python - 即使在设置 LANG 和 LC_ALL 后，在 mod_wsgi 中运行时也会出现 UnicodeEncodeError

Question

我得到一个 UnicodeEncodeError从我的应用程序打印 unicode 字符串时出错。它通过 AWS 上的 Elastic Beanstalk (Apache + mod_wsgi) 运行。我找到了 this很有用，当我打电话时 locale.getdefaultlocale()和 locale.getpreferredencoding()我收到 None和 ASCII .

我设置了LANG和 LC_ALL至 en_US.UTF-8 (通过 WSGIDaemonProcess 指令和环境变量)。现在当我打电话时 locale.getdefaultlocale()和 locale.getpreferredencoding() , 我得到 ('en_US', 'UTF-8')和 UTF-8 .但是，我仍然得到相同的 UnicodeEncodeError .
sys.stdout类型为 mod_wsgi.Log .我找不到有关如何检查/设置此编码的任何详细信息。

我不确定此时如何继续调试。我该如何解决这个错误？

这个 wsgi.conf 是 Elastic Beanstalk 的默认设置，除了我添加的地方 lang和 locale到 WSGIDaemonProcess 指令。

LoadModule wsgi_module modules/mod_wsgi.so
WSGIPythonHome /opt/python/run/baselinenv
WSGISocketPrefix run/wsgi
WSGIRestrictEmbedded On

<VirtualHost *:80>
    Alias /static/ /opt/python/current/app/static/

    <Directory /opt/python/current/app/static/>
        Order allow,deny
        Allow from all
    </Directory>

    WSGIScriptAlias / /opt/python/current/app/application.py

    <Directory /opt/python/current/app/>
        Require all granted
    </Directory>

    WSGIDaemonProcess wsgi processes=1 threads=15 lang='en_US.UTF-8' locale='en_US.UTF-8' display-name=%{GROUP} python-path=/opt/python/current/app:/opt/python/run/venv/lib/python2.7/site-packages user=wsgi group=wsgi home=/opt/python/current/app
    WSGIProcessGroup wsgi
</VirtualHost>

追溯:

ERROR:discotech:Exception on /venues [GET]
Traceback (most recent call last):
  File "/opt/python/run/venv/lib/python2.7/site-packages/flask/app.py", line 1817, in wsgi_app
    response = self.full_dispatch_request()
  File "/opt/python/run/venv/lib/python2.7/site-packages/flask/app.py", line 1477, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/opt/python/run/venv/lib/python2.7/site-packages/flask_cors/extension.py", line 110, in wrapped_function
    return cors_after_request(app.make_response(f(*args, **kwargs)))
  File "/opt/python/run/venv/lib/python2.7/site-packages/flask/app.py", line 1381, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/opt/python/run/venv/lib/python2.7/site-packages/flask/app.py", line 1475, in full_dispatch_request
    rv = self.dispatch_request()
  File "/opt/python/run/venv/lib/python2.7/site-packages/flask/app.py", line 1461, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/opt/python/current/app/discotech/api/venue.py", line 32, in get_venues
    print "TEST = %s", test
UnicodeEncodeError: 'ascii' codec can't encode character u'\\xe1' in position 1: ordinal not in range(128)

这是我用来练习它的代码:

# -*- coding: utf-8 -*-

...

@api_app.route('/venues')
def get_venues():
    test = u"Ián"
    print "TEST =", test

Answer 1

我遵循了@kchomski 的建议并编辑了 /etc/apache2/envvars :

## Uncomment the following line to use the system default locale instead:
. /etc/default/locale

最后一行被注释了，我取消了注释。现在我的 WSGI 脚本正在使用 en_US.UTF-8语言环境，一切正常!