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Merge pull request #214 from Leeingnyo/feature/http-cache

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HTTP cache for thumbnails, pages, dimensions
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Alex Ling 2021-08-18 07:37:21 +08:00 committed by GitHub
commit 29923f6dc7
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1 changed files with 38 additions and 7 deletions
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45
src/routes/api.cr
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@ -1,6 +1,7 @@
require "../mangadex/*"
require "../upload"
require "koa"
require "digest"
struct APIRouter
@@api_json : String?
@ -75,12 +76,14 @@ struct APIRouter
Koa.path "page", schema: Int32, desc: "The page number to return (starts from 1)"
Koa.response 200, schema: Bytes, media_type: "image/*"
Koa.response 500, "Page not found or not readable"
Koa.response 304, "Page not modified (only available when `If-None-Match` is set)"
Koa.tag "reader"
get "/api/page/:tid/:eid/:page" do |env|
begin
tid = env.params.url["tid"]
eid = env.params.url["eid"]
page = env.params.url["page"].to_i
prev_e_tag = env.request.headers["If-None-Match"]?
title = Library.default.get_title tid
raise "Title ID `#{tid}` not found" if title.nil?
@ -90,7 +93,15 @@ struct APIRouter
raise "Failed to load page #{page} of " \
"`#{title.title}/#{entry.title}`" if img.nil?
send_img env, img
e_tag = Digest::SHA1.hexdigest img.data
if prev_e_tag == e_tag
env.response.status_code = 304
""
else
env.response.headers["ETag"] = e_tag
env.response.headers["Cache-Control"] = "public, max-age=86400"
send_img env, img
end
rescue e
Logger.error e
env.response.status_code = 500
@ -102,12 +113,14 @@ struct APIRouter
Koa.path "tid", desc: "Title ID"
Koa.path "eid", desc: "Entry ID"
Koa.response 200, schema: Bytes, media_type: "image/*"
Koa.response 304, "Page not modified (only available when `If-None-Match` is set)"
Koa.response 500, "Page not found or not readable"
Koa.tag "library"
get "/api/cover/:tid/:eid" do |env|
begin
tid = env.params.url["tid"]
eid = env.params.url["eid"]
prev_e_tag = env.request.headers["If-None-Match"]?
title = Library.default.get_title tid
raise "Title ID `#{tid}` not found" if title.nil?
@ -118,7 +131,14 @@ struct APIRouter
raise "Failed to get cover of `#{title.title}/#{entry.title}`" \
if img.nil?
send_img env, img
e_tag = Digest::SHA1.hexdigest img.data
if prev_e_tag == e_tag
env.response.status_code = 304
""
else
env.response.headers["ETag"] = e_tag
send_img env, img
end
rescue e
Logger.error e
env.response.status_code = 500
@ -631,21 +651,32 @@ struct APIRouter
"height" => Int32,
}],
}
Koa.response 304, "Not modified (only available when `If-None-Match` is set)"
get "/api/dimensions/:tid/:eid" do |env|
begin
tid = env.params.url["tid"]
eid = env.params.url["eid"]
prev_e_tag = env.request.headers["If-None-Match"]?
title = Library.default.get_title tid
raise "Title ID `#{tid}` not found" if title.nil?
entry = title.get_entry eid
raise "Entry ID `#{eid}` of `#{title.title}` not found" if entry.nil?
sizes = entry.page_dimensions
send_json env, {
"success" => true,
"dimensions" => sizes,
}.to_json
file_hash = Digest::SHA1.hexdigest (entry.zip_path + entry.mtime.to_s)
e_tag = "W/#{file_hash}"
if e_tag == prev_e_tag
env.response.status_code = 304
""
else
sizes = entry.page_dimensions
env.response.headers["ETag"] = e_tag
env.response.headers["Cache-Control"] = "public, max-age=86400"
send_json env, {
"success" => true,
"dimensions" => sizes,
}.to_json
end
rescue e
Logger.error e
send_json env, {