format, ...)
// @remark the Context is optional thus can be nil.
// @remark From 1.7+, the ctx could be context.Context, wrap by logger.WithContext,
// please read ExampleLogger_ContextGO17().
package logger
import (
"fmt"
"io"
"io/ioutil"
"log"
"os"
)
// default level for logger.
const (
logInfoLabel = "[info] "
logTraceLabel = "[trace] "
logWarnLabel = "[warn] "
logErrorLabel = "[error] "
)
// The context for current goroutine.
// It maybe a cidContext or context.Context from GO1.7.
// @remark Use logger.WithContext(ctx) to wrap the context.
type Context interface{}
// The context to get current coroutine cid.
type cidContext interface {
Cid() int
}
// the LOG+ which provides connection-based log.
type loggerPlus struct {
logger *log.Logger
}
func NewLoggerPlus(l *log.Logger) Logger {
return &loggerPlus{logger: l}
}
func (v *loggerPlus) format(ctx Context, a ...interface{}) []interface{} {
if ctx == nil {
return append([]interface{}{fmt.Sprintf("[%v] ", os.Getpid())}, a...)
} else if ctx, ok := ctx.(cidContext); ok {
return append([]interface{}{fmt.Sprintf("[%v][%v] ", os.Getpid(), ctx.Cid())}, a...)
}
return a
}
func (v *loggerPlus) formatf(ctx Context, format string, a ...interface{}) (string, []interface{}) {
if ctx == nil {
return "[%v] " + format, append([]interface{}{os.Getpid()}, a...)
} else if ctx, ok := ctx.(cidContext); ok {
return "[%v][%v] " + format, append([]interface{}{os.Getpid(), ctx.Cid()}, a...)
}
return format, a
}
var colorYellow = "\033[33m"
var colorRed = "\033[31m"
var colorBlack = "\033[0m"
func (v *loggerPlus) doPrintln(args ...interface{}) {
if previousCloser == nil {
if v == Error {
fmt.Fprintf(os.Stdout, colorRed)
v.logger.Println(args...)
fmt.Fprintf(os.Stdout, colorBlack)
} else if v == Warn {
fmt.Fprintf(os.Stdout, colorYellow)
v.logger.Println(args...)
fmt.Fprintf(os.Stdout, colorBlack)
} else {
v.logger.Println(args...)
}
} else {
v.logger.Println(args...)
}
}
func (v *loggerPlus) doPrintf(format string, args ...interface{}) {
if previousCloser == nil {
if v == Error {
fmt.Fprintf(os.Stdout, colorRed)
v.logger.Printf(format, args...)
fmt.Fprintf(os.Stdout, colorBlack)
} else if v == Warn {
fmt.Fprintf(os.Stdout, colorYellow)
v.logger.Printf(format, args...)
fmt.Fprintf(os.Stdout, colorBlack)
} else {
v.logger.Printf(format, args...)
}
} else {
v.logger.Printf(format, args...)
}
}
// Info, the verbose info level, very detail log, the lowest level, to discard.
var Info Logger
// Alias for Info level println.
func I(ctx Context, a ...interface{}) {
Info.Println(ctx, a...)
}
// Printf for Info level log.
func If(ctx Context, format string, a ...interface{}) {
Info.Printf(ctx, format, a...)
}
// Trace, the trace level, something important, the default log level, to stdout.
var Trace Logger
// Alias for Trace level println.
func T(ctx Context, a ...interface{}) {
Trace.Println(ctx, a...)
}
// Printf for Trace level log.
func Tf(ctx Context, format string, a ...interface{}) {
Trace.Printf(ctx, format, a...)
}
// Warn, the warning level, dangerous information, to Stdout.
var Warn Logger
// Alias for Warn level println.
func W(ctx Context, a ...interface{}) {
Warn.Println(ctx, a...)
}
// Printf for Warn level log.
func Wf(ctx Context, format string, a ...interface{}) {
Warn.Printf(ctx, format, a...)
}
// Error, the error level, fatal error things, ot Stdout.
var Error Logger
// Alias for Error level println.
func E(ctx Context, a ...interface{}) {
Error.Println(ctx, a...)
}
// Printf for Error level log.
func Ef(ctx Context, format string, a ...interface{}) {
Error.Printf(ctx, format, a...)
}
// The logger for oryx.
type Logger interface {
// Println for logger plus,
// @param ctx the connection-oriented context,
// or context.Context from GO1.7, or nil to ignore.
Println(ctx Context, a ...interface{})
Printf(ctx Context, format string, a ...interface{})
}
func init() {
Info = NewLoggerPlus(log.New(ioutil.Discard, logInfoLabel, log.Ldate|log.Ltime|log.Lmicroseconds))
Trace = NewLoggerPlus(log.New(os.Stdout, logTraceLabel, log.Ldate|log.Ltime|log.Lmicroseconds))
Warn = NewLoggerPlus(log.New(os.Stderr, logWarnLabel, log.Ldate|log.Ltime|log.Lmicroseconds))
Error = NewLoggerPlus(log.New(os.Stderr, logErrorLabel, log.Ldate|log.Ltime|log.Lmicroseconds))
// init writer and closer.
previousWriter = os.Stdout
previousCloser = nil
}
// Switch the underlayer io.
// @remark user must close previous io for logger never close it.
func Switch(w io.Writer) io.Writer {
// TODO: support level, default to trace here.
Info = NewLoggerPlus(log.New(ioutil.Discard, logInfoLabel, log.Ldate|log.Ltime|log.Lmicroseconds))
Trace = NewLoggerPlus(log.New(w, logTraceLabel, log.Ldate|log.Ltime|log.Lmicroseconds))
Warn = NewLoggerPlus(log.New(w, logWarnLabel, log.Ldate|log.Ltime|log.Lmicroseconds))
Error = NewLoggerPlus(log.New(w, logErrorLabel, log.Ldate|log.Ltime|log.Lmicroseconds))
ow := previousWriter
previousWriter = w
if c, ok := w.(io.Closer); ok {
previousCloser = c
}
return ow
}
// The previous underlayer io for logger.
var previousCloser io.Closer
var previousWriter io.Writer
// The interface io.Closer
// Cleanup the logger, discard any log util switch to fresh writer.
func Close() (err error) {
Info = NewLoggerPlus(log.New(ioutil.Discard, logInfoLabel, log.Ldate|log.Ltime|log.Lmicroseconds))
Trace = NewLoggerPlus(log.New(ioutil.Discard, logTraceLabel, log.Ldate|log.Ltime|log.Lmicroseconds))
Warn = NewLoggerPlus(log.New(ioutil.Discard, logWarnLabel, log.Ldate|log.Ltime|log.Lmicroseconds))
Error = NewLoggerPlus(log.New(ioutil.Discard, logErrorLabel, log.Ldate|log.Ltime|log.Lmicroseconds))
if previousCloser != nil {
err = previousCloser.Close()
previousCloser = nil
}
return
}

34
trunk/3rdparty/srs-bench/vendor/github.com/ossrs/go-oryx-lib/logger/pre_go17.go generated vendored Normal file
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@ -0,0 +1,34 @@
// The MIT License (MIT)
//
// Copyright (c) 2013-2017 Oryx(ossrs)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
// +build !go1.7
package logger
func (v *loggerPlus) Println(ctx Context, a ...interface{}) {
args := v.format(ctx, a...)
v.doPrintln(args...)
}
func (v *loggerPlus) Printf(ctx Context, format string, a ...interface{}) {
format, args := v.formatf(ctx, format, a...)
v.doPrintf(format, args...)
}