// 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/md5" "crypto/rand" "crypto/sha1" "encoding/base64" "encoding/hex" "fmt" "html/template" "io" "math" "math/big" "net/http" "strconv" "strings" "time" "unicode" "unicode/utf8" "code.gitea.io/gitea/modules/log" "code.gitea.io/gitea/modules/setting" "github.com/Unknwon/com" "github.com/Unknwon/i18n" "github.com/gogits/chardet" ) // EncodeMD5 encodes string to md5 hex value. func EncodeMD5(str string) string { m := md5.New() m.Write([]byte(str)) return hex.EncodeToString(m.Sum(nil)) } // EncodeSha1 string to sha1 hex value. func EncodeSha1(str string) string { h := sha1.New() h.Write([]byte(str)) return hex.EncodeToString(h.Sum(nil)) } // ShortSha is basically just truncating. // It is DEPRECATED and will be removed in the future. func ShortSha(sha1 string) string { return TruncateString(sha1, 10) } // DetectEncoding detect the encoding of content func DetectEncoding(content []byte) (string, error) { if utf8.Valid(content) { log.Debug("Detected encoding: utf-8 (fast)") return "UTF-8", nil } result, err := chardet.NewTextDetector().DetectBest(content) if err != nil { return "", err } if result.Charset != "UTF-8" && len(setting.Repository.AnsiCharset) > 0 { log.Debug("Using default AnsiCharset: %s", setting.Repository.AnsiCharset) return setting.Repository.AnsiCharset, err } log.Debug("Detected encoding: %s", result.Charset) return result.Charset, err } // BasicAuthDecode decode basic auth string 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 } // BasicAuthEncode encode basic auth string func BasicAuthEncode(username, password string) string { return base64.StdEncoding.EncodeToString([]byte(username + ":" + password)) } // GetRandomString generate random string by specify chars. func GetRandomString(n int) (string, error) { const alphanum = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" buffer := make([]byte, n) max := big.NewInt(int64(len(alphanum))) for i := 0; i < n; i++ { index, err := randomInt(max) if err != nil { return "", err } buffer[i] = alphanum[index] } return string(buffer), nil } // GetRandomBytesAsBase64 generates a random base64 string from n bytes func GetRandomBytesAsBase64(n int) string { bytes := make([]byte, 32) _, err := io.ReadFull(rand.Reader, bytes) if err != nil { log.Fatal(4, "Error reading random bytes: %v", err) } return base64.RawURLEncoding.EncodeToString(bytes) } func randomInt(max *big.Int) (int, error) { rand, err := rand.Int(rand.Reader, max) if err != nil { return 0, err } return int(rand.Int64()), nil } // VerifyTimeLimitCode 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 } // TimeLimitCodeLength default value for time limit code const TimeLimitCodeLength = 12 + 6 + 40 // CreateTimeLimitCode 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 } // HashEmail hashes email address to MD5 string. // https://en.gravatar.com/site/implement/hash/ func HashEmail(email string) string { return EncodeMD5(strings.ToLower(strings.TrimSpace(email))) } // AvatarLink returns relative avatar link to the site domain by given email, // which includes app sub-url as prefix. However, it is possible // to return full URL if user enables Gravatar-like service. func AvatarLink(email string) string { if setting.EnableFederatedAvatar && setting.LibravatarService != nil { // TODO: This doesn't check any error. AvatarLink should return (string, error) url, _ := setting.LibravatarService.FromEmail(email) return url } if !setting.DisableGravatar { return setting.GravatarSource + HashEmail(email) } return setting.AppSubURL + "/img/avatar_default.png" } // 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 -= (diff / Year) * Year } return diff, diffStr } // MinutesToFriendly returns a user friendly string with number of minutes // converted to hours and minutes. func MinutesToFriendly(minutes int) string { duration := time.Duration(minutes) * time.Minute return TimeSincePro(time.Now().Add(-duration)) } // TimeSincePro calculates the time interval and generate full user-friendly string. func TimeSincePro(then time.Time) string { return timeSincePro(then, time.Now()) } func timeSincePro(then, now time.Time) string { diff := now.Unix() - then.Unix() if then.After(now) { return "future" } if diff == 0 { return "now" } var timeStr, diffStr string for { if diff == 0 { break } diff, diffStr = computeTimeDiff(diff) timeStr += ", " + diffStr } return strings.TrimPrefix(timeStr, ", ") } func timeSince(then, now time.Time, lang string) string { 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 <= 1: 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) } } // RawTimeSince retrieves i18n key of time since t func RawTimeSince(t time.Time, lang string) string { return timeSince(t, time.Now(), lang) } // TimeSince calculates the time interval and generate user-friendly string. func TimeSince(then time.Time, lang string) template.HTML { return htmlTimeSince(then, time.Now(), lang) } func htmlTimeSince(then, now time.Time, lang string) template.HTML { return template.HTML(fmt.Sprintf(`<span class="time-since" title="%s">%s</span>`, then.Format(setting.TimeFormat), timeSince(then, now, lang))) } // Storage space size types 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 = 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(right.(float32)) isInt = false case float64: fright = right.(float64) isInt = false } if isInt { return rleft - rright } return fleft + float64(rleft) - (fright + float64(rright)) } // EllipsisString returns a truncated short string, // it appends '...' in the end of the length of string is too large. func EllipsisString(str string, length int) string { if length <= 3 { return "..." } if len(str) <= length { return str } return str[:length-3] + "..." } // TruncateString returns a truncated string with given limit, // it returns input string if length is not reached limit. func TruncateString(str string, limit int) string { if len(str) < limit { return str } return str[:limit] } // StringsToInt64s converts a slice of string to a slice of int64. func StringsToInt64s(strs []string) ([]int64, error) { ints := make([]int64, len(strs)) for i := range strs { n, err := com.StrTo(strs[i]).Int64() if err != nil { return ints, err } ints[i] = n } return ints, nil } // Int64sToStrings converts a slice of int64 to a slice of string. func Int64sToStrings(ints []int64) []string { strs := make([]string, len(ints)) for i := range ints { strs[i] = strconv.FormatInt(ints[i], 10) } return strs } // Int64sToMap converts a slice of int64 to a int64 map. func Int64sToMap(ints []int64) map[int64]bool { m := make(map[int64]bool) for _, i := range ints { m[i] = true } return m } // IsLetter reports whether the rune is a letter (category L). // https://github.com/golang/go/blob/master/src/go/scanner/scanner.go#L257 func IsLetter(ch rune) bool { return 'a' <= ch && ch <= 'z' || 'A' <= ch && ch <= 'Z' || ch == '_' || ch >= 0x80 && unicode.IsLetter(ch) } // IsTextFile returns true if file content format is plain text or empty. func IsTextFile(data []byte) bool { if len(data) == 0 { return true } return strings.Index(http.DetectContentType(data), "text/") != -1 } // IsImageFile detects if data is an image format func IsImageFile(data []byte) bool { return strings.Index(http.DetectContentType(data), "image/") != -1 } // IsPDFFile detects if data is a pdf format func IsPDFFile(data []byte) bool { return strings.Index(http.DetectContentType(data), "application/pdf") != -1 } // IsVideoFile detects if data is an video format func IsVideoFile(data []byte) bool { return strings.Index(http.DetectContentType(data), "video/") != -1 }