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476 lines
12 KiB
476 lines
12 KiB
// 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/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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r "math/rand" |
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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/gogits/gogs/modules/setting" |
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) |
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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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// 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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// RandomCreateBytes generate random []byte by specify chars. |
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func RandomCreateBytes(n int, alphabets ...byte) []byte { |
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const alphanum = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" |
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var bytes = make([]byte, n) |
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var randby bool |
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if num, err := rand.Read(bytes); num != n || err != nil { |
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r.Seed(time.Now().UnixNano()) |
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randby = true |
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} |
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for i, b := range bytes { |
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if len(alphabets) == 0 { |
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if randby { |
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bytes[i] = alphanum[r.Intn(len(alphanum))] |
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} else { |
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bytes[i] = alphanum[b%byte(len(alphanum))] |
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} |
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} else { |
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if randby { |
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bytes[i] = alphabets[r.Intn(len(alphabets))] |
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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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} |
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return 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, _ := DateParse(start, "YmdHi") |
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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 := "YmdHi" |
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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 = DateFormat(start, 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, _ = DateParse(startStr, format) |
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startStr = DateFormat(start, format) |
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} |
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end = start.Add(time.Minute * time.Duration(minutes)) |
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endStr = DateFormat(end, 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 "/img/avatar_default.jpg" |
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} else if setting.Service.EnableCacheAvatar { |
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return "/avatar/" + EncodeMd5(email) |
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} |
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return "//1.gravatar.com/avatar/" + EncodeMd5(email) |
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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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// DateFormat pattern rules. |
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var datePatterns = []string{ |
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// year |
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"Y", "2006", // A full numeric representation of a year, 4 digits Examples: 1999 or 2003 |
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"y", "06", //A two digit representation of a year Examples: 99 or 03 |
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// month |
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"m", "01", // Numeric representation of a month, with leading zeros 01 through 12 |
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"n", "1", // Numeric representation of a month, without leading zeros 1 through 12 |
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"M", "Jan", // A short textual representation of a month, three letters Jan through Dec |
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"F", "January", // A full textual representation of a month, such as January or March January through December |
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// day |
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"d", "02", // Day of the month, 2 digits with leading zeros 01 to 31 |
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"j", "2", // Day of the month without leading zeros 1 to 31 |
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// week |
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"D", "Mon", // A textual representation of a day, three letters Mon through Sun |
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"l", "Monday", // A full textual representation of the day of the week Sunday through Saturday |
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// time |
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"g", "3", // 12-hour format of an hour without leading zeros 1 through 12 |
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"G", "15", // 24-hour format of an hour without leading zeros 0 through 23 |
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"h", "03", // 12-hour format of an hour with leading zeros 01 through 12 |
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"H", "15", // 24-hour format of an hour with leading zeros 00 through 23 |
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"a", "pm", // Lowercase Ante meridiem and Post meridiem am or pm |
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"A", "PM", // Uppercase Ante meridiem and Post meridiem AM or PM |
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"i", "04", // Minutes with leading zeros 00 to 59 |
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"s", "05", // Seconds, with leading zeros 00 through 59 |
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// time zone |
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"T", "MST", |
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"P", "-07:00", |
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"O", "-0700", |
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// RFC 2822 |
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"r", time.RFC1123Z, |
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} |
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// Parse Date use PHP time format. |
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func DateParse(dateString, format string) (time.Time, error) { |
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replacer := strings.NewReplacer(datePatterns...) |
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format = replacer.Replace(format) |
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return time.ParseInLocation(format, dateString, time.Local) |
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} |
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// Date takes a PHP like date func to Go's time format. |
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func DateFormat(t time.Time, format string) string { |
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replacer := strings.NewReplacer(datePatterns...) |
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format = replacer.Replace(format) |
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return t.Format(format) |
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}
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