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utils.go
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utils.go
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package ppp
import (
"crypto/md5"
"crypto/rsa"
"crypto/tls"
"crypto/x509"
"encoding/base64"
"encoding/json"
"encoding/pem"
"errors"
"fmt"
"golang.org/x/crypto/pkcs12"
"io"
"io/ioutil"
"math"
"net"
"net/http"
"net/url"
"reflect"
"sort"
"strconv"
"strings"
"time"
)
// LoadPrivateKeyFromFile 从文件中加载私钥
func LoadPrivateKeyFromFile(file string) (key *rsa.PrivateKey, err error) {
private, err := ioutil.ReadFile(file)
if err != nil {
return nil, err
}
key, err = x509.ParsePKCS1PrivateKey(base64Decode(string(private)))
return
}
// LoadPublicKeyFromFile 从文件中加载公钥
func LoadPublicKeyFromFile(file string) (key *rsa.PublicKey, err error) {
public, err := ioutil.ReadFile(file)
if err != nil {
return nil, err
}
block, _ := pem.Decode(public)
pub, err := x509.ParsePKIXPublicKey(block.Bytes)
if err != nil {
return nil, err
}
key, _ = pub.(*rsa.PublicKey)
return
}
// LoadCertFromP12 从p12中加载证书
func LoadCertFromP12(file, pwd string) (cert tls.Certificate, err error) {
b, err := ioutil.ReadFile(file)
if err != nil {
return cert, err
}
blocks, err := pkcs12.ToPEM(b, pwd)
if err != nil {
return cert, err
}
var pemData []byte
for _, b := range blocks {
pemData = append(pemData, pem.EncodeToMemory(b)...)
}
cert, err = tls.X509KeyPair(pemData, pemData)
return
}
/**
timeid
*/
type U struct {
prefix string
c chan int
d chan struct{}
}
func NewU(t int64, n int) *U {
u := &U{
prefix: time.Unix(t, 0).Format("060102150405"),
c: make(chan int, n),
d: make(chan struct{}),
}
u.start()
return u
}
func (u *U) start() {
go func() {
i := 0
for {
select {
case u.c <- i:
i++
case <-u.d:
return
}
}
}()
}
func (u *U) stop() {
u.d <- struct{}{}
close(u.c)
}
func (u *U) Next() string {
return u.prefix + fmt.Sprintf("%d", <-u.c)
}
type TimeID struct {
o *U
c *U
n *U
l int
}
func NewTimeID(l int) *TimeID {
return &TimeID{l: l}
}
func (u *TimeID) Start() error {
go func() {
t := time.NewTicker(time.Second)
u.n = NewU(time.Now().Unix(), u.l)
for {
u.o = u.c
u.c = u.n
u.n = NewU(time.Now().Unix()+1, u.l)
if u.o != nil {
u.o.stop()
}
<-t.C
}
}()
for u.c == nil {
time.Sleep(1 * time.Millisecond)
}
return nil
}
func (u *TimeID) Next() string {
return u.c.Next()
}
var _systemID *TimeID
func init() {
_systemID = NewTimeID(10)
_systemID.Start()
}
func randomTimeString() string {
return _systemID.Next()
}
/**
字符串md5
*/
func makeMd5(str string) string {
h := md5.New()
io.WriteString(h, str)
s := fmt.Sprintf("%x", h.Sum(nil))
return s
}
/**
生成随机字符串
*/
func randomString(lens int) string {
now := time.Now()
return makeMd5(strconv.FormatInt(now.UnixNano(), 10))[:lens]
}
/**
转化时间戳
*/
func str2Sec(layout, str string) int64 {
tm2, _ := time.ParseInLocation(layout, str, time.Local)
return tm2.Unix()
}
/**
时间戳格式化
*/
func sec2Str(layout string, sec int64) string {
t := time.Unix(sec, 0)
nt := t.Format(layout)
return nt
}
/**
获取当前时间戳
*/
func getNowSec() int64 {
return time.Now().Unix()
}
/**
压json
*/
func jsonEncode(ob interface{}) []byte {
if b, err := json.Marshal(ob); err == nil {
return b
}
return []byte("")
}
/**
解json
*/
func jsonDecode(data []byte, ob interface{}) error {
return json.Unmarshal(data, ob)
}
var base64Base = base64.NewEncoding("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/")
/**
压base64
*/
func base64Encode(data []byte) string {
return base64Base.EncodeToString(data)
}
/**
解base64
*/
func base64Decode(src string) []byte {
byt, err := base64Base.DecodeString(src)
