forgejo/modules/base/tool.go
Peter Smit 7759b9ee6e Remove the "PHP" style formatting function
The "PHP" formatting function doesn't add anything, except an undocumented date format.

All usages in the templates have been replaced with DateFmtShort and DateFmtLong for convenience.
2015-02-16 14:44:27 +02:00

423 lines
9.5 KiB
Go

// Copyright 2014 The Gogs Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package base
import (
"crypto/hmac"
"crypto/md5"
"crypto/rand"
"crypto/sha1"
"encoding/base64"
"encoding/hex"
"fmt"
"hash"
"html/template"
"math"
"strings"
"time"
"github.com/Unknwon/com"
"github.com/Unknwon/i18n"
"github.com/microcosm-cc/bluemonday"
"github.com/gogits/gogs/modules/avatar"
"github.com/gogits/gogs/modules/setting"
)
var Sanitizer = bluemonday.UGCPolicy()
// Encode string to md5 hex value.
func EncodeMd5(str string) string {
m := md5.New()
m.Write([]byte(str))
return hex.EncodeToString(m.Sum(nil))
}
// Encode string to sha1 hex value.
func EncodeSha1(str string) string {
h := sha1.New()
h.Write([]byte(str))
return hex.EncodeToString(h.Sum(nil))
}
func BasicAuthDecode(encoded string) (string, string, error) {
s, err := base64.StdEncoding.DecodeString(encoded)
if err != nil {
return "", "", err
}
auth := strings.SplitN(string(s), ":", 2)
return auth[0], auth[1], nil
}
func BasicAuthEncode(username, password string) string {
return base64.StdEncoding.EncodeToString([]byte(username + ":" + password))
}
// GetRandomString generate random string by specify chars.
func GetRandomString(n int, alphabets ...byte) string {
const alphanum = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
var bytes = make([]byte, n)
rand.Read(bytes)
for i, b := range bytes {
if len(alphabets) == 0 {
bytes[i] = alphanum[b%byte(len(alphanum))]
} else {
bytes[i] = alphabets[b%byte(len(alphabets))]
}
}
return string(bytes)
}
// http://code.google.com/p/go/source/browse/pbkdf2/pbkdf2.go?repo=crypto
func PBKDF2(password, salt []byte, iter, keyLen int, h func() hash.Hash) []byte {
prf := hmac.New(h, password)
hashLen := prf.Size()
numBlocks := (keyLen + hashLen - 1) / hashLen
var buf [4]byte
dk := make([]byte, 0, numBlocks*hashLen)
U := make([]byte, hashLen)
for block := 1; block <= numBlocks; block++ {
// N.B.: || means concatenation, ^ means XOR
// for each block T_i = U_1 ^ U_2 ^ ... ^ U_iter
// U_1 = PRF(password, salt || uint(i))
prf.Reset()
prf.Write(salt)
buf[0] = byte(block >> 24)
buf[1] = byte(block >> 16)
buf[2] = byte(block >> 8)
buf[3] = byte(block)
prf.Write(buf[:4])
dk = prf.Sum(dk)
T := dk[len(dk)-hashLen:]
copy(U, T)
// U_n = PRF(password, U_(n-1))
for n := 2; n <= iter; n++ {
prf.Reset()
prf.Write(U)
U = U[:0]
U = prf.Sum(U)
for x := range U {
T[x] ^= U[x]
}
}
}
return dk[:keyLen]
}
// verify time limit code
func VerifyTimeLimitCode(data string, minutes int, code string) bool {
if len(code) <= 18 {
return false
}
// split code
start := code[:12]
lives := code[12:18]
if d, err := com.StrTo(lives).Int(); err == nil {
minutes = d
}
// right active code
retCode := CreateTimeLimitCode(data, minutes, start)
if retCode == code && minutes > 0 {
// check time is expired or not
before, _ := time.ParseInLocation("200601021504", start, time.Local)
now := time.Now()
if before.Add(time.Minute*time.Duration(minutes)).Unix() > now.Unix() {
return true
}
}
return false
}
const TimeLimitCodeLength = 12 + 6 + 40
// create a time limit code
// code format: 12 length date time string + 6 minutes string + 40 sha1 encoded string
func CreateTimeLimitCode(data string, minutes int, startInf interface{}) string {
format := "200601021504"
var start, end time.Time
var startStr, endStr string
if startInf == nil {
// Use now time create code
start = time.Now()
startStr = start.Format(format)
} else {
// use start string create code
startStr = startInf.(string)
start, _ = time.ParseInLocation(format, startStr, time.Local)
startStr = start.Format(format)
}
end = start.Add(time.Minute * time.Duration(minutes))
endStr = end.Format(format)
// create sha1 encode string
sh := sha1.New()
sh.Write([]byte(data + setting.SecretKey + startStr + endStr + com.ToStr(minutes)))
encoded := hex.EncodeToString(sh.Sum(nil))
code := fmt.Sprintf("%s%06d%s", startStr, minutes, encoded)
return code
}
// AvatarLink returns avatar link by given e-mail.
