112 lines
2.4 KiB
Go
112 lines
2.4 KiB
Go
package utils
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import (
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"crypto/md5"
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"crypto/rand"
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"encoding/hex"
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"fmt"
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"hash"
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rand2 "math/rand"
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"net/url"
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"reflect"
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"sort"
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"strconv"
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"strings"
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"time"
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)
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type UUID [16]byte
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const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
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func GetUUID() (uuidHex string) {
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uuid := NewUUID()
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uuidHex = hex.EncodeToString(uuid[:])
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return
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}
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func NewUUID() UUID {
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ns := UUID{}
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safeRandom(ns[:])
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u := newFromHash(md5.New(), ns, RandStringBytes(16))
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u[6] = (u[6] & 0x0f) | (byte(2) << 4)
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u[8] = (u[8]&(0xff>>2) | (0x02 << 6))
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return u
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}
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func RandStringBytes(n int) string {
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b := make([]byte, n)
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for i := range b {
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b[i] = letterBytes[rand2.Intn(len(letterBytes))]
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}
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return string(b)
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}
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func newFromHash(h hash.Hash, ns UUID, name string) UUID {
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u := UUID{}
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h.Write(ns[:])
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h.Write([]byte(name))
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copy(u[:], h.Sum(nil))
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return u
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}
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func safeRandom(dest []byte) {
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if _, err := rand.Read(dest); err != nil {
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panic(err)
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}
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}
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func GetUrlFormedMap(source map[string]string) (urlEncoded string) {
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urlEncoder := url.Values{}
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for key, value := range source {
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urlEncoder.Add(key, value)
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}
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urlEncoded = urlEncoder.Encode()
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return
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}
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func GetUrlByKeySort(source map[string]string) (url string) {
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keys := make([]string, 0, len(source))
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for k := range source {
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keys = append(keys, k)
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}
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sort.Strings(keys)
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for _, key := range keys {
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url += fmt.Sprintf("%s=%s&", key, source[key])
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}
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return strings.TrimRight(url, "&")
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}
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func InitStructWithDefaultTag(bean interface{}) {
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beantype := reflect.TypeOf(bean)
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for i := 0; i < beantype.Elem().NumField(); i++ {
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field := beantype.Elem().Field(i)
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defaultValue := strings.TrimSpace(field.Tag.Get("default"))
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if defaultValue == "" || defaultValue == "-" {
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continue
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}
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setter := reflect.ValueOf(bean).Elem().Field(i)
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fieldTypeName := field.Type.String()
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switch fieldTypeName {
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case "int", "int64", "int32", "int8", "int16":
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intval, _ := strconv.ParseInt(defaultValue, 10, 64)
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setter.SetInt(intval)
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case "uint", "uint8", "uint16", "uint32", "uint64", "uintptr":
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uintval, _ := strconv.ParseUint(defaultValue, 10, 64)
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setter.SetUint(uintval)
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case "string":
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setter.SetString(defaultValue)
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case "time.Duration":
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intval, _ := strconv.ParseInt(defaultValue, 10, 64)
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setter.SetInt(intval * int64(time.Second))
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case "bool":
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boolval, _ := strconv.ParseBool(defaultValue)
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setter.SetBool(boolval)
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default:
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fmt.Println(field.Type.String(), field.Name)
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}
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}
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}
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