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zhsso 2014-04-10 14:20:01 -04:00
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// 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
type (
// Type TmplData represents data in the templates.
TmplData map[string]interface{}
)

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// 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 (
"fmt"
"os"
"os/exec"
"path"
"path/filepath"
"strings"
"github.com/Unknwon/com"
"github.com/Unknwon/goconfig"
qlog "github.com/qiniu/log"
"github.com/gogits/cache"
"github.com/gogits/session"
"github.com/gogits/gogs/modules/log"
)
// Mailer represents mail service.
type Mailer struct {
Name string
Host string
User, Passwd string
}
// Oauther represents oauth service.
type Oauther struct {
GitHub struct {
Enabled bool
ClientId, ClientSecret string
Scopes string
}
}
var (
AppVer string
AppName string
AppLogo string
AppUrl string
IsProdMode bool
Domain string
SecretKey string
RunUser string
RepoRootPath string
InstallLock bool
LogInRememberDays int
CookieUserName string
CookieRememberName string
Cfg *goconfig.ConfigFile
MailService *Mailer
OauthService *Oauther
LogMode string
LogConfig string
Cache cache.Cache
CacheAdapter string
CacheConfig string
SessionProvider string
SessionConfig *session.Config
SessionManager *session.Manager
PictureService string
)
var Service struct {
RegisterEmailConfirm bool
DisenableRegisteration bool
RequireSignInView bool
EnableCacheAvatar bool
NotifyMail bool
ActiveCodeLives int
ResetPwdCodeLives int
}
func ExecDir() (string, error) {
file, err := exec.LookPath(os.Args[0])
if err != nil {
return "", err
}
p, err := filepath.Abs(file)
if err != nil {
return "", err
}
return path.Dir(strings.Replace(p, "\\", "/", -1)), nil
}
var logLevels = map[string]string{
"Trace": "0",
"Debug": "1",
"Info": "2",
"Warn": "3",
"Error": "4",
"Critical": "5",
}
func newService() {
Service.ActiveCodeLives = Cfg.MustInt("service", "ACTIVE_CODE_LIVE_MINUTES", 180)
Service.ResetPwdCodeLives = Cfg.MustInt("service", "RESET_PASSWD_CODE_LIVE_MINUTES", 180)
Service.DisenableRegisteration = Cfg.MustBool("service", "DISENABLE_REGISTERATION", false)
Service.RequireSignInView = Cfg.MustBool("service", "REQUIRE_SIGNIN_VIEW", false)
Service.EnableCacheAvatar = Cfg.MustBool("service", "ENABLE_CACHE_AVATAR", false)
}
func newLogService() {
// Get and check log mode.
LogMode = Cfg.MustValue("log", "MODE", "console")
modeSec := "log." + LogMode
if _, err := Cfg.GetSection(modeSec); err != nil {
qlog.Fatalf("Unknown log mode: %s\n", LogMode)
}
// Log level.
levelName := Cfg.MustValue("log."+LogMode, "LEVEL", "Trace")
level, ok := logLevels[levelName]
if !ok {
qlog.Fatalf("Unknown log level: %s\n", levelName)
}
// Generate log configuration.
switch LogMode {
case "console":
LogConfig = fmt.Sprintf(`{"level":%s}`, level)
case "file":
logPath := Cfg.MustValue(modeSec, "FILE_NAME", "log/gogs.log")
os.MkdirAll(path.Dir(logPath), os.ModePerm)
LogConfig = fmt.Sprintf(
`{"level":%s,"filename":"%s","rotate":%v,"maxlines":%d,"maxsize":%d,"daily":%v,"maxdays":%d}`, level,
logPath,
Cfg.MustBool(modeSec, "LOG_ROTATE", true),
Cfg.MustInt(modeSec, "MAX_LINES", 1000000),
1<<uint(Cfg.MustInt(modeSec, "MAX_SIZE_SHIFT", 28)),
Cfg.MustBool(modeSec, "DAILY_ROTATE", true),
Cfg.MustInt(modeSec, "MAX_DAYS", 7))
case "conn":
LogConfig = fmt.Sprintf(`{"level":"%s","reconnectOnMsg":%v,"reconnect":%v,"net":"%s","addr":"%s"}`, level,
Cfg.MustBool(modeSec, "RECONNECT_ON_MSG", false),
Cfg.MustBool(modeSec, "RECONNECT", false),
Cfg.MustValue(modeSec, "PROTOCOL", "tcp"),
Cfg.MustValue(modeSec, "ADDR", ":7020"))
case "smtp":
LogConfig = fmt.Sprintf(`{"level":"%s","username":"%s","password":"%s","host":"%s","sendTos":"%s","subject":"%s"}`, level,
Cfg.MustValue(modeSec, "USER", "example@example.com"),
Cfg.MustValue(modeSec, "PASSWD", "******"),
Cfg.MustValue(modeSec, "HOST", "127.0.0.1:25"),
Cfg.MustValue(modeSec, "RECEIVERS", "[]"),
Cfg.MustValue(modeSec, "SUBJECT", "Diagnostic message from serve"))
case "database":
LogConfig = fmt.Sprintf(`{"level":"%s","driver":"%s","conn":"%s"}`, level,
Cfg.MustValue(modeSec, "Driver"),
Cfg.MustValue(modeSec, "CONN"))
}
log.Info("%s %s", AppName, AppVer)
log.NewLogger(Cfg.MustInt64("log", "BUFFER_LEN", 10000), LogMode, LogConfig)
log.Info("Log Mode: %s(%s)", strings.Title(LogMode), levelName)
}
func newCacheService() {
CacheAdapter = Cfg.MustValue("cache", "ADAPTER", "memory")
switch CacheAdapter {
case "memory":
CacheConfig = fmt.Sprintf(`{"interval":%d}`, Cfg.MustInt("cache", "INTERVAL", 60))
case "redis", "memcache":
CacheConfig = fmt.Sprintf(`{"conn":"%s"}`, Cfg.MustValue("cache", "HOST"))
default:
qlog.Fatalf("Unknown cache adapter: %s\n", CacheAdapter)
}
var err error
Cache, err = cache.NewCache(CacheAdapter, CacheConfig)
if err != nil {
qlog.Fatalf("Init cache system failed, adapter: %s, config: %s, %v\n",
CacheAdapter, CacheConfig, err)
}
log.Info("Cache Service Enabled")
}
func newSessionService() {
SessionProvider = Cfg.MustValue("session", "PROVIDER", "memory")
SessionConfig = new(session.Config)
SessionConfig.ProviderConfig = Cfg.MustValue("session", "PROVIDER_CONFIG")
SessionConfig.CookieName = Cfg.MustValue("session", "COOKIE_NAME", "i_like_gogits")
SessionConfig.CookieSecure = Cfg.MustBool("session", "COOKIE_SECURE")
SessionConfig.EnableSetCookie = Cfg.MustBool("session", "ENABLE_SET_COOKIE", true)
SessionConfig.GcIntervalTime = Cfg.MustInt64("session", "GC_INTERVAL_TIME", 86400)
SessionConfig.SessionLifeTime = Cfg.MustInt64("session", "SESSION_LIFE_TIME", 86400)
SessionConfig.SessionIDHashFunc = Cfg.MustValue("session", "SESSION_ID_HASHFUNC", "sha1")
SessionConfig.SessionIDHashKey = Cfg.MustValue("session", "SESSION_ID_HASHKEY")
if SessionProvider == "file" {
os.MkdirAll(path.Dir(SessionConfig.ProviderConfig), os.ModePerm)
}
var err error
SessionManager, err = session.NewManager(SessionProvider, *SessionConfig)
if err != nil {
qlog.Fatalf("Init session system failed, provider: %s, %v\n",
SessionProvider, err)
}
log.Info("Session Service Enabled")
}
func newMailService() {
// Check mailer setting.
if !Cfg.MustBool("mailer", "ENABLED") {
return
}
MailService = &Mailer{
Name: Cfg.MustValue("mailer", "NAME", AppName),
Host: Cfg.MustValue("mailer", "HOST"),
User: Cfg.MustValue("mailer", "USER"),
Passwd: Cfg.MustValue("mailer", "PASSWD"),
}
log.Info("Mail Service Enabled")
}
func newRegisterMailService() {
if !Cfg.MustBool("service", "REGISTER_EMAIL_CONFIRM") {
return
} else if MailService == nil {
log.Warn("Register Mail Service: Mail Service is not enabled")
return
}
Service.RegisterEmailConfirm = true
log.Info("Register Mail Service Enabled")
}
func newNotifyMailService() {
if !Cfg.MustBool("service", "ENABLE_NOTIFY_MAIL") {
return
} else if MailService == nil {
log.Warn("Notify Mail Service: Mail Service is not enabled")
return
}
Service.NotifyMail = true
log.Info("Notify Mail Service Enabled")
}
func newOauthService() {
if !Cfg.MustBool("oauth", "ENABLED") {
return
}
OauthService = &Oauther{}
oauths := make([]string, 0, 10)
// GitHub.