func AvatarLink(email string) string {
if setting.DisableGravatar {
return setting.AppSubUrl + "/img/avatar_default.jpg"
}
gravatarHash := avatar.HashEmail(email)
if setting.Service.EnableCacheAvatar {
return setting.AppSubUrl + "/avatar/" + gravatarHash
}
return setting.GravatarSource + gravatarHash
}
// Seconds-based time units
const (
Minute = 60
Hour = 60 * Minute
Day = 24 * Hour
Week = 7 * Day
Month = 30 * Day
Year = 12 * Month
)
func computeTimeDiff(diff int64) (int64, string) {
diffStr := ""
switch {
case diff <= 0:
diff = 0
diffStr = "now"
case diff < 2:
diff = 0
diffStr = "1 second"
case diff < 1*Minute:
diffStr = fmt.Sprintf("%d seconds", diff)
diff = 0
case diff < 2*Minute:
diff -= 1 * Minute
diffStr = "1 minute"
case diff < 1*Hour:
diffStr = fmt.Sprintf("%d minutes", diff/Minute)
diff -= diff / Minute * Minute
case diff < 2*Hour:
diff -= 1 * Hour
diffStr = "1 hour"
case diff < 1*Day:
diffStr = fmt.Sprintf("%d hours", diff/Hour)
diff -= diff / Hour * Hour
case diff < 2*Day:
diff -= 1 * Day
diffStr = "1 day"
case diff < 1*Week:
diffStr = fmt.Sprintf("%d days", diff/Day)
diff -= diff / Day * Day
case diff < 2*Week:
diff -= 1 * Week
diffStr = "1 week"
case diff < 1*Month:
diffStr = fmt.Sprintf("%d weeks", diff/Week)
diff -= diff / Week * Week
case diff < 2*Month:
diff -= 1 * Month
diffStr = "1 month"
case diff < 1*Year:
diffStr = fmt.Sprintf("%d months", diff/Month)
diff -= diff / Month * Month
case diff < 2*Year:
diff -= 1 * Year
diffStr = "1 year"
default:
diffStr = fmt.Sprintf("%d years", diff/Year)
diff = 0
}
return diff, diffStr
}
// TimeSincePro calculates the time interval and generate full user-friendly string.
