| import re |
|
|
| from django.conf import settings |
| from django.http import HttpResponsePermanentRedirect |
| from django.utils.deprecation import MiddlewareMixin |
|
|
|
|
| class SecurityMiddleware(MiddlewareMixin): |
| def __init__(self, get_response): |
| super().__init__(get_response) |
| self.sts_seconds = settings.SECURE_HSTS_SECONDS |
| self.sts_include_subdomains = settings.SECURE_HSTS_INCLUDE_SUBDOMAINS |
| self.sts_preload = settings.SECURE_HSTS_PRELOAD |
| self.content_type_nosniff = settings.SECURE_CONTENT_TYPE_NOSNIFF |
| self.redirect = settings.SECURE_SSL_REDIRECT |
| self.redirect_host = settings.SECURE_SSL_HOST |
| self.redirect_exempt = [re.compile(r) for r in settings.SECURE_REDIRECT_EXEMPT] |
| self.referrer_policy = settings.SECURE_REFERRER_POLICY |
| self.cross_origin_opener_policy = settings.SECURE_CROSS_ORIGIN_OPENER_POLICY |
|
|
| def process_request(self, request): |
| path = request.path.lstrip("/") |
| if ( |
| self.redirect |
| and not request.is_secure() |
| and not any(pattern.search(path) for pattern in self.redirect_exempt) |
| ): |
| host = self.redirect_host or request.get_host() |
| return HttpResponsePermanentRedirect( |
| "https://%s%s" % (host, request.get_full_path()) |
| ) |
|
|
| def process_response(self, request, response): |
| if ( |
| self.sts_seconds |
| and request.is_secure() |
| and "Strict-Transport-Security" not in response |
| ): |
| sts_header = "max-age=%s" % self.sts_seconds |
| if self.sts_include_subdomains: |
| sts_header += "; includeSubDomains" |
| if self.sts_preload: |
| sts_header += "; preload" |
| response.headers["Strict-Transport-Security"] = sts_header |
|
|
| if self.content_type_nosniff: |
| response.headers.setdefault("X-Content-Type-Options", "nosniff") |
|
|
| if self.referrer_policy: |
| |
| |
| response.headers.setdefault( |
| "Referrer-Policy", |
| ",".join( |
| [v.strip() for v in self.referrer_policy.split(",")] |
| if isinstance(self.referrer_policy, str) |
| else self.referrer_policy |
| ), |
| ) |
|
|
| if self.cross_origin_opener_policy: |
| response.setdefault( |
| "Cross-Origin-Opener-Policy", |
| self.cross_origin_opener_policy, |
| ) |
| return response |
|
|
