在Python中给邮件附加文件时文件名为空？

Question

下面这段代码运行得很好，唯一的问题就是发到邮件里的附件文件名是空的（在 Gmail 中打开时显示为 'noname'）。我哪里出错了呢？

file_name = RecordingUrl.split("/")[-1]
            file_name=file_name+ ".wav"
            urlretrieve(RecordingUrl, file_name)

            # Create the container (outer) email message.
            msg = MIMEMultipart()
            msg['Subject'] = 'New feedback from %s (%a:%a)' % (
From, int(RecordingDuration) / 60, int(RecordingDuration) % 60)

            msg['From'] = "noreply@example.info"
            msg['To'] = 'user@gmail.com'
            msg.preamble = msg['Subject']                
            file = open(file_name, 'rb')
            audio = MIMEAudio(file.read())
            file.close()
            msg.attach(audio)

            # Send the email via our own SMTP server.
            s = smtplib.SMTP()
            s.connect()
            s.sendmail(msg['From'], msg['To'], msg.as_string())
            s.quit()

Answer 1

你需要在消息的音频部分添加一个叫做 Content-Disposition header 的东西，这可以通过add_header 方法来实现：

file = open(file_name, 'rb')
audio = MIMEAudio(file.read())
file.close()
audio.add_header('Content-Disposition', 'attachment', filename=file_name)
msg.attach(audio)