headers modified after res.serve() are never written to response about iron HOT 4 CLOSED

This is a limitation from rust-http, which requires that all headers be written before any of the body. If you look at the source, the headers are flushed when any of the body is first written, and are then never written again.

I think there is some documentation of this in the cookie module, but you're right in that it should be more clear. Feel free to add to the documentation, or we will get to it soon.

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Yes, unfortunately once you have written to the body you can no longer write any headers. Until we get around to creating our own abstraction layer over rust-http's Request objects or switch to a new backend this isn't something we can support. :/

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We should really have some sort of error mechanism for detecting this case and warning you, so that it doesn't just silently fail.

from iron.

+1 for abstraction. Would love to see this feature. :)

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