tool.go 12 KB

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  1. // Copyright 2014 The Gogs Authors. All rights reserved.
  2. // Use of this source code is governed by a MIT-style
  3. // license that can be found in the LICENSE file.
  4. package base
  5. import (
  6. "crypto/hmac"
  7. "crypto/md5"
  8. "crypto/rand"
  9. "crypto/sha1"
  10. "encoding/hex"
  11. "fmt"
  12. "hash"
  13. "html/template"
  14. "math"
  15. r "math/rand"
  16. "strings"
  17. "time"
  18. "github.com/Unknwon/com"
  19. "github.com/Unknwon/i18n"
  20. "github.com/gogits/gogs/modules/setting"
  21. )
  22. // Encode string to md5 hex value
  23. func EncodeMd5(str string) string {
  24. m := md5.New()
  25. m.Write([]byte(str))
  26. return hex.EncodeToString(m.Sum(nil))
  27. }
  28. // GetRandomString generate random string by specify chars.
  29. func GetRandomString(n int, alphabets ...byte) string {
  30. const alphanum = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
  31. var bytes = make([]byte, n)
  32. rand.Read(bytes)
  33. for i, b := range bytes {
  34. if len(alphabets) == 0 {
  35. bytes[i] = alphanum[b%byte(len(alphanum))]
  36. } else {
  37. bytes[i] = alphabets[b%byte(len(alphabets))]
  38. }
  39. }
  40. return string(bytes)
  41. }
  42. // RandomCreateBytes generate random []byte by specify chars.
  43. func RandomCreateBytes(n int, alphabets ...byte) []byte {
  44. const alphanum = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
  45. var bytes = make([]byte, n)
  46. var randby bool
  47. if num, err := rand.Read(bytes); num != n || err != nil {
  48. r.Seed(time.Now().UnixNano())
  49. randby = true
  50. }
  51. for i, b := range bytes {
  52. if len(alphabets) == 0 {
  53. if randby {
  54. bytes[i] = alphanum[r.Intn(len(alphanum))]
  55. } else {
  56. bytes[i] = alphanum[b%byte(len(alphanum))]
  57. }
  58. } else {
  59. if randby {
  60. bytes[i] = alphabets[r.Intn(len(alphabets))]
  61. } else {
  62. bytes[i] = alphabets[b%byte(len(alphabets))]
  63. }
  64. }
  65. }
  66. return bytes
  67. }
  68. // http://code.google.com/p/go/source/browse/pbkdf2/pbkdf2.go?repo=crypto
  69. func PBKDF2(password, salt []byte, iter, keyLen int, h func() hash.Hash) []byte {
  70. prf := hmac.New(h, password)
  71. hashLen := prf.Size()
  72. numBlocks := (keyLen + hashLen - 1) / hashLen
  73. var buf [4]byte
  74. dk := make([]byte, 0, numBlocks*hashLen)
  75. U := make([]byte, hashLen)
  76. for block := 1; block <= numBlocks; block++ {
  77. // N.B.: || means concatenation, ^ means XOR
  78. // for each block T_i = U_1 ^ U_2 ^ ... ^ U_iter
  79. // U_1 = PRF(password, salt || uint(i))
  80. prf.Reset()
  81. prf.Write(salt)
  82. buf[0] = byte(block >> 24)
  83. buf[1] = byte(block >> 16)
  84. buf[2] = byte(block >> 8)
  85. buf[3] = byte(block)
  86. prf.Write(buf[:4])
  87. dk = prf.Sum(dk)
  88. T := dk[len(dk)-hashLen:]
  89. copy(U, T)
  90. // U_n = PRF(password, U_(n-1))
  91. for n := 2; n <= iter; n++ {
  92. prf.Reset()
  93. prf.Write(U)
  94. U = U[:0]
  95. U = prf.Sum(U)
  96. for x := range U {
  97. T[x] ^= U[x]
  98. }
  99. }
  100. }
  101. return dk[:keyLen]
  102. }
  103. // verify time limit code
  104. func VerifyTimeLimitCode(data string, minutes int, code string) bool {
  105. if len(code) <= 18 {
  106. return false
  107. }
  108. // split code
  109. start := code[:12]
  110. lives := code[12:18]
  111. if d, err := com.StrTo(lives).Int(); err == nil {
  112. minutes = d
  113. }
  114. // right active code
