def load_meta(path, locale): meta = dict() meta_path = os.path.join(path, "meta.yaml") if os.path.isfile(meta_path): import yaml try: with open(meta_path) as f: meta = yaml.safe_load(f) except: pass else: import datetime if "last_update" in meta and isinstance(meta["last_update"], datetime.datetime): meta["last_update"] = (meta["last_update"] - datetime.datetime(1970,1,1)).total_seconds() l = Locale.parse(locale) meta["locale"] = locale meta["locale_display"] = l.display_name meta["locale_english"] = l.english_name return meta
def init_app(app):
babel = Babel(app)
app.config['LANGUAGES'] = {}
for language in app.config['SUPPORTED_LANGUAGES']:
app.config['LANGUAGES'][
language] = Locale.parse(language).language_name
@app.after_request
def call_after_request_callbacks(response):
for callback in getattr(g, 'after_request_callbacks', ()):
callback(response)
return response
def after_this_request(f):
if not hasattr(g, 'after_request_callbacks'):
g.after_request_callbacks = []
g.after_request_callbacks.append(f)
return f
@babel.localeselector
def get_locale():
supported_languages = app.config['SUPPORTED_LANGUAGES']
language_arg = request.args.get('l')
if language_arg is not None:
if language_arg in supported_languages:
@after_this_request
def remember_language(response):
response.set_cookie('language', language_arg)
return language_arg
else:
language_cookie = request.cookies.get('language')
if language_cookie in supported_languages:
return language_cookie
return request.accept_languages.best_match(supported_languages)
def load_meta(path, locale):
meta = dict()
meta_path = os.path.join(path, "meta.yaml")
if os.path.isfile(meta_path):
import yaml
try:
with open(meta_path) as f:
meta = yaml.safe_load(f)
except:
pass
else:
import datetime
if "last_update" in meta and isinstance(
meta["last_update"], datetime.datetime):
meta["last_update"] = (
meta["last_update"] -
datetime.datetime(1970, 1, 1)).total_seconds()
l = Locale.parse(locale)
meta["locale"] = locale
meta["locale_display"] = l.display_name
meta["locale_english"] = l.english_name
return meta
def get_best_locale_name(locale_names):
"""Select the best matching locale from `locale_names` according to
current request.
The locales are evaluated according to the language, script and territory.
If no best choice is found, fallback to ``config.DEFAULT_LOCALE``.
Moreover, if even ``config.DEFAULT_LOCALE`` does not appear in
`locale_names`, choose the last item in `locale_names`.
Usage:
.. code-block:: python
# If current user prefers zh-CN, or zh-TW.
>>> get_best_locale_name(['zh-cn', 'en'])
'zh-cn'
# If current user prefers en-US.
>>> get_best_locale_name(['zh-cn', 'en'])
'en'
# If current user prefers ja-JP, and default locale is zh-CN.
>>> get_best_locale_name(['zh-cn', 'en'])
'zh-cn'
# If current user prefers ja-JP, and default locale is zh-CN.
>>> get_best_locale_name(['fr', 'en'])
'en'
:param locale_names: List of alternative locale names.
:type locale_names: :class:`list`
:return: The best matching or fallback locale name.
:rtype: :class:`str`
"""
top_score = 0
top_name = None
req_locale = get_locale()
for name in locale_names:
l = Locale.parse(name.replace('-', '_'))
# If locale object is the same, return True at once
if l == req_locale:
return name
# If language not match, give up this locale
if l.language != req_locale.language:
continue
# Exam the matched score
score = 0
# script match, give 5
if l.script == req_locale.script:
score += 5
# territory match, give 3
if l.territory == req_locale.territory:
score += 3
# variant match, give 3
# TODO: check these score weights
if l.variant == req_locale.variant:
score += 3
# Update top_name if > top_score
if score > top_score:
top_name = name
top_score = score
# Fallback to default locale or last locale
if top_name is None:
if app.config['DEFAULT_LOCALE'] in locale_names:
top_name = app.config['DEFAULT_LOCALE']
else:
top_name = locale_names[-1]
return top_name
def get_best_locale_name(locale_names):
"""Select the best matching locale from `locale_names` according to
current request.
The locales are evaluated according to the language, script and territory.
If no best choice is found, fallback to ``config.DEFAULT_LOCALE``.
Moreover, if even ``config.DEFAULT_LOCALE`` does not appear in
`locale_names`, choose the last item in `locale_names`.
Usage:
.. code-block:: python
# If current user prefers zh-CN, or zh-TW.
>>> get_best_locale_name(['zh-cn', 'en'])
'zh-cn'
# If current user prefers en-US.
>>> get_best_locale_name(['zh-cn', 'en'])
'en'
# If current user prefers ja-JP, and default locale is zh-CN.
>>> get_best_locale_name(['zh-cn', 'en'])
'zh-cn'
# If current user prefers ja-JP, and default locale is zh-CN.
>>> get_best_locale_name(['fr', 'en'])
'en'
:param locale_names: List of alternative locale names.
:type locale_names: :class:`list`
:return: The best matching or fallback locale name.
:rtype: :class:`str`
"""
top_score = 0
top_name = None
req_locale = get_locale()
for name in locale_names:
l = Locale.parse(name.replace('-', '_'))
# If locale object is the same, return True at once
if l == req_locale:
return name
# If language not match, give up this locale
if l.language != req_locale.language:
continue
# Exam the matched score
score = 0
# script match, give 5
if l.script == req_locale.script:
score += 5
# territory match, give 3
if l.territory == req_locale.territory:
score += 3
# variant match, give 3
# TODO: check these score weights
if l.variant == req_locale.variant:
score += 3
# Update top_name if > top_score
if score > top_score:
top_name = name
top_score = score
# Fallback to default locale or last locale
if top_name is None:
if app.config['DEFAULT_LOCALE'] in locale_names:
top_name = app.config['DEFAULT_LOCALE']
else:
top_name = locale_names[-1]
return top_name
