mirror of
https://github.com/beego/bee.git
synced 2025-07-05 08:00:18 +00:00
add vendor
This commit is contained in:
astaxie
423
vendor/github.com/astaxie/beego/utils/mail.go
generated
vendored
Normal file
423
vendor/github.com/astaxie/beego/utils/mail.go
generated
vendored
Normal file
@ -0,0 +1,423 @@
|
||||
// Copyright 2014 beego Author. All Rights Reserved.
|
||||
//
|
||||
// Licensed under the Apache License, Version 2.0 (the "License");
|
||||
// you may not use this file except in compliance with the License.
|
||||
// You may obtain a copy of the License at
|
||||
//
|
||||
// http://www.apache.org/licenses/LICENSE-2.0
|
||||
//
|
||||
// Unless required by applicable law or agreed to in writing, software
|
||||
// distributed under the License is distributed on an "AS IS" BASIS,
|
||||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
// See the License for the specific language governing permissions and
|
||||
// limitations under the License.
|
||||
|
||||
package utils
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"encoding/base64"
|
||||
"encoding/json"
|
||||
"errors"
|
||||
"fmt"
|
||||
"io"
|
||||
"mime"
|
||||
"mime/multipart"
|
||||
"net/mail"
|
||||
"net/smtp"
|
||||
"net/textproto"
|
||||
"os"
|
||||
"path"
|
||||
"path/filepath"
|
||||
"strconv"
|
||||
"strings"
|
||||
"sync"
|
||||
)
|
||||
|
||||
const (
|
||||
maxLineLength = 76
|
||||
|
||||
upperhex = "0123456789ABCDEF"
|
||||
)
|
||||
|
||||
// Email is the type used for email messages
|
||||
type Email struct {
|
||||
Auth smtp.Auth
|
||||
Identity string `json:"identity"`
|
||||
Username string `json:"username"`
|
||||
Password string `json:"password"`
|
||||
Host string `json:"host"`
|
||||
Port int `json:"port"`
|
||||
From string `json:"from"`
|
||||
To []string
|
||||
Bcc []string
|
||||
Cc []string
|
||||
Subject string
|
||||
Text string // Plaintext message (optional)
|
||||
HTML string // Html message (optional)
|
||||
Headers textproto.MIMEHeader
|
||||
Attachments []*Attachment
|
||||
ReadReceipt []string
|
||||
}
|
||||
|
||||
// Attachment is a struct representing an email attachment.
|
||||
// Based on the mime/multipart.FileHeader struct, Attachment contains the name, MIMEHeader, and content of the attachment in question
|
||||
type Attachment struct {
|
||||
Filename string
|
||||
Header textproto.MIMEHeader
|
||||
Content []byte
|
||||
}
|
||||
|
||||
// NewEMail create new Email struct with config json.
|
||||
// config json is followed from Email struct fields.
|
||||
func NewEMail(config string) *Email {
|
||||
e := new(Email)
|
||||
e.Headers = textproto.MIMEHeader{}
|
||||
err := json.Unmarshal([]byte(config), e)
|
||||
if err != nil {
|
||||
return nil
|
||||
}
|
||||
return e
|
||||
}
|
||||
|
||||
// Bytes Make all send information to byte
|
||||
func (e *Email) Bytes() ([]byte, error) {
|
||||
buff := &bytes.Buffer{}
|
||||
w := multipart.NewWriter(buff)
|
||||
// Set the appropriate headers (overwriting any conflicts)
|
||||
// Leave out Bcc (only included in envelope headers)
|
||||
e.Headers.Set("To", strings.Join(e.To, ","))
|
||||
if e.Cc != nil {
|
||||
e.Headers.Set("Cc", strings.Join(e.Cc, ","))
|
||||
}
|
||||
e.Headers.Set("From", e.From)
|
||||
e.Headers.Set("Subject", e.Subject)
|
||||
if len(e.ReadReceipt) != 0 {
|
||||
