Add support for federated avatars (#3320)

* Add support for federated avatars

Fixes #3105

Removes avatar fetching duplication code
Adds an "Enable Federated Avatar" checkbox in user settings
(defaults to unchecked)

Moves avatar settings all in the same form, making
local and remote avatars mutually exclusive

Renames UploadAvatarForm to AvatarForm
as it's not anymore only for uploading

* Run gofmt on all modified files

* Move Avatar form in its own page

* Add go-libravatar dependency to vendor/ dir

Hopefully helps with accepting the contribution.
See also #3214

* Revert "Add go-libravatar dependency to vendor/ dir"

This reverts commit a8cb93ae640bbb90f7d25012fc257bda9fae9b82.

* Make federated avatar setting a global configuration

Removes the per-user setting

* Move avatar handling back to base tool, disable federated avatar in offline mode

* Format, handle error

* Properly set fallback host

* Use unsupported github.com mirror for importing go-libravatar

* Remove comment showing life exists outside of github.com

... pity, but contribution would not be accepted otherwise

* Use Combo for Get and Post methods over /avatar

* FEDERATED_AVATAR -> ENABLE_FEDERATED_AVATAR

* Fix persistance of federated avatar lookup checkbox at install time

* Federated Avatars -> Enable Federated Avatars

* Use len(string) == 0 instead of string == ""

* Move import line where it belong

See
https://github.com/Unknwon/go-code-convention/blob/master/en-US/import_packages.md

Pity the import url is still the unofficial one, but oh well...

* Save a line (and waste much more expensive time)

* Remove redundant parens

* Remove an empty line

* Remove empty lines

* Reorder lines to make diff smaller

* Remove another newline

Unknwon review got me start a fight against newlines

* Move DISABLE_GRAVATAR and ENABLE_FEDERATED_AVATAR after OFFLINE_MODE

On re-reading the diff I figured what Unknwon meant here:
https://github.com/gogits/gogs/pull/3320/files#r73741106

* Remove newlines that weren't there before my intervention

cmd/web.go

@@ -226,7 +226,8 @@ func runWeb(ctx *cli.Context) error {
 	m.Group("/user/settings", func() {
 		m.Get("", user.Settings)
 		m.Post("", bindIgnErr(auth.UpdateProfileForm{}), user.SettingsPost)
-		m.Post("/avatar", binding.MultipartForm(auth.UploadAvatarForm{}), user.SettingsAvatar)
+		m.Combo("/avatar").Get(user.SettingsAvatar).
+			Post(binding.MultipartForm(auth.AvatarForm{}), user.SettingsAvatarPost)
 		m.Post("/avatar/delete", user.SettingsDeleteAvatar)
 		m.Combo("/email").Get(user.SettingsEmails).
 			Post(bindIgnErr(auth.AddEmailForm{}), user.SettingsEmailPost)
@@ -375,7 +376,7 @@ func runWeb(ctx *cli.Context) error {
 			m.Group("/settings", func() {
 				m.Combo("").Get(org.Settings).
 					Post(bindIgnErr(auth.UpdateOrgSettingForm{}), org.SettingsPost)
-				m.Post("/avatar", binding.MultipartForm(auth.UploadAvatarForm{}), org.SettingsAvatar)
+				m.Post("/avatar", binding.MultipartForm(auth.AvatarForm{}), org.SettingsAvatar)
 				m.Post("/avatar/delete", org.SettingsDeleteAvatar)
 
 				m.Group("/hooks", func() {

conf/app.ini

@@ -230,6 +230,9 @@ AVATAR_UPLOAD_PATH = data/avatars
 ; or a custom avatar source, like: http://cn.gravatar.com/avatar/
 GRAVATAR_SOURCE = gravatar
 DISABLE_GRAVATAR = false
+; Federated avatar lookup uses DNS to discover avatar associated
+; with emails, see http://www.libravatar.org
+ENABLE_FEDERATED_AVATAR = false
 
 [attachment]
 ; Whether attachments are enabled. Defaults to `true`

conf/locale/locale_en-US.ini

@@ -96,6 +96,7 @@ offline_mode = Enable Offline Mode
 offline_mode_popup = Disable CDN even in production mode, all resource files will be served locally.
 disable_gravatar = Disable Gravatar Service
 disable_gravatar_popup = Disable Gravatar and custom sources, all avatars are uploaded by users or default.
+federated_avatar_lookup = Enable Federated Avatars Lookup
 disable_registration = Disable Self-registration
 disable_registration_popup = Disable user self-registration, only admin can create accounts.
 enable_captcha = Enable Captcha
@@ -239,6 +240,7 @@ form.name_pattern_not_allowed = Username pattern '%s' is not allowed.
 [settings]
 profile = Profile
 password = Password
+avatar = Avatar
 ssh_keys = SSH Keys
 social = Social Accounts
 applications = Applications
@@ -259,7 +261,9 @@ change_username_prompt = This change will affect the way how links relate to you
 continue = Continue
 cancel = Cancel
 
