aiforge/modules/setting/setting.go

// Copyright 2014 The Gogs Authors. All rights reserved.
// Copyright 2017 The Gitea 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 setting

import (
	"encoding/base64"
	"fmt"
	"net"
	"net/mail"
	"net/url"
	"os"
	"os/exec"
	"path"
	"path/filepath"
	"regexp"
	"runtime"
	"strconv"
	"strings"
	"time"

	"code.gitea.io/git"
	"code.gitea.io/gitea/modules/generate"
	"code.gitea.io/gitea/modules/log"
	_ "code.gitea.io/gitea/modules/minwinsvc" // import minwinsvc for windows services
	"code.gitea.io/gitea/modules/user"

	"github.com/Unknwon/com"
	_ "github.com/go-macaron/cache/memcache" // memcache plugin for cache
	_ "github.com/go-macaron/cache/redis"
	"github.com/go-macaron/session"
	_ "github.com/go-macaron/session/redis" // redis plugin for store session
	"github.com/go-xorm/core"
	"github.com/kballard/go-shellquote"
	"gopkg.in/ini.v1"
	"strk.kbt.io/projects/go/libravatar"
)

// Scheme describes protocol types
type Scheme string

// enumerates all the scheme types
const (
	HTTP       Scheme = "http"
	HTTPS      Scheme = "https"
	FCGI       Scheme = "fcgi"
	UnixSocket Scheme = "unix"
)

// LandingPage describes the default page
type LandingPage string

// enumerates all the landing page types
const (
	LandingPageHome          LandingPage = "/"
	LandingPageExplore       LandingPage = "/explore"
	LandingPageOrganizations LandingPage = "/explore/organizations"
)

// MarkupParser defines the external parser configured in ini
type MarkupParser struct {
	Enabled        bool
	MarkupName     string
	Command        string
	FileExtensions []string
	IsInputFile    bool
}

// enumerates all the policy repository creating
const (
	RepoCreatingLastUserVisibility = "last"
	RepoCreatingPrivate            = "private"
	RepoCreatingPublic             = "public"
)

// enumerates all the types of captchas
const (
	ImageCaptcha = "image"
	ReCaptcha    = "recaptcha"
)

// settings
var (
	// AppVer settings
	AppVer         string
	AppBuiltWith   string
	AppName        string
	AppURL         string
	AppSubURL      string
	AppSubURLDepth int // Number of slashes
	AppPath        string
	AppDataPath    string
	AppWorkPath    string

	// Server settings
	Protocol             Scheme
	Domain               string
	HTTPAddr             string
	HTTPPort             string
	LocalURL             string
	RedirectOtherPort    bool
	PortToRedirect       string
	OfflineMode          bool
	DisableRouterLog     bool
	CertFile             string
	KeyFile              string
	StaticRootPath       string
	EnableGzip           bool
	LandingPageURL       LandingPage
	UnixSocketPermission uint32
	EnablePprof          bool
	PprofDataPath        string
	EnableLetsEncrypt    bool
	LetsEncryptTOS       bool
	LetsEncryptDirectory string
	LetsEncryptEmail     string

	SSH = struct {
		Disabled             bool           `ini:"DISABLE_SSH"`
		StartBuiltinServer   bool           `ini:"START_SSH_SERVER"`
		BuiltinServerUser    string         `ini:"BUILTIN_SSH_SERVER_USER"`
		Domain               string         `ini:"SSH_DOMAIN"`
		Port                 int            `ini:"SSH_PORT"`
		ListenHost           string         `ini:"SSH_LISTEN_HOST"`
		ListenPort           int            `ini:"SSH_LISTEN_PORT"`
		RootPath             string         `ini:"SSH_ROOT_PATH"`
		ServerCiphers        []string       `ini:"SSH_SERVER_CIPHERS"`
		ServerKeyExchanges   []string       `ini:"SSH_SERVER_KEY_EXCHANGES"`
		ServerMACs           []string       `ini:"SSH_SERVER_MACS"`
		KeyTestPath          string         `ini:"SSH_KEY_TEST_PATH"`
		KeygenPath           string         `ini:"SSH_KEYGEN_PATH"`
		AuthorizedKeysBackup bool           `ini:"SSH_AUTHORIZED_KEYS_BACKUP"`
		MinimumKeySizeCheck  bool           `ini:"-"`
		MinimumKeySizes      map[string]int `ini:"-"`
		ExposeAnonymous      bool           `ini:"SSH_EXPOSE_ANONYMOUS"`
	}{
		Disabled:           false,
		StartBuiltinServer: false,
		Domain:             "",
		Port:               22,
		ServerCiphers:      []string{"aes128-ctr", "aes192-ctr", "aes256-ctr", "aes128-gcm@openssh.com", "arcfour256", "arcfour128"},
		ServerKeyExchanges: []string{"diffie-hellman-group1-sha1", "diffie-hellman-group14-sha1", "ecdh-sha2-nistp256", "ecdh-sha2-nistp384", "ecdh-sha2-nistp521", "curve25519-sha256@libssh.org"},
		ServerMACs:         []string{"hmac-sha2-256-etm@openssh.com", "hmac-sha2-256", "hmac-sha1", "hmac-sha1-96"},
		KeygenPath:         "ssh-keygen",
	}

	LFS struct {
		StartServer     bool          `ini:"LFS_START_SERVER"`
		ContentPath     string        `ini:"LFS_CONTENT_PATH"`
		JWTSecretBase64 string        `ini:"LFS_JWT_SECRET"`
		JWTSecretBytes  []byte        `ini:"-"`
		HTTPAuthExpiry  time.Duration `ini:"LFS_HTTP_AUTH_EXPIRY"`
	}

	// Security settings
	InstallLock          bool
	SecretKey            string
	LogInRememberDays    int
	CookieUserName       string
	CookieRememberName   string
	ReverseProxyAuthUser string
	MinPasswordLength    int
	ImportLocalPaths     bool
	DisableGitHooks      bool

	// Database settings
	UseSQLite3    bool
	UseMySQL      bool
	UseMSSQL      bool
	UsePostgreSQL bool
	UseTiDB       bool
	LogSQL        bool

	// Indexer settings
	Indexer struct {
		IssuePath          string
		RepoIndexerEnabled bool
		RepoPath           string
		UpdateQueueLength  int
		MaxIndexerFileSize int64
	}

	// Webhook settings
	Webhook = struct {
		QueueLength    int
		DeliverTimeout int
		SkipTLSVerify  bool
		Types          []string
		PagingNum      int
	}{
		QueueLength:    1000,
		DeliverTimeout: 5,
		SkipTLSVerify:  false,
		PagingNum:      10,
	}

	// Repository settings
	Repository = struct {
		AnsiCharset            string
		ForcePrivate           bool
		DefaultPrivate         string
		MaxCreationLimit       int
		MirrorQueueLength      int
		PullRequestQueueLength int
		PreferredLicenses      []string
		DisableHTTPGit         bool
		UseCompatSSHURI        bool

		// Repository editor settings
		Editor struct {
			LineWrapExtensions   []string
			PreviewableFileModes []string
		} `ini:"-"`

		// Repository upload settings
		Upload struct {
			Enabled      bool
			TempPath     string
			AllowedTypes []string `delim:"|"`
			FileMaxSize  int64
			MaxFiles     int
		} `ini:"-"`

		// Repository local settings
		Local struct {
			LocalCopyPath string
			LocalWikiPath string
		} `ini:"-"`

		// Pull request settings
		PullRequest struct {
			WorkInProgressPrefixes []string
		} `ini:"repository.pull-request"`
	}{
		AnsiCharset:            "",
		ForcePrivate:           false,
		DefaultPrivate:         RepoCreatingLastUserVisibility,
		MaxCreationLimit:       -1,
		MirrorQueueLength:      1000,
		PullRequestQueueLength: 1000,
		PreferredLicenses:      []string{"Apache License 2.0,MIT License"},
		DisableHTTPGit:         false,
		UseCompatSSHURI:        false,

