Ensure proxy passed in X-Upstream-Https-Proxy is parsable

[gauthamw-stripe]

Description

Ensure that the https proxy passed in X-Upstream-Https-Proxy can be parsed before proceeding.

Testing Details

curl --proxy-header "X-Upstream-Https-Proxy: google.com:443" --proxytunnel -x localhost:4750 https://example3.com

Logs:

{"destination_host":"example3.com","error":"proxy header contains invalid URL. The correct format is https://[username:password@]my.proxy.srv:12345","kind":"parse_failure","level":"error","msg":"Unable to parse X-Upstream-Https-Proxy header.","role":"","time":"2024-09-05T01:57:45+05:30","upstream_proxy_name":"google.com:443"}

[coveralls]

Pull Request Test Coverage Report for Build 10709127600

Details

• 3 of 3 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.6%) to 62.494%

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Totals
Change from base Build 9899373120:	0.6%
Covered Lines:	1318
Relevant Lines:	2109

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💛 - Coveralls

[jjiang-stripe]

lgtm! thanks for fixing the tests too!