util

package
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Published: Aug 21, 2022 License: Apache-2.0 Imports: 19 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

View Source
var SecretCache = make(map[string][]byte)

Functions

func FileExists

func FileExists(path string) bool

FileExists 判断所给路径文件/文件夹是否存在

func GenRsaKey

func GenRsaKey(savePath string)

GenRsaKey 生成RSA公钥私钥

func GetPrvRsaKey

func GetPrvRsaKey(path string) []byte

func GetPubRsaKey

func GetPubRsaKey(path string) []byte

func RandBytes

func RandBytes(n int) []byte

func RandString

func RandString(n int) string

func RsaDecrypt

func RsaDecrypt(ciphertext, keyBytes []byte) []byte

RsaDecrypt 私钥解密

func RsaEncrypt

func RsaEncrypt(data, keyBytes []byte) []byte

RsaEncrypt 公钥加密

func RsaSignWithSha256

func RsaSignWithSha256(data []byte, keyBytes []byte) []byte

RsaSignWithSha256 签名+加密

func RsaVerySignWithSha256

func RsaVerySignWithSha256(data, signData, keyBytes []byte) bool

RsaVerySignWithSha256 验证

Types

type Scheduler

type Scheduler interface {
	// Next returns the next execution time after the given (previous) time.
	// It will return a zero time if no next time is scheduled.
	//
	// All times must be UTC.
	Next(time.Time) time.Time
}

Scheduler determines the execution plan of a task.

type SecretKeyType

type SecretKeyType uint8
const (
	SecretKeyPrv SecretKeyType = iota //private secret
	SecretKeyPub
)

type Timer

type Timer struct {
	// contains filtered or unexported fields
}

Timer represents a single event. When the Timer expires, the given task will be executed.

func (*Timer) Stop

func (t *Timer) Stop() bool

Stop prevents the Timer from firing. It returns true if the call stops the timer, false if the timer has already expired or been stopped.

If the timer t has already expired and the t.task has been started in its own goroutine; Stop does not wait for t.task to complete before returning. If the caller needs to know whether t.task is completed, it must coordinate with t.task explicitly.

type TimingWheel

type TimingWheel struct {
	// contains filtered or unexported fields
}

TimingWheel is an implementation of Hierarchical Timing Wheels.

func NewTimingWheel

func NewTimingWheel(tick time.Duration, wheelSize int64) *TimingWheel

NewTimingWheel creates an instance of TimingWheel with the given tick and wheelSize.

func (*TimingWheel) AfterFunc

func (tw *TimingWheel) AfterFunc(d time.Duration, f func()) *Timer

AfterFunc waits for the duration to elapse and then calls f in its own goroutine. It returns a Timer that can be used to cancel the call using its Stop method.

func (*TimingWheel) ScheduleFunc

func (tw *TimingWheel) ScheduleFunc(s Scheduler, f func()) (t *Timer)

ScheduleFunc calls f (in its own goroutine) according to the execution plan scheduled by s. It returns a Timer that can be used to cancel the call using its Stop method.

If the caller want to terminate the execution plan halfway, it must stop the timer and ensure that the timer is stopped actually, since in the current implementation, there is a gap between the expiring and the restarting of the timer. The wait time for ensuring is short since the gap is very small.

Internally, ScheduleFunc will ask the first execution time (by calling s.Next()) initially, and create a timer if the execution time is non-zero. Afterwards, it will ask the next execution time each time f is about to be executed, and f will be called at the next execution time if the time is non-zero.

func (*TimingWheel) Start

func (tw *TimingWheel) Start()

Start starts the current timing wheel.

func (*TimingWheel) Stop

func (tw *TimingWheel) Stop()

Stop stops the current timing wheel.

If there is any timer's task being running in its own goroutine, Stop does not wait for the task to complete before returning. If the caller needs to know whether the task is completed, it must coordinate with the task explicitly.

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