		// Repository editor settings
		Editor: struct {
			LineWrapExtensions   []string
			PreviewableFileModes []string
		}{
			LineWrapExtensions:   strings.Split(".txt,.md,.markdown,.mdown,.mkd,", ","),
			PreviewableFileModes: []string{"markdown"},
		},

		// Repository upload settings
		Upload: struct {
			Enabled      bool
			TempPath     string
			AllowedTypes []string `delim:"|"`
			FileMaxSize  int64
			MaxFiles     int
		}{
			Enabled:      true,
			TempPath:     "data/tmp/uploads",
			AllowedTypes: []string{},
			FileMaxSize:  3,
			MaxFiles:     5,
		},

		// Repository local settings
		Local: struct {
			LocalCopyPath string
			LocalWikiPath string
		}{
			LocalCopyPath: "tmp/local-repo",
			LocalWikiPath: "tmp/local-wiki",
		},

		// Pull request settings
		PullRequest: struct {
			WorkInProgressPrefixes []string
		}{
			WorkInProgressPrefixes: defaultPullRequestWorkInProgressPrefixes,
		},
	}
	RepoRootPath string
	ScriptType   = "bash"

	// UI settings
	UI = struct {
		ExplorePagingNum    int
		IssuePagingNum      int
		RepoSearchPagingNum int
		FeedMaxCommitNum    int
		GraphMaxCommitNum   int
		CodeCommentLines    int
		ReactionMaxUserNum  int
		ThemeColorMetaTag   string
		MaxDisplayFileSize  int64
		ShowUserEmail       bool
		DefaultTheme        string
		HeatmapColorRange   string

		Admin struct {
			UserPagingNum   int
			RepoPagingNum   int
			NoticePagingNum int
			OrgPagingNum    int
		} `ini:"ui.admin"`
		User struct {
			RepoPagingNum int
		} `ini:"ui.user"`
		Meta struct {
			Author      string
			Description string
			Keywords    string
		} `ini:"ui.meta"`
	}{
		ExplorePagingNum:    20,
		IssuePagingNum:      10,
		RepoSearchPagingNum: 10,
		FeedMaxCommitNum:    5,
		GraphMaxCommitNum:   100,
		CodeCommentLines:    4,
		ReactionMaxUserNum:  10,
		ThemeColorMetaTag:   `#6cc644`,
		MaxDisplayFileSize:  8388608,
		DefaultTheme:        `gitea`,
		HeatmapColorRange:   `['#f4f4f4', '#459928']`,
		Admin: struct {
			UserPagingNum   int
			RepoPagingNum   int
			NoticePagingNum int
			OrgPagingNum    int
		}{
			UserPagingNum:   50,
			RepoPagingNum:   50,
			NoticePagingNum: 25,
			OrgPagingNum:    50,
		},
		User: struct {
			RepoPagingNum int
		}{
			RepoPagingNum: 15,
		},
		Meta: struct {
			Author      string
			Description string
			Keywords    string
		}{
			Author:      "Gitea - Git with a cup of tea",
			Description: "Gitea (Git with a cup of tea) is a painless self-hosted Git service written in Go",
			Keywords:    "go,git,self-hosted,gitea",
		},
	}

	// Markdown settings
	Markdown = struct {
		EnableHardLineBreak bool
		CustomURLSchemes    []string `ini:"CUSTOM_URL_SCHEMES"`
		FileExtensions      []string
	}{
		EnableHardLineBreak: false,
		FileExtensions:      strings.Split(".md,.markdown,.mdown,.mkd", ","),
	}

	// Admin settings
	Admin struct {
		DisableRegularOrgCreation bool
	}

	// Picture settings
	AvatarUploadPath      string
	AvatarMaxWidth        int
	AvatarMaxHeight       int
	GravatarSource        string
	GravatarSourceURL     *url.URL
	DisableGravatar       bool
	EnableFederatedAvatar bool
	LibravatarService     *libravatar.Libravatar

	// Log settings
	LogLevel    string
	LogRootPath string
	LogModes    []string
	LogConfigs  []string

	// Attachment settings
	AttachmentPath         string
	AttachmentAllowedTypes string
	AttachmentMaxSize      int64
	AttachmentMaxFiles     int
	AttachmentEnabled      bool

	// Time settings
	TimeFormat string

	// Session settings
	SessionConfig  session.Options
	CSRFCookieName = "_csrf"

	// Cron tasks
	Cron = struct {
		UpdateMirror struct {
			Enabled    bool
			RunAtStart bool
			Schedule   string
		} `ini:"cron.update_mirrors"`
		RepoHealthCheck struct {
			Enabled    bool
			RunAtStart bool
			Schedule   string
			Timeout    time.Duration
			Args       []string `delim:" "`
		} `ini:"cron.repo_health_check"`
		CheckRepoStats struct {
			Enabled    bool
			RunAtStart bool
			Schedule   string
		} `ini:"cron.check_repo_stats"`
		ArchiveCleanup struct {
			Enabled    bool
			RunAtStart bool
			Schedule   string
			OlderThan  time.Duration
		} `ini:"cron.archive_cleanup"`
		SyncExternalUsers struct {
			Enabled        bool
			RunAtStart     bool
			Schedule       string
			UpdateExisting bool
		} `ini:"cron.sync_external_users"`
		DeletedBranchesCleanup struct {
			Enabled    bool
			RunAtStart bool
			Schedule   string
			OlderThan  time.Duration
		} `ini:"cron.deleted_branches_cleanup"`
	}{
		UpdateMirror: struct {
			Enabled    bool
			RunAtStart bool
			Schedule   string
		}{
			Enabled:    true,
			RunAtStart: false,
			Schedule:   "@every 10m",
		},
		RepoHealthCheck: struct {
			Enabled    bool
			RunAtStart bool
			Schedule   string
			Timeout    time.Duration
			Args       []string `delim:" "`
		}{
			Enabled:    true,
			RunAtStart: false,
			Schedule:   "@every 24h",
			Timeout:    60 * time.Second,
			Args:       []string{},
		},
		CheckRepoStats: struct {
			Enabled    bool
			RunAtStart bool
			Schedule   string
		}{
			Enabled:    true,
			RunAtStart: true,
			Schedule:   "@every 24h",
		},
		ArchiveCleanup: struct {
			Enabled    bool
			RunAtStart bool
			Schedule   string
			OlderThan  time.Duration
		}{
			Enabled:    true,
			RunAtStart: true,
			Schedule:   "@every 24h",
			OlderThan:  24 * time.Hour,
		},
		SyncExternalUsers: struct {
			Enabled        bool
			RunAtStart     bool
			Schedule       string
			UpdateExisting bool
		}{
			Enabled:        true,
			RunAtStart:     false,
			Schedule:       "@every 24h",
			UpdateExisting: true,
		},
		DeletedBranchesCleanup: struct {
			Enabled    bool
			RunAtStart bool
			Schedule   string
			OlderThan  time.Duration
		}{
			Enabled:    true,
			RunAtStart: true,
			Schedule:   "@every 24h",
			OlderThan:  24 * time.Hour,
		},
	}

	// Git settings
	Git = struct {
		Version                  string `ini:"-"`
		DisableDiffHighlight     bool
		MaxGitDiffLines          int
		MaxGitDiffLineCharacters int
		MaxGitDiffFiles          int
		GCArgs                   []string `delim:" "`
		Timeout                  struct {
			Migrate int
			Mirror  int
			Clone   int
			Pull    int
			GC      int `ini:"GC"`
		} `ini:"git.timeout"`
	}{
		DisableDiffHighlight:     false,
		MaxGitDiffLines:          1000,
		MaxGitDiffLineCharacters: 5000,
		MaxGitDiffFiles:          100,
		GCArgs:                   []string{},
		Timeout: struct {
			Migrate int
			Mirror  int
			Clone   int
			Pull    int
			GC      int `ini:"GC"`
		}{
			Migrate: 600,
			Mirror:  300,
			Clone:   300,
			Pull:    300,
			GC:      60,
		},
	}

