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https://github.com/benbusby/farside.git
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8042dcad0c
The name of the project is being refactored from Privacy Revolver to Farside. The reasoning behind this is: 1. A shorter name is easier to remember 2. It can stand for "FOSS alternative redirecting service" (which I know doesn't encapsulate all letters from "farside", but it's close enough). This commit also includes improvements to the update script for determining how far along the script is.
87 lines
2.1 KiB
Elixir
87 lines
2.1 KiB
Elixir
defmodule Service do
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defstruct [
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type: nil,
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test_url: nil,
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fallback: nil,
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instances: []
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]
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end
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defmodule Instances do
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@fallback_str Application.fetch_env!(:farside, :fallback_str)
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@update_file Application.fetch_env!(:farside, :update_file)
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@services_json Application.fetch_env!(:farside, :services_json)
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def init() do
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File.rename(@update_file, "#{@update_file}-prev")
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update(@services_json)
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end
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def request(url) do
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case HTTPoison.get(url) do
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{:ok, %HTTPoison.Response{status_code: 200}} ->
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# TODO: Add validation of results, not just status code
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:good
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_ ->
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:bad
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end
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end
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def update(filename) do
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{:ok, file} = File.read(filename)
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{:ok, json} = Poison.decode(file, as: [%Service{}])
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# Loop through all instances and check each for availability
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for service <- json do
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IO.puts "======== " <> service.type
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result = Enum.filter(service.instances, fn(instance_url) ->
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IO.puts " " <> instance_url
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request(instance_url <> service.test_url) == :good
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end)
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add_to_redis(service, result)
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log_results(service.type, result)
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end
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end
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def add_to_redis(service, instances) do
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IO.puts " --------"
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IO.inspect "OK: " <> instances
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# Remove previous list of instances
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Redix.command(:redix, [
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"DEL",
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service.type
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])
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# Update with new list of available instances
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Redix.command(:redix, [
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"LPUSH",
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service.type
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] ++ instances)
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# Set fallback to one of the available instances,
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# or the default instance if all are "down"
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if Enum.count(instances) > 0 do
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Redix.command(:redix, [
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"SET",
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"#{service.type}#{@fallback_str}",
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Enum.random(instances)
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])
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else
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Redix.command(:redix, [
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"SET",
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"#{service.type}#{@fallback_str}",
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service.fallback
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])
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end
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end
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def log_results(service_name, results) do
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{:ok, file} = File.open(@update_file, [:append, {:delayed_write, 100, 20}])
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IO.write(file, "#{service_name}: #{inspect(results)}\n")
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File.close(file)
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end
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end
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Instances.init()
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