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January 17, 2020 03:10
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Rails6 Redis Session Store (serializer by JSON)
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# -*- encoding : utf-8 -*- | |
Rails.application.config.session_store( | |
:redis_store, | |
key: "_#{Rails.application.class.parent_name.downcase}_session", | |
expire_after: 2.days, | |
threadsafe: true, | |
url: "redis://127.0.0.1:6379/8", | |
) | |
# Redis session store(serializer by JSON) for Rails 6 | |
# need redis / hiredis gem | |
module ActionDispatch | |
module Session | |
class RedisStore < AbstractSecureStore | |
def initialize(app, options = {}) | |
redis_options = { | |
driver: options[:driver] || :hiredis, | |
threadsafe: options.has_key?(:threadsafe) ? options[:threadsafe] : true, | |
} | |
if options.has_key?(:cluster) | |
redis_options[:cluster] = options[:cluster] | |
else | |
redis_options[:url] = options[:url] || "redis://127.0.0.1:6379/8" | |
end | |
@redis_client = Redis.new(redis_options) | |
@expire_in = options[:expire_after] || options[:expires_in] || 2.days | |
@namespace = options[:namespace] || options[:key] | |
super | |
end | |
# Get a session from the cache. | |
def find_session(env, sid) | |
unless sid && (session = get_session_with_fallback(sid)) | |
sid, session = generate_sid, {} | |
end | |
[sid, session] | |
end | |
# Set a session in the cache. | |
def write_session(env, sid, session, options) | |
key = cache_key(sid.private_id) | |
if session | |
@redis_client.set(key, JSON.dump(session), ex: @expire_in) | |
else | |
@redis_client.del(key) | |
end | |
sid | |
end | |
# Remove a session from the cache. | |
def delete_session(env, sid, options) | |
@redis_client.del(cache_key(sid.private_id)) | |
@redis_client.del(cache_key(sid.public_id)) | |
generate_sid | |
end | |
private | |
# Turn the session id into a cache key. | |
def cache_key(id) | |
"_#{@namespace}:session_id:#{id}" | |
end | |
def get_session_with_fallback(sid) | |
raw_data = @redis_client.get(cache_key(sid.private_id)) || @redis_client.get(cache_key(sid.public_id)) | |
return JSON.parse(raw_data) | |
end | |
end | |
end | |
end |
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