if err != nil {
return []byte{}
}
return byt
}
/**
将struct转化为map,tag:json,xml
*/
func structToMap(obj interface{}, tag string) map[string]string {
t := reflect.TypeOf(obj)
v := reflect.ValueOf(obj)
m := map[string]string{}
for i := 0; i < t.NumField(); i++ {
fv := v.Field(i)
t := t.Field(i).Tag.Get(tag)
switch v.Field(i).Interface().(type) {
case string:
m[t] = fv.String()
case int, int64:
m[t] = strconv.FormatInt(fv.Int(), 10)
}
}
return m
}
/**
map排序
*/
type mapSorter []sortItem
type sortItem struct {
Key string `json:"key"`
Val interface{} `json:"val"`
}
func (ms mapSorter) Len() int {
return len(ms)
}
func (ms mapSorter) Less(i, j int) bool {
return ms[i].Key < ms[j].Key // 按键排序
}
func (ms mapSorter) Swap(i, j int) {
ms[i], ms[j] = ms[j], ms[i]
}
/**
map排序并根据排序结果kv拼接,empty:是否去除空值
*/
func mapSortAndJoin(m map[string]string, step1, step2 string, empty bool) string {
ms := make(mapSorter, 0, len(m))
for k, v := range m {
ms = append(ms, sortItem{k, v})
}
sort.Sort(ms)
s := []string{}
for _, p := range ms {
if p.Val.(string) != "" || !empty {
s = append(s, p.Key+step1+p.Val.(string))
}
}
return strings.Join(s, step2)
}
func parseFloat(s string) float64 {
f, _ := strconv.ParseFloat(s, 64)
return f
}
// float64 四舍五入取整
func round(x float64) int64 {
return int64(math.Round(x))
}
/**
Urlencode
*/
func httpBuildQuery(params map[string]string) string {
qs := url.Values{}
for k, v := range params {
qs.Add(k, v)
}
return qs.Encode()
}
/*
发送带有超时的Get请求
*/
func getRequest(url string) ([]byte, error) {
client := timeoutClient()
resp, err := client.Get(url)
if err != nil {
fmt.Println("GetRequest:", url, "Error:", err.Error())
return nil, err
}
defer resp.Body.Close()
respbody, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
return respbody, nil
}
/*
发送带有超时的Post请求
*/
func postRequest(url, contentType string, body io.Reader) ([]byte, error) {
client := timeoutClient()
resp, err := client.Post(url, contentType, body)
if err != nil {
return nil, err
}
defer resp.Body.Close()
respbody, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
return respbody, nil
}
/*
发送带有超时的Post https请求
*/
func postRequestTLS(url, contentType string, body io.Reader, tlsConfig *tls.Config) ([]byte, error) {
client := timeoutClientWithTLS(tlsConfig)
resp, err := client.Post(url, contentType, body)
if err != nil {
return nil, err
}
defer resp.Body.Close()
respbody, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
return respbody, nil
}
const (
maxTimeout int64 = 25
connectTimeout time.Duration = 3 * time.Second
readWriteTimeout time.Duration = 5 * time.Second
)
/**
网络请求链接定义
*/
func timeoutClient() *http.Client {
return &http.Client{
Transport: &http.Transport{
Dial: timeoutDialer(connectTimeout, readWriteTimeout),
MaxIdleConnsPerHost: 200,
DisableKeepAlives: true,
},
}
}
/**
网络请求链接定义
*/
func timeoutClientWithTLS(tlsConfig *tls.Config) *http.Client {
return &http.Client{
Transport: &http.Transport{
TLSClientConfig: tlsConfig,
Dial: timeoutDialer(connectTimeout, readWriteTimeout),
MaxIdleConnsPerHost: 200,
DisableKeepAlives: true,
},
}
}
func timeoutDialer(cTimeout time.Duration,
rwTimeout time.Duration) func(net, addr string) (c net.Conn, err error) {
return func(netw, addr string) (net.Conn, error) {
conn, err := net.DialTimeout(netw, addr, cTimeout)
if err != nil {
return nil, err
}
conn.SetDeadline(time.Now().Add(rwTimeout))
return conn, nil
}
}
func newError(msg string) error {
return errors.New(msg)
}
func newErrorByE(e Error) error {
if e.Code == Succ {
return nil
}
return newError(e.Msg)
}