if Cfg.MustBool("oauth.github", "ENABLED") {
OauthService.GitHub.Enabled = true
OauthService.GitHub.ClientId = Cfg.MustValue("oauth.github", "CLIENT_ID")
OauthService.GitHub.ClientSecret = Cfg.MustValue("oauth.github", "CLIENT_SECRET")
OauthService.GitHub.Scopes = Cfg.MustValue("oauth.github", "SCOPES")
oauths = append(oauths, "GitHub")
}
log.Info("Oauth Service Enabled %s", oauths)
}
func NewConfigContext() {
//var err error
workDir, err := ExecDir()
if err != nil {
qlog.Fatalf("Fail to get work directory: %s\n", err)
}
cfgPath := filepath.Join(workDir, "conf/app.ini")
Cfg, err = goconfig.LoadConfigFile(cfgPath)
if err != nil {
qlog.Fatalf("Cannot load config file(%s): %v\n", cfgPath, err)
}
Cfg.BlockMode = false
cfgPath = filepath.Join(workDir, "custom/conf/app.ini")
if com.IsFile(cfgPath) {
if err = Cfg.AppendFiles(cfgPath); err != nil {
qlog.Fatalf("Cannot load config file(%s): %v\n", cfgPath, err)
}
}
AppName = Cfg.MustValue("", "APP_NAME", "Gogs: Go Git Service")
AppLogo = Cfg.MustValue("", "APP_LOGO", "img/favicon.png")
AppUrl = Cfg.MustValue("server", "ROOT_URL")
Domain = Cfg.MustValue("server", "DOMAIN")
SecretKey = Cfg.MustValue("security", "SECRET_KEY")
InstallLock = Cfg.MustBool("security", "INSTALL_LOCK", false)
RunUser = Cfg.MustValue("", "RUN_USER")
curUser := os.Getenv("USERNAME")
if len(curUser) == 0 {
curUser = os.Getenv("USER")
}
// Does not check run user when the install lock is off.
if InstallLock && RunUser != curUser {
qlog.Fatalf("Expect user(%s) but current user is: %s\n", RunUser, curUser)
}
LogInRememberDays = Cfg.MustInt("security", "LOGIN_REMEMBER_DAYS")
CookieUserName = Cfg.MustValue("security", "COOKIE_USERNAME")
CookieRememberName = Cfg.MustValue("security", "COOKIE_REMEMBER_NAME")
PictureService = Cfg.MustValue("picture", "SERVICE")
// Determine and create root git reposiroty path.
homeDir, err := com.HomeDir()
if err != nil {
qlog.Fatalf("Fail to get home directory): %v\n", err)
}
RepoRootPath = Cfg.MustValue("repository", "ROOT", filepath.Join(homeDir, "gogs-repositories"))
if err = os.MkdirAll(RepoRootPath, os.ModePerm); err != nil {
qlog.Fatalf("Fail to create RepoRootPath(%s): %v\n", RepoRootPath, err)
}
}
func NewServices() {
newService()
newLogService()
newCacheService()
newSessionService()
newMailService()
newRegisterMailService()
newNotifyMailService()
newOauthService()
}

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// 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 (
"bytes"
"fmt"
"net/http"
"path"
"path/filepath"
"regexp"
"strings"
"github.com/gogits/gfm"
)
func isletter(c byte) bool {
return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')
}
func isalnum(c byte) bool {
return (c >= '0' && c <= '9') || isletter(c)
}
var validLinks = [][]byte{[]byte("http://"), []byte("https://"), []byte("ftp://"), []byte("mailto://")}
func isLink(link []byte) bool {
for _, prefix := range validLinks {
if len(link) > len(prefix) && bytes.Equal(bytes.ToLower(link[:len(prefix)]), prefix) && isalnum(link[len(prefix)]) {
return true
}
}
return false
}
func IsMarkdownFile(name string) bool {
name = strings.ToLower(name)
switch filepath.Ext(name) {
case ".md", ".markdown", ".mdown":
return true
}
return false
}
func IsTextFile(data []byte) (string, bool) {
contentType := http.DetectContentType(data)
if strings.Index(contentType, "text/") != -1 {
return contentType, true
}
return contentType, false
}
func IsImageFile(data []byte) (string, bool) {
contentType := http.DetectContentType(data)
if strings.Index(contentType, "image/") != -1 {
return contentType, true
}
return contentType, false
}
func IsReadmeFile(name string) bool {
name = strings.ToLower(name)
if len(name) < 6 {
return false
}
if name[:6] == "readme" {
return true
}
return false
}
type CustomRender struct {
gfm.Renderer
urlPrefix string
}
func (options *CustomRender) Link(out *bytes.Buffer, link []byte, title []byte, content []byte) {
if len(link) > 0 && !isLink(link) {
if link[0] == '#' {
// link = append([]byte(options.urlPrefix), link...)
