ืคึฟืึทืจ ืืึทื ืฅ ืขืืืขืืข ืืึธื ืืืฆื, ืื ืกืคึผืืืขืจื ืืืจื ืืขื ืึทืจืืืงื ืืืื ืจืขืกืืืข ืืื ืงืึทื ืคืืืืขืจื ื ืืฆื ืืื ืึทืืฅ ืืขืืจืืขื ืืื ืขืก ืืึธื. ืืืขืจ ืืืื ืคึผืจืึธืืืขื ืืื ืืืืคืืขืฉืืื ืขื ืืืขื ืืขืจ ืคืึทืจืืืึทืืืขืจ ืืืจืฃ ืฆื ืืึทืงืืืขื ืืืืืขืจ ืืื ืคึผืื ืืืขื ืืืืขื ืฉืึทื ื ืคึฟืึทืจ ืืคึผืืึธืึทืืื ื ืฆื ืขืืืขืืข ืกืขืจืืืืกืขืก, ืืืืึทื ... ืืืก ืืขื ืขื ืืขืืืขื ืืืืขืจ ืืขืื ืืฉ ืืืืขืจืคืขื ืืฉื. ืคึฟืึทืจ ืืืึทืฉืคึผืื, ืืืื ืืืจ ืืึธืื ืึทื ืึธืจืืืื ืขื ืืืื ืคืื ืืจืืืก ืงืกื ืืืงืก ร ืงืกื ืืืงืก, ืืื ืืืขื ืจืขืกืืืื ื ืืืจ ืฉืจืืึทืื ืขืคึผืขืก ืืื ืืจืืืก = 600 ร 400, ืืขืืึธืื ืืืจ ืืึทืงืืืขื ืึท ืคึผืจืึทืคึผืึธืจืฉืึทื ืึทืื ืจืืืืกื ืืืื ืฆืืืืืขื ืื ืงืืขื ืกืืขืจ ืืจืขื, ืืจืืืก ืงืกื ืืืงืก ร ืงืกื ืืืงืก. ืขืก ืืื ืืืื ืืืืืขืืืขื ืฆื ืืึทืงืืืขื ืึท ืืืื ืืื ืึท ืืขืืขืจ ืืึทืืืึธืืข (ืึทืคึผืกืงืืื). ืืขื ืข. ืืจืืืก = 1500 ร 1500 ืืืขื ืฆืืจืืงืงืืืขื ืื ืืขืืืข ืืืื ืงืกื ืืืงืก ร ืงืกื ืืืงืก
ืืขืจ ืึทืจืืืงื ืืขืงืืืขื ืฆื ืจืึทืืขืืืขื ืฆื ืคึฟืึทืจืฉืืืื ืืื Nginx ืึทืจืืขื ืืื Lua ืืื ืื ืืืืืืึธืืขืง ืืื ืคึฟืึทืจ Lua - Lua ืจืืื-C ืืื ืืื ืื ืฆื ImageMagick. ืคืืจืืืืก ืืื ืืึธืก ืืืืืื ื ืืืืกืืขืจืืืืืื, ืืื ื ืื, ืืึธืื, ืขืคึผืขืก ืืื ืคึผืืืืึธื - ืืืืึทื ืขืก ืืื ืฉื ืขื ืืื ืืึทืงืืืขื. ืืืจ ืืึธื ื ืื ืืคืืื ืืึทืจืคึฟื ืฆื ืฉืึทืคึฟื ืงืืื ืืขืงืขืก, ืึทืืฅ ืืื ืจืขืื ืืื ืื Nginx ืงืึทื ืคืืืืขืจืืืฉืึทื (ืึทืคึผืฉืึทื ืึทื).
ืึทืืื ืืืึธืก ืืึธื ืืืจ ืืึทืจืคึฟื
ืืืืฉืคืืื ืืืขื ืืืื ืืขืืขืื ืืืืืจื ืืืืฃ ืืขืืืึทื.
