package util
|
|
import (
|
"bytes"
|
"encoding/json"
|
"image"
|
"io/ioutil"
|
"net/http"
|
"strconv"
|
"webserver/extend/code"
|
|
"basic.com/pubsub/protomsg.git"
|
"github.com/gin-gonic/gin"
|
"github.com/golang/glog"
|
"github.com/pierrec/lz4"
|
"gocv.io/x/gocv"
|
|
"crypto/rand"
|
"fmt"
|
"reflect"
|
"strings"
|
)
|
|
// iterater field of struct to lowcast.
|
// return type: string slice.
|
func FiledbyStuct(stuct interface{}) []string {
|
var strtmp []string
|
t := reflect.TypeOf(stuct)
|
for i := 0; i < t.NumField(); i++ {
|
strtmp = append(strtmp, strings.ToLower(string(t.Field(i).Name)))
|
}
|
return strtmp
|
}
|
|
//
|
// ResponseFormat 返回数据格式化
|
func ResponseFormat(c *gin.Context, respStatus *code.Code, data interface{}) {
|
if respStatus == nil {
|
glog.Error("response status param not found!")
|
respStatus = code.RequestParamError
|
}
|
c.JSON(respStatus.Status, gin.H{
|
"code": respStatus.Status,
|
"success": respStatus.Success,
|
"msg": respStatus.Message,
|
"data": data,
|
})
|
return
|
}
|
|
func PseudoUuid() (uuid string) {
|
b := make([]byte, 16)
|
rand.Read(b)
|
uuid = fmt.Sprintf("%X-%X-%X-%X-%X", b[0:4], b[4:6], b[6:8], b[8:10], b[10:])
|
|
return
|
}
|
|
//struct转map
|
func Struct2Map(obj interface{}) map[string]interface{} {
|
resultMap := make(map[string]interface{}, 0)
|
bytesData, err := json.Marshal(obj)
|
if err != nil {
|
return resultMap
|
}
|
json.Unmarshal(bytesData, &resultMap)
|
return resultMap
|
|
//
|
//t := reflect.TypeOf(obj)
|
//v := reflect.ValueOf(obj)
|
//
|
//var data = make(map[string]interface{})
|
//for i := 0; i < t.NumField(); i++ {
|
// data[t.Field(i).Name] = v.Field(i).Interface()
|
//}
|
//return data
|
}
|
|
func ReadImgData(url string) ([]byte, error) {
|
resp, err := http.Get(url)
|
if err != nil {
|
return nil, err
|
}
|
defer resp.Body.Close()
|
pix, err := ioutil.ReadAll(resp.Body)
|
if err != nil {
|
return nil, err
|
}
|
return pix, nil
|
}
|
|
// 按尺寸去切图
|
func SubImg(i protomsg.Image, x0, y0, x1, y1 int) []byte {
|
img, _ := gocv.NewMatFromBytes(int(i.Height), int(i.Width), gocv.MatTypeCV8UC3, i.Data)
|
rect := image.Rect(EnlargeSize(x0, y0, x1, y1, i))
|
region := img.Region(rect)
|
bytes, _ := gocv.IMEncode(".jpg", region)
|
return bytes
|
}
|
|
// 长宽变为一比一，每边各扩百分之20
|
func EnlargeSize(x0, y0, x1, y1 int, i protomsg.Image) (x0_new, y0_new, x1_new, y1_new int) {
|
// 先把长宽变为一比一
|
chazhi := (y1 - y0) - (x1 - x0)
|
x0 = x0 - chazhi/2
|
if x0 < 0 {
|
x0 = 0
|
}
|
x1 = x1 + chazhi/2
|
if x1 > int(i.Width) {
|
x1 = int(i.Width)
|
}
|
|
// 再把每边各扩大百分之20
|
enlarge := float32(0.2)
|
x0_new = int((1+enlarge)*float32(x0) - enlarge*float32(x1))
|
if x0_new < 0 {
|
x0_new = 0
|
}
|
x1_new = int((1+enlarge)*float32(x1) - enlarge*float32(x0))
|
if x1_new > int(i.Width) {
|
x1_new = int(i.Width)
|
}
|
y0_new = int((1+enlarge)*float32(y0) - enlarge*float32(y1))
|
if y0_new < 0 {
|
y0_new = 0
|
}
|
y1_new = int((1+enlarge)*float32(y1) - enlarge*float32(y0))
|
if y1_new > int(i.Height) {
|
y1_new = int(i.Height)
|
}
|
return
|
}
|
|
func StringIpToInt(ipstring string) int {
|
ipSegs := strings.Split(ipstring, ".")
|
var ipInt int = 0
|
var pos uint = 24
|
for _, ipSeg := range ipSegs {
|
tempInt, _ := strconv.Atoi(ipSeg)
|
tempInt = tempInt << pos
|
ipInt = ipInt | tempInt
|
pos -= 8
|
}
|
return ipInt
|
}
|
|
func IpIntToString(ipInt int) string {
|
ipSegs := make([]string, 4)
|
var len int = len(ipSegs)
|
buffer := bytes.NewBufferString("")
|
for i := 0; i < len; i++ {
|
tempInt := ipInt & 0xFF
|
ipSegs[len-i-1] = strconv.Itoa(tempInt)
|
|
ipInt = ipInt >> 8
|
}
|
for i := 0; i < len; i++ {
|
buffer.WriteString(ipSegs[i])
|
if i < len-1 {
|
buffer.WriteString(".")
|
}
|
}
|
return buffer.String()
|
}
|
|
func ParseScore(compareScore float32) float32 {
|
if compareScore < 1 {
|
compareScore = compareScore * 100
|
}
|
f, _ := strconv.ParseFloat(fmt.Sprintf("%2.2f", compareScore), 32)
|
return float32(f)
|
}
|
|
func ParseScore64(compareScore float64) float64 {
|
if compareScore < 1 {
|
compareScore = compareScore * 100
|
}
|
f, _ := strconv.ParseFloat(fmt.Sprintf("%2.2f", compareScore), 64)
|
return f
|
}
|
|
// UnCompress uncompress
|
func UnCompress(in []byte) ([]byte, error) {
|
out := make([]byte, 10*len(in))
|
n, err := lz4.UncompressBlock(in, out)
|
if err != nil {
|
fmt.Println(err)
|
return nil, err
|
}
|
out = out[:n] // uncompressed data
|
return out, nil
|
}
|
|
// Compress compress
|
func Compress(in []byte) ([]byte, error) {
|
out := make([]byte, len(in))
|
ht := make([]int, 64<<10) // buffer for the compression table
|
n, err := lz4.CompressBlock(in, out, ht)
|
if err != nil {
|
fmt.Println(err)
|
return nil, err
|
}
|
if n >= len(in) {
|
fmt.Println("image is not compressible")
|
}
|
out = out[:n] // compressed data
|
return out, nil
|
}
|
