mirror of
https://github.com/go-gitea/gitea.git
synced 2024-12-15 05:42:47 +08:00
7759b9ee6e
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.
423 lines
9.5 KiB
Go
423 lines
9.5 KiB
Go
// Copyright 2014 The Gogs Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package base
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import (
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"crypto/hmac"
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"crypto/md5"
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"crypto/rand"
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"crypto/sha1"
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"encoding/base64"
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"encoding/hex"
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"fmt"
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"hash"
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"html/template"
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"math"
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"strings"
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"time"
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"github.com/Unknwon/com"
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"github.com/Unknwon/i18n"
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"github.com/microcosm-cc/bluemonday"
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"github.com/gogits/gogs/modules/avatar"
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"github.com/gogits/gogs/modules/setting"
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)
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var Sanitizer = bluemonday.UGCPolicy()
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// Encode string to md5 hex value.
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func EncodeMd5(str string) string {
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m := md5.New()
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m.Write([]byte(str))
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return hex.EncodeToString(m.Sum(nil))
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}
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// Encode string to sha1 hex value.
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func EncodeSha1(str string) string {
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h := sha1.New()
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h.Write([]byte(str))
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return hex.EncodeToString(h.Sum(nil))
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}
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func BasicAuthDecode(encoded string) (string, string, error) {
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s, err := base64.StdEncoding.DecodeString(encoded)
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if err != nil {
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return "", "", err
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}
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auth := strings.SplitN(string(s), ":", 2)
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return auth[0], auth[1], nil
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}
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func BasicAuthEncode(username, password string) string {
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return base64.StdEncoding.EncodeToString([]byte(username + ":" + password))
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}
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// GetRandomString generate random string by specify chars.
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func GetRandomString(n int, alphabets ...byte) string {
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const alphanum = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
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var bytes = make([]byte, n)
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rand.Read(bytes)
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for i, b := range bytes {
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if len(alphabets) == 0 {
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bytes[i] = alphanum[b%byte(len(alphanum))]
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} else {
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bytes[i] = alphabets[b%byte(len(alphabets))]
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}
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}
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return string(bytes)
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}
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// http://code.google.com/p/go/source/browse/pbkdf2/pbkdf2.go?repo=crypto
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func PBKDF2(password, salt []byte, iter, keyLen int, h func() hash.Hash) []byte {
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prf := hmac.New(h, password)
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hashLen := prf.Size()
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numBlocks := (keyLen + hashLen - 1) / hashLen
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var buf [4]byte
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dk := make([]byte, 0, numBlocks*hashLen)
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U := make([]byte, hashLen)
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for block := 1; block <= numBlocks; block++ {
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// N.B.: || means concatenation, ^ means XOR
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// for each block T_i = U_1 ^ U_2 ^ ... ^ U_iter
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// U_1 = PRF(password, salt || uint(i))
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prf.Reset()
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prf.Write(salt)
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buf[0] = byte(block >> 24)
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buf[1] = byte(block >> 16)
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buf[2] = byte(block >> 8)
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buf[3] = byte(block)
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prf.Write(buf[:4])
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dk = prf.Sum(dk)
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T := dk[len(dk)-hashLen:]
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copy(U, T)
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// U_n = PRF(password, U_(n-1))
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for n := 2; n <= iter; n++ {
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prf.Reset()
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prf.Write(U)
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U = U[:0]
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U = prf.Sum(U)
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for x := range U {
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T[x] ^= U[x]
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}
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}
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}
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return dk[:keyLen]
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}
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// verify time limit code
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func VerifyTimeLimitCode(data string, minutes int, code string) bool {
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if len(code) <= 18 {
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return false
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}
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// split code
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start := code[:12]
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lives := code[12:18]
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if d, err := com.StrTo(lives).Int(); err == nil {
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minutes = d
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}
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// right active code
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retCode := CreateTimeLimitCode(data, minutes, start)
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if retCode == code && minutes > 0 {
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// check time is expired or not
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before, _ := time.ParseInLocation("200601021504", start, time.Local)
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now := time.Now()
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if before.Add(time.Minute*time.Duration(minutes)).Unix() > now.Unix() {
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return true
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}
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}
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return false
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}
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const TimeLimitCodeLength = 12 + 6 + 40
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// create a time limit code
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// code format: 12 length date time string + 6 minutes string + 40 sha1 encoded string
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func CreateTimeLimitCode(data string, minutes int, startInf interface{}) string {
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format := "200601021504"
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var start, end time.Time
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var startStr, endStr string
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if startInf == nil {
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// Use now time create code
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start = time.Now()
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startStr = start.Format(format)
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} else {
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// use start string create code
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startStr = startInf.(string)
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start, _ = time.ParseInLocation(format, startStr, time.Local)
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startStr = start.Format(format)
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}
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end = start.Add(time.Minute * time.Duration(minutes))
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endStr = end.Format(format)
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// create sha1 encode string
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sh := sha1.New()
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sh.Write([]byte(data + setting.SecretKey + startStr + endStr + com.ToStr(minutes)))
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encoded := hex.EncodeToString(sh.Sum(nil))
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code := fmt.Sprintf("%s%06d%s", startStr, minutes, encoded)
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return code
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}
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// AvatarLink returns avatar link by given e-mail.