  115. retCode := CreateTimeLimitCode(data, minutes, start)
  116. if retCode == code && minutes > 0 {
  117. // check time is expired or not
  118. before, _ := DateParse(start, "YmdHi")
  119. now := time.Now()
  120. if before.Add(time.Minute*time.Duration(minutes)).Unix() > now.Unix() {
  121. return true
  122. }
  123. }
  124. return false
  125. }
  126. const TimeLimitCodeLength = 12 + 6 + 40
  127. // create a time limit code
  128. // code format: 12 length date time string + 6 minutes string + 40 sha1 encoded string
  129. func CreateTimeLimitCode(data string, minutes int, startInf interface{}) string {
  130. format := "YmdHi"
  131. var start, end time.Time
  132. var startStr, endStr string
  133. if startInf == nil {
  134. // Use now time create code
  135. start = time.Now()
  136. startStr = DateFormat(start, format)
  137. } else {
  138. // use start string create code
  139. startStr = startInf.(string)
  140. start, _ = DateParse(startStr, format)
  141. startStr = DateFormat(start, format)
  142. }
  143. end = start.Add(time.Minute * time.Duration(minutes))
  144. endStr = DateFormat(end, format)
  145. // create sha1 encode string
  146. sh := sha1.New()
  147. sh.Write([]byte(data + setting.SecretKey + startStr + endStr + com.ToStr(minutes)))
  148. encoded := hex.EncodeToString(sh.Sum(nil))
  149. code := fmt.Sprintf("%s%06d%s", startStr, minutes, encoded)
  150. return code
  151. }
  152. // AvatarLink returns avatar link by given e-mail.
  153. func AvatarLink(email string) string {
  154. if setting.DisableGravatar {
  155. return "/img/avatar_default.jpg"
  156. } else if setting.Service.EnableCacheAvatar {
  157. return "/avatar/" + EncodeMd5(email)
  158. }
  159. return "//1.gravatar.com/avatar/" + EncodeMd5(email)
  160. }
  161. // Seconds-based time units
  162. const (
  163. Minute = 60
  164. Hour = 60 * Minute
  165. Day = 24 * Hour
  166. Week = 7 * Day
  167. Month = 30 * Day
  168. Year = 12 * Month
  169. )
  170. func computeTimeDiff(diff int64) (int64, string) {
  171. diffStr := ""
  172. switch {
  173. case diff <= 0:
  174. diff = 0
  175. diffStr = "now"
  176. case diff < 2:
  177. diff = 0
  178. diffStr = "1 second"
  179. case diff < 1*Minute:
  180. diffStr = fmt.Sprintf("%d seconds", diff)
  181. diff = 0
  182. case diff < 2*Minute:
  183. diff -= 1 * Minute
  184. diffStr = "1 minute"
  185. case diff < 1*Hour:
  186. diffStr = fmt.Sprintf("%d minutes", diff/Minute)
  187. diff -= diff / Minute * Minute
  188. case diff < 2*Hour:
  189. diff -= 1 * Hour
  190. diffStr = "1 hour"
  191. case diff < 1*Day:
  192. diffStr = fmt.Sprintf("%d hours", diff/Hour)
  193. diff -= diff / Hour * Hour
  194. case diff < 2*Day:
  195. diff -= 1 * Day
  196. diffStr = "1 day"
  197. case diff < 1*Week:
  198. diffStr = fmt.Sprintf("%d days", diff/Day)
  199. diff -= diff / Day * Day
  200. case diff < 2*Week:
  201. diff -= 1 * Week
  202. diffStr = "1 week"
  203. case diff < 1*Month:
  204. diffStr = fmt.Sprintf("%d weeks", diff/Week)
  205. diff -= diff / Week * Week
  206. case diff < 2*Month:
  207. diff -= 1 * Month
  208. diffStr = "1 month"
  209. case diff < 1*Year:
  210. diffStr = fmt.Sprintf("%d months", diff/Month)
  211. diff -= diff / Month * Month
  212. case diff < 2*Year:
  213. diff -= 1 * Year
  214. diffStr = "1 year"
  215. default:
  216. diffStr = fmt.Sprintf("%d years", diff/Year)
  217. diff = 0
  218. }
  219. return diff, diffStr
  220. }
  221. // TimeSincePro calculates the time interval and generate full user-friendly string.
