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[bug] Send plaintext emails to fix "message refused: Message is not RFC 2822 compliant" (#366)

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* trying to fix "message refused: Message is not RFC 2822 compliant"

* fix "message refused: Message is not RFC 2822 compliant"

550 5.7.1 Delivery not authorized, message refused: Message is not RFC
2822 compliant

* remove silly regex

* lint

* fix tests

* we should use text/template instead of html/template now
This commit is contained in:
Forest Johnson 2022-01-31 10:46:20 +00:00 committed by GitHub
parent 959e38ac5c
commit 5be8a7a7ea
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GPG key ID: 4AEE18F83AFDEB23
11 changed files with 78 additions and 28 deletions
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14
internal/email/confirm.go
View file

@ -21,11 +21,15 @@ package email
import (
"bytes"
"net/smtp"
"github.com/sirupsen/logrus"
"github.com/spf13/viper"
"github.com/superseriousbusiness/gotosocial/internal/config"
)
const (
confirmTemplate = "email_confirm.tmpl"
confirmSubject = "Subject: GoToSocial Email Confirmation"
confirmTemplate = "email_confirm_text.tmpl"
confirmSubject = "GoToSocial Email Confirmation"
)
func (s *sender) SendConfirmEmail(toAddress string, data ConfirmData) error {
@ -35,7 +39,11 @@ func (s *sender) SendConfirmEmail(toAddress string, data ConfirmData) error {
}
confirmBody := buf.String()
msg := assembleMessage(confirmSubject, confirmBody, toAddress, s.from)
msg, err := assembleMessage(confirmSubject, confirmBody, toAddress, s.from)
if err != nil {
return err
}
logrus.WithField("func", "SendConfirmEmail").Trace(s.hostAddress + "\n" + viper.GetString(config.Keys.SMTPUsername) + ":password" + "\n" + s.from + "\n" + toAddress + "\n\n" + string(msg) + "\n")
return smtp.SendMail(s.hostAddress, s.auth, s.from, []string{toAddress}, msg)
}

12
internal/email/noopsender.go
View file

@ -20,7 +20,7 @@ package email
import (
"bytes"
"html/template"
"text/template"
"github.com/sirupsen/logrus"
"github.com/spf13/viper"
@ -57,7 +57,10 @@ func (s *noopSender) SendConfirmEmail(toAddress string, data ConfirmData) error
}
confirmBody := buf.String()
msg := assembleMessage(confirmSubject, confirmBody, toAddress, "test@example.org")
msg, err := assembleMessage(confirmSubject, confirmBody, toAddress, "test@example.org")
if err != nil {
return err
}
logrus.Tracef("NOT SENDING confirmation email to %s with contents: %s", toAddress, msg)
@ -74,7 +77,10 @@ func (s *noopSender) SendResetEmail(toAddress string, data ResetData) error {
}
resetBody := buf.String()
msg := assembleMessage(resetSubject, resetBody, toAddress, "test@example.org")
msg, err := assembleMessage(resetSubject, resetBody, toAddress, "test@example.org")
if err != nil {
return err
}
logrus.Tracef("NOT SENDING reset email to %s with contents: %s", toAddress, msg)

9
internal/email/reset.go
View file

@ -24,8 +24,8 @@ import (
)
const (
resetTemplate = "email_reset.tmpl"
resetSubject = "Subject: GoToSocial Password Reset"
resetTemplate = "email_reset_text.tmpl"
resetSubject = "GoToSocial Password Reset"
)
func (s *sender) SendResetEmail(toAddress string, data ResetData) error {
@ -35,7 +35,10 @@ func (s *sender) SendResetEmail(toAddress string, data ResetData) error {
}
resetBody := buf.String()
msg := assembleMessage(resetSubject, resetBody, toAddress, s.from)
msg, err := assembleMessage(resetSubject, resetBody, toAddress, s.from)
if err != nil {
return err
}
return smtp.SendMail(s.hostAddress, s.auth, s.from, []string{toAddress}, msg)
}

2
internal/email/sender.go
View file

@ -20,8 +20,8 @@ package email
import (
"fmt"
"html/template"
"net/smtp"
"text/template"
"github.com/spf13/viper"
"github.com/superseriousbusiness/gotosocial/internal/config"