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func AvatarLink(email string) string {
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if setting.DisableGravatar {
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return setting.AppSubUrl + "/img/avatar_default.jpg"
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}
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gravatarHash := avatar.HashEmail(email)
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if setting.Service.EnableCacheAvatar {
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return setting.AppSubUrl + "/avatar/" + gravatarHash
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}
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return setting.GravatarSource + gravatarHash
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}
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// Seconds-based time units
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const (
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Minute = 60
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Hour = 60 * Minute
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Day = 24 * Hour
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Week = 7 * Day
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Month = 30 * Day
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Year = 12 * Month
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)
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func computeTimeDiff(diff int64) (int64, string) {
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diffStr := ""
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switch {
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case diff <= 0:
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diff = 0
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diffStr = "now"
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case diff < 2:
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diff = 0
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diffStr = "1 second"
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case diff < 1*Minute:
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diffStr = fmt.Sprintf("%d seconds", diff)
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diff = 0
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case diff < 2*Minute:
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diff -= 1 * Minute
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diffStr = "1 minute"
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case diff < 1*Hour:
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diffStr = fmt.Sprintf("%d minutes", diff/Minute)
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diff -= diff / Minute * Minute
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case diff < 2*Hour:
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diff -= 1 * Hour
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diffStr = "1 hour"
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case diff < 1*Day:
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diffStr = fmt.Sprintf("%d hours", diff/Hour)
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diff -= diff / Hour * Hour
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case diff < 2*Day:
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diff -= 1 * Day
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diffStr = "1 day"
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case diff < 1*Week:
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diffStr = fmt.Sprintf("%d days", diff/Day)
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diff -= diff / Day * Day
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case diff < 2*Week:
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diff -= 1 * Week
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diffStr = "1 week"
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case diff < 1*Month:
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diffStr = fmt.Sprintf("%d weeks", diff/Week)
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diff -= diff / Week * Week
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case diff < 2*Month:
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diff -= 1 * Month
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diffStr = "1 month"
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case diff < 1*Year:
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diffStr = fmt.Sprintf("%d months", diff/Month)
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diff -= diff / Month * Month
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case diff < 2*Year:
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diff -= 1 * Year
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diffStr = "1 year"
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default:
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diffStr = fmt.Sprintf("%d years", diff/Year)
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diff = 0
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}
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return diff, diffStr
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}
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// TimeSincePro calculates the time interval and generate full user-friendly string.
