package util
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import (
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"basic.com/pubsub/protomsg.git"
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"bytes"
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"encoding/json"
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"errors"
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"github.com/gin-gonic/gin"
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"github.com/golang/glog"
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"github.com/pierrec/lz4"
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"gocv.io/x/gocv"
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"image"
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"io/ioutil"
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"net"
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"net/http"
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"os/exec"
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"strconv"
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"webserver/extend/code"
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"crypto/rand"
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"fmt"
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"reflect"
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"strings"
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)
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// iterater field of struct to lowcast.
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// return type: string slice.
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func FiledbyStuct(stuct interface{}) []string {
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var strtmp []string
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t := reflect.TypeOf(stuct)
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for i := 0; i < t.NumField(); i++ {
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strtmp = append(strtmp, strings.ToLower(string(t.Field(i).Name)))
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}
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return strtmp
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}
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//
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// ResponseFormat 返回数据格式化
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func ResponseFormat(c *gin.Context, respStatus *code.Code, data interface{}) {
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if respStatus == nil {
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glog.Error("response status param not found!")
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respStatus = code.RequestParamError
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}
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c.JSON(respStatus.Status, gin.H{
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"code": respStatus.Status,
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"success": respStatus.Success,
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"msg": respStatus.Message,
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"data": data,
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})
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return
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}
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func PseudoUuid() (uuid string) {
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b := make([]byte, 16)
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rand.Read(b)
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uuid = fmt.Sprintf("%X-%X-%X-%X-%X", b[0:4], b[4:6], b[6:8], b[8:10], b[10:])
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return
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}
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//struct转map
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func Struct2Map(obj interface{}) map[string]interface{} {
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resultMap :=make(map[string]interface{},0)
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bytesData, err := json.Marshal(obj)
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if err !=nil {
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return resultMap
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}
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json.Unmarshal(bytesData, &resultMap)
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return resultMap
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//
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//t := reflect.TypeOf(obj)
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//v := reflect.ValueOf(obj)
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//
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//var data = make(map[string]interface{})
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//for i := 0; i < t.NumField(); i++ {
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// data[t.Field(i).Name] = v.Field(i).Interface()
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//}
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//return data
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}
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func ReadImgData(url string) ([]byte,error) {
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resp,err := http.Get(url)
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if err !=nil {
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return nil,err
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}
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defer resp.Body.Close()
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pix,err := ioutil.ReadAll(resp.Body)
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if err !=nil {
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return nil,err
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}
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return pix,nil
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}
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// 按尺寸去切图
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func SubImg(i protomsg.Image, x0, y0, x1, y1 int, ) []byte {
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img, _ := gocv.NewMatFromBytes(int(i.Height), int(i.Width), gocv.MatTypeCV8UC3, i.Data)
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rect := image.Rect(EnlargeSize(x0, y0, x1, y1, i))
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region := img.Region(rect)
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bytes, _ := gocv.IMEncode(".jpg", region)
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return bytes
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}
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// 长宽变为一比一，每边各扩百分之20
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func EnlargeSize(x0, y0, x1, y1 int, i protomsg.Image) (x0_new, y0_new, x1_new, y1_new int) {
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// 先把长宽变为一比一
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chazhi := (y1 - y0) - (x1 - x0)
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x0 = x0 - chazhi/2
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if x0 < 0 {
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x0 = 0
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}
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x1 = x1 + chazhi/2
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if x1 > int(i.Width) {
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x1 = int(i.Width)
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}
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// 再把每边各扩大百分之20
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enlarge := float32(0.2)
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x0_new = int((1+enlarge)*float32(x0) - enlarge*float32(x1))
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if x0_new < 0 {
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x0_new = 0
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}
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x1_new = int((1+enlarge)*float32(x1) - enlarge*float32(x0))
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if x1_new > int(i.Width) {
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x1_new = int(i.Width)
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}
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y0_new = int((1+enlarge)*float32(y0) - enlarge*float32(y1))
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if y0_new < 0 {
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y0_new = 0
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}
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y1_new = int((1+enlarge)*float32(y1) - enlarge*float32(y0))
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if y1_new > int(i.Height) {
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y1_new = int(i.Height)
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}
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return
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}
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// 获取本机网卡IP
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func GetLocalIP(networkName string) (ipv4 string,mask string, err error) {
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interfaces, err := net.Interfaces()
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if err != nil {
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return "","", err
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}
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for _, i := range interfaces {
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byName, err := net.InterfaceByName(i.Name)
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if err != nil {
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return "","", err
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}
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addresses, err := byName.Addrs()
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for _, v := range addresses {
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if ipnet, ok:=v.(*net.IPNet);ok && !ipnet.IP.IsLoopback(){
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if ipnet.IP.To4() !=nil{
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if byName.Name == networkName{
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maskStr := ipnet.Mask.String()
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mask64, _ := strconv.ParseUint(maskStr, 16, 32)
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return ipnet.IP.String(),IpIntToString(int(mask64)),nil
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}
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}
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}
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}
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}
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return "","", errors.New("ipv4 not found")
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}
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func GetDefaultRoute(networkName string)(route string,err error){
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cmdStr := fmt.Sprintf("route | grep -P \"^default.*%s$\" | awk '{print $2}'",networkName)
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cmd := exec.Command("/bin/sh","-c",cmdStr)
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b, err := cmd.Output()
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if err!=nil{
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return "",err
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}
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return string(b),nil
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}
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func StringIpToInt(ipstring string) int {
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ipSegs := strings.Split(ipstring, ".")
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var ipInt int = 0
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var pos uint = 24
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for _, ipSeg := range ipSegs {
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tempInt, _ := strconv.Atoi(ipSeg)
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tempInt = tempInt << pos
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ipInt = ipInt | tempInt
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pos -= 8
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}
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return ipInt
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}
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func IpIntToString(ipInt int) string{
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ipSegs := make([]string, 4)
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var len int = len(ipSegs)
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buffer := bytes.NewBufferString("")
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for i := 0; i < len; i++ {
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tempInt := ipInt & 0xFF
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ipSegs[len-i-1] = strconv.Itoa(tempInt)
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ipInt = ipInt >> 8
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}
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for i := 0; i < len; i++ {
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buffer.WriteString(ipSegs[i])
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if i < len-1 {
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buffer.WriteString(".")
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}
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}
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return buffer.String()
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}
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func ParseScore(compareScore float32) float32 {
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if compareScore < 1 {
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compareScore = compareScore * 100
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}
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f, _ := strconv.ParseFloat(fmt.Sprintf("%2.2f", compareScore), 32)
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return float32(f)
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}
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// UnCompress uncompress
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func UnCompress(in []byte) ([]byte, error) {
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out := make([]byte, 10*len(in))
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n, err := lz4.UncompressBlock(in, out)
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if err != nil {
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fmt.Println(err)
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return nil, err
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}
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out = out[:n] // uncompressed data
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return out, nil
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}
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// Compress compress
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func Compress(in []byte) ([]byte, error) {
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out := make([]byte, len(in))
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ht := make([]int, 64<<10) // buffer for the compression table
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n, err := lz4.CompressBlock(in, out, ht)
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if err != nil {
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fmt.Println(err)
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return nil, err
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}
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if n >= len(in) {
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fmt.Println("image is not compressible")
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}
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out = out[:n] // compressed data
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return out, nil
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}
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