Rails：使用带有附件的 Gmail API 发送电子邮件，仅返回编码文件，不返回

Question

我正在尝试使用 gmail API 发送电子邮件。如下所示，我的 Ruby 代码在没有附件的情况下运行良好：

client = google_client user_id
token = Token.find_by_user_id(user_id)
access_token = token.access_token
gmail = Google::Apis::GmailV1::GmailService.new
gmail.authorization = client
message              = Mail.new
message.date         = Time.now
message.subject      = 'Supertram p'
message.body         = "<p>Hi Alex, how's life?</p>"
message.content_type = 'text/html'
message.from         = self.email
message.to           = 'email_name@gmail.com'

msg = message.encoded
message_object = Google::Apis::GmailV1::Message.new(raw:message.to_s)
gmail.send_user_message('me', message_object)

我能够成功发送 html 格式的电子邮件。 我的问题是如何将文件附加到此邮件？

client = google_client user_id
token = Token.find_by_user_id(user_id)
access_token = token.access_token
gmail = Google::Apis::GmailV1::GmailService.new
gmail.authorization = client
message              = Mail.new
message.date         = Time.now
message.subject      = 'Supertramp'
message.body         = "<p>Hi Alex, how's life?</p>"
# message.content_type = 'text/html'
message.from         = self.email
message.to           = 'myemail@gmail.com'
message.add_file("/Users/myname/Downloads/image.png")

msg = message.encoded
message_object = Google::Apis::GmailV1::Message.new(raw:message.to_s)
gmail.send_user_message('me', message_object)

但这是我收到的消息：

-- 内容类型：文本/纯文本； charset=UTF-8 Content-Transfer-Encoding: 7bit Hi Alex，你好吗？

-- 内容类型: image/png; filename=image.png 内容传输编码：base64 内容处置：附件； 文件名=image.png 内容 ID： iVBORw0KGgoAAAANSUhEUgAAAfAAAABMCAYAAACS0+VcAAAX9UlEQVR4Ae2d XWxj1bXH/6lKK+D1VE1oKEa6CPNwpQh4SFBapYOrIoGUuRnN6IRR25HuC1C/ AC8JDMiFGTlP8 [...] == ----

我只收到一个编码字符串，但没有收到附件。 我的问题是如何通过 Gmail API 发送带有附件的电子邮件？

Answer 1

我认为您在附件方面缺少一些东西

message              = Mail.new
message.date         = Time.now
message.subject      = 'Test Email'
message.body         = "<p>Hi Test, how's life?</p>"
message.content_type = 'text/html'
message.from         = "Test User <userone@example.com>"
message.to           = 'usertwo@example.com'

service = client.discovered_api('gmail', 'v1')

result = client.execute(
  api_method: service.users.messages.to_h['gmail.users.messages.send'],
  body_object: {
    raw: Base64.urlsafe_encode64(message.to_s)
  },
  parameters:  {
    userId: 'userone@example.com'
  },
    headers:   { 'Content-Type' => 'application/json' }
)

response = JSON.parse(result.body)

对于带有附件的多部分电子邮件：

message         = Mail.new
message.date    = Time.now
message.subject = 'Supertramp'
message.from    = "testone <userone@example.com>"
message.to      = 'testtwo@example.com'

message.part content_type: 'multipart/alternative' do |part|
  part.html_part = Mail::Part.new(body: "<p>Hi TEst, how's life?</p>", content_type: 'text/html; charset=UTF-8')
  part.text_part = Mail::Part.new(body: "Hi test, how's life?")
end

open('http://google.com/image.jpg') do |file| 
  message.attachments['image.jpg'] = file.read 
end