-enable_custom_avatar = Enable Custom Avatar
+lookup_avatar_by_mail = Lookup Avatar by mail
+federated_avatar_lookup = Federated Avatar Lookup
+enable_custom_avatar = Use Custom Avatar
 choose_new_avatar = Choose new avatar
 update_avatar = Update Avatar Setting
 delete_current_avatar = Delete Current Avatar
@@ -1044,6 +1048,7 @@ config.cookie_life_time = Cookie Life Time
 config.picture_config = Picture Configuration
 config.picture_service = Picture Service
 config.disable_gravatar = Disable Gravatar
+config.enable_federated_avatar = Enable Federated Avatars
 config.log_config = Log Configuration
 config.log_mode = Log Mode
 

models/user.go

@@ -254,7 +254,7 @@ func (u *User) RelAvatarLink() string {
 
 		return setting.AppSubUrl + "/avatars/" + com.ToStr(u.ID)
 	}
-	return setting.GravatarSource + u.Avatar
+	return base.AvatarLink(u.AvatarEmail)
 }
 
 // AvatarLink returns user avatar absolute link.

modules/auth/user_form.go

@@ -38,6 +38,7 @@ type InstallForm struct {
 
 	OfflineMode           bool
 	DisableGravatar       bool
+	EnableFederatedAvatar bool
 	DisableRegistration   bool
 	EnableCaptcha         bool
 	RequireSignInView     bool
@@ -93,19 +94,25 @@ type UpdateProfileForm struct {
 	Email    string `binding:"Required;Email;MaxSize(254)"`
 	Website  string `binding:"Url;MaxSize(100)"`
 	Location string `binding:"MaxSize(50)"`
-	Gravatar string `binding:"OmitEmpty;Email;MaxSize(254)"`
 }
 
 func (f *UpdateProfileForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
 	return validate(errs, ctx.Data, f, ctx.Locale)
 }
 
-type UploadAvatarForm struct {
-	Enable bool
+const (
+	AVATAR_LOCAL  string = "local"
+	AVATAR_BYMAIL string = "bymail"
+)
+
+type AvatarForm struct {
+	Source      string
 	Avatar      *multipart.FileHeader
+	Gravatar    string `binding:"OmitEmpty;Email;MaxSize(254)"`
+	Federavatar bool
 }
 
-func (f *UploadAvatarForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
+func (f *AvatarForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
 	return validate(errs, ctx.Data, f, ctx.Locale)
 }
 

modules/base/tool.go

@@ -205,12 +205,26 @@ func HashEmail(email string) string {
 }
 
 // AvatarLink returns avatar link by given email.
-func AvatarLink(email string) string {
-	if setting.DisableGravatar || setting.OfflineMode {
-		return setting.AppSubUrl + "/img/avatar_default.png"
+func AvatarLink(email string) (url string) {
+
+	if !setting.OfflineMode {
+		if setting.EnableFederatedAvatar && setting.LibravatarService != nil {
+			var err error
+			url, err = setting.LibravatarService.FromEmail(email)
+			if err != nil {
+				log.Error(1, "LibravatarService.FromEmail:: %v", err)
+			}
+		}
+		if len(url) == 0 && !setting.DisableGravatar {
+			url = setting.GravatarSource + HashEmail(email)
+		}
 	}
 
-	return setting.GravatarSource + HashEmail(email)
+	if len(url) == 0 {
+		url = setting.AppSubUrl + "/img/avatar_default.png"
+	}
+
+	return url
 }
 
 // Seconds-based time units

modules/setting/setting.go

@@ -21,6 +21,7 @@ import (
 	"github.com/go-macaron/session"
 	_ "github.com/go-macaron/session/redis"
 	"gopkg.in/ini.v1"
+	"github.com/strk/go-libravatar"
 
 	"github.com/gogits/gogs/modules/bindata"
 	"github.com/gogits/gogs/modules/log"
@@ -143,6 +144,8 @@ var (
 	AvatarUploadPath  string
 	GravatarSource    string
 	DisableGravatar   bool
+	EnableFederatedAvatar   bool
+	LibravatarService *libravatar.Libravatar
 