	// Mirror settings
	Mirror struct {
		DefaultInterval time.Duration
		MinInterval     time.Duration
	}

	// API settings
	API = struct {
		EnableSwagger    bool
		MaxResponseItems int
	}{
		EnableSwagger:    true,
		MaxResponseItems: 50,
	}

	U2F = struct {
		AppID         string
		TrustedFacets []string
	}{}

	// I18n settings
	Langs     []string
	Names     []string
	dateLangs map[string]string

	// Highlight settings are loaded in modules/template/highlight.go

	// Other settings
	ShowFooterBranding         bool
	ShowFooterVersion          bool
	ShowFooterTemplateLoadTime bool

	// Global setting objects
	Cfg               *ini.File
	CustomPath        string // Custom directory path
	CustomConf        string
	CustomPID         string
	ProdMode          bool
	RunUser           string
	IsWindows         bool
	HasRobotsTxt      bool
	InternalToken     string // internal access token
	IterateBufferSize int

	ExternalMarkupParsers []MarkupParser
	// UILocation is the location on the UI, so that we can display the time on UI.
	// Currently only show the default time.Local, it could be added to app.ini after UI is ready
	UILocation = time.Local
)

// DateLang transforms standard language locale name to corresponding value in datetime plugin.
func DateLang(lang string) string {
	name, ok := dateLangs[lang]
	if ok {
		return name
	}
	return "en"
}

func getAppPath() (string, error) {
	var appPath string
	var err error
	if IsWindows && filepath.IsAbs(os.Args[0]) {
		appPath = filepath.Clean(os.Args[0])
	} else {
		appPath, err = exec.LookPath(os.Args[0])
	}

	if err != nil {
		return "", err
	}
	appPath, err = filepath.Abs(appPath)
	if err != nil {
		return "", err
	}
	// Note: we don't use path.Dir here because it does not handle case
	//	which path starts with two "/" in Windows: "//psf/Home/..."
	return strings.Replace(appPath, "\\", "/", -1), err
}

func getWorkPath(appPath string) string {
	workPath := ""
	giteaWorkPath := os.Getenv("GITEA_WORK_DIR")

	if len(giteaWorkPath) > 0 {
		workPath = giteaWorkPath
	} else {
		i := strings.LastIndex(appPath, "/")
		if i == -1 {
			workPath = appPath
		} else {
			workPath = appPath[:i]
		}
	}
	return strings.Replace(workPath, "\\", "/", -1)
}

func init() {
	IsWindows = runtime.GOOS == "windows"
	log.NewLogger(0, "console", `{"level": 0}`)

	var err error
	if AppPath, err = getAppPath(); err != nil {
		log.Fatal(4, "Failed to get app path: %v", err)
	}
	AppWorkPath = getWorkPath(AppPath)
}

func forcePathSeparator(path string) {
	if strings.Contains(path, "\\") {
		log.Fatal(4, "Do not use '\\' or '\\\\' in paths, instead, please use '/' in all places")
	}
}

// IsRunUserMatchCurrentUser returns false if configured run user does not match
// actual user that runs the app. The first return value is the actual user name.
// This check is ignored under Windows since SSH remote login is not the main
// method to login on Windows.
func IsRunUserMatchCurrentUser(runUser string) (string, bool) {
	if IsWindows {
		return "", true
	}

	currentUser := user.CurrentUsername()
	return currentUser, runUser == currentUser
}

func createPIDFile(pidPath string) {
	currentPid := os.Getpid()
	if err := os.MkdirAll(filepath.Dir(pidPath), os.ModePerm); err != nil {
		log.Fatal(4, "Failed to create PID folder: %v", err)
	}

	file, err := os.Create(pidPath)
	if err != nil {
		log.Fatal(4, "Failed to create PID file: %v", err)
	}
	defer file.Close()
	if _, err := file.WriteString(strconv.FormatInt(int64(currentPid), 10)); err != nil {
		log.Fatal(4, "Failed to write PID information: %v", err)
	}
}

// NewContext initializes configuration context.
// NOTE: do not print any log except error.
func NewContext() {
	Cfg = ini.Empty()

	CustomPath = os.Getenv("GITEA_CUSTOM")
	if len(CustomPath) == 0 {
		CustomPath = path.Join(AppWorkPath, "custom")
	} else if !filepath.IsAbs(CustomPath) {
		CustomPath = path.Join(AppWorkPath, CustomPath)
	}

	if len(CustomPID) > 0 {
		createPIDFile(CustomPID)
	}

	if len(CustomConf) == 0 {
		CustomConf = path.Join(CustomPath, "conf/app.ini")
	} else if !filepath.IsAbs(CustomConf) {
		CustomConf = path.Join(CustomPath, CustomConf)
	}

	if com.IsFile(CustomConf) {
		if err := Cfg.Append(CustomConf); err != nil {
			log.Fatal(4, "Failed to load custom conf '%s': %v", CustomConf, err)
		}
	} else {
		log.Warn("Custom config '%s' not found, ignore this if you're running first time", CustomConf)
	}
	Cfg.NameMapper = ini.AllCapsUnderscore

	homeDir, err := com.HomeDir()
	if err != nil {
		log.Fatal(4, "Failed to get home directory: %v", err)
	}
	homeDir = strings.Replace(homeDir, "\\", "/", -1)

	LogLevel = getLogLevel("log", "LEVEL", "Info")
	LogRootPath = Cfg.Section("log").Key("ROOT_PATH").MustString(path.Join(AppWorkPath, "log"))
	forcePathSeparator(LogRootPath)

	sec := Cfg.Section("server")
	AppName = Cfg.Section("").Key("APP_NAME").MustString("Gitea: Git with a cup of tea")

	Protocol = HTTP
	if sec.Key("PROTOCOL").String() == "https" {
		Protocol = HTTPS
		CertFile = sec.Key("CERT_FILE").String()
		KeyFile = sec.Key("KEY_FILE").String()
	} else if sec.Key("PROTOCOL").String() == "fcgi" {
		Protocol = FCGI
	} else if sec.Key("PROTOCOL").String() == "unix" {
		Protocol = UnixSocket
		UnixSocketPermissionRaw := sec.Key("UNIX_SOCKET_PERMISSION").MustString("666")
		UnixSocketPermissionParsed, err := strconv.ParseUint(UnixSocketPermissionRaw, 8, 32)
		if err != nil || UnixSocketPermissionParsed > 0777 {
			log.Fatal(4, "Failed to parse unixSocketPermission: %s", UnixSocketPermissionRaw)
		}
		UnixSocketPermission = uint32(UnixSocketPermissionParsed)
	}
	EnableLetsEncrypt = sec.Key("ENABLE_LETSENCRYPT").MustBool(false)
	LetsEncryptTOS = sec.Key("LETSENCRYPT_ACCEPTTOS").MustBool(false)
	if !LetsEncryptTOS && EnableLetsEncrypt {
		log.Warn("Failed to enable Let's Encrypt due to Let's Encrypt TOS not being accepted")
		EnableLetsEncrypt = false
	}
	LetsEncryptDirectory = sec.Key("LETSENCRYPT_DIRECTORY").MustString("https")
	LetsEncryptEmail = sec.Key("LETSENCRYPT_EMAIL").MustString("")
	Domain = sec.Key("DOMAIN").MustString("localhost")
	HTTPAddr = sec.Key("HTTP_ADDR").MustString("0.0.0.0")
	HTTPPort = sec.Key("HTTP_PORT").MustString("3000")

	defaultAppURL := string(Protocol) + "://" + Domain
	if (Protocol == HTTP && HTTPPort != "80") || (Protocol == HTTPS && HTTPPort != "443") {
		defaultAppURL += ":" + HTTPPort
	}
	AppURL = sec.Key("ROOT_URL").MustString(defaultAppURL)
	AppURL = strings.TrimRight(AppURL, "/") + "/"