  222. func TimeSincePro(then time.Time) string {
  223. now := time.Now()
  224. diff := now.Unix() - then.Unix()
  225. if then.After(now) {
  226. return "future"
  227. }
  228. var timeStr, diffStr string
  229. for {
  230. if diff == 0 {
  231. break
  232. }
  233. diff, diffStr = computeTimeDiff(diff)
  234. timeStr += ", " + diffStr
  235. }
  236. return strings.TrimPrefix(timeStr, ", ")
  237. }
  238. func timeSince(then time.Time, lang string) string {
  239. now := time.Now()
  240. lbl := i18n.Tr(lang, "tool.ago")
  241. diff := now.Unix() - then.Unix()
  242. if then.After(now) {
  243. lbl = i18n.Tr(lang, "tool.from_now")
  244. diff = then.Unix() - now.Unix()
  245. }
  246. switch {
  247. case diff <= 0:
  248. return i18n.Tr(lang, "tool.now")
  249. case diff <= 2:
  250. return i18n.Tr(lang, "tool.1s", lbl)
  251. case diff < 1*Minute:
  252. return i18n.Tr(lang, "tool.seconds", diff, lbl)
  253. case diff < 2*Minute:
  254. return i18n.Tr(lang, "tool.1m", lbl)
  255. case diff < 1*Hour:
  256. return i18n.Tr(lang, "tool.minutes", diff/Minute, lbl)
  257. case diff < 2*Hour:
  258. return i18n.Tr(lang, "tool.1h", lbl)
  259. case diff < 1*Day:
  260. return i18n.Tr(lang, "tool.hours", diff/Hour, lbl)
  261. case diff < 2*Day:
  262. return i18n.Tr(lang, "tool.1d", lbl)
  263. case diff < 1*Week:
  264. return i18n.Tr(lang, "tool.days", diff/Day, lbl)
  265. case diff < 2*Week:
  266. return i18n.Tr(lang, "tool.1w", lbl)
  267. case diff < 1*Month:
  268. return i18n.Tr(lang, "tool.weeks", diff/Week, lbl)
  269. case diff < 2*Month:
  270. return i18n.Tr(lang, "tool.1mon", lbl)
  271. case diff < 1*Year:
  272. return i18n.Tr(lang, "tool.months", diff/Month, lbl)
  273. case diff < 2*Year:
  274. return i18n.Tr(lang, "tool.1y", lbl)
  275. default:
  276. return i18n.Tr(lang, "tool.years", diff/Year, lbl)
  277. }
  278. }
  279. // TimeSince calculates the time interval and generate user-friendly string.
  280. func TimeSince(t time.Time, lang string) template.HTML {
  281. return template.HTML(fmt.Sprintf(`<span class="time-since" title="%s">%s</span>`, t.Format(setting.TimeFormat), timeSince(t, lang)))
  282. }
  283. const (
  284. Byte = 1
  285. KByte = Byte * 1024
  286. MByte = KByte * 1024
  287. GByte = MByte * 1024
  288. TByte = GByte * 1024
  289. PByte = TByte * 1024
  290. EByte = PByte * 1024
  291. )
  292. var bytesSizeTable = map[string]uint64{
  293. "b": Byte,
  294. "kb": KByte,
  295. "mb": MByte,
  296. "gb": GByte,
  297. "tb": TByte,
  298. "pb": PByte,
  299. "eb": EByte,
  300. }
  301. func logn(n, b float64) float64 {
  302. return math.Log(n) / math.Log(b)
  303. }
  304. func humanateBytes(s uint64, base float64, sizes []string) string {
  305. if s < 10 {
  306. return fmt.Sprintf("%dB", s)
  307. }
  308. e := math.Floor(logn(float64(s), base))
  309. suffix := sizes[int(e)]
  310. val := float64(s) / math.Pow(base, math.Floor(e))
  311. f := "%.0f"
  312. if val < 10 {
  313. f = "%.1f"
  314. }
  315. return fmt.Sprintf(f+"%s", val, suffix)
  316. }
  317. // FileSize calculates the file size and generate user-friendly string.