 	// Log settings
 	LogRootPath string
@@ -462,8 +465,24 @@ func NewContext() {
 		GravatarSource = source
 	}
 	DisableGravatar = sec.Key("DISABLE_GRAVATAR").MustBool()
+	EnableFederatedAvatar = sec.Key("ENABLE_FEDERATED_AVATAR").MustBool()
 	if OfflineMode {
 		DisableGravatar = true
+		EnableFederatedAvatar = false
+	}
+
+	if !DisableGravatar && EnableFederatedAvatar {
+		LibravatarService = libravatar.New()
+		parts := strings.Split(GravatarSource, "/")
+		if len(parts) >= 3 {
+			if parts[0] == "https:" {
+				LibravatarService.SetUseHTTPS(true)
+				LibravatarService.SetSecureFallbackHost(parts[2])
+			} else {
+				LibravatarService.SetUseHTTPS(false)
+				LibravatarService.SetFallbackHost(parts[2])
+			}
+		}
 	}
 
 	if err = Cfg.Section("ui").MapTo(&UI); err != nil {

routers/admin/admin.go

@@ -222,6 +222,7 @@ func Config(ctx *context.Context) {
 	ctx.Data["SessionConfig"] = setting.SessionConfig
 
 	ctx.Data["DisableGravatar"] = setting.DisableGravatar
+	ctx.Data["EnableFederatedAvatar"] = setting.EnableFederatedAvatar
 
 	type logger struct {
 		Mode, Config string

routers/install.go

@@ -169,6 +169,7 @@ func Install(ctx *context.Context) {
 	// Server and other services settings
 	form.OfflineMode = setting.OfflineMode
 	form.DisableGravatar = setting.DisableGravatar
+	form.EnableFederatedAvatar = setting.EnableFederatedAvatar
 	form.DisableRegistration = setting.Service.DisableRegistration
 	form.EnableCaptcha = setting.Service.EnableCaptcha
 	form.RequireSignInView = setting.Service.RequireSignInView
@@ -329,6 +330,7 @@ func InstallPost(ctx *context.Context, form auth.InstallForm) {
 
 	cfg.Section("server").Key("OFFLINE_MODE").SetValue(com.ToStr(form.OfflineMode))
 	cfg.Section("picture").Key("DISABLE_GRAVATAR").SetValue(com.ToStr(form.DisableGravatar))
+	cfg.Section("picture").Key("ENABLE_FEDERATED_AVATAR").SetValue(com.ToStr(form.EnableFederatedAvatar))
 	cfg.Section("service").Key("DISABLE_REGISTRATION").SetValue(com.ToStr(form.DisableRegistration))
 	cfg.Section("service").Key("ENABLE_CAPTCHA").SetValue(com.ToStr(form.EnableCaptcha))
 	cfg.Section("service").Key("REQUIRE_SIGNIN_VIEW").SetValue(com.ToStr(form.RequireSignInView))

routers/org/setting.go

@@ -83,8 +83,8 @@ func SettingsPost(ctx *context.Context, form auth.UpdateOrgSettingForm) {
 	ctx.Redirect(ctx.Org.OrgLink + "/settings")
 }
 
-func SettingsAvatar(ctx *context.Context, form auth.UploadAvatarForm) {
-	form.Enable = true
+func SettingsAvatar(ctx *context.Context, form auth.AvatarForm) {
+	form.Source = auth.AVATAR_LOCAL
 	if err := user.UpdateAvatarSetting(ctx, form, ctx.Org.Organization); err != nil {
 		ctx.Flash.Error(err.Error())
 	} else {

routers/user/setting.go

@@ -22,6 +22,7 @@ import (
 
 const (
 	SETTINGS_PROFILE      base.TplName = "user/settings/profile"
+	SETTINGS_AVATAR       base.TplName = "user/settings/avatar"
 	SETTINGS_PASSWORD     base.TplName = "user/settings/password"
 	SETTINGS_EMAILS       base.TplName = "user/settings/email"
 	SETTINGS_SSH_KEYS     base.TplName = "user/settings/sshkeys"
@@ -91,10 +92,6 @@ func SettingsPost(ctx *context.Context, form auth.UpdateProfileForm) {
 	ctx.User.Email = form.Email
 	ctx.User.Website = form.Website
 	ctx.User.Location = form.Location
-	if len(form.Gravatar) > 0 {
-		ctx.User.Avatar = base.EncodeMD5(form.Gravatar)
-		ctx.User.AvatarEmail = form.Gravatar
-	}
 	if err := models.UpdateUser(ctx.User); err != nil {
 		ctx.Handle(500, "UpdateUser", err)
 		return
@@ -106,8 +103,12 @@ func SettingsPost(ctx *context.Context, form auth.UpdateProfileForm) {
 }
 
