ioKit

package
v2.1.0 Latest Latest
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Published: Jun 3, 2023 License: Apache-2.0 Imports: 13 Imported by: 0

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Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func CloseCloser added in v2.0.12

func CloseCloser(closers ...io.Closer) error

CloseCloser

PS: 就算循环过程中返回了非nil的error,也要继续向下循环(尽可能多地关闭).

@param closers (1) 可以为nil(即不传参);(2) 其中可以有nil @return 发生error的话,返回第一个

func CountLines

func CountLines(r io.Reader) (int, error)

CountLines 读取内容的行数

PS: (1) 如果最后一行只有'\n',会被视作1行; (2) 不要重复调用,否则第二次开始行数将不准确.

func CountLines1

func CountLines1(r io.Reader) (int, error)

CountLines1 读取内容的行数

PS: (1) 如果最后一行只有'\n',不会被视作1行; (2) 不要重复调用,否则第二次开始行数将不准确.

func MultiReader

func MultiReader(readers ...io.Reader) io.Reader

func MultiWriteCloser

func MultiWriteCloser(writeClosers ...io.WriteCloser) io.WriteCloser

MultiWriteCloser

PS: 参考了 io.MultiWriter().

func MultiWriter

func MultiWriter(writers ...io.Writer) io.Writer

func NewDailyRotateRuleWriteCloser deprecated

func NewDailyRotateRuleWriteCloser(filePath, delimiter string, days int, compress bool) (io.WriteCloser, error)

NewDailyRotateRuleWriteCloser 调用了go-zero中的方法.

Deprecated: 调用完 Write() 后立即调用 Close() || 进程退出,Write的内容可能不会立即保存到文件中,导致丢失.

@param filePath 会自动创建父级目录;

文件不存在: 会创建;
文件已存在: (1)是个文件,会append;(2)是个目录,会返回error(e.g. open /Users/richelieu/Downloads: is a directory)

func NewFileReader

func NewFileReader(filePath string) (*os.File, error)

NewFileReader

!!!:要在外部手动调用 *os.File 的Close方法.

@return os.File 结构体 实现了 io.Reader 接口

func NewLumberjackWriteCloser

func NewLumberjackWriteCloser(options ...LumberjackOption) (io.WriteCloser, error)

NewLumberjackWriteCloser

参考: https://github.com/natefinch/lumberjack

PS: (0) 传参可以参考下 NewLumberjackWriteCloser1 的注释. (1) 仅配置 filePath 的情况: (1)超过100MB就rotate一下; (2)保留所有文件; (3)不压缩; (4)默认使用UTC时间. (2) 文件不存在,会自动创建;文件存在,内容会追加在最后.

@param options 必须要配置: filePath

func NewLumberjackWriteCloser1 deprecated added in v2.0.12

func NewLumberjackWriteCloser1(filePath string, maxSize, maxBackups, maxAge int, localTime, compress bool) (io.WriteCloser, error)

NewLumberjackWriteCloser1

Deprecated: Use NewLumberjackWriteCloser instead. 唯一作用: 看如何传参.

PS: (1) lumberjack: 日志切割组件.一般情况下,lumberjack配合其他日志库,实现日志的滚动(rolling)记录. (2) 根据 maxBackups、maxAge 删除过期文件,根据 compress 决定是否压缩哪些未压缩的旧日志文件。

Golang 语言三方库 lumberjack 日志切割组件怎么使用?

https://mp.weixin.qq.com/s/gGnovwzS1ucW3Afxcytp_Q

go语言的日志滚动(rolling)记录器——lumberjack

https://zhuanlan.zhihu.com/p/430224518

@param filePath 日志路径,归档日志也会保存在对应目录下(若该值为空,则日志会保存到os.TempDir()目录下,日志文件名为<processname>-lumberjack.log)

(1) 会尝试创建父级目录;
(2) 文件不存在,会自动创建;
(3) 文件存在,
	(3.1) 是文件,内容追加在最后;
	(3.2) 是目录,返回error.