func TimeSincePro(then time.Time) string {
now := time.Now()
diff := now.Unix() - then.Unix()
if then.After(now) {
return "future"
}
var timeStr, diffStr string
for {
if diff == 0 {
break
}
diff, diffStr = computeTimeDiff(diff)
timeStr += ", " + diffStr
}
return strings.TrimPrefix(timeStr, ", ")
}
func timeSince(then time.Time, lang string) string {
now := time.Now()
lbl := i18n.Tr(lang, "tool.ago")
diff := now.Unix() - then.Unix()
if then.After(now) {
lbl = i18n.Tr(lang, "tool.from_now")
diff = then.Unix() - now.Unix()
}
switch {
case diff <= 0:
return i18n.Tr(lang, "tool.now")
case diff <= 2:
return i18n.Tr(lang, "tool.1s", lbl)
case diff < 1*Minute:
return i18n.Tr(lang, "tool.seconds", diff, lbl)
case diff < 2*Minute:
return i18n.Tr(lang, "tool.1m", lbl)
case diff < 1*Hour:
return i18n.Tr(lang, "tool.minutes", diff/Minute, lbl)
case diff < 2*Hour:
return i18n.Tr(lang, "tool.1h", lbl)
case diff < 1*Day:
return i18n.Tr(lang, "tool.hours", diff/Hour, lbl)
case diff < 2*Day:
return i18n.Tr(lang, "tool.1d", lbl)
case diff < 1*Week:
return i18n.Tr(lang, "tool.days", diff/Day, lbl)
case diff < 2*Week:
return i18n.Tr(lang, "tool.1w", lbl)
case diff < 1*Month:
return i18n.Tr(lang, "tool.weeks", diff/Week, lbl)
case diff < 2*Month:
return i18n.Tr(lang, "tool.1mon", lbl)
case diff < 1*Year:
return i18n.Tr(lang, "tool.months", diff/Month, lbl)
case diff < 2*Year:
return i18n.Tr(lang, "tool.1y", lbl)
default:
return i18n.Tr(lang, "tool.years", diff/Year, lbl)
}
}
// TimeSince calculates the time interval and generate user-friendly string.
func TimeSince(t time.Time, lang string) template.HTML {
return template.HTML(fmt.Sprintf(`<span class="time-since" title="%s">%s</span>`, t.Format(setting.TimeFormat), timeSince(t, lang)))
}
const (
Byte = 1
KByte = Byte * 1024
MByte = KByte * 1024
GByte = MByte * 1024
TByte = GByte * 1024
PByte = TByte * 1024
EByte = PByte * 1024
)
var bytesSizeTable = map[string]uint64{
"b": Byte,
"kb": KByte,
"mb": MByte,
"gb": GByte,
"tb": TByte,
"pb": PByte,
"eb": EByte,
}
func logn(n, b float64) float64 {
return math.Log(n) / math.Log(b)
}
func humanateBytes(s uint64, base float64, sizes []string) string {
if s < 10 {
return fmt.Sprintf("%dB", s)
}
e := math.Floor(logn(float64(s), base))
suffix := sizes[int(e)]
val := float64(s) / math.Pow(base, math.Floor(e))
f := "%.0f"
if val < 10 {
f = "%.1f"
}
return fmt.Sprintf(f+"%s", val, suffix)
}
// FileSize calculates the file size and generate user-friendly string.
func FileSize(s int64) string {
sizes := []string{"B", "KB", "MB", "GB", "TB", "PB", "EB"}
return humanateBytes(uint64(s), 1024, sizes)
}
// Subtract deals with subtraction of all types of number.
func Subtract(left interface{}, right interface{}) interface{} {
var rleft, rright int64
var fleft, fright float64
var isInt bool = true
switch left.(type) {
case int:
rleft = int64(left.(int))
case int8:
rleft = int64(left.(int8))
case int16:
rleft = int64(left.(int16))
case int32:
rleft = int64(left.(int32))
case int64:
rleft = left.(int64)
case float32:
fleft = float64(left.(float32))
isInt = false
case float64:
fleft = left.(float64)
isInt = false
}
switch right.(type) {
case int:
rright = int64(right.(int))
case int8:
rright = int64(right.(int8))
case int16:
rright = int64(right.(int16))
case int32:
rright = int64(right.(int32))
case int64:
rright = right.(int64)
case float32:
fright = float64(left.(float32))
isInt = false
case float64:
fleft = left.(float64)
isInt = false
}
if isInt {
return rleft - rright
} else {
return fleft + float64(rleft) - (fright + float64(rright))
}
}