	// Check if has app suburl.
	url, err := url.Parse(AppURL)
	if err != nil {
		log.Fatal(4, "Invalid ROOT_URL '%s': %s", AppURL, err)
	}
	// Suburl should start with '/' and end without '/', such as '/{subpath}'.
	// This value is empty if site does not have sub-url.
	AppSubURL = strings.TrimSuffix(url.Path, "/")
	AppSubURLDepth = strings.Count(AppSubURL, "/")
	// Check if Domain differs from AppURL domain than update it to AppURL's domain
	// TODO: Can be replaced with url.Hostname() when minimal GoLang version is 1.8
	urlHostname := strings.SplitN(url.Host, ":", 2)[0]
	if urlHostname != Domain && net.ParseIP(urlHostname) == nil {
		Domain = urlHostname
	}

	var defaultLocalURL string
	switch Protocol {
	case UnixSocket:
		defaultLocalURL = "http://unix/"
	case FCGI:
		defaultLocalURL = AppURL
	default:
		defaultLocalURL = string(Protocol) + "://"
		if HTTPAddr == "0.0.0.0" {
			defaultLocalURL += "localhost"
		} else {
			defaultLocalURL += HTTPAddr
		}
		defaultLocalURL += ":" + HTTPPort + "/"
	}
	LocalURL = sec.Key("LOCAL_ROOT_URL").MustString(defaultLocalURL)
	RedirectOtherPort = sec.Key("REDIRECT_OTHER_PORT").MustBool(false)
	PortToRedirect = sec.Key("PORT_TO_REDIRECT").MustString("80")
	OfflineMode = sec.Key("OFFLINE_MODE").MustBool()
	DisableRouterLog = sec.Key("DISABLE_ROUTER_LOG").MustBool()
	StaticRootPath = sec.Key("STATIC_ROOT_PATH").MustString(AppWorkPath)
	AppDataPath = sec.Key("APP_DATA_PATH").MustString(path.Join(AppWorkPath, "data"))
	EnableGzip = sec.Key("ENABLE_GZIP").MustBool()
	EnablePprof = sec.Key("ENABLE_PPROF").MustBool(false)
	PprofDataPath = sec.Key("PPROF_DATA_PATH").MustString(path.Join(AppWorkPath, "data/tmp/pprof"))
	if !filepath.IsAbs(PprofDataPath) {
		PprofDataPath = filepath.Join(AppWorkPath, PprofDataPath)
	}

	switch sec.Key("LANDING_PAGE").MustString("home") {
	case "explore":
		LandingPageURL = LandingPageExplore
	case "organizations":
		LandingPageURL = LandingPageOrganizations
	default:
		LandingPageURL = LandingPageHome
	}

	if len(SSH.Domain) == 0 {
		SSH.Domain = Domain
	}
	SSH.RootPath = path.Join(homeDir, ".ssh")
	serverCiphers := sec.Key("SSH_SERVER_CIPHERS").Strings(",")
	if len(serverCiphers) > 0 {
		SSH.ServerCiphers = serverCiphers
	}
	serverKeyExchanges := sec.Key("SSH_SERVER_KEY_EXCHANGES").Strings(",")
	if len(serverKeyExchanges) > 0 {
		SSH.ServerKeyExchanges = serverKeyExchanges
	}
	serverMACs := sec.Key("SSH_SERVER_MACS").Strings(",")
	if len(serverMACs) > 0 {
		SSH.ServerMACs = serverMACs
	}
	SSH.KeyTestPath = os.TempDir()
	if err = Cfg.Section("server").MapTo(&SSH); err != nil {
		log.Fatal(4, "Failed to map SSH settings: %v", err)
	}

	SSH.KeygenPath = sec.Key("SSH_KEYGEN_PATH").MustString("ssh-keygen")
	SSH.Port = sec.Key("SSH_PORT").MustInt(22)
	SSH.ListenPort = sec.Key("SSH_LISTEN_PORT").MustInt(SSH.Port)

	// When disable SSH, start builtin server value is ignored.
	if SSH.Disabled {
		SSH.StartBuiltinServer = false
	}

	if !SSH.Disabled && !SSH.StartBuiltinServer {
		if err := os.MkdirAll(SSH.RootPath, 0700); err != nil {
			log.Fatal(4, "Failed to create '%s': %v", SSH.RootPath, err)
		} else if err = os.MkdirAll(SSH.KeyTestPath, 0644); err != nil {
			log.Fatal(4, "Failed to create '%s': %v", SSH.KeyTestPath, err)
		}
	}

	SSH.MinimumKeySizeCheck = sec.Key("MINIMUM_KEY_SIZE_CHECK").MustBool()
	SSH.MinimumKeySizes = map[string]int{}
	minimumKeySizes := Cfg.Section("ssh.minimum_key_sizes").Keys()
	for _, key := range minimumKeySizes {
		if key.MustInt() != -1 {
			SSH.MinimumKeySizes[strings.ToLower(key.Name())] = key.MustInt()
		}
	}
	SSH.AuthorizedKeysBackup = sec.Key("SSH_AUTHORIZED_KEYS_BACKUP").MustBool(true)
	SSH.ExposeAnonymous = sec.Key("SSH_EXPOSE_ANONYMOUS").MustBool(false)

	sec = Cfg.Section("server")
	if err = sec.MapTo(&LFS); err != nil {
		log.Fatal(4, "Failed to map LFS settings: %v", err)
	}
	LFS.ContentPath = sec.Key("LFS_CONTENT_PATH").MustString(filepath.Join(AppDataPath, "lfs"))
	if !filepath.IsAbs(LFS.ContentPath) {
		LFS.ContentPath = filepath.Join(AppWorkPath, LFS.ContentPath)
	}

	LFS.HTTPAuthExpiry = sec.Key("LFS_HTTP_AUTH_EXPIRY").MustDuration(20 * time.Minute)

	if LFS.StartServer {

		if err := os.MkdirAll(LFS.ContentPath, 0700); err != nil {
			log.Fatal(4, "Failed to create '%s': %v", LFS.ContentPath, err)
		}

		LFS.JWTSecretBytes = make([]byte, 32)
		n, err := base64.RawURLEncoding.Decode(LFS.JWTSecretBytes, []byte(LFS.JWTSecretBase64))

		if err != nil || n != 32 {
			LFS.JWTSecretBase64, err = generate.NewLfsJwtSecret()
			if err != nil {
				log.Fatal(4, "Error generating JWT Secret for custom config: %v", err)
				return
			}

			// Save secret
			cfg := ini.Empty()
			if com.IsFile(CustomConf) {
				// Keeps custom settings if there is already something.
				if err := cfg.Append(CustomConf); err != nil {
					log.Error(4, "Failed to load custom conf '%s': %v", CustomConf, err)
				}
			}

			cfg.Section("server").Key("LFS_JWT_SECRET").SetValue(LFS.JWTSecretBase64)

			if err := os.MkdirAll(filepath.Dir(CustomConf), os.ModePerm); err != nil {
				log.Fatal(4, "Failed to create '%s': %v", CustomConf, err)
			}
			if err := cfg.SaveTo(CustomConf); err != nil {
				log.Fatal(4, "Error saving generated JWT Secret to custom config: %v", err)
				return
			}
		}

		//Disable LFS client hooks if installed for the current OS user
		//Needs at least git v2.1.2

		binVersion, err := git.BinVersion()
		if err != nil {
			log.Fatal(4, "Error retrieving git version: %v", err)
		}

		splitVersion := strings.SplitN(binVersion, ".", 4)

		majorVersion, err := strconv.ParseUint(splitVersion[0], 10, 64)
		if err != nil {
			log.Fatal(4, "Error parsing git major version: %v", err)
		}
		minorVersion, err := strconv.ParseUint(splitVersion[1], 10, 64)
		if err != nil {
			log.Fatal(4, "Error parsing git minor version: %v", err)
		}
		revisionVersion, err := strconv.ParseUint(splitVersion[2], 10, 64)
		if err != nil {
			log.Fatal(4, "Error parsing git revision version: %v", err)
		}

		if !((majorVersion > 2) || (majorVersion == 2 && minorVersion > 1) ||
			(majorVersion == 2 && minorVersion == 1 && revisionVersion >= 2)) {