} else {
link = []byte(path.Join(options.urlPrefix, string(link)))
}
}
options.Renderer.Link(out, link, title, content)
}
var (
MentionPattern = regexp.MustCompile(`@[0-9a-zA-Z_]{1,}`)
commitPattern = regexp.MustCompile(`(\s|^)https?.*commit/[0-9a-zA-Z]+(#+[0-9a-zA-Z-]*)?`)
issueFullPattern = regexp.MustCompile(`(\s|^)https?.*issues/[0-9]+(#+[0-9a-zA-Z-]*)?`)
issueIndexPattern = regexp.MustCompile(`#[0-9]+`)
)
func RenderSpecialLink(rawBytes []byte, urlPrefix string) []byte {
ms := MentionPattern.FindAll(rawBytes, -1)
for _, m := range ms {
rawBytes = bytes.Replace(rawBytes, m,
[]byte(fmt.Sprintf(`<a href="/user/%s">%s</a>`, m[1:], m)), -1)
}
ms = commitPattern.FindAll(rawBytes, -1)
for _, m := range ms {
m = bytes.TrimSpace(m)
i := strings.Index(string(m), "commit/")
j := strings.Index(string(m), "#")
if j == -1 {
j = len(m)
}
rawBytes = bytes.Replace(rawBytes, m, []byte(fmt.Sprintf(
` <code><a href="%s">%s</a></code>`, m, ShortSha(string(m[i+7:j])))), -1)
}
ms = issueFullPattern.FindAll(rawBytes, -1)
for _, m := range ms {
m = bytes.TrimSpace(m)
i := strings.Index(string(m), "issues/")
j := strings.Index(string(m), "#")
if j == -1 {
j = len(m)
}
rawBytes = bytes.Replace(rawBytes, m, []byte(fmt.Sprintf(
` <a href="%s">#%s</a>`, m, ShortSha(string(m[i+7:j])))), -1)
}
ms = issueIndexPattern.FindAll(rawBytes, -1)
for _, m := range ms {
rawBytes = bytes.Replace(rawBytes, m, []byte(fmt.Sprintf(
`<a href="%s/issues/%s">%s</a>`, urlPrefix, m[1:], m)), -1)
}
return rawBytes
}
func RenderMarkdown(rawBytes []byte, urlPrefix string) []byte {
body := RenderSpecialLink(rawBytes, urlPrefix)
// fmt.Println(string(body))
htmlFlags := 0
// htmlFlags |= gfm.HTML_USE_XHTML
// htmlFlags |= gfm.HTML_USE_SMARTYPANTS
// htmlFlags |= gfm.HTML_SMARTYPANTS_FRACTIONS
// htmlFlags |= gfm.HTML_SMARTYPANTS_LATEX_DASHES
// htmlFlags |= gfm.HTML_SKIP_HTML
htmlFlags |= gfm.HTML_SKIP_STYLE
htmlFlags |= gfm.HTML_SKIP_SCRIPT
htmlFlags |= gfm.HTML_GITHUB_BLOCKCODE
htmlFlags |= gfm.HTML_OMIT_CONTENTS
// htmlFlags |= gfm.HTML_COMPLETE_PAGE
renderer := &CustomRender{
Renderer: gfm.HtmlRenderer(htmlFlags, "", ""),
urlPrefix: urlPrefix,
}
// set up the parser
extensions := 0
extensions |= gfm.EXTENSION_NO_INTRA_EMPHASIS
extensions |= gfm.EXTENSION_TABLES
extensions |= gfm.EXTENSION_FENCED_CODE
extensions |= gfm.EXTENSION_AUTOLINK
extensions |= gfm.EXTENSION_STRIKETHROUGH
extensions |= gfm.EXTENSION_HARD_LINE_BREAK
extensions |= gfm.EXTENSION_SPACE_HEADERS
extensions |= gfm.EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK
body = gfm.Markdown(body, renderer, extensions)
// fmt.Println(string(body))
return body
}

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// 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 (
"bytes"
"container/list"
"encoding/json"
"fmt"
"html/template"
"strings"
"time"
)
func Str2html(raw string) template.HTML {
return template.HTML(raw)
}
func Range(l int) []int {
return make([]int, l)
}
