Marko Tikvić / webutility

Blame view

email.go 2.76 KB
edit raw normal view history
bca3975fd   Marko Tikvić   email 
1
2
3
4
5
6
7
8
9
10
11
 
  package webutility
  
  // TODO(markO): test test test test test (and open source?)
  
  import (
  	"crypto/tls"
  	"errors"
  	"fmt"
  	"net/smtp"
  	"strings"
  )
bca3975fd   Marko Tikvić   email 
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
 
  type Email struct {
  	To      []string
  	From    string
  	Subject string
  	Body    string
  }
  
  func NewEmail(to []string, from, subject, body string) *Email {
  	return &Email{
  		To:      to,
  		From:    from,
  		Subject: subject,
  		Body:    body,
  	}
  }
2cff4b70c   Marko Tikvić   refactored email:... 
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
 
  func (e *Email) String() string {
  	var str strings.Builder
  
  	str.WriteString("From:" + e.From + "\r
  ")
  
  	str.WriteString("To:")
  	for i, _ := range e.To {
  		if i > 0 {
  			str.WriteString(",")
  		}
  		str.WriteString(e.To[i])
  	}
  	str.WriteString("\r
  ")
  
  	str.WriteString("Subject:" + e.Subject + "\r
  ")
  
  	// body
  	str.WriteString("\r
  " + e.Body + "\r
  ")
  
  	return str.String()
  }
  
  func (e *Email) Bytes() []byte {
  	return []byte(e.String())
  }
bca3975fd   Marko Tikvić   email 
57
58
59
 
  func SendEmail(email *Email, conf *EmailConfig) error {
  	if email == nil {
  		return errors.New("no email to send")
bca3975fd   Marko Tikvić   email 
60
61
62
 
  	}
  
  	if conf == nil {
2cff4b70c   Marko Tikvić   refactored email:... 
63
 
  		return errors.New("email configuration not provided")
bca3975fd   Marko Tikvić   email 
64
65
66
67
68
69
 
  	}
  
  	c, err := smtp.Dial(conf.ServerName)
  	if err != nil {
  		return err
  	}
bca3975fd   Marko Tikvić   email 
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
 
  	defer c.Close()
  
  	// not sure if this is needed
  	//if err = c.Hello(conf.ServerName); err != nil {
  	//	return err
  	//}
  
  	if ok, _ := c.Extension("STARTTLS"); ok {
  		// disable stupid tls check for self-signed certificates
  		config := &tls.Config{
  			ServerName:         conf.ServerName,
  			InsecureSkipVerify: true,
  		}
  		// for golang testing
  		//if testHookStartTLS != nil {
  		//	testHookStartTLS(config)
  		//}
  		if err = c.StartTLS(config); err != nil {
  			return err
  		}
  	}
  
  	/*
  		// don't know what to do with this
  		if a != nil && c.ext != nil {
  			if _, ok := c.ext["AUTH"]; !ok {
  				return errors.New("smtp: server doesn't support AUTH")
  			}
  			if err = c.Auth(a); err != nil {
  				return err
  			}
  		}
  	*/
  
  	// Set up authentication information.
  	auth := smtp.PlainAuth(conf.Identity, conf.Username, conf.Password, conf.Host)
  	if err = c.Auth(auth); err != nil {
  		return err
  	}
  
  	if err = c.Mail(email.From); err != nil {
  		return err
  	}
  
  	for _, addr := range email.To {
  		if err = c.Rcpt(addr); err != nil {
  			return err
  		}
  	}
  
  	w, err := c.Data()
  	if err != nil {
  		return err
  	}
  
  	_, err = w.Write(email.Bytes())
  	if err != nil {
  		return err
  	}
  
  	err = w.Close()
  	if err != nil {
  		return err
  	}
  
  	return c.Quit()
  }
2cff4b70c   Marko Tikvić   refactored email:... 
137
 
  type EmailConfig struct {
ab548c502   Marko Tikvić   added Valid() to ... 
138
139
140
141
142
143
 
  	ServerName string `json:"-"`
  	Identity   string `json:"-"`
  	Username   string `json:"username"`
  	Password   string `json:"password"`
  	Host       string `json:"host"`
  	Port       int    `json:"port"`
bca3975fd   Marko Tikvić   email 
144
 
  }
2cff4b70c   Marko Tikvić   refactored email:... 
145
146
147
148
149
150
151
152
153
 
  func NewEmailConfig(ident, uname, pword, host string, port int) *EmailConfig {
  	return &EmailConfig{
  		ServerName: host + fmt.Sprintf(":%d", port),
  		Identity:   ident,
  		Username:   uname,
  		Password:   pword,
  		Host:       host,
  		Port:       port,
  	}
bca3975fd   Marko Tikvić   email 
154
 
  }