在Flask中突变request.base_url [英] Mutating request.base_url in Flask
问题描述
我有一个Flask应用程序,负载平衡终止SSL。我有代码,检测SSL使用时,并改变请求对象:
pre $ app $ be $ request
def before_request():
x_forwarded_proto = request.headers.get('X-Forwarded-Proto')
if x_forwarded_proto =='https':
request.url = request.url.replace ('http://','https://')
request.url_root = request.url_root.replace('http://','https://')
request.host_url = request.host_url.replace('http://','https://')
然后,我有一个蓝图视图功能:
admin = Blueprint('admin',__name__,url_prefix ='/ admin')
@ admin.route('/ login')
def login():
print request.url
这个函数的输出是(当我去/ admin / login时)始终是http://而不是https://(尽管它应该在 before_request
函数。
关于如何解决这个问题的任何想法?
结果请求
是一个代理对象。我不确定内部结构,但每次导入都会重置。我通过继承 Request
class ProxiedRequest(Request):
def __init __(self,environ,populate_request = True,shallow = False):
super(Request,self).__ init __(environ,populate_request,shallow)
#支持SSL终止。如果SSL终止,则将Flask中的host_url变为使用https://
#。
x_forwarded_proto = self.headers.get('X-Forwarded-Proto')
if x_forwarded_proto =='https':
self.url = self.url.replace('http:/ /','https://')
self.host_url = self.host_url.replace('http://','https://')
self.base_url = self.base_url。 replace('http://','https://')
self.url_root = self.url_root.replace('http://','https://')
app = Flask(__ name__);
app.request_class = ProxiedRequest
I have a Flask application behind a Load balance that terminates SSL. I have code that "detects" when SSL is being used and mutates the request object:
@app.before_request
def before_request():
x_forwarded_proto = request.headers.get('X-Forwarded-Proto')
if x_forwarded_proto == 'https':
request.url = request.url.replace('http://', 'https://')
request.url_root = request.url_root.replace('http://', 'https://')
request.host_url = request.host_url.replace('http://', 'https://')
I then have a blueprint view function:
admin = Blueprint('admin', __name__, url_prefix='/admin')
@admin.route('/login')
def login():
print request.url
The output of this function is (when I go to /admin/login) is always http:// instead of https:// (even though it should have been mutated in the before_request
function.
Any ideas on how I can fix this?
Turns out request
is a proxied object. I'm not sure of the internals but it's "reset" on each import. I solved the issue by subclassing Request
class ProxiedRequest(Request):
def __init__(self, environ, populate_request=True, shallow=False):
super(Request, self).__init__(environ, populate_request, shallow)
# Support SSL termination. Mutate the host_url within Flask to use https://
# if the SSL was terminated.
x_forwarded_proto = self.headers.get('X-Forwarded-Proto')
if x_forwarded_proto == 'https':
self.url = self.url.replace('http://', 'https://')
self.host_url = self.host_url.replace('http://', 'https://')
self.base_url = self.base_url.replace('http://', 'https://')
self.url_root = self.url_root.replace('http://', 'https://')
app = Flask(__name__);
app.request_class = ProxiedRequest
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