enabling proxy to cache on low bandwidth transfered images

[Reimar Bauer]

current implementation of owslib .urlopen needs a feature proxy

Another option is to look at https://mapproxy.org/ https://mapproxy.org/docs/nightly/sources.html#forward-req-params Currently this feature only works with uncached sources.

[Reimar Bauer]

the proxy url has to become set by e.g. requests https://stackoverflow.com/questions/5620263/using-an-http-proxy-python

[Reimar Bauer]

seems we can do this by a prepared-requests, because owslib.utils.urlopen is based on requests

http://docs.python-requests.org/en/master/user/advanced/#prepared-requests

[Reimar Bauer]

Merged in ReimarBauer/mss/proxy (pull request #345)

feature for enabling a Proxy Web Server like squid, fixes #188

Approved-by: Joern Ungermann [e-mail]

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