55 lines
1.9 KiB
Python
55 lines
1.9 KiB
Python
import requests
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from django.conf import settings
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from django.core.exceptions import PermissionDenied
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from django.http import HttpResponse
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from django.views.generic import View
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class MapProxyView(View):
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"""
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Proxy for KortForsyningen map service. Created so we can show maps without
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leaking the IP of our visitors.
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"""
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def get(self, *args, **kwargs):
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"""
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Before we make the request we check that the path is in our whitelist.
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Before we return the response we copy headers except for a list we dont want.
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"""
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# only permit certain paths
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path = self.request.path.replace("/maps/kfproxy", "", 1)
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if path not in ["/orto_foraar", "/topo_skaermkort", "/mat", "/dhm"]:
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raise PermissionDenied("No thanks")
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# ok, get the full path including querystring, and add our token
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fullpath = self.request.get_full_path().replace("/maps/kfproxy", "", 1)
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fullpath += f"&token={settings.KORTFORSYNINGEN_TOKEN}"
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# make the request
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r = requests.get("https://services.kortforsyningen.dk" + fullpath)
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# make the response
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response = HttpResponse(r.content, status=r.status_code)
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# list of headers that cause trouble when proxying
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excluded_headers = [
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"connection",
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"content-encoding",
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"content-length",
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"keep-alive",
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"proxy-authenticate",
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"proxy-authorization",
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"te",
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"trailers",
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"transfer-encoding",
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"upgrade",
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]
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# proxy all headers from our upstream request to the response to our client,
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# if the headers are not in our list of troublemakers
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for key, value in r.headers.items():
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if key.lower() not in excluded_headers:
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response[key] = value
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# all good, return the response
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return response
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