GAE/P：mail_stub.get_sent_messages 自 v 1.7.1 以来因非 ascii 而失败答案

【问题标题】：GAE/P: mail_stub.get_sent_messages fails with non-ascii since v 1.7.1GAE/P：mail_stub.get_sent_messages 自 v 1.7.1 以来因非 ascii 而失败
【发布时间】：2012-10-28 23:48:23
【问题描述】：

我的测试代码在 GAE 1.7.1 版开始失败。我回到 1.7.0 等待修复，但我的测试代码在 1.7.2 中仍然失败。这是导致失败的最小测试：

mail.send_mail("sender@example.com", "receiver@example.com", 
               u"sübject".encode("utf-8"), "body")
mail_list = self.mail_stub.get_sent_messages()

我收到以下错误：

Traceback (most recent call last):
  File "/Users/.../tests/unit_tests.py", line 19, in testTest
    mail_list = self.mail_stub.get_sent_messages()
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/apiproxy_stub.py", line 184, in WrappedMethod
    return method(self, *args, **kwargs)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/mail_stub.py", line 183, in get_sent_messages
    email_message = mail.EmailMessage(mime_message=mime_message)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/mail.py", line 742, in __init__
    self.update_from_mime_message(mime_message)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/mail.py", line 1213, in update_from_mime_message
    super(EmailMessage, self).update_from_mime_message(mime_message)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/mail.py", line 1093, in update_from_mime_message
    subject = _decode_and_join_header(mime_message['subject'], separator=u'')
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/mail.py", line 558, in _decode_and_join_header
    for s, c in email.header.decode_header(header))
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/mail.py", line 558, in <genexpr>
    for s, c in email.header.decode_header(header))
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 1: ordinal not in range(128)

如果我做错了什么或者这是 GAE 错误，您能告诉我吗？

【问题讨论】：

我不明白，你为什么对主题进行编码。您的 python 文件是否包含在前两行：#!/usr/bin/python # -- coding: utf-8 --
@voscausa，我的 Python 文件有编码行。我的理解是您需要对非 ascii 主题进行编码，而 GAE 不会为您这样做。
可以，但是你不发给外界，你发给Mail API。
@voscausa，这是对邮件 API 的调用。
但是使用 encode("utf-8" ) 您可以将其从 unicode 转换为 Mail API 的字节。见这篇文章：evanjones.ca/python-utf8.html

标签： python google-app-engine unicode

【解决方案1】：

在阅读了这个post 和这个page 之后，这似乎是正确的做法：

from email import header
mail.send_mail("sender@example.com", "receiver@example.com", 
               str(header.Header(u"sübject", "utf-8")), "body")

到目前为止，它对我有用。

【讨论】：