e.Headers.Set("Disposition-Notification-To", strings.Join(e.ReadReceipt, ","))
|
||||
}
|
||||
e.Headers.Set("MIME-Version", "1.0")
|
||||
|
||||
// Write the envelope headers (including any custom headers)
|
||||
if err := headerToBytes(buff, e.Headers); err != nil {
|
||||
return nil, fmt.Errorf("Failed to render message headers: %s", err)
|
||||
}
|
||||
|
||||
e.Headers.Set("Content-Type", fmt.Sprintf("multipart/mixed;\r\n boundary=%s\r\n", w.Boundary()))
|
||||
fmt.Fprintf(buff, "%s:", "Content-Type")
|
||||
fmt.Fprintf(buff, " %s\r\n", fmt.Sprintf("multipart/mixed;\r\n boundary=%s\r\n", w.Boundary()))
|
||||
|
||||
// Start the multipart/mixed part
|
||||
fmt.Fprintf(buff, "--%s\r\n", w.Boundary())
|
||||
header := textproto.MIMEHeader{}
|
||||
// Check to see if there is a Text or HTML field
|
||||
if e.Text != "" || e.HTML != "" {
|
||||
subWriter := multipart.NewWriter(buff)
|
||||
// Create the multipart alternative part
|
||||
header.Set("Content-Type", fmt.Sprintf("multipart/alternative;\r\n boundary=%s\r\n", subWriter.Boundary()))
|
||||
// Write the header
|
||||
if err := headerToBytes(buff, header); err != nil {
|
||||
return nil, fmt.Errorf("Failed to render multipart message headers: %s", err)
|
||||
}
|
||||
// Create the body sections
|
||||
if e.Text != "" {
|
||||
header.Set("Content-Type", fmt.Sprintf("text/plain; charset=UTF-8"))
|
||||
header.Set("Content-Transfer-Encoding", "quoted-printable")
|
||||
if _, err := subWriter.CreatePart(header); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
// Write the text
|
||||
if err := quotePrintEncode(buff, e.Text); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
if e.HTML != "" {
|
||||
header.Set("Content-Type", fmt.Sprintf("text/html; charset=UTF-8"))
|
||||
header.Set("Content-Transfer-Encoding", "quoted-printable")
|
||||
if _, err := subWriter.CreatePart(header); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
// Write the text
|
||||
if err := quotePrintEncode(buff, e.HTML); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
if err := subWriter.Close(); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
// Create attachment part, if necessary
|
||||
for _, a := range e.Attachments {
|
||||
ap, err := w.CreatePart(a.Header)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
// Write the base64Wrapped content to the part
|
||||
base64Wrap(ap, a.Content)
|
||||
}
|
||||
if err := w.Close(); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return buff.Bytes(), nil
|
||||
}
|
||||
|
||||
// AttachFile Add attach file to the send mail
|
||||
func (e *Email) AttachFile(args ...string) (a *Attachment, err error) {
|
||||
if len(args) < 1 && len(args) > 2 {
|
||||
err = errors.New("Must specify a file name and number of parameters can not exceed at least two")
|
||||
return
|
||||
}
|
||||
filename := args[0]
|
||||
id := ""
|
||||
if len(args) > 1 {
|
||||
id = args[1]
|
||||
}
|
||||
f, err := os.Open(filename)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
ct := mime.TypeByExtension(filepath.Ext(filename))
|
||||
basename := path.Base(filename)
|
||||
return e.Attach(f, basename, ct, id)
|
||||
}
|
||||
|
||||
// Attach is used to attach content from an io.Reader to the email.
|
||||
// Parameters include an io.Reader, the desired filename for the attachment, and the Content-Type.
