mirror of
https://github.com/unknwon/the-way-to-go_ZH_CN.git
synced 2025-08-11 23:52:31 +08:00
83 lines
2.2 KiB
Markdown
83 lines
2.2 KiB
Markdown
# 15.12 用 smtp 发送邮件
|
||
|
||
`smtp` 包实现了用于发送邮件的“简单邮件传输协议”（Simple Mail Transfer Protocol）。它有一个 `Client` 类型，代表一个连接到 SMTP 服务器的客户端：
|
||
|
||
- `Dial` 方法返回一个已连接到 SMTP 服务器的客户端 `Client`
|
||
- 设置 `Mail`（from，即发件人）和 `Rcpt`（to，即收件人）
|
||
- `Data` 方法返回一个用于写入数据的 `Writer`，这里利用 `buf.WriteTo(wc)` 写入
|
||
|
||
示例 15.26 [smtp.go](examples/chapter_15/smtp.go)
|
||
```go
|
||
package main
|
||
|
||
import (
|
||
"bytes"
|
||
"log"
|
||
"net/smtp"
|
||
)
|
||
|
||
func main() {
|
||
// Connect to the remote SMTP server.
|
||
client, err := smtp.Dial("mail.example.com:25")
|
||
if err != nil {
|
||
log.Fatal(err)
|
||
}
|
||
// Set the sender and recipient.
|
||
client.Mail("sender@example.org")
|
||
client.Rcpt("recipient@example.net")
|
||
// Send the email body.
|
||
wc, err := client.Data()
|
||
if err != nil {
|
||
log.Fatal(err)
|
||
}
|
||
defer wc.Close()
|
||
buf := bytes.NewBufferString("This is the email body.")
|
||
if _, err = buf.WriteTo(wc); err != nil {
|
||
log.Fatal(err)
|
||
}
|
||
}
|
||
```
|
||
|
||
如果需要认证，或有多个收件人时，也可以用 `SendMail` 函数发送。它连接到地址为 `addr` 的服务器；如果可以，切换到 TLS（“传输层安全”加密和认证协议），并用 PLAIN 机制认证；然后以 `from` 作为发件人，`to` 作为收件人列表，`msg` 作为邮件内容，发出一封邮件：
|
||
```go
|
||
func SendMail(addr string, a Auth, from string, to []string, msg []byte) error
|
||
```
|
||
|
||
示例 15.27 [smtp_auth.go](examples/chapter_15/smtp_auth.go)
|
||
```go
|
||
package main
|
||
|
||
import (
|
||
"log"
|
||
"net/smtp"
|
||
)
|
||
|
||
func main() {
|
||
// Set up authentication information.
|
||
auth := smtp.PlainAuth(
|
||
"",
|
||
"user@example.com",
|
||
"password",
|
||
"mail.example.com",
|
||
)
|
||
// Connect to the server, authenticate, set the sender and recipient,
|
||
// and send the email all in one step.
|
||
err := smtp.SendMail(
|
||
"mail.example.com:25",
|
||
auth,
|
||
"sender@example.org",
|
||
[]string{"recipient@example.net"},
|
||
[]byte("This is the email body."),
|
||
)
|
||
if err != nil {
|
||
log.Fatal(err)
|
||
}
|
||
}
|
||
```
|
||
|
||
## 链接
|
||
|
||
- [目录](directory.md)
|
||
- 上一节：[与 websocket 通信](15.11.md)
|
||
- 下一章：[常见的陷阱与错误](16.0.md)
|