			LFS.StartServer = false
			log.Error(4, "LFS server support needs at least Git v2.1.2")

		} else {

			git.GlobalCommandArgs = append(git.GlobalCommandArgs, "-c", "filter.lfs.required=",
				"-c", "filter.lfs.smudge=", "-c", "filter.lfs.clean=")

		}
	}

	sec = Cfg.Section("security")
	InstallLock = sec.Key("INSTALL_LOCK").MustBool(false)
	SecretKey = sec.Key("SECRET_KEY").MustString("!#@FDEWREWR&*(")
	LogInRememberDays = sec.Key("LOGIN_REMEMBER_DAYS").MustInt(7)
	CookieUserName = sec.Key("COOKIE_USERNAME").MustString("gitea_awesome")
	CookieRememberName = sec.Key("COOKIE_REMEMBER_NAME").MustString("gitea_incredible")
	ReverseProxyAuthUser = sec.Key("REVERSE_PROXY_AUTHENTICATION_USER").MustString("X-WEBAUTH-USER")
	MinPasswordLength = sec.Key("MIN_PASSWORD_LENGTH").MustInt(6)
	ImportLocalPaths = sec.Key("IMPORT_LOCAL_PATHS").MustBool(false)
	DisableGitHooks = sec.Key("DISABLE_GIT_HOOKS").MustBool(false)
	InternalToken = sec.Key("INTERNAL_TOKEN").String()
	if len(InternalToken) == 0 {
		InternalToken, err = generate.NewInternalToken()
		if err != nil {
			log.Fatal(4, "Error generate internal token: %v", err)
		}

		// Save secret
		cfgSave := ini.Empty()
		if com.IsFile(CustomConf) {
			// Keeps custom settings if there is already something.
			if err := cfgSave.Append(CustomConf); err != nil {
				log.Error(4, "Failed to load custom conf '%s': %v", CustomConf, err)
			}
		}

		cfgSave.Section("security").Key("INTERNAL_TOKEN").SetValue(InternalToken)

		if err := os.MkdirAll(filepath.Dir(CustomConf), os.ModePerm); err != nil {
			log.Fatal(4, "Failed to create '%s': %v", CustomConf, err)
		}
		if err := cfgSave.SaveTo(CustomConf); err != nil {
			log.Fatal(4, "Error saving generated JWT Secret to custom config: %v", err)
		}
	}
	IterateBufferSize = Cfg.Section("database").Key("ITERATE_BUFFER_SIZE").MustInt(50)
	LogSQL = Cfg.Section("database").Key("LOG_SQL").MustBool(true)

	sec = Cfg.Section("attachment")
	AttachmentPath = sec.Key("PATH").MustString(path.Join(AppDataPath, "attachments"))
	if !filepath.IsAbs(AttachmentPath) {
		AttachmentPath = path.Join(AppWorkPath, AttachmentPath)
	}
	AttachmentAllowedTypes = strings.Replace(sec.Key("ALLOWED_TYPES").MustString("image/jpeg,image/png,application/zip,application/gzip"), "|", ",", -1)
	AttachmentMaxSize = sec.Key("MAX_SIZE").MustInt64(4)
	AttachmentMaxFiles = sec.Key("MAX_FILES").MustInt(5)
	AttachmentEnabled = sec.Key("ENABLED").MustBool(true)

	TimeFormatKey := Cfg.Section("time").Key("FORMAT").MustString("RFC1123")
	TimeFormat = map[string]string{
		"ANSIC":       time.ANSIC,
		"UnixDate":    time.UnixDate,
		"RubyDate":    time.RubyDate,
		"RFC822":      time.RFC822,
		"RFC822Z":     time.RFC822Z,
		"RFC850":      time.RFC850,
		"RFC1123":     time.RFC1123,
		"RFC1123Z":    time.RFC1123Z,
		"RFC3339":     time.RFC3339,
		"RFC3339Nano": time.RFC3339Nano,
		"Kitchen":     time.Kitchen,
		"Stamp":       time.Stamp,
		"StampMilli":  time.StampMilli,
		"StampMicro":  time.StampMicro,
		"StampNano":   time.StampNano,
	}[TimeFormatKey]
	// When the TimeFormatKey does not exist in the previous map e.g.'2006-01-02 15:04:05'
	if len(TimeFormat) == 0 {
		TimeFormat = TimeFormatKey
		TestTimeFormat, _ := time.Parse(TimeFormat, TimeFormat)
		if TestTimeFormat.Format(time.RFC3339) != "2006-01-02T15:04:05Z" {
			log.Fatal(4, "Can't create time properly, please check your time format has 2006, 01, 02, 15, 04 and 05")
		}
		log.Trace("Custom TimeFormat: %s", TimeFormat)
	}

	RunUser = Cfg.Section("").Key("RUN_USER").MustString(user.CurrentUsername())
	// Does not check run user when the install lock is off.
	if InstallLock {
		currentUser, match := IsRunUserMatchCurrentUser(RunUser)
		if !match {
			log.Fatal(4, "Expect user '%s' but current user is: %s", RunUser, currentUser)
		}
	}

	SSH.BuiltinServerUser = Cfg.Section("server").Key("BUILTIN_SSH_SERVER_USER").MustString(RunUser)

	// Determine and create root git repository path.
	sec = Cfg.Section("repository")
	Repository.DisableHTTPGit = sec.Key("DISABLE_HTTP_GIT").MustBool()
	Repository.UseCompatSSHURI = sec.Key("USE_COMPAT_SSH_URI").MustBool()
	Repository.MaxCreationLimit = sec.Key("MAX_CREATION_LIMIT").MustInt(-1)
	RepoRootPath = sec.Key("ROOT").MustString(path.Join(homeDir, "gitea-repositories"))
	forcePathSeparator(RepoRootPath)
	if !filepath.IsAbs(RepoRootPath) {
		RepoRootPath = filepath.Join(AppWorkPath, RepoRootPath)
	} else {
		RepoRootPath = filepath.Clean(RepoRootPath)
	}
	ScriptType = sec.Key("SCRIPT_TYPE").MustString("bash")
	if err = Cfg.Section("repository").MapTo(&Repository); err != nil {
		log.Fatal(4, "Failed to map Repository settings: %v", err)
	} else if err = Cfg.Section("repository.editor").MapTo(&Repository.Editor); err != nil {
		log.Fatal(4, "Failed to map Repository.Editor settings: %v", err)
	} else if err = Cfg.Section("repository.upload").MapTo(&Repository.Upload); err != nil {
		log.Fatal(4, "Failed to map Repository.Upload settings: %v", err)
	} else if err = Cfg.Section("repository.local").MapTo(&Repository.Local); err != nil {
		log.Fatal(4, "Failed to map Repository.Local settings: %v", err)
	} else if err = Cfg.Section("repository.pull-request").MapTo(&Repository.PullRequest); err != nil {
		log.Fatal(4, "Failed to map Repository.PullRequest settings: %v", err)
	}

	if !filepath.IsAbs(Repository.Upload.TempPath) {
		Repository.Upload.TempPath = path.Join(AppWorkPath, Repository.Upload.TempPath)
	}