|
||||
func (e *Email) Attach(r io.Reader, filename string, args ...string) (a *Attachment, err error) {
|
||||
if len(args) < 1 && len(args) > 2 {
|
||||
err = errors.New("Must specify the file type and number of parameters can not exceed at least two")
|
||||
return
|
||||
}
|
||||
c := args[0] //Content-Type
|
||||
id := ""
|
||||
if len(args) > 1 {
|
||||
id = args[1] //Content-ID
|
||||
}
|
||||
var buffer bytes.Buffer
|
||||
if _, err = io.Copy(&buffer, r); err != nil {
|
||||
return
|
||||
}
|
||||
at := &Attachment{
|
||||
Filename: filename,
|
||||
Header: textproto.MIMEHeader{},
|
||||
Content: buffer.Bytes(),
|
||||
}
|
||||
// Get the Content-Type to be used in the MIMEHeader
|
||||
if c != "" {
|
||||
at.Header.Set("Content-Type", c)
|
||||
} else {
|
||||
// If the Content-Type is blank, set the Content-Type to "application/octet-stream"
|
||||
at.Header.Set("Content-Type", "application/octet-stream")
|
||||
}
|
||||
if id != "" {
|
||||
at.Header.Set("Content-Disposition", fmt.Sprintf("inline;\r\n filename=\"%s\"", filename))
|
||||
at.Header.Set("Content-ID", fmt.Sprintf("<%s>", id))
|
||||
} else {
|
||||
at.Header.Set("Content-Disposition", fmt.Sprintf("attachment;\r\n filename=\"%s\"", filename))
|
||||
}
|
||||
at.Header.Set("Content-Transfer-Encoding", "base64")
|
||||
e.Attachments = append(e.Attachments, at)
|
||||
return at, nil
|
||||
}
|
||||
|
||||
// Send will send out the mail
|
||||
func (e *Email) Send() error {
|
||||
if e.Auth == nil {
|
||||
e.Auth = smtp.PlainAuth(e.Identity, e.Username, e.Password, e.Host)
|
||||
}
|
||||
// Merge the To, Cc, and Bcc fields
|
||||
to := make([]string, 0, len(e.To)+len(e.Cc)+len(e.Bcc))
|
||||
to = append(append(append(to, e.To...), e.Cc...), e.Bcc...)
|
||||
// Check to make sure there is at least one recipient and one "From" address
|
||||
if len(to) == 0 {
|
||||
return errors.New("Must specify at least one To address")
|
||||
}
|
||||
|
||||
// Use the username if no From is provided
|
||||
if len(e.From) == 0 {
|
||||
e.From = e.Username
|
||||
}
|
||||
|
||||
from, err := mail.ParseAddress(e.From)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// use mail's RFC 2047 to encode any string
|
||||
e.Subject = qEncode("utf-8", e.Subject)
|
||||
|
||||
raw, err := e.Bytes()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
return smtp.SendMail(e.Host+":"+strconv.Itoa(e.Port), e.Auth, from.Address, to, raw)
|
||||
}
|
||||
|
||||
// quotePrintEncode writes the quoted-printable text to the IO Writer (according to RFC 2045)
|
||||
func quotePrintEncode(w io.Writer, s string) error {
|
||||
var buf [3]byte
|
||||
mc := 0
|
||||
for i := 0; i < len(s); i++ {
|
||||
c := s[i]
|
||||
// We're assuming Unix style text formats as input (LF line break), and
|
||||
// quoted-printble uses CRLF line breaks. (Literal CRs will become
|
||||
// "=0D", but probably shouldn't be there to begin with!)
|
||||
if c == '\n' {
|
||||
io.WriteString(w, "\r\n")
|
||||
mc = 0
|
||||
continue
|
||||
}
|
||||
|
||||
var nextOut []byte
|
||||
if isPrintable(c) {
|
||||
nextOut = append(buf[:0], c)
|
||||
} else {
|
||||
nextOut = buf[:]
|
||||
qpEscape(nextOut, c)
|
||||
}
|
||||
|
||||
// Add a soft line break if the next (encoded) byte would push this line
|
||||
// to or past the limit.
|
||||
if mc+len(nextOut) >= maxLineLength {
|
||||
if _, err := io.WriteString(w, "=\r\n"); err != nil {
|
||||
return err
|
||||
}
|
||||
mc = 0
|
||||
}
|
||||
|
||||
if _, err := w.Write(nextOut); err != nil {
|
||||
return err
|
||||
}
|
||||
mc += len(nextOut)
|
||||
}
|
||||
// No trailing end-of-line?? Soft line break, then. TODO: is this sane?
|
||||
if mc > 0 {
|
||||
io.WriteString(w, "=\r\n")
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// isPrintable returns true if the rune given is "printable" according to RFC 2045, false otherwise
|
||||
func isPrintable(c byte) bool {
|
||||
return (c >= '!' && c <= '<') || (c >= '>' && c <= '~') || (c == ' ' || c == '\n' || c == '\t')
|
||||
}
|
||||
|
||||
// qpEscape is a helper function for quotePrintEncode which escapes a
|
||||
// non-printable byte. Expects len(dest) == 3.