func List(l *list.List) chan interface{} {
e := l.Front()
c := make(chan interface{})
go func() {
for e != nil {
c <- e.Value
e = e.Next()
}
close(c)
}()
return c
}
func ShortSha(sha1 string) string {
if len(sha1) == 40 {
return sha1[:10]
}
return sha1
}
var mailDomains = map[string]string{
"gmail.com": "gmail.com",
}
var TemplateFuncs template.FuncMap = map[string]interface{}{
"AppName": func() string {
return AppName
},
"AppVer": func() string {
return AppVer
},
"AppDomain": func() string {
return Domain
},
"IsProdMode": func() bool {
return IsProdMode
},
"LoadTimes": func(startTime time.Time) string {
return fmt.Sprint(time.Since(startTime).Nanoseconds()/1e6) + "ms"
},
"AvatarLink": AvatarLink,
"str2html": Str2html,
"TimeSince": TimeSince,
"FileSize": FileSize,
"Subtract": Subtract,
"ActionIcon": ActionIcon,
"ActionDesc": ActionDesc,
"DateFormat": DateFormat,
"List": List,
"Mail2Domain": func(mail string) string {
if !strings.Contains(mail, "@") {
return "try.gogits.org"
}
suffix := strings.SplitN(mail, "@", 2)[1]
domain, ok := mailDomains[suffix]
if !ok {
return "mail." + suffix
}
return domain
},
"SubStr": func(str string, start, length int) string {
return str[start : start+length]
},
"DiffTypeToStr": DiffTypeToStr,
"DiffLineTypeToStr": DiffLineTypeToStr,
"ShortSha": ShortSha,
}
type Actioner interface {
GetOpType() int
GetActUserName() string
GetActEmail() string
GetRepoName() string
GetBranch() string
GetContent() string
}
// ActionIcon accepts a int that represents action operation type
// and returns a icon class name.
func ActionIcon(opType int) string {
switch opType {
case 1: // Create repository.
return "plus-circle"
case 5: // Commit repository.
return "arrow-circle-o-right"
case 6: // Create issue.
return "exclamation-circle"
case 8: // Transfer repository.
return "share"
default:
return "invalid type"
}
}
const (
TPL_CREATE_REPO = `<a href="/user/%s">%s</a> created repository <a href="/%s">%s</a>`
TPL_COMMIT_REPO = `<a href="/user/%s">%s</a> pushed to <a href="/%s/src/%s">%s</a> at <a href="/%s">%s</a>%s`
TPL_COMMIT_REPO_LI = `<div><img src="%s?s=16" alt="user-avatar"/> <a href="/%s/commit/%s">%s</a> %s</div>`
TPL_CREATE_ISSUE = `<a href="/user/%s">%s</a> opened issue <a href="/%s/issues/%s">%s#%s</a>
<div><img src="%s?s=16" alt="user-avatar"/> %s</div>`
TPL_TRANSFER_REPO = `<a href="/user/%s">%s</a> transfered repository <code>%s</code> to <a href="/%s">%s</a>`
)
type PushCommit struct {
Sha1 string
Message string
AuthorEmail string
AuthorName string
}
type PushCommits struct {
Len int
Commits []*PushCommit
}
// ActionDesc accepts int that represents action operation type
// and returns the description.
func ActionDesc(act Actioner) string {
actUserName := act.GetActUserName()
email := act.GetActEmail()
repoName := act.GetRepoName()
repoLink := actUserName + "/" + repoName
branch := act.GetBranch()
content := act.GetContent()
switch act.GetOpType() {
case 1: // Create repository.