  318. func FileSize(s int64) string {
  319. sizes := []string{"B", "KB", "MB", "GB", "TB", "PB", "EB"}
  320. return humanateBytes(uint64(s), 1024, sizes)
  321. }
  322. // Subtract deals with subtraction of all types of number.
  323. func Subtract(left interface{}, right interface{}) interface{} {
  324. var rleft, rright int64
  325. var fleft, fright float64
  326. var isInt bool = true
  327. switch left.(type) {
  328. case int:
  329. rleft = int64(left.(int))
  330. case int8:
  331. rleft = int64(left.(int8))
  332. case int16:
  333. rleft = int64(left.(int16))
  334. case int32:
  335. rleft = int64(left.(int32))
  336. case int64:
  337. rleft = left.(int64)
  338. case float32:
  339. fleft = float64(left.(float32))
  340. isInt = false
  341. case float64:
  342. fleft = left.(float64)
  343. isInt = false
  344. }
  345. switch right.(type) {
  346. case int:
  347. rright = int64(right.(int))
  348. case int8:
  349. rright = int64(right.(int8))
  350. case int16:
  351. rright = int64(right.(int16))
  352. case int32:
  353. rright = int64(right.(int32))
  354. case int64:
  355. rright = right.(int64)
  356. case float32:
  357. fright = float64(left.(float32))
  358. isInt = false
  359. case float64:
  360. fleft = left.(float64)
  361. isInt = false
  362. }
  363. if isInt {
  364. return rleft - rright
  365. } else {
  366. return fleft + float64(rleft) - (fright + float64(rright))
  367. }
  368. }
  369. // DateFormat pattern rules.
  370. var datePatterns = []string{
  371. // year
  372. "Y", "2006", // A full numeric representation of a year, 4 digits Examples: 1999 or 2003
  373. "y", "06", //A two digit representation of a year Examples: 99 or 03
  374. // month
  375. "m", "01", // Numeric representation of a month, with leading zeros 01 through 12
  376. "n", "1", // Numeric representation of a month, without leading zeros 1 through 12
  377. "M", "Jan", // A short textual representation of a month, three letters Jan through Dec
  378. "F", "January", // A full textual representation of a month, such as January or March January through December
  379. // day
  380. "d", "02", // Day of the month, 2 digits with leading zeros 01 to 31
  381. "j", "2", // Day of the month without leading zeros 1 to 31
  382. // week
  383. "D", "Mon", // A textual representation of a day, three letters Mon through Sun
  384. "l", "Monday", // A full textual representation of the day of the week Sunday through Saturday
  385. // time
  386. "g", "3", // 12-hour format of an hour without leading zeros 1 through 12
  387. "G", "15", // 24-hour format of an hour without leading zeros 0 through 23
  388. "h", "03", // 12-hour format of an hour with leading zeros 01 through 12
  389. "H", "15", // 24-hour format of an hour with leading zeros 00 through 23
  390. "a", "pm", // Lowercase Ante meridiem and Post meridiem am or pm
  391. "A", "PM", // Uppercase Ante meridiem and Post meridiem AM or PM
  392. "i", "04", // Minutes with leading zeros 00 to 59
  393. "s", "05", // Seconds, with leading zeros 00 through 59
  394. // time zone
  395. "T", "MST",
  396. "P", "-07:00",
  397. "O", "-0700",
  398. // RFC 2822
  399. "r", time.RFC1123Z,
  400. }
  401. // Parse Date use PHP time format.
  402. func DateParse(dateString, format string) (time.Time, error) {
  403. replacer := strings.NewReplacer(datePatterns...)
  404. format = replacer.Replace(format)
  405. return time.ParseInLocation(format, dateString, time.Local)
  406. }
  407. // Date takes a PHP like date func to Go's time format.
  408. func DateFormat(t time.Time, format string) string {
  409. replacer := strings.NewReplacer(datePatterns...)
  410. format = replacer.Replace(format)
  411. return t.Format(format)
  412. }