ืื ืกืืึธืืื ื nginx ืืื nginx-extras
apt-get update
apt-get install nginx-extrasืื ืกืืึธืืื ื LuaJIT
apt-get -y install lua5.1 luajit-5.1 libluajit-5.1-devืื ืกืืึธืืื ื ืืืืืืึทืืืงืง
apt-get -y install imagemagickืืื ืืืืืืึธืืขืงื ืืึทืืืงืงืืืึทื ื ืฆื ืขืก, ืืื ืืืื ืคืึทื ืคึฟืึทืจ ืืืขืจืกืืข 6
apt-cache search libmagickwand
apt-get -y install libmagickwand-6.q16-3 libmagickwand-6.q16-devืื ืื ืืืึท-ืืืึทืืืง
ืืืจ ืงืืึธืื ืื ืจืืคึผืึทืืึทืืึธืจื (ืึธืืขืจ ื ืขืืขื ืื ืคืึทืจืฉืืขืกืืขื ืืื ืึทื ืคึผืึทืง ืขืก)
cd ~
git clone https://github.com/isage/lua-imagick.git
cd lua-imagick
mkdir build
cd build
cmake ..
make
make installืืืื ืึทืืฅ ืืื ืืื, ืืืจ ืงืขื ืขื ืงืึทื ืคืืืืขืจ Nginx.
ืืื ืืืขื ืืขืื ืึท ืืืืฉืคึผืื ืคืื ืื ืงืึทื ืคืืืืขืจืืืฉืึทื ืคืื ืื ืืึทืงืขื ื ืืึทืืขืืึธืก, ืืืึธืก, ืืื ืคืึทืงื, ืืื ืคืึทืจืึทื ืืืืึธืจืืืขื ืคึฟืึทืจ ืจืขืกืืืื ื. ืขืก ืืื ืคึผืจืึทืงืกืืื ืืืจื ืื ืคืจืึธื ื ืกืขืจืืืขืจ, ืืืื ืืื Nginx, ืืื ืงืึทืืฉืื ื ืึทืงืขืจื ืคึฟืึทืจ ืึท ืืืืขืจ ืฆืืื (ืืขื) ืืื ืื ืืขืจืข ืืืื.
nginx backend config
# Backend image server
server {
listen 8082;
listen [::]:8082;
set $files_root /var/www/example.lh/frontend/web;
root $files_root;
access_log off;
expires 1d;
location /files {
# ะดะตัะพะปัะฝัะต ะทะฝะฐัะตะฝะธั ัะตัะฐะนะทะฐ
set $w 700;
set $h 700;
set $q 89;
#1-89 allowed
if ($arg_q ~ "^([1-9]|[1-8][0-9])$") {
set $q $arg_q;
}
if ($arg_resize ~ "([d-]+)x([d+!^]+)") {
set $w $1;
set $h $2;
rewrite ^(.*)$ /resize/$w/$h/$q$uri last;
}
rewrite ^(.*)$ /resize/$w/$h/$q$uri last;
}
location ~* ^/resize/([d]+)/([d+!^]+)/([d]+)/files/(.+)$ {
default_type 'text/plain';
set $w $1;
set $h $2;
set $q $3;
set $fname $4;
# ะััั ะฒะพะทะผะพะถะฝะพััั ะฒัะฝะตััะธ ะฒะตัั Lua ะบะพะด ะฒ ะพัะดะตะปัะฝัะน ัะฐะนะป
# content_by_lua_file /var/www/some.lua;
# lua_code_cache off; #dev
content_by_lua '
local magick = require "imagick"
local img = magick.open(ngx.var.files_root .. "/files/" .. ngx.var.fname)
if not img then ngx.exit(ngx.HTTP_NOT_FOUND) end
img:set_gravity(magick.gravity["CenterGravity"])
if string.match(ngx.var.h, "%d+%+") then
local h = string.gsub(ngx.var.h, "(%+)", "")
resize = ngx.var.w .. "x" .. h
-- ะดะปั png ั ะฐะปััะฐ ะบะฐะฝะฐะปะพะผ
img:set_bg_color(img:has_alphachannel() and "none" or img:get_bg_color())
img:smart_resize(resize)
img:extent(ngx.var.w, h)
else
img:smart_resize(ngx.var.w .. "x" .. ngx.var.h)
end
if ngx.var.arg_q then img:set_quality(ngx.var.q) end
ngx.say(img:blob())
';
}
}
# Upstream
upstream imageserver {
server localhost:8082;
}
server {
listen 80;
server_name examaple.lh;
# ะพัะฟัะฐะฒะปัะตะผ ะฒัะต jpg ะธ png ะบะฐััะธะฝะบะธ ะฝะฐ imageserver
location ~* ^/files/.+.(jpg|png) {
proxy_buffers 8 2m;
proxy_buffer_size 10m;
proxy_busy_buffers_size 10m;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://imageserver; # Backend image server
}
}
ืืืึธืก ืืื ืคืืจืืื ืื (ืืงืกืคึผืึทื ืืื ื ืื ืืืื ืึทืจืื ืื ืขืืืฉืึทื) ืืึทืคึผืึทื ื ื ืืฆื img:extent() ืืื ืืื ืืืคืืื ื ื ืืฆื ืืขื ืคึผืึทืจืึทืืขืืขืจ resize ืืื ืึท ืฆืืืื + ืฆืื ืกืืฃ.
