util

Documentation

Index

• Constants
• Variables
• func FormatFloat(val float64, prec int) string
• func MustParseFloat(s string) float64
• func NewValidLimiter(r rate.Limit, b int) (*rate.Limiter, error)
• func NotZero(v float64) bool
• func ParseFloat(s string) (float64, error)
• func Pow10(n int64) int64
• func Render(tpl string, args interface{}) string
• func Retry(ctx context.Context, attempts int, duration time.Duration, ...) (err error)
• func ShouldDelay(l *rate.Limiter, minInterval time.Duration) time.Duration
• func StringSliceContains(slice []string, needle string) bool
• func Zero(v float64) bool
• type Response
  • func NewResponse(r *http.Response) (response *Response, err error)
  • func (r *Response) DecodeJSON(o interface{}) error
  • func (r *Response) IsError() bool
  • func (r *Response) IsHTML() bool
  • func (r *Response) IsJSON() bool
  • func (r *Response) String() string
• type RetryPredicator
• type VolatileMemory
  • func NewDetectorCache() *VolatileMemory
  • func (i *VolatileMemory) IsObjectFresh(obj interface{}, ttl time.Duration) bool
  • func (i *VolatileMemory) IsTextFresh(text string, ttl time.Duration) bool

Constants

const (
	InfiniteRetry = 0
)

const MaxDigits = 18 // MAX_INT64 ~ 9 * 10^18

Variables

var Pow10Table = [MaxDigits + 1]int64{
	1, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9, 1e10, 1e11, 1e12, 1e13, 1e14, 1e15, 1e16, 1e17, 1e18,
}

Functions

func FormatFloat

func FormatFloat(val float64, prec int) string

func MustParseFloat

func MustParseFloat(s string) float64

func NewValidLimiter

func NewValidLimiter(r rate.Limit, b int) (*rate.Limiter, error)

func NotZero

func NotZero(v float64) bool

func ParseFloat

func ParseFloat(s string) (float64, error)

func Pow10

func Pow10(n int64) int64

func Render

func Render(tpl string, args interface{}) string

func Retry

func Retry(ctx context.Context, attempts int, duration time.Duration, fnToRetry func() error, errHandler func(error), predicators ...RetryPredicator) (err error)

Retry retrys the passed function for "attempts" times, if passed function return error. Setting attempts to zero means keep retrying.

func ShouldDelay

func ShouldDelay(l *rate.Limiter, minInterval time.Duration) time.Duration

func StringSliceContains

func StringSliceContains(slice []string, needle string) bool

func Zero

func Zero(v float64) bool

Types

type Response

type Response struct {
	*http.Response

	// Body overrides the composited Body field.
	Body []byte
}

Response is wrapper for standard http.Response and provides more methods.

func NewResponse

func NewResponse(r *http.Response) (response *Response, err error)

newResponse is a wrapper of the http.Response instance, it reads the response body and close the file.

func (*Response) DecodeJSON

func (r *Response) DecodeJSON(o interface{}) error

func (*Response) IsError

func (r *Response) IsError() bool

func (*Response) IsHTML

func (r *Response) IsHTML() bool

func (*Response) IsJSON

func (r *Response) IsJSON() bool

func (*Response) String

func (r *Response) String() string

String converts response body to string. An empty string will be returned if error.

type RetryPredicator

type RetryPredicator func(e error) bool

type VolatileMemory

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

func NewDetectorCache

func NewDetectorCache() *VolatileMemory

func (*VolatileMemory) IsObjectFresh

func (i *VolatileMemory) IsObjectFresh(obj interface{}, ttl time.Duration) bool

func (*VolatileMemory) IsTextFresh

func (i *VolatileMemory) IsTextFresh(text string, ttl time.Duration) bool