@param maxSize [单位: MB,默认: 100MB] 日志大小到达此值,就开始backup @param maxBackups 旧日志保存的最大数量,默认保存所有旧日志文件 @param maxAge [单位: days] 旧日志保存的最大天数,默认保存所有旧日志文件 @param localTime [默认使用UTC时间] 是否使用本地时间戳? @param compress [默认: false] 对backup的日志是否进行压缩?(压缩实际上是打成压缩包,文件名最后加上".gz")

e.g. rotate && compress == false

"aaa.log"(最新的日志文件;当前的指向)
"aaa-2023-05-10T08-51-01.320.log"
"aaa-2023-05-10T08-50-51.010.log"

e.g.1 rotate && compress == true

"aaa.log"(最新的日志文件;当前的指向)
"aaa-2023-05-10T08-55-08.504.log.gz"
"aaa-2023-05-10T08-54-57.786.log.gz"

func NewReadWriter

func NewReadWriter(s []byte) *bytes.Buffer

NewReadWriter

bytes.Buffer 结构体 实现了 io.ReadWriter 接口

func NewReadWriterFromString

func NewReadWriterFromString(str string) *bytes.Buffer

NewReadWriterFromString

bytes.Buffer 结构体 实现了 io.ReadWriter 接口

func NewReader

func NewReader(s []byte) io.Reader

func NewReaderFromString

func NewReaderFromString(str string) io.Reader

func NewSizeLimitRotateRuleWriteCloser deprecated

func NewSizeLimitRotateRuleWriteCloser(filePath, delimiter string, days, maxSize, maxBackups int, compress bool) (io.WriteCloser, error)

NewSizeLimitRotateRuleWriteCloser 调用了go-zero中的方法.

Deprecated: 调用完 Write() 后立即调用 Close() || 进程退出,Write的内容可能不会立即保存到文件中,导致丢失.

PS: 最多生成文件的数量: maxBackups + 1(filePath)

@param filePath 会自动创建父级目录;

文件不存在: 会创建;
文件已存在: (1)是个文件,会append;(2)是个目录,会返回error(e.g. open /Users/richelieu/Downloads: is a directory)

@param delimiter 分隔符 @param maxSize 单位: MB @param maxBackups 备份数量的上限 @param compress 如果设置为true,compress前后各会输出一条信息(logx.Infof、logx.Errorf)

e.g. Mac环境

("test.log", "-", 1, 10, 3, true)
4个文件:
	test.log
	test-2023-03-10T16/50/11+08/00.log.gz
	test-2023-03-10T16/50/10+08/00.log.gz
	test-2023-03-10T16/50/09+08/00.log.gz

func NopCloserToReadSeeker added in v2.0.12

func NopCloserToReadSeeker(readSeeker io.ReadSeeker) io.ReadSeekCloser

func NopCloserToReader added in v2.0.12

func NopCloserToReader(reader io.Reader) io.ReadCloser

NopCloserToReader

PS: 返回值调用Close()将什么都不会做,直接返回nil.

func NopCloserToWriter added in v2.0.12

func NopCloserToWriter(writer io.Writer) io.WriteCloser

NopCloserToWriter

PS: 返回值调用Close()将什么都不会做,直接返回nil.

func ReadFromReader

func ReadFromReader(reader io.Reader) ([]byte, error)

ReadFromReader 读取io.Reader的内容(io.Reader => []byte)

func ToBufioReader

func ToBufioReader(reader io.Reader) *bufio.Reader

ToBufioReader io.Reader 接口 => *bufio.Reader

作用: 可以调用 bufio.Reader 结构体的方法(因为 io.Reader 接口就一个Read方法).

func TryToClose added in v2.0.12

func TryToClose(objs ...any) error

TryToClose 尝试关闭(如果实现了io.Closer接口的话).

@param writers (1) 可以为nil(即不传参)

(2) 其中可以有nil

@return 发生error的话,返回第一个

Types

type LumberjackOption added in v2.0.12

type LumberjackOption func(opts *lumberjackOptions)

func WithCompress added in v2.0.12

func WithCompress(compress bool) LumberjackOption

func WithConsole added in v2.0.12

func WithConsole(console bool) LumberjackOption

func WithFilePath added in v2.0.12

func WithFilePath(filePath string) LumberjackOption

func WithLocalTime added in v2.0.12

func WithLocalTime(localTime bool) LumberjackOption

func WithMaxAge added in v2.0.12

func WithMaxAge(maxAge int) LumberjackOption

func WithMaxBackups added in v2.0.12

func WithMaxBackups(maxBackups int) LumberjackOption

func WithMaxSize added in v2.0.12

func WithMaxSize(maxSize int) LumberjackOption

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