Adding code
This commit is contained in:
scs
201
main.go
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201
main.go
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package scsusers
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import (
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"bytes"
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"database/sql"
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"fmt"
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"github.com/jmoiron/sqlx"
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"golang.org/x/crypto/bcrypt"
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"html/template"
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"log"
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"math/rand"
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"net/smtp"
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"strings"
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)
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type templates struct {
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Registration *template.Template
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Alert *template.Template
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Recovery *template.Template
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}
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type config struct {
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SiteName string
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FromEmail string
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Templates templates
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db *sqlx.DB
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TablePrefix string
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}
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var c config
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func Init(dbin *sqlx.DB, tp, sitename, fromaddr string) {
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c.db = dbin
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c.TablePrefix = tp
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c.SiteName = sitename
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c.FromEmail = fromaddr
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SetRegistrationTemplate("")
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SetAlertTemplate("")
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SetRecoveryTemplate("")
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}
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func UsernameAvailable(username string) bool {
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q := fmt.Sprintf("select username from %s_auth where username=$1", c.TablePrefix)
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err := c.db.Get(q, username)
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if err == sql.ErrNoRows {
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return true
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}
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return false
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}
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/* Check for username availability, add to database, send email */
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func Register(username, email, ip string) bool {
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if !UsernameAvailable(username) {
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return false
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}
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pass := randBytes(16)
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crypt, err := bcrypt.GenerateFromPassword(pass, 20)
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if err != nil {
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log.Printf("Bcrypt GenerateFromPassword failed? Pass is %s and error is %s\n", pass, err.Error())
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return false
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}
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q := fmt.Sprintf("insert into %s_auth (username, email, password, registration_date, registration_ip) values ($1, $2, $3, NOW(), $4)", c.TablePrefix)
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_, err = c.db.Exec(q, username, email, crypt, ip)
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if err != nil {
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return false
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}
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return true
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}
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func randBytes(n int) []byte {
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const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
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b := make([]byte, n)
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for i := range b {
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b[i] = letterBytes[rand.Intn(len(letterBytes))]
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}
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return b
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}
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func sendRegistrationEmail(recipient, username, password string) bool {
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data := struct {
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SiteName string
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FromEmail string
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UserName string
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Pass string
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}{
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SiteName: c.SiteName,
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FromEmail: c.FromEmail,
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UserName: username,
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Pass: password,
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}
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var body bytes.Buffer
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err := c.Templates.Registration.Execute(&body, data)
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if err != nil {
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log.Printf("Registration template failed to execute: %v returned %s\n", data, err.Error())
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return false
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}
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subject := fmt.Sprintf("Welcome to %s", c.SiteName)
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err = SendMail("localhost:25", c.FromEmail, subject, body.String(), recipient)
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if err != nil {
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log.Printf("Error sending mail to %s: %s\n", recipient, err.Error())
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return false
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}
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return true
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}
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func SetRegistrationTemplate(t string) bool {
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if len(t) != 0 {
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r, err := template.New("reg").Parse(t)
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if err != nil {
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c.Templates.Registration = r
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return true
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}
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}
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df := `<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html></head><body><p>Hello {{.UserName}}! Welcome to {{.SiteName}}! We've created your account with the username you selected and the following password: {{.Pass}}<br>You can change your password to whatever you want once you log in.</p></body></html>`
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r, err := template.New("reg").Parse(df)
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if err != nil {
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log.Fatal("Default registration template MUST compile. Error: " + err.Error())
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}
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c.Templates.Registration = r
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return false
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}
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func SetAlertTemplate(t string) bool {
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if len(t) != 0 {
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r, err := template.New("alert").Parse(t)
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if err != nil {
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c.Templates.Alert = r
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return true
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}
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}
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df := `<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html></head><body><p> Hello {{.UserName}}! Just letting you know that {{.Activity}}.<br> You can disable future notifications in your user settings.</p></body></html>`
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r, err := template.New("alert").Parse(df)
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if err != nil {
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log.Fatal("Default alert template MUST compile. Error: " + err.Error())
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}
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c.Templates.Alert = r
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return false
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}
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func SetRecoveryTemplate(t string) bool {
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if len(t) != 0 {
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r, err := template.New("recovery").Parse(t)
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if err != nil {
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c.Templates.Recovery = r
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return true
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}
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}
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df := `<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html></head><body><p>Hello {{.UserName}}! Someone (hopefully you) has attempted an account recovery agt {{.SiteName}}. If this was you, enter the following code to regain access: {{.RecoveryCode}}<br> If this was not you, you can ignore this email.</p></body></html>`
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r, err := template.New("recovery").Parse(df)
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if err != nil {
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log.Fatal("Default alert template MUST compile. Error: " + err.Error())
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}
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c.Templates.Recovery = r
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return false
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}
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func SendMail(addr, from, subject, body string, to string) error {
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r := strings.NewReplacer("\r\n", "", "\r", "", "\n", "", "%0a", "", "%0d", "")
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c, err := smtp.Dial(addr)
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if err != nil {
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return err
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}
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defer c.Close()
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if err = c.Mail(r.Replace(from)); err != nil {
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return err
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}
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to = r.Replace(to)
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if err = c.Rcpt(to); err != nil {
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return err
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}
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w, err := c.Data()
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if err != nil {
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return err
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}
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msg := "To: " + to + "\r\n" +
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"From: " + from + "\r\n" +
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"Subject: " + subject + "\r\n" +
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"Content-Type: text/html; charset=\"UTF-8\"\r\n" +
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"\r\n" + body
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_, err = w.Write([]byte(msg))
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if err != nil {
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return err
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}
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err = w.Close()
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if err != nil {
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return err
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}
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return c.Quit()
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}
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15
templates/registration.html
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15
templates/registration.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html>
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</head>
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<body>
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<p>
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Hello {{.UserName}}! Welcome to {{.SiteName}}! We've created your account with the username you selected and the following password: {{.Pass}}<br>
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You can change your password to whatever you want once you log in.
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</p>
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</body>
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</html>
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