Process dynamic headers before making actual request

[ajitsing]

I had a requirement where I had to pass Request-ID header in all the http calls. So I tried using HTTParty.headers() method to achieve this. But while testing I realized that once the value is set in headers using HTTParty.headers(), it will remain as is.

But I want different behaviour where the value is evaluated every time the call is fired.

One idea is to accept block as header value which can be evaluated when the request is fired. I have solved it in my project by adding a patch to httparty. I thought it would be useful to others as well.

Example of dynamic header:

require 'rails_distributed_tracing'

class BaseApi
  include HTTParty
  headers DistributedTracing::REQUEST_HEADER_KEY => lambda {DistributedTracing.current_request_id}
end

Awaiting for suggestion and feedback.

[jnunemaker]

Hey! Thanks for contribution. I'm definitely going to review this but low on time right now. Know that I appreciate it and will do my best. Feel free to bug me if I haven't responded in a week or two.

[TheSmartnik]

What you want here is Enumerable#each_with_object. Resulting code will much cleaner than map + conversion to hash

[ajitsing]

@TheSmartnik thanks for the suggestion, changed the code accordingly.

[jnunemaker]

I like this idea.