return fmt.Sprintf(TPL_CREATE_REPO, actUserName, actUserName, repoLink, repoName)
case 5: // Commit repository.
var push *PushCommits
if err := json.Unmarshal([]byte(content), &push); err != nil {
return err.Error()
}
buf := bytes.NewBuffer([]byte("\n"))
for _, commit := range push.Commits {
buf.WriteString(fmt.Sprintf(TPL_COMMIT_REPO_LI, AvatarLink(commit.AuthorEmail), repoLink, commit.Sha1, commit.Sha1[:7], commit.Message) + "\n")
}
if push.Len > 3 {
buf.WriteString(fmt.Sprintf(`<div><a href="/%s/%s/commits/%s">%d other commits >></a></div>`, actUserName, repoName, branch, push.Len))
}
return fmt.Sprintf(TPL_COMMIT_REPO, actUserName, actUserName, repoLink, branch, branch, repoLink, repoLink,
buf.String())
case 6: // Create issue.
infos := strings.SplitN(content, "|", 2)
return fmt.Sprintf(TPL_CREATE_ISSUE, actUserName, actUserName, repoLink, infos[0], repoLink, infos[0],
AvatarLink(email), infos[1])
case 8: // Transfer repository.
newRepoLink := content + "/" + repoName
return fmt.Sprintf(TPL_TRANSFER_REPO, actUserName, actUserName, repoLink, newRepoLink, newRepoLink)
default:
return "invalid type"
}
}
func DiffTypeToStr(diffType int) string {
diffTypes := map[int]string{
1: "add", 2: "modify", 3: "del",
}
return diffTypes[diffType]
}
func DiffLineTypeToStr(diffType int) string {
switch diffType {
case 2:
return "add"
case 3:
return "del"
case 4:
return "tag"
}
return "same"
}

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// 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/hex"
"fmt"
"hash"
"math"
"strconv"
"strings"
"time"
)
// Encode string to md5 hex value
func EncodeMd5(str string) string {
m := md5.New()
m.Write([]byte(str))
return hex.EncodeToString(m.Sum(nil))
}
// 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 := 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, _ := DateParse(start, "YmdHi")
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 := "YmdHi"
var start, end time.Time
var startStr, endStr string
if startInf == nil {
// Use now time create code
start = time.Now()
startStr = DateFormat(start, format)
} else {
// use start string create code
startStr = startInf.(string)
start, _ = DateParse(startStr, format)
startStr = DateFormat(start, format)
}
end = start.Add(time.Minute * time.Duration(minutes))
endStr = DateFormat(end, format)
// create sha1 encode string
sh := sha1.New()
sh.Write([]byte(data + SecretKey + startStr + endStr + 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 Service.EnableCacheAvatar {
return "/avatar/" + EncodeMd5(email)
}
return "http://1.gravatar.com/avatar/" + EncodeMd5(email)
}
// 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, ", ")
}
// TimeSince calculates the time interval and generate user-friendly string.
func TimeSince(then time.Time) string {
now := time.Now()
lbl := "ago"
diff := now.Unix() - then.Unix()
if then.After(now) {
lbl = "from now"
diff = then.Unix() - now.Unix()
}
switch {
case diff <= 0:
return "now"
case diff <= 2:
return fmt.Sprintf("1 second %s", lbl)
case diff < 1*Minute:
return fmt.Sprintf("%d seconds %s", diff, lbl)
case diff < 2*Minute:
return fmt.Sprintf("1 minute %s", lbl)
case diff < 1*Hour:
return fmt.Sprintf("%d minutes %s", diff/Minute, lbl)
case diff < 2*Hour:
return fmt.Sprintf("1 hour %s", lbl)
case diff < 1*Day:
return fmt.Sprintf("%d hours %s", diff/Hour, lbl)
case diff < 2*Day:
return fmt.Sprintf("1 day %s", lbl)
case diff < 1*Week:
return fmt.Sprintf("%d days %s", diff/Day, lbl)
case diff < 2*Week:
return fmt.Sprintf("1 week %s", lbl)
case diff < 1*Month:
return fmt.Sprintf("%d weeks %s", diff/Week, lbl)
case diff < 2*Month:
return fmt.Sprintf("1 month %s", lbl)
case diff < 1*Year:
return fmt.Sprintf("%d months %s", diff/Month, lbl)
case diff < 2*Year:
return fmt.Sprintf("1 year %s", lbl)
default:
return fmt.Sprintf("%d years %s", diff/Year, lbl)
}
return then.String()
}
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))
}
}
// DateFormat pattern rules.