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func TimeSincePro(then time.Time) string {
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now := time.Now()
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diff := now.Unix() - then.Unix()
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if then.After(now) {
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return "future"
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}
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var timeStr, diffStr string
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for {
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if diff == 0 {
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break
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}
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diff, diffStr = computeTimeDiff(diff)
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timeStr += ", " + diffStr
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}
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return strings.TrimPrefix(timeStr, ", ")
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}
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func timeSince(then time.Time, lang string) string {
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now := time.Now()
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lbl := i18n.Tr(lang, "tool.ago")
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diff := now.Unix() - then.Unix()
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if then.After(now) {
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lbl = i18n.Tr(lang, "tool.from_now")
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diff = then.Unix() - now.Unix()
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}
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switch {
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case diff <= 0:
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return i18n.Tr(lang, "tool.now")
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case diff <= 2:
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return i18n.Tr(lang, "tool.1s", lbl)
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case diff < 1*Minute:
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return i18n.Tr(lang, "tool.seconds", diff, lbl)
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case diff < 2*Minute:
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return i18n.Tr(lang, "tool.1m", lbl)
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case diff < 1*Hour:
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return i18n.Tr(lang, "tool.minutes", diff/Minute, lbl)
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case diff < 2*Hour:
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return i18n.Tr(lang, "tool.1h", lbl)
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case diff < 1*Day:
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return i18n.Tr(lang, "tool.hours", diff/Hour, lbl)
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case diff < 2*Day:
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return i18n.Tr(lang, "tool.1d", lbl)
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case diff < 1*Week:
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return i18n.Tr(lang, "tool.days", diff/Day, lbl)
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case diff < 2*Week:
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return i18n.Tr(lang, "tool.1w", lbl)
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case diff < 1*Month:
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return i18n.Tr(lang, "tool.weeks", diff/Week, lbl)
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case diff < 2*Month:
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return i18n.Tr(lang, "tool.1mon", lbl)
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case diff < 1*Year:
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return i18n.Tr(lang, "tool.months", diff/Month, lbl)
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case diff < 2*Year:
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return i18n.Tr(lang, "tool.1y", lbl)
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default:
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return i18n.Tr(lang, "tool.years", diff/Year, lbl)
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}
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}
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// TimeSince calculates the time interval and generate user-friendly string.
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func TimeSince(t time.Time, lang string) template.HTML {
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return template.HTML(fmt.Sprintf(`<span class="time-since" title="%s">%s</span>`, t.Format(setting.TimeFormat), timeSince(t, lang)))
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}
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const (
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Byte = 1
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KByte = Byte * 1024
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MByte = KByte * 1024
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GByte = MByte * 1024
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TByte = GByte * 1024
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PByte = TByte * 1024
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EByte = PByte * 1024
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)
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var bytesSizeTable = map[string]uint64{
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"b": Byte,
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"kb": KByte,
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"mb": MByte,
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"gb": GByte,
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"tb": TByte,
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"pb": PByte,
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"eb": EByte,
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}
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func logn(n, b float64) float64 {
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return math.Log(n) / math.Log(b)
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}
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func humanateBytes(s uint64, base float64, sizes []string) string {
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if s < 10 {
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return fmt.Sprintf("%dB", s)
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}
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e := math.Floor(logn(float64(s), base))
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suffix := sizes[int(e)]
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val := float64(s) / math.Pow(base, math.Floor(e))
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f := "%.0f"
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if val < 10 {
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f = "%.1f"
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}
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return fmt.Sprintf(f+"%s", val, suffix)
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}
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// FileSize calculates the file size and generate user-friendly string.
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func FileSize(s int64) string {
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sizes := []string{"B", "KB", "MB", "GB", "TB", "PB", "EB"}
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return humanateBytes(uint64(s), 1024, sizes)
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}
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// Subtract deals with subtraction of all types of number.
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func Subtract(left interface{}, right interface{}) interface{} {
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var rleft, rright int64
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var fleft, fright float64
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var isInt bool = true
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switch left.(type) {
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case int:
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rleft = int64(left.(int))
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case int8:
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rleft = int64(left.(int8))
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case int16:
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rleft = int64(left.(int16))
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case int32:
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rleft = int64(left.(int32))
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case int64:
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rleft = left.(int64)
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case float32:
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fleft = float64(left.(float32))
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isInt = false
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case float64:
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fleft = left.(float64)
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isInt = false
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}
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switch right.(type) {
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case int:
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rright = int64(right.(int))
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case int8:
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rright = int64(right.(int8))
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case int16:
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rright = int64(right.(int16))
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case int32:
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rright = int64(right.(int32))
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case int64:
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rright = right.(int64)
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case float32:
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fright = float64(left.(float32))
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isInt = false
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case float64:
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fleft = left.(float64)
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isInt = false
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}
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if isInt {
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return rleft - rright
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} else {
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return fleft + float64(rleft) - (fright + float64(rright))
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}
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}
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