	sec = Cfg.Section("picture")
	AvatarUploadPath = sec.Key("AVATAR_UPLOAD_PATH").MustString(path.Join(AppDataPath, "avatars"))
	forcePathSeparator(AvatarUploadPath)
	if !filepath.IsAbs(AvatarUploadPath) {
		AvatarUploadPath = path.Join(AppWorkPath, AvatarUploadPath)
	}
	AvatarMaxWidth = sec.Key("AVATAR_MAX_WIDTH").MustInt(4096)
	AvatarMaxHeight = sec.Key("AVATAR_MAX_HEIGHT").MustInt(3072)
	switch source := sec.Key("GRAVATAR_SOURCE").MustString("gravatar"); source {
	case "duoshuo":
		GravatarSource = "http://gravatar.duoshuo.com/avatar/"
	case "gravatar":
		GravatarSource = "https://secure.gravatar.com/avatar/"
	case "libravatar":
		GravatarSource = "https://seccdn.libravatar.org/avatar/"
	default:
		GravatarSource = source
	}
	DisableGravatar = sec.Key("DISABLE_GRAVATAR").MustBool()
	EnableFederatedAvatar = sec.Key("ENABLE_FEDERATED_AVATAR").MustBool(!InstallLock)
	if OfflineMode {
		DisableGravatar = true
		EnableFederatedAvatar = false
	}
	if DisableGravatar {
		EnableFederatedAvatar = false
	}
	if EnableFederatedAvatar || !DisableGravatar {
		GravatarSourceURL, err = url.Parse(GravatarSource)
		if err != nil {
			log.Fatal(4, "Failed to parse Gravatar URL(%s): %v",
				GravatarSource, err)
		}
	}

	if EnableFederatedAvatar {
		LibravatarService = libravatar.New()
		if GravatarSourceURL.Scheme == "https" {
			LibravatarService.SetUseHTTPS(true)
			LibravatarService.SetSecureFallbackHost(GravatarSourceURL.Host)
		} else {
			LibravatarService.SetUseHTTPS(false)
			LibravatarService.SetFallbackHost(GravatarSourceURL.Host)
		}
	}

	if err = Cfg.Section("ui").MapTo(&UI); err != nil {
		log.Fatal(4, "Failed to map UI settings: %v", err)
	} else if err = Cfg.Section("markdown").MapTo(&Markdown); err != nil {
		log.Fatal(4, "Failed to map Markdown settings: %v", err)
	} else if err = Cfg.Section("admin").MapTo(&Admin); err != nil {
		log.Fatal(4, "Fail to map Admin settings: %v", err)
	} else if err = Cfg.Section("cron").MapTo(&Cron); err != nil {
		log.Fatal(4, "Failed to map Cron settings: %v", err)
	} else if err = Cfg.Section("git").MapTo(&Git); err != nil {
		log.Fatal(4, "Failed to map Git settings: %v", err)
	} else if err = Cfg.Section("api").MapTo(&API); err != nil {
		log.Fatal(4, "Failed to map API settings: %v", err)
	}

	sec = Cfg.Section("mirror")
	Mirror.MinInterval = sec.Key("MIN_INTERVAL").MustDuration(10 * time.Minute)
	Mirror.DefaultInterval = sec.Key("DEFAULT_INTERVAL").MustDuration(8 * time.Hour)
	if Mirror.MinInterval.Minutes() < 1 {
		log.Warn("Mirror.MinInterval is too low")
		Mirror.MinInterval = 1 * time.Minute
	}
	if Mirror.DefaultInterval < Mirror.MinInterval {
		log.Warn("Mirror.DefaultInterval is less than Mirror.MinInterval")
		Mirror.DefaultInterval = time.Hour * 8
	}

	Langs = Cfg.Section("i18n").Key("LANGS").Strings(",")
	if len(Langs) == 0 {
		Langs = defaultLangs
	}
	Names = Cfg.Section("i18n").Key("NAMES").Strings(",")
	if len(Names) == 0 {
		Names = defaultLangNames
	}
	dateLangs = Cfg.Section("i18n.datelang").KeysHash()

	ShowFooterBranding = Cfg.Section("other").Key("SHOW_FOOTER_BRANDING").MustBool(false)
	ShowFooterVersion = Cfg.Section("other").Key("SHOW_FOOTER_VERSION").MustBool(true)
	ShowFooterTemplateLoadTime = Cfg.Section("other").Key("SHOW_FOOTER_TEMPLATE_LOAD_TIME").MustBool(true)

	UI.ShowUserEmail = Cfg.Section("ui").Key("SHOW_USER_EMAIL").MustBool(true)

	HasRobotsTxt = com.IsFile(path.Join(CustomPath, "robots.txt"))

	extensionReg := regexp.MustCompile(`\.\w`)
	for _, sec := range Cfg.Section("markup").ChildSections() {
		name := strings.TrimPrefix(sec.Name(), "markup.")
		if name == "" {
			log.Warn("name is empty, markup " + sec.Name() + "ignored")
			continue
		}

		extensions := sec.Key("FILE_EXTENSIONS").Strings(",")
		var exts = make([]string, 0, len(extensions))
		for _, extension := range extensions {
			if !extensionReg.MatchString(extension) {
				log.Warn(sec.Name() + " file extension " + extension + " is invalid. Extension ignored")
			} else {
				exts = append(exts, extension)
			}
		}

		if len(exts) == 0 {
			log.Warn(sec.Name() + " file extension is empty, markup " + name + " ignored")
			continue
		}

		command := sec.Key("RENDER_COMMAND").MustString("")
		if command == "" {
			log.Warn(" RENDER_COMMAND is empty, markup " + name + " ignored")
			continue
		}

		ExternalMarkupParsers = append(ExternalMarkupParsers, MarkupParser{
			Enabled:        sec.Key("ENABLED").MustBool(false),
			MarkupName:     name,
			FileExtensions: exts,
			Command:        command,
			IsInputFile:    sec.Key("IS_INPUT_FILE").MustBool(false),
		})
	}
	sec = Cfg.Section("U2F")
	U2F.TrustedFacets, _ = shellquote.Split(sec.Key("TRUSTED_FACETS").MustString(strings.TrimRight(AppURL, "/")))
	U2F.AppID = sec.Key("APP_ID").MustString(strings.TrimRight(AppURL, "/"))
}

// Service settings
var Service struct {
	ActiveCodeLives                         int
	ResetPwdCodeLives                       int
	RegisterEmailConfirm                    bool
	DisableRegistration                     bool
	AllowOnlyExternalRegistration           bool
	ShowRegistrationButton                  bool
	RequireSignInView                       bool
	EnableNotifyMail                        bool
	EnableReverseProxyAuth                  bool
	EnableReverseProxyAutoRegister          bool
	EnableCaptcha                           bool
	CaptchaType                             string
	RecaptchaSecret                         string
	RecaptchaSitekey                        string
	DefaultKeepEmailPrivate                 bool
	DefaultAllowCreateOrganization          bool
	EnableTimetracking                      bool
	DefaultEnableTimetracking               bool
	DefaultEnableDependencies               bool
	DefaultAllowOnlyContributorsToTrackTime bool
	NoReplyAddress                          string
	EnableUserHeatmap                       bool

	// OpenID settings
	EnableOpenIDSignIn bool
	EnableOpenIDSignUp bool
	OpenIDWhitelist    []*regexp.Regexp
	OpenIDBlacklist    []*regexp.Regexp
}