 // FIXME: limit size.
-func UpdateAvatarSetting(ctx *context.Context, form auth.UploadAvatarForm, ctxUser *models.User) error {
-	ctxUser.UseCustomAvatar = form.Enable
+func UpdateAvatarSetting(ctx *context.Context, form auth.AvatarForm, ctxUser *models.User) error {
+	ctxUser.UseCustomAvatar = form.Source == auth.AVATAR_LOCAL
+	if len(form.Gravatar) > 0 {
+		ctxUser.Avatar = base.EncodeMD5(form.Gravatar)
+		ctxUser.AvatarEmail = form.Gravatar
+	}
 
 	if form.Avatar != nil {
 		fr, err := form.Avatar.Open()
@@ -129,7 +130,7 @@ func UpdateAvatarSetting(ctx *context.Context, form auth.UploadAvatarForm, ctxUs
 	} else {
 		// No avatar is uploaded but setting has been changed to enable,
 		// generate a random one when needed.
-		if form.Enable && !com.IsFile(ctxUser.CustomAvatarPath()) {
+		if ctxUser.UseCustomAvatar && !com.IsFile(ctxUser.CustomAvatarPath()) {
 			if err := ctxUser.GenerateRandomAvatar(); err != nil {
 				log.Error(4, "GenerateRandomAvatar[%d]: %v", ctxUser.ID, err)
 			}
@@ -143,14 +144,20 @@ func UpdateAvatarSetting(ctx *context.Context, form auth.UploadAvatarForm, ctxUs
 	return nil
 }
 
-func SettingsAvatar(ctx *context.Context, form auth.UploadAvatarForm) {
+func SettingsAvatar(ctx *context.Context) {
+	ctx.Data["Title"] = ctx.Tr("settings")
+	ctx.Data["PageIsSettingsAvatar"] = true
+	ctx.HTML(200, SETTINGS_AVATAR)
+}
+
+func SettingsAvatarPost(ctx *context.Context, form auth.AvatarForm) {
 	if err := UpdateAvatarSetting(ctx, form, ctx.User); err != nil {
 		ctx.Flash.Error(err.Error())
 	} else {
 		ctx.Flash.Success(ctx.Tr("settings.update_avatar_success"))
 	}
 
-	ctx.Redirect(setting.AppSubUrl + "/user/settings")
+	ctx.Redirect(setting.AppSubUrl + "/user/settings/avatar")
 }
 
 func SettingsDeleteAvatar(ctx *context.Context) {
@@ -158,7 +165,7 @@ func SettingsDeleteAvatar(ctx *context.Context) {
 		ctx.Flash.Error(err.Error())
 	}
 
-	ctx.Redirect(setting.AppSubUrl + "/user/settings")
+	ctx.Redirect(setting.AppSubUrl + "/user/settings/avatar")
 }
 
 func SettingsPassword(ctx *context.Context) {

templates/admin/config.tmpl

@@ -215,6 +215,12 @@
 						<dd><i class="fa fa{{if .DisableGravatar}}-check{{end}}-square-o"></i></dd>
 					</dl>
 				</div>
+				<div class="ui attached table segment">
+					<dl class="dl-horizontal admin-dl-horizontal">
+						<dt>{{.i18n.Tr "admin.config.enable_federated_avatar"}}</dt>
+						<dd><i class="fa fa{{if .EnableFederatedAvatar}}-check{{end}}-square-o"></i></dd>
+					</dl>
+				</div>
 
 				<h4 class="ui top attached header">
 					{{.i18n.Tr "admin.config.log_config"}}

templates/install.tmpl

@@ -177,6 +177,12 @@
 									<input name="disable_gravatar" type="checkbox" {{if .disable_gravatar}}checked{{end}}>
 								</div>
 							</div>
+							<div class="inline field">
+								<div class="ui checkbox" id="federated-avatar-lookup">
+									<label class="poping up" data-content="{{.i18n.Tr "install.federated_avatar_lookup"}}"><strong>{{.i18n.Tr "install.federated_avatar_lookup"}}</strong></label>
+									<input name="enable_federated_avatar" type="checkbox" {{if .enable_federated_avatar}}checked{{end}}>
+								</div>
+							</div>
 							<div class="inline field">
 								<div class="ui checkbox" id="disable-registration">
 									<label class="poping up" data-content="{{.i18n.Tr "install.disable_registration_popup"}}"><strong>{{.i18n.Tr "install.disable_registration"}}</strong></label>

