CLI email sender
This commit is contained in:
Bel LaPointe
330
.email.go
Executable file
330
.email.go
Executable file
@@ -0,0 +1,330 @@
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package contact
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import (
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"crypto/tls"
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"fmt"
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"local/system/sysconf"
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"log"
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"net"
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"net/smtp"
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"regexp"
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"strings"
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"time"
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pop3 "github.com/taknb2nch/go-pop3"
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)
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// Emailer allows sending of emails (or better
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// texts with the right address) with TLS.
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type Emailer interface {
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Send(string, string) error
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Check() []Email
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}
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type emailer struct {
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to string
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from string
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smtpServer string
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pop3Server string
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pwd string
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}
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type Email struct {
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To string
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From string
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Date time.Time
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Subject string
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Body string
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}
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func (e Email) String() string {
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return fmt.Sprintf("To: %q\nFrom: %q\nSubj: %q\nDate: %q\nBody: %q", e.To, e.From, e.Subject, e.Date.String(), e.Body)
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}
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// NewEmailer returns a emailer capable of Send()ing
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// To the given address.
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func NewEmailer(To string) Emailer {
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config := sysconf.Get("email")
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return &emailer{
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smtpServer: config.IP,
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pop3Server: config.IP2,
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to: To,
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from: config.Log,
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pwd: config.Port,
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}
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}
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// Send sends an email To the configured address with
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// the given Subject and message.
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func (e *emailer) Send(subj, msg string) error {
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// Setup headers
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headers := make(map[string]string)
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headers["From"] = e.from
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headers["To"] = e.to
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headers["Subject"] = subj
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Body := ""
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for k, v := range headers {
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Body += fmt.Sprintf("%s: %s\r\n", k, v)
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}
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Body += "\r\n" + msg
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// Connect To the SMTP Server
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c := e.newSmtpClient()
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defer c.Quit()
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// To && From
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if err := c.Mail(e.from); err != nil {
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log.Panic(err)
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}
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if err := c.Rcpt(e.to); err != nil {
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log.Panic(err)
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}
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// Data
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w, err := c.Data()
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if err != nil {
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log.Panic(err)
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}
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_, err = w.Write([]byte(Body))
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if err != nil {
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log.Panic(err)
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}
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err = w.Close()
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if err != nil {
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log.Panic(err)
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}
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return nil
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}
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func (e *emailer) newSmtpClient() *smtp.Client {
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host, _, _ := net.SplitHostPort(e.smtpServer)
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auth := smtp.PlainAuth("", e.from, e.pwd, host)
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conn := e.getConn(e.smtpServer)
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c, err := smtp.NewClient(conn, host)
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if err != nil {
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log.Panic(err)
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}
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// Auth
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if err = c.Auth(auth); err != nil {
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log.Panic(err)
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}
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return c
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}
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func (e *emailer) getConn(remote string) net.Conn {
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host, _, _ := net.SplitHostPort(remote)
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tlsconfig := &tls.Config{
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InsecureSkipVerify: true,
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ServerName: host,
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}
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// Here is the key, you need To call tls.Dial instead of smtp.Dial
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// for smtp servers running on 465 that require an ssl connection
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// From the very beginning (no starttls)
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conn, err := tls.Dial("tcp", remote, tlsconfig)
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if err != nil {
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log.Panic(err)
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}
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return conn
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}
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func (e *emailer) newPop3Client() *pop3.Client {
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conn := e.getConn(e.pop3Server)
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client, err := pop3.NewClient(conn)
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if err != nil {
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log.Fatalf("Dial Error: %v\n", err)
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}
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if err = client.User(e.from); err != nil {
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log.Panicf("User Error: %v\n", err)
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}
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if err = client.Pass(e.pwd); err != nil {
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log.Panicf("Pass Error: %v\n", err)
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}
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return client
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}
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func (e *emailer) Check() []Email {
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client := e.newPop3Client()
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defer func() {
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client.Quit()
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client.Close()
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}()
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var count int
