Oskar K. Oskar K. - 5 months ago 10
Ruby Question

How to log an entire request (headers, body, etc) for a certain url?

I need to log all the requests including HTTP headers, bodies, etc to a certain url. I've tried this code:

def index
global_request_logging
end

private

def global_request_logging
http_request_header_keys = request.headers.keys.select{|header_name| header_name.match("^HTTP.*")}
http_request_headers = request.headers.select{|header_name, header_value| http_request_header_keys.index(header_name)}
logger.info "Received #{request.method.inspect} to #{request.url.inspect} from #{request.remote_ip.inspect}. Processing with headers #{http_request_headers.inspect} and params #{params.inspect}"
begin
yield
ensure
logger.info "Responding with #{response.status.inspect} => #{response.body.inspect}"
end
end


But it said
request.headers
doesn't contain a method named
keys
. Also I figure there should be an easier way or standard to do it. Preferably, not to use a gem.

Answer

request.headers looks like it returns a hash, but in fact it returns a Http::Headers object that doesn't have a keys method defined.

But a Http::Headers responds to env which returns the original env hash. Therefore something like this should be work:

http_request_header_keys = request.headers.env.keys.select do |header_name| 
  header_name.match("^HTTP.*")
end

Or you could just iterate over all key value pairs and copy them into another hash:

http_envs = {}.tap do |envs|
  request.headers.each do |key, value|
    envs[key] = value if key.downcase.starts_with?('http')
  end
end

logger.info <<-LOG.squish
  Received     #{request.method.inspect} 
  to           #{request.url.inspect} 
  from         #{request.remote_ip.inspect}.  
  Processing 
  with headers #{http_envs.inspect} 
  and params   #{params.inspect}"
LOG

To wrap this up:

around_action :log_everything, only: :index

def index
  # ...
end

private
def log_everything
  log_headers
  yield
ensure
  log_response
end

def log_headers
  http_envs = {}.tap do |envs|
    request.headers.each do |key, value|
      envs[key] = value if key.downcase.starts_with?('http')
    end
  end

  logger.info "Received #{request.method.inspect} to #{request.url.inspect} from #{request.remote_ip.inspect}. Processing with headers #{http_envs.inspect} and params #{params.inspect}"
end

def log_response
  logger.info "Responding with #{response.status.inspect} => #{response.body.inspect}"
end