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Try to prevent autolinking of displaynames by email readers (#19169) (#19183) 

Backport #19169

Unfortunately many email readers will (helpfully) detect url or url-like names and
automatically create links to them, even in HTML emails. This is not ideal when
usernames can have dots in them.

This PR tries to prevent this behaviour by sticking ZWJ characters between dots and
also set the meta tag to prevent format detection.

Not every email template has been changed in this way - just the activation emails but
it may be that we should be setting the above meta tag in all of our emails too.

Signed-off-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath 2022-03-23 13:18:11 +00:00 committed by GitHub
parent d21b7fd3af
commit bb0e2121a3
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
8 changed files with 38 additions and 22 deletions
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5
modules/templates/helper.go
View File

@ -633,6 +633,11 @@ func JSEscape(raw string) string {
return template.JSEscapeString(raw)
}
// DotEscape wraps a dots in names with ZWJ [U+200D] in order to prevent autolinkers from detecting these as urls
func DotEscape(raw string) string {
return strings.ReplaceAll(raw, ".", "\u200d.\u200d")
}
// Sha1 returns sha1 sum of string
func Sha1(str string) string {
return base.EncodeSha1(str)

5
services/mailer/mail.go
View File

@ -79,6 +79,7 @@ func sendUserMail(language string, u *user_model.User, tpl base.TplName, code, s
// helper
"i18n": locale,
"Str2html": templates.Str2html,
"DotEscape": templates.DotEscape,
}
var content bytes.Buffer
@ -129,6 +130,7 @@ func SendActivateEmailMail(u *user_model.User, email *user_model.EmailAddress) {
// helper
"i18n": locale,
"Str2html": templates.Str2html,
"DotEscape": templates.DotEscape,
}
var content bytes.Buffer
@ -159,6 +161,7 @@ func SendRegisterNotifyMail(u *user_model.User) {
// helper
"i18n": locale,
"Str2html": templates.Str2html,
"DotEscape": templates.DotEscape,
}
var content bytes.Buffer
@ -192,6 +195,7 @@ func SendCollaboratorMail(u, doer *user_model.User, repo *repo_model.Repository)
// helper
"i18n": locale,
"Str2html": templates.Str2html,
"DotEscape": templates.DotEscape,
}
var content bytes.Buffer
@ -275,6 +279,7 @@ func composeIssueCommentMessages(ctx *mailCommentContext, lang string, recipient
// helper
"i18n": locale,
"Str2html": templates.Str2html,
"DotEscape": templates.DotEscape,
}
var mailSubject bytes.Buffer

1
services/mailer/mail_release.go
View File

@ -76,6 +76,7 @@ func mailNewRelease(lang string, tos []string, rel *models.Release) {
// helper
"i18n": locale,
"Str2html": templates.Str2html,
"DotEscape": templates.DotEscape,
}
var mailBody bytes.Buffer

1
services/mailer/mail_repo.go
View File

@ -75,6 +75,7 @@ func sendRepoTransferNotifyMailPerLang(lang string, newOwner, doer *user_model.U
// helper
"i18n": locale,
"Str2html": templates.Str2html,
"DotEscape": templates.DotEscape,
}
if err := bodyTemplates.ExecuteTemplate(&content, string(mailRepoTransferNotify), data); err != nil {

5
templates/mail/auth/activate.tmpl
View File

@ -2,12 +2,13 @@
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>{{.i18n.Tr "mail.activate_account.title" .DisplayName}}</title>
<meta name="format-detection" content="telephone=no,date=no,address=no,email=no,url=no"/>
<title>{{.i18n.Tr "mail.activate_account.title" (.DisplayName|DotEscape)}}</title>
</head>
{{ $activate_url := printf "%suser/activate?code=%s" AppUrl (QueryEscape .Code)}}
<body>
<p>{{.i18n.Tr "mail.activate_account.text_1" .DisplayName AppName | Str2html}}</p><br>
<p>{{.i18n.Tr "mail.activate_account.text_1" (.DisplayName|DotEscape) AppName | Str2html}}</p><br>
<p>{{.i18n.Tr "mail.activate_account.text_2" .ActiveCodeLives | Str2html}}</p><p><a href="{{$activate_url}}">{{$activate_url}}</a></p><br>
<p>{{.i18n.Tr "mail.link_not_working_do_paste"}}</p>

5
templates/mail/auth/activate_email.tmpl
View File

@ -2,12 +2,13 @@
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>{{.i18n.Tr "mail.activate_email.title" .DisplayName}}</title>
<meta name="format-detection" content="telephone=no,date=no,address=no,email=no,url=no"/>
<title>{{.i18n.Tr "mail.activate_email.title" (.DisplayName|DotEscape)}}</title>
</head>
{{ $activate_url := printf "%suser/activate_email?code=%s&email=%s" AppUrl (QueryEscape .Code) (QueryEscape .Email)}}
<body>
<p>{{.i18n.Tr "mail.hi_user_x" .DisplayName | Str2html}}</p><br>
<p>{{.i18n.Tr "mail.hi_user_x" (.DisplayName|DotEscape) | Str2html}}</p><br>
<p>{{.i18n.Tr "mail.activate_email.text" .ActiveCodeLives | Str2html}}</p><p><a href="{{$activate_url}}">{{$activate_url}}</a></p><br>
<p>{{.i18n.Tr "mail.link_not_working_do_paste"}}</p>

5
templates/mail/auth/register_notify.tmpl
View File

@ -2,12 +2,13 @@
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>{{.i18n.Tr "mail.register_notify.title" .DisplayName AppName}}</title>
<meta name="format-detection" content="telephone=no,date=no,address=no,email=no,url=no"/>
<title>{{.i18n.Tr "mail.register_notify.title" (.DisplayName|DotEscape) AppName}}</title>
</head>
{{$set_pwd_url := printf "%[1]suser/forgot_password" AppUrl}}
<body>
<p>{{.i18n.Tr "mail.hi_user_x" .DisplayName | Str2html}}</p><br>
<p>{{.i18n.Tr "mail.hi_user_x" (.DisplayName|DotEscape) | Str2html}}</p><br>
<p>{{.i18n.Tr "mail.register_notify.text_1" AppName}}</p><br>
<p>{{.i18n.Tr "mail.register_notify.text_2" .Username}}</p><p><a href="{{AppUrl}}user/login">{{AppUrl}}user/login</a></p><br>
<p>{{.i18n.Tr "mail.register_notify.text_3" ($set_pwd_url | Escape) | Str2html}}</p><br>

5
templates/mail/auth/reset_passwd.tmpl
View File

@ -2,12 +2,13 @@
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>{{.i18n.Tr "mail.reset_password.title" .DisplayName}}</title>
<meta name="format-detection" content="telephone=no,date=no,address=no,email=no,url=no"/>
<title>{{.i18n.Tr "mail.reset_password.title" (.DisplayName|DotEscape)}}</title>
</head>
{{ $recover_url := printf "%suser/recover_account?code=%s" AppUrl (QueryEscape .Code)}}
<body>
<p>{{.i18n.Tr "mail.hi_user_x" .DisplayName | Str2html}}</p><br>
<p>{{.i18n.Tr "mail.hi_user_x" (.DisplayName|DotEscape) | Str2html}}</p><br>
<p>{{.i18n.Tr "mail.reset_password.text" .ResetPwdCodeLives | Str2html}}</p><p><a href="{{$recover_url}}">{{$recover_url}}</a></p><br>
<p>{{.i18n.Tr "mail.link_not_working_do_paste"}}</p>