/
helper.go
87 lines (67 loc) · 1.46 KB
/
helper.go
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package framework
import (
"encoding/json"
"fmt"
"github.com/disintegration/imaging"
"image"
"math/rand"
"net/http"
"time"
)
var HttpClient *http.Client
func init() {
HttpClient = &http.Client{Timeout: 60 * time.Second}
}
// RandomString returns random string at fixed length
func RandomString(n int) string {
var letter = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
buf := make([]rune, n)
for i := range buf {
buf[i] = letter[rand.Intn(len(letter))]
}
return string(buf)
}
func ParseDate(year, month, day int) string {
t, _ := time.Parse("2006-01-02",
fmt.Sprintf("%d-%02d-%02d", year, month, day))
return t.UTC().Format("January 2, 2006")
}
// LoadImage from url
func LoadImage(url string) (image.Image, error) {
// Get the data
resp, err := HttpClient.Get(url)
if err != nil {
return nil, err
}
webImage, err := imaging.Decode(resp.Body)
defer resp.Body.Close()
if err != nil {
return nil, err
}
return webImage, nil
}
// UrlToStruct loads url json to struct target
func UrlToStruct(url string, target interface{}) error {
resp, err := HttpClient.Get(url)
if err != nil {
return err
}
err = json.NewDecoder(resp.Body).Decode(target)
errClose := resp.Body.Close()
if errClose != nil {
return errClose
}
if err != nil {
return err
}
return nil
}
// Index returns index of str in arr
func Index(arr []string, str string) int {
for i, v := range arr {
if v == str {
return i
}
}
return -1
}