func newService() {
	sec := Cfg.Section("service")
	Service.ActiveCodeLives = sec.Key("ACTIVE_CODE_LIVE_MINUTES").MustInt(180)
	Service.ResetPwdCodeLives = sec.Key("RESET_PASSWD_CODE_LIVE_MINUTES").MustInt(180)
	Service.DisableRegistration = sec.Key("DISABLE_REGISTRATION").MustBool()
	Service.AllowOnlyExternalRegistration = sec.Key("ALLOW_ONLY_EXTERNAL_REGISTRATION").MustBool()
	Service.ShowRegistrationButton = sec.Key("SHOW_REGISTRATION_BUTTON").MustBool(!(Service.DisableRegistration || Service.AllowOnlyExternalRegistration))
	Service.RequireSignInView = sec.Key("REQUIRE_SIGNIN_VIEW").MustBool()
	Service.EnableReverseProxyAuth = sec.Key("ENABLE_REVERSE_PROXY_AUTHENTICATION").MustBool()
	Service.EnableReverseProxyAutoRegister = sec.Key("ENABLE_REVERSE_PROXY_AUTO_REGISTRATION").MustBool()
	Service.EnableCaptcha = sec.Key("ENABLE_CAPTCHA").MustBool(false)
	Service.CaptchaType = sec.Key("CAPTCHA_TYPE").MustString(ImageCaptcha)
	Service.RecaptchaSecret = sec.Key("RECAPTCHA_SECRET").MustString("")
	Service.RecaptchaSitekey = sec.Key("RECAPTCHA_SITEKEY").MustString("")
	Service.DefaultKeepEmailPrivate = sec.Key("DEFAULT_KEEP_EMAIL_PRIVATE").MustBool()
	Service.DefaultAllowCreateOrganization = sec.Key("DEFAULT_ALLOW_CREATE_ORGANIZATION").MustBool(true)
	Service.EnableTimetracking = sec.Key("ENABLE_TIMETRACKING").MustBool(true)
	if Service.EnableTimetracking {
		Service.DefaultEnableTimetracking = sec.Key("DEFAULT_ENABLE_TIMETRACKING").MustBool(true)
	}
	Service.DefaultEnableDependencies = sec.Key("DEFAULT_ENABLE_DEPENDENCIES").MustBool(true)
	Service.DefaultAllowOnlyContributorsToTrackTime = sec.Key("DEFAULT_ALLOW_ONLY_CONTRIBUTORS_TO_TRACK_TIME").MustBool(true)
	Service.NoReplyAddress = sec.Key("NO_REPLY_ADDRESS").MustString("noreply.example.org")
	Service.EnableUserHeatmap = sec.Key("ENABLE_USER_HEATMAP").MustBool(true)

	sec = Cfg.Section("openid")
	Service.EnableOpenIDSignIn = sec.Key("ENABLE_OPENID_SIGNIN").MustBool(!InstallLock)
	Service.EnableOpenIDSignUp = sec.Key("ENABLE_OPENID_SIGNUP").MustBool(!Service.DisableRegistration && Service.EnableOpenIDSignIn)
	pats := sec.Key("WHITELISTED_URIS").Strings(" ")
	if len(pats) != 0 {
		Service.OpenIDWhitelist = make([]*regexp.Regexp, len(pats))
		for i, p := range pats {
			Service.OpenIDWhitelist[i] = regexp.MustCompilePOSIX(p)
		}
	}
	pats = sec.Key("BLACKLISTED_URIS").Strings(" ")
	if len(pats) != 0 {
		Service.OpenIDBlacklist = make([]*regexp.Regexp, len(pats))
		for i, p := range pats {
			Service.OpenIDBlacklist[i] = regexp.MustCompilePOSIX(p)
		}
	}
}

var logLevels = map[string]string{
	"Trace":    "0",
	"Debug":    "1",
	"Info":     "2",
	"Warn":     "3",
	"Error":    "4",
	"Critical": "5",
}

func getLogLevel(section string, key string, defaultValue string) string {
	validLevels := []string{"Trace", "Debug", "Info", "Warn", "Error", "Critical"}
	return Cfg.Section(section).Key(key).In(defaultValue, validLevels)
}

func newLogService() {
	log.Info("Gitea v%s%s", AppVer, AppBuiltWith)

	LogModes = strings.Split(Cfg.Section("log").Key("MODE").MustString("console"), ",")
	LogConfigs = make([]string, len(LogModes))

	useConsole := false
	for i := 0; i < len(LogModes); i++ {
		LogModes[i] = strings.TrimSpace(LogModes[i])
		if LogModes[i] == "console" {
			useConsole = true
		}
	}

	if !useConsole {
		log.DelLogger("console")
	}

	for i, mode := range LogModes {
		sec, err := Cfg.GetSection("log." + mode)
		if err != nil {
			sec, _ = Cfg.NewSection("log." + mode)
		}

		// Log level.
		levelName := getLogLevel("log."+mode, "LEVEL", LogLevel)
		level, ok := logLevels[levelName]
		if !ok {
			log.Fatal(4, "Unknown log level: %s", levelName)
		}

		// Generate log configuration.
		switch mode {
		case "console":
			LogConfigs[i] = fmt.Sprintf(`{"level":%s}`, level)
		case "file":
			logPath := sec.Key("FILE_NAME").MustString(path.Join(LogRootPath, "gitea.log"))
			if err = os.MkdirAll(path.Dir(logPath), os.ModePerm); err != nil {
				panic(err.Error())
			}

			LogConfigs[i] = fmt.Sprintf(
				`{"level":%s,"filename":"%s","rotate":%v,"maxlines":%d,"maxsize":%d,"daily":%v,"maxdays":%d}`, level,
				logPath,
				sec.Key("LOG_ROTATE").MustBool(true),
				sec.Key("MAX_LINES").MustInt(1000000),
				1<<uint(sec.Key("MAX_SIZE_SHIFT").MustInt(28)),
				sec.Key("DAILY_ROTATE").MustBool(true),
				sec.Key("MAX_DAYS").MustInt(7))
		case "conn":
			LogConfigs[i] = fmt.Sprintf(`{"level":%s,"reconnectOnMsg":%v,"reconnect":%v,"net":"%s","addr":"%s"}`, level,
				sec.Key("RECONNECT_ON_MSG").MustBool(),
				sec.Key("RECONNECT").MustBool(),
				sec.Key("PROTOCOL").In("tcp", []string{"tcp", "unix", "udp"}),
				sec.Key("ADDR").MustString(":7020"))
		case "smtp":
			LogConfigs[i] = fmt.Sprintf(`{"level":%s,"username":"%s","password":"%s","host":"%s","sendTos":["%s"],"subject":"%s"}`, level,
				sec.Key("USER").MustString("example@example.com"),
				sec.Key("PASSWD").MustString("******"),
				sec.Key("HOST").MustString("127.0.0.1:25"),
				strings.Replace(sec.Key("RECEIVERS").MustString("example@example.com"), ",", "\",\"", -1),
				sec.Key("SUBJECT").MustString("Diagnostic message from serve"))
		case "database":
			LogConfigs[i] = fmt.Sprintf(`{"level":%s,"driver":"%s","conn":"%s"}`, level,
				sec.Key("DRIVER").String(),
				sec.Key("CONN").String())
		}

		log.NewLogger(Cfg.Section("log").Key("BUFFER_LEN").MustInt64(10000), mode, LogConfigs[i])
		log.Info("Log Mode: %s(%s)", strings.Title(mode), levelName)
	}
}

// NewXORMLogService initializes xorm logger service
func NewXORMLogService(disableConsole bool) {
	logModes := strings.Split(Cfg.Section("log").Key("MODE").MustString("console"), ",")
	var logConfigs string
	for _, mode := range logModes {
		mode = strings.TrimSpace(mode)

		if disableConsole && mode == "console" {
			continue
		}

		sec, err := Cfg.GetSection("log." + mode)
		if err != nil {
			sec, _ = Cfg.NewSection("log." + mode)
		}

		// Log level.
		levelName := getLogLevel("log."+mode, "LEVEL", LogLevel)
		level, ok := logLevels[levelName]
		if !ok {
			log.Fatal(4, "Unknown log level: %s", levelName)
		}

