αα½ααααααα αααα»ααααα·ααααα’ααααα
α’ααααααααααΆααααα½ααααααααα
ααΌα ααααααΎααΎαααααΌαααΆαα’αααΈαααα
α§ααΆα αααααΉαααααΌαααΆααααααα±αααααααα’ααααΎ Debian α
ααΆαααα‘αΎα nginx αα·α nginx-extras
apt-get update
apt-get install nginx-extras
ααΆαααα‘αΎα LuaJIT
apt-get -y install lua5.1 luajit-5.1 libluajit-5.1-dev
ααΆαααα‘αΎα imagemagick
apt-get -y install imagemagick
αα·ααααααΆααα ααααααα αα ααΆ αααα»αααααΈαααααααα»ααααααΆαααααα 6
apt-cache search libmagickwand
apt-get -y install libmagickwand-6.q16-3 libmagickwand-6.q16-dev
ααΆααααΆα lua-imagick
ααΎαααααΌαααααΆαα (α¬αα zip α αΎαααααΆαααΆ)
cd ~
git clone https://github.com/isage/lua-imagick.git
cd lua-imagick
mkdir build
cd build
cmake ..
make
make install
ααααα·αααΎα’αααΈαααααΎαααΆαααα’ α’αααα’αΆα ααααααα ααΆαααααααα Nginx α
αααα»αααΉααααααα§ααΆα ααααα config αα backend host αααααΆααα·ααα ααΊααα½ααα»αααααΌαα ααααααΆαααααΆααααααΌαααα αα ααΆααααΌαααΆαααααΌααααΈααααααΆαααΈαααααΆααα»α ααααΌα ααΆ Nginx ααααα αααααααΆαααααααΆααααΎαα‘αΎααααα»αααααααααΆααααΆαααα½α (αααα) αα·αα’αααΈαααααααααα
ααΆαααααααα ααΆαααααααααααααααΆαααααα nginx
# 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 {
# Π΄Π΅ΡΠΎΠ»ΡΠ½ΡΠ΅ Π·Π½Π°ΡΠ΅Π½ΠΈΡ ΡΠ΅ΡΠ°ΠΉΠ·Π°
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;
# ΠΡΡΡ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ Π²ΡΠ½Π΅ΡΡΠΈ Π²Π΅ΡΡ Lua ΠΊΠΎΠ΄ Π² ΠΎΡΠ΄Π΅Π»ΡΠ½ΡΠΉ ΡΠ°ΠΉΠ»
# 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
-- Π΄Π»Ρ png Ρ Π°Π»ΡΡΠ° ΠΊΠ°Π½Π°Π»ΠΎΠΌ
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;
# ΠΎΡΠΏΡΠ°Π²Π»ΡΠ΅ΠΌ Π²ΡΠ΅ jpg ΠΈ png ΠΊΠ°ΡΡΠΈΠ½ΠΊΠΈ Π½Π° 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
}
}
α’αααΈαααααααΌαααΆαααΆαααΆα (αααααΈαααΌαααΆααα»ααα·αααα) ααΎαα‘αΎααααααααΎ img:extent()
αα·αααααΌαααΆαααααααααααααΎαααΆαααΆαααααα resize
ααΆαα½αααΉααααααΆαα½αα +
αα
βα
α»αβαααα
ααα
αααααΎαααΆααααααα’αΆα ααααΎααΆαα
- WxH (αααααΆαααΆααΆααααα·αααααΆα ααααΎαα·ααΆααααααααααΆα)
- WxH^ (αααααΆαααΆααΆααα ααααΎαα·ααΆαααααΆα (α αααΉα))
- WxH! (αα·αα’αΎααΎαααΆααΆααα)
- WxH+ (αααααΆαααΆααΆααααα·αααααΆα ααααααααα»αα αα αα)
ααΆααΆαααααααααΆαα½αααΉαααααααααααΆααααααΌαααα α
ααααΎαα»ααααΆαααΆαααααα
αααα
ααααα αααΌαααΆα
?resize=400Γ200
200 Γ 200
?resize=400Γ200^
400 Γ 400
?resize=400Γ200!
400 Γ 200 (αα·ααααΆααΆααα)
?resize=400Γ200+
400 Γ 200 (αααΆααΆααα)
αααααα
ααααα·α
αΆαααΆααΎααΆααα αα·αααΆαααΆαααααααα·ααΈααΆαααααααα α’αααα’αΆα
α’αα»ααααα’αααΈαααΆαα½αααΉααααααα·ααααΆαααααα»αααααΆα α§ααΆα ααα ααΆαααααααααΆααααααΆααααΉα α¬ααΆαα’αα»ααααααΆαα’αα»ααααΆαααΆαα½αααΉαααΆαα
αΌαααααΎααααΆααααΆααααααα ααΎααααΈααααααααααΈαααααααΆααααα API αααααΆααααααΎααΆαααΆαα½αααΌαααΆα α’αααα’αΆα
ααααα
α―αααΆααααααΆααα
ααααα: www.habr.com