45
internal/email/util.go
View file

@ -19,15 +19,12 @@
package email
import (
"errors"
"fmt"
"html/template"
"os"
"path/filepath"
)
const (
mime = `MIME-version: 1.0;
Content-Type: text/html;`
"strings"
"text/template"
)
func loadTemplates(templateBaseDir string) (*template.Template, error) {
@ -41,16 +38,34 @@ func loadTemplates(templateBaseDir string) (*template.Template, error) {
return template.ParseGlob(tmPath)
}
func assembleMessage(mailSubject string, mailBody string, mailTo string, mailFrom string) []byte {
from := fmt.Sprintf("From: GoToSocial <%s>", mailFrom)
to := fmt.Sprintf("To: %s", mailTo)
// https://datatracker.ietf.org/doc/html/rfc2822
// I did not read the RFC, I just copy and pasted from
// https://pkg.go.dev/net/smtp#SendMail
// and it did seem to work.
func assembleMessage(mailSubject string, mailBody string, mailTo string, mailFrom string) ([]byte, error) {
if strings.Contains(mailSubject, "\r") || strings.Contains(mailSubject, "\n") {
return nil, errors.New("email subject must not contain newline characters")
}
if strings.Contains(mailFrom, "\r") || strings.Contains(mailFrom, "\n") {
return nil, errors.New("email from address must not contain newline characters")
}
if strings.Contains(mailTo, "\r") || strings.Contains(mailTo, "\n") {
return nil, errors.New("email to address must not contain newline characters")
}
// normalize the message body to use CRLF line endings
mailBody = strings.ReplaceAll(mailBody, "\r\n", "\n")
mailBody = strings.ReplaceAll(mailBody, "\n", "\r\n")
msg := []byte(
mailSubject + "\r\n" +
from + "\r\n" +
to + "\r\n" +
mime + "\r\n" +
mailBody + "\r\n")
"To: " + mailTo + "\r\n" +
"Subject: " + mailSubject + "\r\n" +
"\r\n" +
mailBody + "\r\n",
)
return msg
return msg, nil
}

4
internal/email/util_test.go
View file

@ -39,7 +39,7 @@ func (suite *UtilTestSuite) TestTemplateConfirm() {
suite.sender.SendConfirmEmail("user@example.org", confirmData)
suite.Len(suite.sentEmails, 1)
suite.Equal("Subject: GoToSocial Email Confirmation\r\nFrom: GoToSocial <test@example.org>\r\nTo: user@example.org\r\nMIME-version: 1.0;\nContent-Type: text/html;\r\n<!DOCTYPE html>\n<html>\n </head>\n <body>\n <div>\n <h1>\n Hello test!\n </h1>\n </div>\n <div>\n <p>\n You are receiving this mail because you've requested an account on <a href=\"https://example.org\">Test Instance</a>.\n </p>\n <p>\n We just need to confirm that this is your email address. To confirm your email, <a href=\"https://example.org/confirm_email?token=ee24f71d-e615-43f9-afae-385c0799b7fa\">click here</a> or paste the following in your browser's address bar:\n </p>\n <p>\n <code>\n https://example.org/confirm_email?token=ee24f71d-e615-43f9-afae-385c0799b7fa\n </code>\n </p>\n </div>\n <div>\n <p>\n If you believe you've been sent this email in error, feel free to ignore it, or contact the administrator of <a href=\"https://example.org\">Test Instance</a>.\n </p>\n </div>\n </body>\n</html>\r\n", suite.sentEmails["user@example.org"])
suite.Equal("To: user@example.org\r\nSubject: GoToSocial Email Confirmation\r\n\r\nHello test!\r\n\r\nYou are receiving this mail because you've requested an account on https://example.org.\r\n\r\nWe just need to confirm that this is your email address. To confirm your email, paste the following in your browser's address bar:\r\n\r\nhttps://example.org/confirm_email?token=ee24f71d-e615-43f9-afae-385c0799b7fa\r\n\r\nIf you believe you've been sent this email in error, feel free to ignore it, or contact the administrator of https://example.org\r\n\r\n", suite.sentEmails["user@example.org"])
}
func (suite *UtilTestSuite) TestTemplateReset() {
@ -52,7 +52,7 @@ func (suite *UtilTestSuite) TestTemplateReset() {
suite.sender.SendResetEmail("user@example.org", resetData)
suite.Len(suite.sentEmails, 1)
suite.Equal("Subject: GoToSocial Password Reset\r\nFrom: GoToSocial <test@example.org>\r\nTo: user@example.org\r\nMIME-version: 1.0;\nContent-Type: text/html;\r\n<!DOCTYPE html>\n<html>\n </head>\n <body>\n <div>\n <h1>\n Hello test!\n </h1>\n </div>\n <div>\n <p>\n You are receiving this mail because a password reset has been requested for your account on <a href=\"https://example.org\">Test Instance</a>.\n </p>\n <p>\n To reset your password, <a href=\"https://example.org/reset_email?token=ee24f71d-e615-43f9-afae-385c0799b7fa\">click here</a> or paste the following in your browser's address bar:\n </p>\n <p>\n <code>\n https://example.org/reset_email?token=ee24f71d-e615-43f9-afae-385c0799b7fa\n </code>\n </p>\n </div>\n <div>\n <p>\n If you believe you've been sent this email in error, feel free to ignore it, or contact the administrator of <a href=\"https://example.org\">Test Instance</a>.\n </p>\n </div>\n </body>\n</html>\r\n", suite.sentEmails["user@example.org"])
suite.Equal("To: user@example.org\r\nSubject: GoToSocial Password Reset\r\n\r\nHello test!\r\n\r\nYou are receiving this mail because a password reset has been requested for your account on https://example.org.\r\n\r\nTo reset your password, paste the following in your browser's address bar:\r\n\r\nhttps://example.org/reset_email?token=ee24f71d-e615-43f9-afae-385c0799b7fa\r\n\r\nIf you believe you've been sent this email in error, feel free to ignore it, or contact the administrator of https://example.org.\r\n\r\n", suite.sentEmails["user@example.org"])
}
func TestUtilTestSuite(t *testing.T) {

