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statping/notifiers/email.go

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cli testing - license
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// Statup
// Copyright (C) 2018. Hunter Long and the project contributors
// Written by Hunter Long <info@socialeck.com> and the project contributors
//
// https://github.com/hunterlong/statup
//
// The licenses for most software and other practical works are designed
// to take away your freedom to share and change the works. By contrast,
// the GNU General Public License is intended to guarantee your freedom to
// share and change all versions of a program--to make sure it remains free
// software for all its users.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package notifiers
import (
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"bytes"
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"crypto/tls"
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"fmt"
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"github.com/hunterlong/statup/core/notifier"
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"github.com/hunterlong/statup/types"
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"github.com/hunterlong/statup/utils"
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"gopkg.in/gomail.v2"
"html/template"
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)
const (
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MESSAGE = "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n<html xmlns=\"http://www.w3.org/1999/xhtml\" xmlns=\"http://www.w3.org/1999/xhtml\">\n<head>\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" />\n <meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n <title>Sample Email</title>\n\n\n</head>\n<body style=\"-webkit-text-size-adjust: none; box-sizing: border-box; color: #74787E; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; height: 100%; line-height: 1.4; margin: 0; width: 100% !important;\" bgcolor=\"#F2F4F6\"><style type=\"text/css\">\n body {\n width: 100% !important; height: 100%; margin: 0; line-height: 1.4; background-color: #F2F4F6; color: #74787E; -webkit-text-size-adjust: none;\n }\n @media only screen and (max-width: 600px) {\n .email-body_inner {\n width: 100% !important;\n }\n .email-footer {\n width: 100% !important;\n }\n }\n @media only screen and (max-width: 500px) {\n .button {\n width: 100% !important;\n }\n }\n</style>\n<table class=\"email-wrapper\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"box-sizing: border-box; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; margin: 0; padding: 0; width: 100%;\" bgcolor=\"#F2F4F6\">\n <tr>\n <td align=\"center\" style=\"box-sizing: border-box; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; word-break: break-word;\">\n <table class=\"email-content\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"box-sizing: border-box; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; margin: 0; padding: 0; width: 100%;\">\n\n <tr>\n <td class=\"email-body\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"-premailer-cellpadding: 0; -premailer-cellspacing: 0; border-bottom-color: #EDEFF2; border-bottom-style: solid; border-bottom-width: 1px; border-top-color: #EDEFF2; border-top-style: solid; border-top-width: 1px; box-sizing: border-box; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; margin: 0; padding: 0; width: 100%; word-break: break-word;\" bgcolor=\"#FFFFFF\">\n <table class=\"email-body_inner\" align=\"center\" width=\"570\" cellpadding=\"0\" cellspacing=\"0\" style=\"box-sizing: border-box; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; margin: 0 auto; padding: 0; width: 570px;\" bgcolor=\"#FFFFFF\">\n\n <tr>\n <td class=\"content-cell\" style=\"box-sizing: border-box; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; padding: 35px; word-break: break-word;\">\n <h1 style=\"box-sizing: border-box; color: #2F3133; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; font-size: 19px; font-weight: bold; margin-top: 0;\" align=\"left\">Looks Like Emails Work!</h1>\n <p style=\"box-sizing: border-box; color: #74787E; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; font-size: 16px; line-height: 1.5em; margin-top: 0;\" align=\"left\">\n Since you got this email, it confirms that your Statup Status Page email system is working correctly.\n </p>\n </p>\n <p style=\"box-sizing: border-box; color: #74787E; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; font-size: 16px; line-height: 1.5em; margin-top: 0;\" align=\"left\">\n Enjoy using Statup!\n <br />Statup.io Team</p>\n\n <table class=\"body-sub\" style=\"border-top-color: #EDEFF2; border-top-style: solid; border-top-width: 1px; box-sizing: border-box; font-family: Arial, 'Helve
FAILURE = "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n<html xmlns=\"http://www.w3.org/1999/xhtml\" xmlns=\"http://www.w3.org/1999/xhtml\">\n<head>\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" />\n <meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n <title>Sample Email</title>\n\n\n</head>\n<body style=\"-webkit-text-size-adjust: none; box-sizing: border-box; color: #74787E; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; height: 100%; line-height: 1.4; margin: 0; width: 100% !important;\" bgcolor=\"#F2F4F6\"><style type=\"text/css\">\n body {\n width: 100% !important; height: 100%; margin: 0; line-height: 1.4; background-color: #F2F4F6; color: #74787E; -webkit-text-size-adjust: none;\n }\n @media only screen and (max-width: 600px) {\n .email-body_inner {\n width: 100% !important;\n }\n .email-footer {\n width: 100% !important;\n }\n }\n @media only screen and (max-width: 500px) {\n .button {\n width: 100% !important;\n }\n }\n</style>\n<table class=\"email-wrapper\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"box-sizing: border-box; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; margin: 0; padding: 