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