Add http_proxy and https_proxy to params.

[kaitoy]

This enhance enables to pass http_proxy and https_proxy options to lua-resty-openidc and use a proxy for communication with OIDC provider.

[coveralls]

Pull Request Test Coverage Report for Build 145

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.6%) to 95.652%

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Files with Coverage Reduction	New Missed Lines	%
./kong/plugins/oidc/utils.lua	1	98.55%

Totals
Change from base Build 134:	-0.6%
Covered Lines:	132
Relevant Lines:	138

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💛 - Coveralls

[fischerdr]

Are the above diffs all that is needed to get oidc plugin to go through a application proxy?

[kaitoy]

Yes, we're using these changes in our production environment.

[fischerdr]

So an issue that I have is if the proxy requires auth. when I add username and password into the proxy line it messes up the call.
for some reason it thinks the username is the short name of the host and fails
url : http://:@proxy.example.com:8080
I was looking thru the source of the lua-resty-openidc
and could not see where to add proxy auth variables

[kaitoy]

I think you can use http_proxy_authorization and https_proxy_authorization. (ref. https://github.com/ledgetech/lua-resty-http#set_proxy_options)
I will try it.

[fischerdr]

Thanks! That worked. now i need to figure how to if/then the variables so it doesn't alway include them

[kaitoy]

I'm creating a commit to add http_proxy_authorization and https_proxy_authorization options.

[kaitoy]

I added the options for proxy auth and confirmed they work as expected.