		// Generate log configuration.
		switch mode {
		case "console":
			logConfigs = fmt.Sprintf(`{"level":%s}`, level)
		case "file":
			logPath := sec.Key("FILE_NAME").MustString(path.Join(LogRootPath, "xorm.log"))
			if err = os.MkdirAll(path.Dir(logPath), os.ModePerm); err != nil {
				panic(err.Error())
			}
			logPath = path.Join(filepath.Dir(logPath), "xorm.log")

			logConfigs = fmt.Sprintf(
				`{"level":%s,"filename":"%s","rotate":%v,"maxlines":%d,"maxsize":%d,"daily":%v,"maxdays":%d}`, level,
				logPath,
				sec.Key("LOG_ROTATE").MustBool(true),
				sec.Key("MAX_LINES").MustInt(1000000),
				1<<uint(sec.Key("MAX_SIZE_SHIFT").MustInt(28)),
				sec.Key("DAILY_ROTATE").MustBool(true),
				sec.Key("MAX_DAYS").MustInt(7))
		case "conn":
			logConfigs = fmt.Sprintf(`{"level":%s,"reconnectOnMsg":%v,"reconnect":%v,"net":"%s","addr":"%s"}`, level,
				sec.Key("RECONNECT_ON_MSG").MustBool(),
				sec.Key("RECONNECT").MustBool(),
				sec.Key("PROTOCOL").In("tcp", []string{"tcp", "unix", "udp"}),
				sec.Key("ADDR").MustString(":7020"))
		case "smtp":
			logConfigs = fmt.Sprintf(`{"level":%s,"username":"%s","password":"%s","host":"%s","sendTos":"%s","subject":"%s"}`, level,
				sec.Key("USER").MustString("example@example.com"),
				sec.Key("PASSWD").MustString("******"),
				sec.Key("HOST").MustString("127.0.0.1:25"),
				sec.Key("RECEIVERS").MustString("[]"),
				sec.Key("SUBJECT").MustString("Diagnostic message from serve"))
		case "database":
			logConfigs = fmt.Sprintf(`{"level":%s,"driver":"%s","conn":"%s"}`, level,
				sec.Key("DRIVER").String(),
				sec.Key("CONN").String())
		}

		log.NewXORMLogger(Cfg.Section("log").Key("BUFFER_LEN").MustInt64(10000), mode, logConfigs)
		if !disableConsole {
			log.Info("XORM Log Mode: %s(%s)", strings.Title(mode), levelName)
		}

		var lvl core.LogLevel
		switch levelName {
		case "Trace", "Debug":
			lvl = core.LOG_DEBUG
		case "Info":
			lvl = core.LOG_INFO
		case "Warn":
			lvl = core.LOG_WARNING
		case "Error", "Critical":
			lvl = core.LOG_ERR
		}
		log.XORMLogger.SetLevel(lvl)
	}

	if len(logConfigs) == 0 {
		log.DiscardXORMLogger()
	}
}

// Cache represents cache settings
type Cache struct {
	Adapter  string
	Interval int
	Conn     string
	TTL      time.Duration
}

var (
	// CacheService the global cache
	CacheService *Cache
)

func newCacheService() {
	sec := Cfg.Section("cache")
	CacheService = &Cache{
		Adapter: sec.Key("ADAPTER").In("memory", []string{"memory", "redis", "memcache"}),
	}
	switch CacheService.Adapter {
	case "memory":
		CacheService.Interval = sec.Key("INTERVAL").MustInt(60)
	case "redis", "memcache":
		CacheService.Conn = strings.Trim(sec.Key("HOST").String(), "\" ")
	default:
		log.Fatal(4, "Unknown cache adapter: %s", CacheService.Adapter)
	}
	CacheService.TTL = sec.Key("ITEM_TTL").MustDuration(16 * time.Hour)

	log.Info("Cache Service Enabled")
}

func newSessionService() {
	SessionConfig.Provider = Cfg.Section("session").Key("PROVIDER").In("memory",
		[]string{"memory", "file", "redis", "mysql"})
	SessionConfig.ProviderConfig = strings.Trim(Cfg.Section("session").Key("PROVIDER_CONFIG").MustString(path.Join(AppDataPath, "sessions")), "\" ")
	if SessionConfig.Provider == "file" && !filepath.IsAbs(SessionConfig.ProviderConfig) {
		SessionConfig.ProviderConfig = path.Join(AppWorkPath, SessionConfig.ProviderConfig)
	}
	SessionConfig.CookieName = Cfg.Section("session").Key("COOKIE_NAME").MustString("i_like_gitea")
	SessionConfig.CookiePath = AppSubURL
	SessionConfig.Secure = Cfg.Section("session").Key("COOKIE_SECURE").MustBool(false)
	SessionConfig.Gclifetime = Cfg.Section("session").Key("GC_INTERVAL_TIME").MustInt64(86400)
	SessionConfig.Maxlifetime = Cfg.Section("session").Key("SESSION_LIFE_TIME").MustInt64(86400)

	log.Info("Session Service Enabled")
}

// Mailer represents mail service.
type Mailer struct {
	// Mailer
	QueueLength     int
	Name            string
	From            string
	FromName        string
	FromEmail       string
	SendAsPlainText bool

	// SMTP sender
	Host              string
	User, Passwd      string
	DisableHelo       bool
	HeloHostname      string
	SkipVerify        bool
	UseCertificate    bool
	CertFile, KeyFile string

	// Sendmail sender
	UseSendmail  bool
	SendmailPath string
	SendmailArgs []string
}

var (
	// MailService the global mailer
	MailService *Mailer
)

func newMailService() {
	sec := Cfg.Section("mailer")
	// Check mailer setting.
	if !sec.Key("ENABLED").MustBool() {
		return
	}

	MailService = &Mailer{
		QueueLength:     sec.Key("SEND_BUFFER_LEN").MustInt(100),
		Name:            sec.Key("NAME").MustString(AppName),
		SendAsPlainText: sec.Key("SEND_AS_PLAIN_TEXT").MustBool(false),

		Host:           sec.Key("HOST").String(),
		User:           sec.Key("USER").String(),
		Passwd:         sec.Key("PASSWD").String(),
		DisableHelo:    sec.Key("DISABLE_HELO").MustBool(),
		HeloHostname:   sec.Key("HELO_HOSTNAME").String(),
		SkipVerify:     sec.Key("SKIP_VERIFY").MustBool(),
		UseCertificate: sec.Key("USE_CERTIFICATE").MustBool(),
		CertFile:       sec.Key("CERT_FILE").String(),
		KeyFile:        sec.Key("KEY_FILE").String(),

		UseSendmail:  sec.Key("USE_SENDMAIL").MustBool(),
		SendmailPath: sec.Key("SENDMAIL_PATH").MustString("sendmail"),
	}
	MailService.From = sec.Key("FROM").MustString(MailService.User)

	if sec.HasKey("ENABLE_HTML_ALTERNATIVE") {
		log.Warn("ENABLE_HTML_ALTERNATIVE is deprecated, use SEND_AS_PLAIN_TEXT")
		MailService.SendAsPlainText = !sec.Key("ENABLE_HTML_ALTERNATIVE").MustBool(false)
	}

	parsed, err := mail.ParseAddress(MailService.From)
	if err != nil {
		log.Fatal(4, "Invalid mailer.FROM (%s): %v", MailService.From, err)
	}
	MailService.FromName = parsed.Name
	MailService.FromEmail = parsed.Address

	if MailService.UseSendmail {
		MailService.SendmailArgs, err = shellquote.Split(sec.Key("SENDMAIL_ARGS").String())
		if err != nil {
			log.Error(4, "Failed to parse Sendmail args: %v", CustomConf, err)
		}
	}

	log.Info("Mail Service Enabled")
}

func newRegisterMailService() {
	if !Cfg.Section("service").Key("REGISTER_EMAIL_CONFIRM").MustBool() {
		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.Section("service").Key("ENABLE_NOTIFY_MAIL").MustBool() {
		return
	} else if MailService == nil {
		log.Warn("Notify Mail Service: Mail Service is not enabled")
		return
	}
	Service.EnableNotifyMail = true
	log.Info("Notify Mail Service Enabled")
}

func newWebhookService() {
	sec := Cfg.Section("webhook")
	Webhook.QueueLength = sec.Key("QUEUE_LENGTH").MustInt(1000)
	Webhook.DeliverTimeout = sec.Key("DELIVER_TIMEOUT").MustInt(5)
	Webhook.SkipTLSVerify = sec.Key("SKIP_TLS_VERIFY").MustBool()
	Webhook.Types = []string{"gitea", "gogs", "slack", "discord", "dingtalk"}
	Webhook.PagingNum = sec.Key("PAGING_NUM").MustInt(10)
}

// NewServices initializes the services
func NewServices() {
	newService()
	newLogService()
	NewXORMLogService(false)
	newCacheService()
	newSessionService()
	newMailService()
	newRegisterMailService()
	newNotifyMailService()
	newWebhookService()
}