2
internal/processing/user/emailconfirm_test.go
View file

@ -54,7 +54,7 @@ func (suite *EmailConfirmTestSuite) TestSendConfirmEmail() {
suite.NotEmpty(token)
// email should contain the token
emailShould := fmt.Sprintf("Subject: GoToSocial Email Confirmation\r\nFrom: GoToSocial <test@example.org>\r\nTo: some.email@example.org\r\nMIME-version: 1.0;\nContent-Type: text/html;\r\n<!DOCTYPE html>\n<html>\n </head>\n <body>\n <div>\n <h1>\n Hello the_mighty_zork!\n </h1>\n </div>\n <div>\n <p>\n You are receiving this mail because you've requested an account on <a href=\"http://localhost:8080\">localhost:8080</a>.\n </p>\n <p>\n We just need to confirm that this is your email address. To confirm your email, <a href=\"http://localhost:8080/confirm_email?token=%s\">click here</a> or paste the following in your browser's address bar:\n </p>\n <p>\n <code>\n http://localhost:8080/confirm_email?token=%s\n </code>\n </p>\n </div>\n <div>\n <p>\n If you believe you've been sent this email in error, feel free to ignore it, or contact the administrator of <a href=\"http://localhost:8080\">localhost:8080</a>.\n </p>\n </div>\n </body>\n</html>\r\n", token, token)
emailShould := fmt.Sprintf("To: some.email@example.org\r\nSubject: GoToSocial Email Confirmation\r\n\r\nHello the_mighty_zork!\r\n\r\nYou are receiving this mail because you've requested an account on http://localhost:8080.\r\n\r\nWe just need to confirm that this is your email address. To confirm your email, paste the following in your browser's address bar:\r\n\r\nhttp://localhost:8080/confirm_email?token=%s\r\n\r\nIf you believe you've been sent this email in error, feel free to ignore it, or contact the administrator of http://localhost:8080\r\n\r\n", token)
suite.Equal(emailShould, email)
// confirmationSentAt should be recent

0
web/template/email_confirm.tmpl → web/template/email_confirm_html.tmpl
View file

9
web/template/email_confirm_text.tmpl Normal file
View file

@ -0,0 +1,9 @@
Hello {{.Username}}!
You are receiving this mail because you've requested an account on {{.InstanceURL}}.
We just need to confirm that this is your email address. To confirm your email, paste the following in your browser's address bar:
{{.ConfirmLink}}
If you believe you've been sent this email in error, feel free to ignore it, or contact the administrator of {{.InstanceURL}}

0
web/template/email_reset.tmpl → web/template/email_reset_html.tmpl
View file

9
web/template/email_reset_text.tmpl Normal file
View file

@ -0,0 +1,9 @@
Hello {{.Username}}!
You are receiving this mail because a password reset has been requested for your account on {{.InstanceURL}}.
To reset your password, paste the following in your browser's address bar:
{{.ResetLink}}
If you believe you've been sent this email in error, feel free to ignore it, or contact the administrator of {{.InstanceURL}}.