ed74f2f245
* This change abstracts the DatadogStatsClient into a ForemStatsClient. The purpose of this abstraction is to set the foundation for a subsequent PR that will allow one to use New Relic for recording Forem stats, instead of Datadog, if there is a New Relic configuration found. This specific change creates an abstraction layer that can be built upon, without changing any actual default behavior. All specs still pass. * Use delegate instead of explicit methods. * Delegate instead of explicit methods. * Fix the error. * Refactor according to the suggestions in the comments. * Ooops. Stats work better when all of the code is committed. * Removing the alias of count to increment since that was done in error.
47 lines
1.9 KiB
Ruby
47 lines
1.9 KiB
Ruby
module EdgeCache
|
|
class Bust
|
|
class Nginx
|
|
def self.call(path)
|
|
return unless nginx_available?
|
|
|
|
uri = URI.parse("#{ApplicationConfig['OPENRESTY_URL']}#{path}")
|
|
http = Net::HTTP.new(uri.host, uri.port)
|
|
response = http.request Net::HTTP::Purge.new(uri.request_uri)
|
|
|
|
raise StandardError, "Nginx Purge request failed: #{response.body}" unless response.is_a?(Net::HTTPSuccess)
|
|
|
|
response.body
|
|
end
|
|
|
|
def self.nginx_available?
|
|
# TODO: (Vaidehi Joshi) - Right now, we are checking that nginx is
|
|
# available on every purge request/call to this bust service. If we are going
|
|
# to bust multiple paths, we should be able to check that nginx is
|
|
# available just once, and persist it on the class with @provider_available?.
|
|
# Then, we could allow for an array of @paths = [] to be passed in,
|
|
# and on single bust instance could bust multiple paths in order.
|
|
uri = URI.parse(ApplicationConfig["OPENRESTY_URL"])
|
|
http = Net::HTTP.new(uri.host, uri.port)
|
|
response = http.get(uri.request_uri)
|
|
|
|
return true if response.is_a?(Net::HTTPSuccess)
|
|
rescue StandardError
|
|
# If we can't connect to OpenResty, alert ourselves that
|
|
# it is unavailable and return false.
|
|
Rails.logger.error("Could not connect to OpenResty via #{ApplicationConfig['OPENRESTY_URL']}!")
|
|
ForemStatsClient.increment("edgecache_bust.service_unavailable",
|
|
tags: ["path:#{ApplicationConfig['OPENRESTY_URL']}"])
|
|
false
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
# Creates our own purge method for an HTTP request,
|
|
# which is used by Nginx to bust a cache.
|
|
# See Net::HTTPGenericRequest for attributes/methods.
|
|
class Net::HTTP::Purge < Net::HTTPRequest # rubocop:disable Style/ClassAndModuleChildren
|
|
METHOD = "PURGE".freeze
|
|
REQUEST_HAS_BODY = false
|
|
RESPONSE_HAS_BODY = true
|
|
end
|