0; width: 100%;\" bgcolor=\"#F2F4F6\">\n <tr>\n <td align=\"center\" style=\"box-sizing: border-box; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; word-break: break-word;\">\n <table class=\"email-content\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"box-sizing: border-box; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; margin: 0; padding: 0; width: 100%;\">\n\n <tr>\n <td class=\"email-body\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"-premailer-cellpadding: 0; -premailer-cellspacing: 0; border-bottom-color: #EDEFF2; border-bottom-style: solid; border-bottom-width: 1px; border-top-color: #EDEFF2; border-top-style: solid; border-top-width: 1px; box-sizing: border-box; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; margin: 0; padding: 0; width: 100%; word-break: break-word;\" bgcolor=\"#FFFFFF\">\n <table class=\"email-body_inner\" align=\"center\" width=\"570\" cellpadding=\"0\" cellspacing=\"0\" style=\"box-sizing: border-box; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; margin: 0 auto; padding: 0; width: 570px;\" bgcolor=\"#FFFFFF\">\n\n <tr>\n <td class=\"content-cell\" style=\"box-sizing: border-box; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; padding: 35px; word-break: break-word;\">\n <h1 style=\"box-sizing: border-box; color: #2F3133; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; font-size: 19px; font-weight: bold; margin-top: 0;\" align=\"left\">{{ .Service.Name }} is Offline!</h1>\n <p style=\"box-sizing: border-box; color: #74787E; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; font-size: 16px; line-height: 1.5em; margin-top: 0;\" align=\"left\">\n Your Statup service '<a target=\"_blank\" href=\"{{.Service.Domain}}\">{{.Service.Name}}</a>' has been triggered with a HTTP status code of '{{.Service.LastStatusCode}}' and is currently offline based on your requirements. This failure was created on {{.Service.CreatedAt}}.\n </p>\n\n {{if .Service.LastResponse }}\n <h1 style=\"box-sizing: border-box; color: #2F3133; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; font-size: 19px; font-weight: bold; margin-top: 0;\" align=\"left\">Last Response</h1>\n <p style=\"box-sizing: border-box; color: #74787E; font-family: Ar
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SUCCESS = "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n<html xmlns=\"http://www.w3.org/1999/xhtml\" xmlns=\"http://www.w3.org/1999/xhtml\">\n<head>\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" />\n <meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n <title>Sample Email</title>\n\n\n</head>\n<body style=\"-webkit-text-size-adjust: none; box-sizing: border-box; color: #74787E; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; height: 100%; line-height: 1.4; margin: 0; width: 100% !important;\" bgcolor=\"#F2F4F6\"><style type=\"text/css\">\n body {\n width: 100% !important; height: 100%; margin: 0; line-height: 1.4; background-color: #F2F4F6; color: #74787E; -webkit-text-size-adjust: none;\n }\n @media only screen and (max-width: 600px) {\n .email-body_inner {\n width: 100% !important;\n }\n .email-footer {\n width: 100% !important;\n }\n }\n @media only screen and (max-width: 500px) {\n .button {\n width: 100% !important;\n }\n }\n</style>\n<table class=\"email-wrapper\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"box-sizing: border-box; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; margin: 0; padding: 0; width: 100%;\" bgcolor=\"#F2F4F6\">\n <tr>\n <td align=\"center\" style=\"box-sizing: border-box; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; word-break: break-word;\">\n <table class=\"email-content\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"box-sizing: border-box; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; margin: 0; padding: 0; width: 100%;\">\n\n <tr>\n <td class=\"email-body\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"-premailer-cellpadding: 0; -premailer-cellspacing: 0; border-bottom-color: #EDEFF2; border-bottom-style: solid; border-bottom-width: 1px; border-top-color: #EDEFF2; border-top-style: solid; border-top-width: 1px; box-sizing: border-box; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; margin: 0; padding: 0; width: 100%; word-break: break-word;\" bgcolor=\"#FFFFFF\">\n <table class=\"email-body_inner\" align=\"center\" width=\"570\" cellpadding=\"0\" cellspacing=\"0\" style=\"box-sizing: border-box; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; margin: 0 auto; padding: 0; width: 570px;\" bgcolor=\"#FFFFFF\">\n\n <tr>\n <td class=\"content-cell\" style=\"box-sizing: border-box; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; padding: 35px; word-break: break-word;\">\n <h1 style=\"box-sizing: border-box; color: #2F3133; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; font-size: 19px; font-weight: bold; margin-top: 0;\" align=\"left\">{{ .Service.Name }} is Offline!</h1>\n <p style=\"box-sizing: border-box; color: #74787E; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; font-size: 16px; line-height: 1.5em; margin-top: 0;\" align=\"left\">\n Your Statup service '<a target=\"_blank\" href=\"{{.Service.Domain}}\">{{.Service.Name}}</a>' has been triggered with a HTTP status code of '{{.Service.LastStatusCode}}' and is currently offline based on your requirements. This failure was created on {{.Service.CreatedAt}}.\n </p>\n\n {{if .Service.LastResponse }}\n <h1 style=\"box-sizing: border-box; color: #2F3133; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; font-size: 19px; font-weight: bold; margin-top: 0;\" align=\"left\">Last Response</h1>\n <p style=\"box-sizing: border-box; color: #74787E; font-family: Ar
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)
var (
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mailer *gomail.Dialer
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)
type Email struct {
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*notifier.Notification