|
||||
func qpEscape(dest []byte, c byte) {
|
||||
const nums = "0123456789ABCDEF"
|
||||
dest[0] = '='
|
||||
dest[1] = nums[(c&0xf0)>>4]
|
||||
dest[2] = nums[(c & 0xf)]
|
||||
}
|
||||
|
||||
// headerToBytes enumerates the key and values in the header, and writes the results to the IO Writer
|
||||
func headerToBytes(w io.Writer, t textproto.MIMEHeader) error {
|
||||
for k, v := range t {
|
||||
// Write the header key
|
||||
_, err := fmt.Fprintf(w, "%s:", k)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
// Write each value in the header
|
||||
for _, c := range v {
|
||||
_, err := fmt.Fprintf(w, " %s\r\n", c)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// base64Wrap encodes the attachment content, and wraps it according to RFC 2045 standards (every 76 chars)
|
||||
// The output is then written to the specified io.Writer
|
||||
func base64Wrap(w io.Writer, b []byte) {
|
||||
// 57 raw bytes per 76-byte base64 line.
|
||||
const maxRaw = 57
|
||||
// Buffer for each line, including trailing CRLF.
|
||||
var buffer [maxLineLength + len("\r\n")]byte
|
||||
copy(buffer[maxLineLength:], "\r\n")
|
||||
// Process raw chunks until there's no longer enough to fill a line.
|
||||
for len(b) >= maxRaw {
|
||||
base64.StdEncoding.Encode(buffer[:], b[:maxRaw])
|
||||
w.Write(buffer[:])
|
||||
b = b[maxRaw:]
|
||||
}
|
||||
// Handle the last chunk of bytes.
|
||||
if len(b) > 0 {
|
||||
out := buffer[:base64.StdEncoding.EncodedLen(len(b))]
|
||||
base64.StdEncoding.Encode(out, b)
|
||||
out = append(out, "\r\n"...)
|
||||
w.Write(out)
|
||||
}
|
||||
}
|
||||
|
||||
// Encode returns the encoded-word form of s. If s is ASCII without special
|
||||
// characters, it is returned unchanged. The provided charset is the IANA
|
||||
// charset name of s. It is case insensitive.
|
||||
// RFC 2047 encoded-word
|
||||
func qEncode(charset, s string) string {
|
||||
if !needsEncoding(s) {
|
||||
return s
|
||||
}
|
||||
return encodeWord(charset, s)
|
||||
}
|
||||
|
||||
func needsEncoding(s string) bool {
|
||||
for _, b := range s {
|
||||
if (b < ' ' || b > '~') && b != '\t' {
|
||||
return true
|
||||
}
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
// encodeWord encodes a string into an encoded-word.
|
||||
func encodeWord(charset, s string) string {
|
||||
buf := getBuffer()
|
||||
|
||||
buf.WriteString("=?")
|
||||
buf.WriteString(charset)
|
||||
buf.WriteByte('?')
|
||||
buf.WriteByte('q')
|
||||
buf.WriteByte('?')
|
||||
|
||||
enc := make([]byte, 3)
|
||||
for i := 0; i < len(s); i++ {
|
||||
b := s[i]
|
||||
switch {
|
||||
case b == ' ':
|
||||
buf.WriteByte('_')
|
||||
case b <= '~' && b >= '!' && b != '=' && b != '?' && b != '_':
|
||||
buf.WriteByte(b)
|
||||
default:
|
||||
enc[0] = '='
|
||||
enc[1] = upperhex[b>>4]
|
||||
enc[2] = upperhex[b&0x0f]
|
||||
buf.Write(enc)
|
||||
}
|
||||
}
|
||||
buf.WriteString("?=")
|
||||
|
||||
es := buf.String()
|
||||
putBuffer(buf)
|
||||
return es
|
||||
}
|
||||
|
||||
var bufPool = sync.Pool{
|
||||
New: func() interface{} {
|
||||
return new(bytes.Buffer)
|
||||
},
|
||||
}
|
||||
|
||||
func getBuffer() *bytes.Buffer {
|
||||
return bufPool.Get().(*bytes.Buffer)
|
||||
}
|
||||
|
||||
func putBuffer(buf *bytes.Buffer) {
|
||||
if buf.Len() > 1024 {
|
||||
return
|
||||
}
|
||||
buf.Reset()
|
||||
bufPool.Put(buf)
|
||||
}
|
||||
Reference in New Issue
Block a user