如何在Mailgun中使用python httplib2发送电子邮件附件

Question

我正在使用带有Mailgun API的httplib2发送电子邮件附件，该附件是我使用Google云端硬盘下载的，正在发送但没有附件..以下是我的代码。

DRIVE = discovery.build('drive', 'v3', http=http_auth)

        request = DRIVE.files().export_media(fileId=file_id, mimeType='application/pdf')

        fh = io.BytesIO()
        downloader = MediaIoBaseDownload(fh, request)

        done = False
        while done is False:
            status, done = downloader.next_chunk()
            logging.info("Download %d%%." % int(status.progress() * 100))

        messages = {
            "from": sender,
            "to": recipient,
            "subject": 'Attachment Mail from Mailgun',
            "text": 'Testing',
            "attachment": fh.getvalue()
        }

         url = URL

        data = {
            "from": messages['from'],
            "to": messages['to'],
            "subject": messages['subject'],
            "text": messages['text'],
            "attachment": messages['attachment']
        }

        pl = urllib.urlencode(data)

        http = httplib2.Http()
        http.add_credentials('api', API)

        resp, content = http.request(
            url, 'POST', pl,
            headers={"Content-Type": "application/x-www-form-urlencoded"})

Answer 1

我们使用mailgun API发送邮件使用Appengine和读取cloud storage ，同样的原则将适用于google drive ：

我建议的第一件事是调查StringIO 。 与BytesIO相比，它可以让您以更简单的方式模拟在appengine沙箱中使用文件的方式，但是两者都会产生python调用支持.read() file objects ，因此这两种方式都应适用。

将文件作为file like object的file like object ，只需将其正确传递给API。 以下示例使用了请求库，因为它使发布文件变得非常容易并且与appengine兼容。

请注意，在这种情况下， open(FILE_PATH_1, 'rb')是一个file like object的file like object ，您只需将其替换为您的文件对象：

def send_complex_message():
    return requests.post("https://api.mailgun.net/v2/DOMAIN/messages",
          auth=("api", "key-SECRET"),
          files={
              "attachment[0]": ("FileName1.ext", open(FILE_PATH_1, 'rb')),
              "attachment[1]": ("FileName2.ext", open(FILE_PATH_2, 'rb'))
          },
          data={"from": "FROM_EMAIL",
                "to": [TO_EMAIL],
                "subject": SUBJECT,
                "html": HTML_CONTENT
          })

Answer 2

def send_mailgun（收件人，主题，html，文件，文件名，cc，密件抄送）：

MAILGUN_URL =' https ://api.mailgun.net/v3/DOMAIN/messages'MAILGUN_KEY ='key-secret'

数据= {“主题”：主题，“来自”：“ FROM_EMAIL”，“至”：至，“ html”：html}

如果cc！=“”：data [“ cc”] = cc

如果密件抄送！=“”：data [“ bcc”] =密件抄送

如果file_name和file_name！=“”：resp = requests.post（MAILGUN_URL，auth =（“ api”，MAILGUN_KEY），files = [（“ attachment”，（file_name，file））]，data = data）否则：resp = requests.post（MAILGUN_URL，auth =（“ api”，MAILGUN_KEY），data = data）

Answer 3

不过，这已经很晚了……我很久以前解决了这个问题。

import io
import base64
from google.appengine.api import urlfetch
from libs.poster.encode import multipart_encode, MultipartParam

from oauth2client.appengine import AppAssertionCredentials
from googleapiclient.http import MediaIoBaseDownload
from apiclient.discovery import build
from httplib2 import Http

request = drive.files().export_media(fileId=spreadsheet_id, mimeType='application/pdf')

        fh = io.BytesIO()
        downloader = MediaIoBaseDownload(fh, request)

        done = False
        while done is False:
            status, done = downloader.next_chunk()

        message = {
            'from': 'noreply',
            'to': 'recipient',
            'subject': mail_subject,
            'text': text,
            'filename': filename,
            'attachment': fh.getvalue()
        }

        # send email using mailgun
        resp = send_attachment_email(message)


# Compose an email with an attachment
def send_attachment_email(messages):

url = 'mailgun_api_url'
api = 'api-key'

load = {
    "from": messages['from'],
    "to": messages['to'],
    "subject": messages['subject'],
    "text": messages['text'],
    "attachment": MultipartParam(
        "attachment",
        filename=messages['filename'],
        filetype='application/pdf',
        value=messages['attachment'])
}

payload, hd = multipart_encode(load)

hd['Authorization'] = 'Basic %s' % (base64.b64encode(api),)

resp = urlfetch.fetch(url=url, payload="".join(payload), method='POST',
                      headers=hd, validate_certificate=True)
logging.info(resp.status_code)
logging.info(resp.content)

return resp.status_code