templates/user/settings/avatar.tmpl

@@ -0,0 +1,50 @@
+{{template "base/head" .}}
+<div class="user settings avatar">
+	<div class="ui container">
+		<div class="ui grid">
+			{{template "user/settings/navbar" .}}
+			<div class="twelve wide column content">
+				{{template "base/alert" .}}
+				<h4 class="ui top attached header">
+					{{.i18n.Tr "settings.avatar"}}
+				</h4>
+				<div class="ui attached segment">
+
+					<form class="ui form" action="{{.Link}}" method="post" enctype="multipart/form-data">
+						{{.CsrfTokenHtml}}
+						{{if not DisableGravatar}}
+						<div class="inline field">
+							<div class="ui radio">
+								<input name="source" value="lookup" type="radio" {{if not .SignedUser.UseCustomAvatar}}checked{{end}}>
+								<label>{{.i18n.Tr "settings.lookup_avatar_by_mail"}}</label>
+							</div>
+						</div>
+						<div class="field {{if .Err_Gravatar}}error{{end}}">
+							<label for="gravatar">Avatar {{.i18n.Tr "email"}}</label>
+							<input id="gravatar" name="gravatar" value="{{.SignedUser.AvatarEmail}}" />
+						</div>
+						{{end}}
+
+						<div class="inline field">
+							<div class="ui radio">
+								<input name="source" value="local" type="radio" {{if .SignedUser.UseCustomAvatar}}checked{{end}}>
+								<label>{{.i18n.Tr "settings.enable_custom_avatar"}}</label>
+							</div>
+						</div>
+
+						<div class="inline field">
+							<label for="avatar">{{.i18n.Tr "settings.choose_new_avatar"}}</label>
+							<input name="avatar" type="file" >
+						</div>
+
+						<div class="field">
+							<button class="ui green button">{{$.i18n.Tr "settings.update_avatar"}}</button>
+							<a class="ui red button delete-post" data-request-url="{{.Link}}/delete" data-done-url="{{.Link}}">{{$.i18n.Tr "settings.delete_current_avatar"}}</a>
+						</div>
+					</form>
+				</div>
+			</div>
+		</div>
+	</div>
+</div>
+{{template "base/footer" .}}

templates/user/settings/navbar.tmpl

@@ -4,6 +4,9 @@
 		<a class="{{if .PageIsSettingsProfile}}active{{end}} item" href="{{AppSubUrl}}/user/settings">
 			{{.i18n.Tr "settings.profile"}}
 		</a>
+		<a class="{{if .PageIsSettingsAvatar}}active{{end}} item" href="{{AppSubUrl}}/user/settings/avatar">
+			{{.i18n.Tr "settings.avatar"}}
+		</a>
 		<a class="{{if .PageIsSettingsPassword}}active{{end}} item" href="{{AppSubUrl}}/user/settings/password">
 			{{.i18n.Tr "settings.password"}}
 		</a>

templates/user/settings/profile.tmpl

@@ -35,38 +35,12 @@
 							<label for="location">{{.i18n.Tr "settings.location"}}</label>
 							<input id="location" name="location"  value="{{.SignedUser.Location}}">
 						</div>
-						{{if not DisableGravatar}}
-						<div class="field {{if .Err_Gravatar}}error{{end}}">
-							<label for="gravatar">Gravatar {{.i18n.Tr "email"}}</label>
-							<input id="gravatar" name="gravatar" value="{{.SignedUser.AvatarEmail}}" />
-						</div>
-						{{end}}
 
 						<div class="field">
 							<button class="ui green button">{{$.i18n.Tr "settings.update_profile"}}</button>
 						</div>
 					</form>
 
-					<div class="ui divider"></div>
-
-					<form class="ui form" action="{{.Link}}/avatar" method="post" enctype="multipart/form-data">
-						{{.CsrfTokenHtml}}
-						<div class="inline field">
-							<div class="ui checkbox">
-								<input name="enable" type="checkbox" {{if .SignedUser.UseCustomAvatar}}checked{{end}}>
-								<label>{{.i18n.Tr "settings.enable_custom_avatar"}}</label>
-							</div>
-						</div>
-						<div class="inline field">
-							<label for="avatar">{{.i18n.Tr "settings.choose_new_avatar"}}</label>
-							<input name="avatar" type="file" >
-						</div>
-
-						<div class="field">
-							<button class="ui green button">{{$.i18n.Tr "settings.update_avatar"}}</button>
-							<a class="ui red button delete-post" data-request-url="{{.Link}}/avatar/delete" data-done-url="{{.Link}}">{{$.i18n.Tr "settings.delete_current_avatar"}}</a>
-						</div>
-					</form>
 				</div>
 			</div>
 		</div>