使用Amazon-SES、芹菜任务从Django发送带有附件的电子邮件

Question

我正在试着发送带有附件的电子邮件。我得到IOError: Errno 2没有这样的文件或目录。但是它说的URL并不存在？好吧，它确实存在。表单正在上传文件，当我在另一个窗口中调用它时，它生成的、末尾附加了Signature=...&Expires=...&AWSAccessKeyId=的FileField.url可以正常工作。

我的Django应用程序使用Amazon-SES。我用send_mail()很好地发送了它们，但是那个包装器不支持附件，所以我在我的tasks.py中切换到了这个：

from django.core.mail.message import EmailMessage
from celery import task
import logging
from apps.profiles.models import Client

@task(name='send-email')
def send_published_article(sender, subject, body, attachment):
    recipients = []
    for client in Client.objects.all():
        recipients.append(client.email)
    email = EmailMessage(subject, body, sender, [recipients])
    email.attach_file(attachment)
    email.send()

在我的视图中，我在form.save()上调用它

from story.tasks import send_published_article
def add_article(request):
    if request.method == 'POST':
        form = ArticleForm(request.POST, request.FILES or None)
        if form.is_valid():
            article = form.save(commit=False)
            article.author = request.user
            article.save()
            if article.is_published:
                subject = article.title
                body = article.text
                attachment = article.docfile.url
                send_published_article.delay(request.user.email,
                                             subject,
                                             body,
                                             attachment)
            return redirect(article)
    else:
        form = ArticleForm()
    return render_to_response('story/article_form.html', 
                              { 'form': form },
                              context_instance=RequestContext(request))

日志是这样写的：

app/celeryd.1: File "/app/.heroku/python/lib/python2.7/site-packages/django/core/mail/message.py", line 268, in attach_file 
app/celeryd.1: content = open(path, 'rb').read() 
app/celeryd.1: IOError: [Errno 2] No such file or directory:

任何

Answer 1

编辑#2 --如果要使用.read()函数，文件模式需要为'r‘。

原因是“没有这样的文件或目录”是因为我忘记使用default_storage.open()。该文件与应用程序不在同一台计算机上，静态文件存储在亚马逊网络服务S3上。

from celery import task
from django.core.mail.message import EmailMessage
from django.core.files.storage import default_storage
from apps.account.models import UserProfile

@task(name='send-email')
def send_published_article(sender, subject, body, attachment=None):
    recipients = []
    for profile in UserProfile.objects.all():
        if profile.user_type == 'Client':
            recipients.append(profile.user.email)
    email = EmailMessage(subject, body, sender, recipients)
    try:
        docfile = default_storage.open(attachment.name, 'r')
        if docfile:
            email.attach(docfile.name, docfile.read())
        else:
            pass
    except:
        pass
    email.send()

Answer 2

附件必须是文件系统上的文件，请在Django e-mail documentation中搜索attach_file。

因此，您可以链接到电子邮件中的文件(URL)，也可以下载该文件，将其附加，然后在本地删除。