var datePatterns = []string{
// year
"Y", "2006", // A full numeric representation of a year, 4 digits Examples: 1999 or 2003
"y", "06", //A two digit representation of a year Examples: 99 or 03
// month
"m", "01", // Numeric representation of a month, with leading zeros 01 through 12
"n", "1", // Numeric representation of a month, without leading zeros 1 through 12
"M", "Jan", // A short textual representation of a month, three letters Jan through Dec
"F", "January", // A full textual representation of a month, such as January or March January through December
// day
"d", "02", // Day of the month, 2 digits with leading zeros 01 to 31
"j", "2", // Day of the month without leading zeros 1 to 31
// week
"D", "Mon", // A textual representation of a day, three letters Mon through Sun
"l", "Monday", // A full textual representation of the day of the week Sunday through Saturday
// time
"g", "3", // 12-hour format of an hour without leading zeros 1 through 12
"G", "15", // 24-hour format of an hour without leading zeros 0 through 23
"h", "03", // 12-hour format of an hour with leading zeros 01 through 12
"H", "15", // 24-hour format of an hour with leading zeros 00 through 23
"a", "pm", // Lowercase Ante meridiem and Post meridiem am or pm
"A", "PM", // Uppercase Ante meridiem and Post meridiem AM or PM
"i", "04", // Minutes with leading zeros 00 to 59
"s", "05", // Seconds, with leading zeros 00 through 59
// time zone
"T", "MST",
"P", "-07:00",
"O", "-0700",
// RFC 2822
"r", time.RFC1123Z,
}
// Parse Date use PHP time format.
func DateParse(dateString, format string) (time.Time, error) {
replacer := strings.NewReplacer(datePatterns...)
format = replacer.Replace(format)
return time.ParseInLocation(format, dateString, time.Local)
}
// Date takes a PHP like date func to Go's time format.
func DateFormat(t time.Time, format string) string {
replacer := strings.NewReplacer(datePatterns...)
format = replacer.Replace(format)
return t.Format(format)
}
// convert string to specify type
type StrTo string
func (f StrTo) Exist() bool {
return string(f) != string(0x1E)
}
func (f StrTo) Int() (int, error) {
v, err := strconv.ParseInt(f.String(), 10, 32)
return int(v), err
}
func (f StrTo) Int64() (int64, error) {
v, err := strconv.ParseInt(f.String(), 10, 64)
return int64(v), err
}
func (f StrTo) String() string {
if f.Exist() {
return string(f)
}
return ""
}
// convert any type to string
func ToStr(value interface{}, args ...int) (s string) {
switch v := value.(type) {
case bool:
s = strconv.FormatBool(v)
case float32:
s = strconv.FormatFloat(float64(v), 'f', argInt(args).Get(0, -1), argInt(args).Get(1, 32))
case float64:
s = strconv.FormatFloat(v, 'f', argInt(args).Get(0, -1), argInt(args).Get(1, 64))
case int:
s = strconv.FormatInt(int64(v), argInt(args).Get(0, 10))
case int8:
s = strconv.FormatInt(int64(v), argInt(args).Get(0, 10))
case int16:
s = strconv.FormatInt(int64(v), argInt(args).Get(0, 10))
case int32:
s = strconv.FormatInt(int64(v), argInt(args).Get(0, 10))
case int64:
s = strconv.FormatInt(v, argInt(args).Get(0, 10))
case uint:
s = strconv.FormatUint(uint64(v), argInt(args).Get(0, 10))
case uint8:
s = strconv.FormatUint(uint64(v), argInt(args).Get(0, 10))
case uint16:
s = strconv.FormatUint(uint64(v), argInt(args).Get(0, 10))
case uint32:
s = strconv.FormatUint(uint64(v), argInt(args).Get(0, 10))
case uint64:
s = strconv.FormatUint(v, argInt(args).Get(0, 10))
case string:
s = v
case []byte:
s = string(v)
default:
s = fmt.Sprintf("%v", v)
}
return s
}
type argInt []int
func (a argInt) Get(i int, args ...int) (r int) {
if i >= 0 && i < len(a) {
r = a[i]
}
if len(args) > 0 {
r = args[0]
}
return
}