helpers

README

HuperWebs

helpers

This module contains several helper-functions that should make building web applications with Golang easier.

GetExtension

GetExtension parses the given string, by taking everything before the optional question-mark (?), then taking everything after the last dot. If there is no extension in the filename, this function will return the entire filename (without parameters).

ExtractFilePath

ExtractFilePath extracts the path (directory), name (without extension) and extension. The parameters (after '?') are stripped entirely.

GetStringArray

GetStringArray allows easy parsing of context string-array values.

Documentation

Index

• func ExtractFilePath(url string) (string, string, string)
• func Filter(str string, search string) string
• func FormInteger(r *http.Request, name string) int
• func GetExtension(filename *string) string
• func GetStringArray(r *http.Request, name string) []string
• func LastURLParameter(r *http.Request) string
• func MaxParallelism() int
• func RemoveFromStringArray(arr *[]string, elem string)
• func RemoveFromStringArrayIndex(arr *[]string, elem int)
• func ToFriendly(s string) string
• type CacheObject
  • func NewCacheObject(exp time.Duration, f func() interface{}) CacheObject
  • func (o *CacheObject) Val() interface{}
• type CacheStorage
  • func NewCacheStorage(cacheDir string) *CacheStorage
  • func (c *CacheStorage) Add(urlPath, requestUrl string)
  • func (c *CacheStorage) Delete(urlPath string)
  • func (c *CacheStorage) Exists(urlPath, requestUrl string) bool

Functions

func ExtractFilePath

func ExtractFilePath(url string) (string, string, string)

ExtractFilePath goes from "https://aa.bb/abc/def.ghi?jkl=mnp&qrs=tuv" to ("abc/", "def", "ghi")

func Filter

func Filter(str string, search string) string

func FormInteger

func FormInteger(r *http.Request, name string) int

func GetExtension

func GetExtension(filename *string) string

GetExtension goes from "https://aa.bb/abc/def.ghi?jkl=mnp&qrs=tuv" to "ghi"

func GetStringArray

func GetStringArray(r *http.Request, name string) []string

GetStringArray tries to retrieve the context.Get(r, name) value as an []string

func LastURLParameter

func LastURLParameter(r *http.Request) string

LastURLParameter treats everything after the last slash (up until the question mark) as parameter-value

func MaxParallelism

func MaxParallelism() int

MaxParallelism runs the maximum number of goroutines that should be created

func RemoveFromStringArray

func RemoveFromStringArray(arr *[]string, elem string)

func RemoveFromStringArrayIndex

func RemoveFromStringArrayIndex(arr *[]string, elem int)

func ToFriendly

func ToFriendly(s string) string

ToFriendly converts a string to a HTML-friendly version. Replaces &, /, and space. Trims dashes and slashes.

Types

type CacheObject

type CacheObject struct {
	// Expires is the expiration-interval after which the object should be fetched again
	Expires time.Duration

	// Fetch is the function that retrieves the value from the source
	Fetch func() interface{}
	// contains filtered or unexported fields
}

func NewCacheObject

func NewCacheObject(exp time.Duration, f func() interface{}) CacheObject

func (*CacheObject) Val

func (o *CacheObject) Val() interface{}

Val fetches the actual value from source using the Fetch function - only when needed.

type CacheStorage

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

func NewCacheStorage

func NewCacheStorage(cacheDir string) *CacheStorage

func (*CacheStorage) Add

func (c *CacheStorage) Add(urlPath, requestUrl string)

func (*CacheStorage) Delete

func (c *CacheStorage) Delete(urlPath string)

func (*CacheStorage) Exists

func (c *CacheStorage) Exists(urlPath, requestUrl string) bool