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New cache system using proxy_cache_bypass

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Instead of using ngx_cache_purge which was buggy, we are trying
proxy_cache_bypass, which is internal to nginx. This is A Good Thing
(assuming it works), because when we call HEAD on the purge item, it
also warms the cache for us, which the previous system did not do. We
want newly updated files to cache warm, because they are expected to be
used quickly.
This commit is contained in:
Kyle Drake 2015-07-27 15:44:34 -07:00
parent 0f0baa78ff
commit 7bd2ad6b51
2 changed files with 17 additions and 16 deletions
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26
tests/workers/purge_cache_worker_tests.rb
View file

@ -6,8 +6,8 @@ describe PurgeCacheWorker do
end
it 'throws exception without 200 or 404 http status' do
stub_request(:get, "http://#{@test_ip}/:cache/purge/test.jpg").
with(headers: {'Host' => 'kyledrake.neocities.org'})
stub_request(:head, "http://#{@test_ip}/test.jpg").
with(headers: {'Host' => 'kyledrake.neocities.org', 'Cache-Purge' => '1'})
.to_return(status: 503)
worker = PurgeCacheWorker.new
@ -18,8 +18,8 @@ describe PurgeCacheWorker do
end
it 'handles 404 without exception' do
stub_request(:get, "http://#{@test_ip}/:cache/purge/test.jpg").
with(headers: {'Host' => 'kyledrake.neocities.org'})
stub_request(:head, "http://#{@test_ip}/test.jpg").
with(headers: {'Host' => 'kyledrake.neocities.org', 'Cache-Purge' => '1'})
.to_return(status: 404)
worker = PurgeCacheWorker.new
@ -27,35 +27,35 @@ describe PurgeCacheWorker do
end
it 'sends a purge request' do
stub_request(:get, "http://#{@test_ip}/:cache/purge/test.jpg").
with(headers: {'Host' => 'kyledrake.neocities.org'})
stub_request(:head, "http://#{@test_ip}/test.jpg").
with(headers: {'Host' => 'kyledrake.neocities.org', 'Cache-Purge' => '1'})
.to_return(status: 200)
worker = PurgeCacheWorker.new
worker.perform @test_ip, 'kyledrake', '/test.jpg'
assert_requested :get, "http://#{@test_ip}/:cache/purge/test.jpg"
assert_requested :head, "http://#{@test_ip}/test.jpg"
end
it 'handles spaces correctly' do
stub_request(:get, "http://#{@test_ip}/:cache/purge/te st.jpg").
with(headers: {'Host' => 'kyledrake.neocities.org'})
stub_request(:head, "http://#{@test_ip}/te st.jpg").
with(headers: {'Host' => 'kyledrake.neocities.org', 'Cache-Purge' => '1'})
.to_return(status: 200)
url = Addressable::URI.encode_component(
"http://#{@test_ip}/:cache/purge/te st.jpg",
"http://#{@test_ip}/te st.jpg",
Addressable::URI::CharacterClasses::QUERY
)
worker = PurgeCacheWorker.new
worker.perform @test_ip, 'kyledrake', '/te st.jpg'
assert_requested :get, url
assert_requested :head, url
end
it 'works without forward slash' do
stub_request(:get, "http://#{@test_ip}/:cache/purge/test.jpg").
with(headers: {'Host' => 'kyledrake.neocities.org'})
stub_request(:head, "http://#{@test_ip}/test.jpg").
with(headers: {'Host' => 'kyledrake.neocities.org', 'Cache-Purge' => '1'})
.to_return(status: 200)
worker = PurgeCacheWorker.new

7
workers/purge_cache_worker.rb
View file

@ -15,12 +15,13 @@ class PurgeCacheWorker
path = '/' + path if path[0] != '/'
url = Addressable::URI.encode_component(
"http://#{proxy_ip}/:cache/purge#{path}",
"http://#{proxy_ip}#{path}",
Addressable::URI::CharacterClasses::QUERY
)
begin
RestClient::Request.execute method: :get, url: url, timeout: HTTP_TIMEOUT, headers: {
host: URI::encode("#{username}.neocities.org")
RestClient::Request.execute method: :head, url: url, timeout: HTTP_TIMEOUT, headers: {
host: URI::encode("#{username}.neocities.org"),
cache_purge: '1'
}
rescue RestClient::ResourceNotFound
end