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var err error
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if count, _, err = client.Stat(); err != nil {
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log.Printf("Stat Error: %v\n", err)
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return nil
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}
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var content string
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emails := make([]Email, count)
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for i := 1; i <= count; i++ {
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if content, err = client.Retr(i); err != nil {
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log.Printf("Retr Error: %v\n", err)
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return nil
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}
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emails[i-1] = parseEmail(content)
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}
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return emails
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}
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func (e *emailer) pop3all() []Email {
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conn := e.getConn(e.pop3Server)
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client, err := pop3.NewClient(conn)
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if err != nil {
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log.Fatalf("Dial Error: %v\n", err)
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}
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defer func() {
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client.Quit()
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client.Close()
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}()
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if err = client.User(e.from); err != nil {
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log.Printf("User Error: %v\n", err)
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return nil
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}
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if err = client.Pass(e.pwd); err != nil {
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log.Printf("Pass Error: %v\n", err)
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return nil
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}
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var count int
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var size uint64
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if count, size, err = client.Stat(); err != nil {
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log.Printf("Stat Error: %v\n", err)
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return nil
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}
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log.Printf("Count: %d, Size: %d\n", count, size)
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if count, size, err = client.List(6); err != nil {
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log.Printf("List Error: %v\n", err)
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return nil
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}
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log.Printf("Number: %d, Size: %d\n", count, size)
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var mis []pop3.MessageInfo
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if mis, err = client.ListAll(); err != nil {
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log.Printf("LAll Error: %v\n", err)
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return nil
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}
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for _, mi := range mis {
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log.Printf("Number: %d, Size: %d\n", mi.Number, mi.Size)
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}
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var number int
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var uid string
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if number, uid, err = client.Uidl(6); err != nil {
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log.Printf("Uidl Error: %v\n", err)
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return nil
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}
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log.Printf("Number: %d, Uid: %s\n", number, uid)
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if mis, err = client.UidlAll(); err != nil {
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log.Printf("UAll Error: %v\n", err)
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return nil
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}
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for _, mi := range mis {
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log.Printf("Number: %d, Uid: %s\n", mi.Number, mi.Uid)
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}
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var content string
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if content, err = client.Retr(8); err != nil {
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log.Printf("Retr Error: %v\n", err)
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return nil
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}
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log.Printf("Content:\n%s\n", content)
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/*
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if err = client.Dele(6); err != nil {
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log.Printf("Dele Error: %v\n", err)
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return nil
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}
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*/
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if err = client.Noop(); err != nil {
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log.Printf("Noop Error: %v\n", err)
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return nil
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}
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if err = client.Rset(); err != nil {
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log.Printf("Rset Error: %v\n", err)
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return nil
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}
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return nil
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}
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/*
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type Email struct {
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To string
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From string
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Date time.Time
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Subject string
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Body string
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}
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*/
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func parseEmail(content string) Email {
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To := regexp.MustCompile("\n[Tt]o: .*\n").FindString(content)
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To = strings.TrimSpace(To)
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To = strings.Trim(To, "TTo")
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To = strings.Trim(To, ": {}<>")
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Subject := regexp.MustCompile("\n[Ss]ubject: .*\n").FindString(content)
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Subject = strings.TrimSpace(Subject)
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Subject = strings.Trim(Subject, "SSubject")
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Subject = strings.Trim(Subject, ": ")
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when := regexp.MustCompile("[Dd]ate: .*\n").FindString(content)
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when = strings.Trim(when, "DDate")
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when = strings.Trim(when, ":")
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when = strings.TrimSpace(when)
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Date, err := time.Parse("Mon, 2 Jan 2006 15:04:05 -0700 (MST)", when)
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if err != nil {
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log.Println(err)
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}
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parseFrom := regexp.MustCompile("[^ ]*@[^ ]*")
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From := regexp.MustCompile("\n[Ff]rom: .*\n").FindString(content)
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From = strings.TrimSpace(From)
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From = parseFrom.FindString(From)
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From = strings.Trim(From, "<>{}")
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Body := ""
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Bodyarr := strings.Split(content, "\n")
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Body = Bodyarr[len(Bodyarr)-1]
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return Email{
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To: To,
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From: From,
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Date: Date,
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Subject: Subject,
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Body: Body,
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}
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}
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