ืื ืคืืืืขื ืืข ืึธืคึผืฆืืขืก ืืขื ืขื ืื ืืืฆื:
- WxH (ืืึทืืื ืึทืกืคึผืขืงื-ืคืึทืจืืขืืืขื ืืฉ, ื ืืฆื ืืขืืขืจ ืืืกืืขืกืืื ื)
- WxH^ (ืืึทืืื ืึทืกืคึผืขืงื-ืคืึทืจืืขืืืขื ืืฉ, ื ืืฆื ื ืืืขืจืืงืขืจ ืืืกืืขืกืืื ื (ืืขืจืขืืขื ืืฉ))
- WxH! (ืืืื ืึธืจืืจื ืึทืกืคึผืขืงื-ืคืึทืจืืขืืืขื ืืฉ)
- WxH + (ืืึทืืื ืึทืกืคึผืขืงื-ืคืึทืจืืขืืืขื ืืฉ, ืืืืื ืืืึทื ืืขืืืจืงื)
ืงืืฆืขืจ ืืืฉ ืืื ืจืขืกืืืข ืจืขืืืืืึทืื
ืืขืื ืืจื ืคึผืึทืจืึทืืขืืขืจ
ืจืขืืืืืึทื ืืืื ืืจืืืก
ืืจืืืก = 400 ร 200
ืงืกื ืืืงืก ร ืงืกื ืืืงืก
ืืจืืืก = 400 ร 200 ^
ืงืกื ืืืงืก ร ืงืกื ืืืงืก
ืืจืืืก = 400 ร 200!
400 ร 200 (ื ืื ืคึผืจืึทืคึผืึธืจืฉืึทื ืึทื)
ืืจืืืก = 400 ร 200+
400 ร 200 (ืคึผืจืึทืคึผืึธืจืฉืึทื ืึทื)
ืืึทื ืฅ
ืงืึธื ืกืืืขืจืื ื ืื ืืึทืื ืืื ืคึผืึทืฉืืขืก ืคืื ืืขื ืฆืืืึทื ื, ืืืจ ืงืขื ืขื ืื ืกืืจืืืขื ื ืืื ืื ืืื ืืึทื ืฅ ืงืึธืืคึผืืืฆืืจื ืืึธืืืง, ืืืฉื, ืึทืืื ื ืืืึธืืขืจืืึทืจืงืก ืึธืืขืจ ืืืคึผืืึทืืขื ืื ื ืืขืจืืืืืขื ืืฉ ืืื ืืืืืืขื ืึทืงืกืขืก. ืืื ืกืืจ ืฆื ืืขืคึฟืื ืขื ืื ืงืืืคึผืึทืืืืึทืืื ืคืื ืื API ืคึฟืึทืจ ืืจืืขืื ืืื ืืืืืขืจ, ืืืจ ืงืขื ืขื ืึธืคึผืฉืืงื ืฆื ืื ืืืืืืึธืืขืง ืืึทืงืืืืขื ืืืืฉืึทื
ืืงืืจ: www.habr.com