Yes it appears HTTP servers should do case insensitive matches to headers by specification.

However it sort of appears by convention that HTTP libraries should not change case of headers that are specified to them.

Lesson learned: Never trust either end!

In reply to Re^3: Difference between LWP::UserAgent and AnyEvent::HTTP by sectokia
in thread Difference between LWP::UserAgent and AnyEvent::HTTP by sectokia

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