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}
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var emailer = &Email{&notifier.Notification{
Method: "email",
Title: "Email",
Description: "Send emails via SMTP when notification are online or offline.",
Author: "Hunter Long",
AuthorUrl: "https://github.com/hunterlong",
Form: []notifier.NotificationForm{{
Type: "text",
Title: "SMTP Host",
Placeholder: "Insert your SMTP Host here.",
DbField: "Host",
}, {
Type: "text",
Title: "SMTP Username",
Placeholder: "Insert your SMTP Username here.",
DbField: "Username",
}, {
Type: "password",
Title: "SMTP Password",
Placeholder: "Insert your SMTP Password here.",
DbField: "Password",
}, {
Type: "number",
Title: "SMTP Port",
Placeholder: "Insert your SMTP Port here.",
DbField: "Port",
}, {
Type: "text",
Title: "Outgoing Email Address",
Placeholder: "Insert your Outgoing Email Address",
DbField: "Var1",
}, {
Type: "email",
Title: "Send Alerts To",
Placeholder: "Email Address",
DbField: "Var2",
}},
}}
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func init() {
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err := notifier.AddNotifier(emailer)
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if err != nil {
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panic(err)
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}
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}
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// Send will send the SMTP email with your authentication It accepts type: *EmailOutgoing
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func (u *Email) Send(msg interface{}) error {
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email := msg.(*EmailOutgoing)
err := u.dialSend(email)
if err != nil {
utils.Log(3, fmt.Sprintf("Email Notifier could not send email: %v", err))
return err
}
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return nil
}
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func (u *Email) OnTest(n notifier.Notification) (bool, error) {
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email := &EmailOutgoing{
To: emailer.GetValue("var2"),
Subject: "Test Email",
Template: MESSAGE,
Data: nil,
From: emailer.GetValue("var1"),
}
u.AddQueue(email)
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return true, nil
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}
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type EmailOutgoing struct {
To string
Subject string
Template string
From string
Data interface{}
Source string
Sent bool
}
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// OnFailure will trigger failing service
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func (u *Email) OnFailure(s *types.Service, f *types.Failure) {
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email := &EmailOutgoing{
To: emailer.GetValue("var2"),
Subject: fmt.Sprintf("Service %v is Failing", s.Name),
Template: FAILURE,
Data: interface{}(s),
From: emailer.GetValue("var1"),
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}
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u.AddQueue(email)
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u.Online = false
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}
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// OnSuccess will trigger successful service
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func (u *Email) OnSuccess(s *types.Service) {
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if !u.Online {
email := &EmailOutgoing{
To: emailer.GetValue("var2"),
Subject: fmt.Sprintf("Service %v is Back Online", s.Name),
Template: SUCCESS,
Data: interface{}(s),
From: emailer.GetValue("var1"),
}
u.AddQueue(email)
}
u.Online = true
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}
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func (u *Email) Select() *notifier.Notification {
return u.Notification
}
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// OnSave triggers when this notifier has been saved
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func (u *Email) OnSave() error {
utils.Log(1, fmt.Sprintf("Notification %v is receiving updated information.", u.Method))
// Do updating stuff here
return nil
}
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func (u *Email) dialSend(email *EmailOutgoing) error {
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mailer = gomail.NewPlainDialer(emailer.Host, emailer.Port, emailer.Username, emailer.Password)
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mailer.TLSConfig = &tls.Config{InsecureSkipVerify: true}
emailSource(email)
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m := gomail.NewMessage()
m.SetHeader("From", email.From)
m.SetHeader("To", email.To)
m.SetHeader("Subject", email.Subject)
m.SetBody("text/html", email.Source)
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if err := mailer.DialAndSend(m); err != nil {
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utils.Log(3, fmt.Sprintf("Email '%v' sent to: %v using the %v template (size: %v) %v", email.Subject, email.To, email.Template, len([]byte(email.Source)), err))
return err
}
return nil
}
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func emailSource(email *EmailOutgoing) {
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source := EmailTemplate(email.Template, email.Data)
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email.Source = source
}
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func EmailTemplate(contents string, data interface{}) string {
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t := template.New("email")
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t, err := t.Parse(contents)
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if err != nil {
utils.Log(3, err)
}
var tpl bytes.Buffer
if err := t.Execute(&tpl, data); err != nil {
utils.Log(2, err)
}
result := tpl.String()
return result
}