Question

我一直试图弄清楚如何使用标准的net / smtp将二进制附件发送到我的Gmail帐户的电子邮件。到目前为止，我已经成功地成功附加了一个文本文件 - 以下内容（基于其他人所做的）适用于此：

#!/usr/bin/env ruby

require 'net/smtp'

addressee = 'NAME@EMAIL.COM'
server    = 'smtp.gmail.com'
port      = 587
account   = 'ACCOUNT'
from      = addressee
name      = 'NAME'
domain    = 'gmail.com'
subject   = 'test of smtp using ruby'
body      = 'Test of SMTP using Ruby.'
marker    = "PART_SEPARATOR"
filename  = "test-attachment"
filetext  = "attachment contents"

print "Enter password for #{account}: "
password  = $stdin.gets.chomp

# Define the main headers.
part1 = <<EOF
From: #{name} <#{from}>
To: <#{addressee}>
Subject: #{subject}
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary=#{marker}
--#{marker}
EOF

# Define the message action
part2 = <<EOF
Content-Type: text/plain
Content-Transfer-Encoding:8bit

#{body}
--#{marker}
EOF

# Define the attachment section
part3 = <<EOF
Content-Type: text/plain
Content-Disposition: attachment; filename="#{File.basename(filename)}"

#{filetext}
--#{marker}--
EOF

message = part1 + part2 + part3

puts message

smtp = Net::SMTP.new server, port
smtp.enable_starttls

smtp.start(domain, account, password, :login) do
  smtp.send_message message, from, addressee
end

问题是用编码的二进制附件替换文本附件。上面的以下变体看起来应该基于我能够谷歌，但不能正确发送附件：

#!/usr/bin/env ruby

require 'net/smtp'

addressee = 'NAME@EMAIL.COM'
server    = 'smtp.gmail.com'
port      = 587
account   = 'ACCOUNT'
from      = addressee
name      = 'NAME'
domain    = 'gmail.com'
subject   = 'test of smtp using ruby'
body      = 'Test of SMTP using Ruby.'
marker    = "PART_SEPARATOR"
filename  = "test-attachment"
filetext  = "attachment contents"

print "Enter password for #{account}: "
password  = $stdin.gets.chomp

# Encode contents into base64 format
encodedcontent = [filetext].pack("m")

# Define the main headers.
part1 = <<EOF
From: #{name} <#{from}>
To: <#{addressee}>
Subject: #{subject}
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary=#{marker}
--#{marker}
EOF

# Define the message action
part2 = <<EOF
Content-Type: text/plain
Content-Transfer-Encoding:8bit

#{body}
--#{marker}
EOF

# Define the attachment section
part3 = <<EOF
Content-Type: multipart/mixed; name="#{File.basename(filename)}"
Content-Transfer-Encoding:base64
Content-Disposition: attachment; filename="#{File.basename(filename)}"

#{encodedcontent}
--#{marker}--
EOF

message = part1 + part2 + part3

puts message

smtp = Net::SMTP.new server, port
smtp.enable_starttls

smtp.start(domain, account, password, :login) do
  smtp.send_message message, from, addressee
end

谁能告诉我我做错了什么？

Answer 1

我终于设法发送二进制附件 - 秘密是使用

Content-Type: application/octet-stream; name="#{filename}"
Content-Disposition: attachment; filename="#{filename}"; size=#{size}

在邮件的附件部分（第3部分）中。

另一件事，这适用于小型测试附件，但当我尝试更大的（140K）附件时，附件被截断。使用

filecontent = File.binread(pathname)

而不是

filecontent = File.read(pathname)

似乎解决了这个问题。（我不太清楚为什么。）

使用ruby net / smtp发送带附件的电子邮件

1 个答案: