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Su'e ata i luga o le lele e fa'aaoga ai le Nginx ma le LuaJIT (OpenResty)

Mo sina taimi i le taimi nei, musuia e le tusiga O le suiga o ata i luga ole laiga o le suiga o ata na fa'aogaina e fa'aoga ai ngx_http_image_filter_module ma sa galue mea uma e pei ona tatau ai. Ae tasi le faʻafitauli na tulaʻi mai ina ua manaʻomia e le pule le mauaina o ata ma fua saʻo mo le faʻapipiʻiina i nisi o auaunaga, aua ... o latou manaoga fa'apitoa ia. Mo se faʻataʻitaʻiga, pe a iai sa matou ata muamua o le tele 1200 × 1200, ma pe a suia le tele matou te tusia se mea e pei o ?suia=600×400, ona tatou maua ai lea o se ata faʻaitiitiga faʻatusatusa i luga o le pito laʻititi, lapoa 400 × 400. E le mafai foi ona maua se ata ma se iuga maualuga (upscale). O na. ?suia=1500×1500 o le a toe faafoi mai le ata lava e tasi 1200 × 1200

O lenei tusiga na sau e laveai OpenResty: liliu le NGINX i se faʻaumau talosaga atoa ia malamalama pe faapefea ona galue Nginx ma Lua ma le faletusi lava ia mo Lua isage/lua-imagick - Lua mama-c fusia i ImageMagick. Aisea na filifilia ai lenei fofo, ae le o, fai mai, se mea i le python - aua e vave ma faigofie. E te le manaʻomia foʻi ona fai ni faila, e saʻo mea uma ile Nginx config (filifiliga).

O le a la le mea tatou te manaʻomia

O faʻataʻitaʻiga o le a tuʻuina atu e faʻatatau i Debian.

Faʻapipiʻi nginx ma nginx-extras

apt-get update
apt-get install nginx-extras

Fa'apipi'i le LuaJIT

apt-get -y install lua5.1 luajit-5.1 libluajit-5.1-dev

Fa'apipi'i imagemagick

apt-get -y install imagemagick

ma faletusi magickwand i ai, i loʻu tulaga mo le version 6

apt-cache search libmagickwand
apt-get -y install libmagickwand-6.q16-3 libmagickwand-6.q16-dev

Fausia lua-mafaufau

Matou te faʻapipiʻi le fale teu oloa (pe ave le zip ma tatala)

cd ~
git clone https://github.com/isage/lua-imagick.git
cd lua-imagick
mkdir build
cd build
cmake ..
make
make install

Afai e lelei mea uma, e mafai ona e faʻatulagaina Nginx.

O le a ou tuʻuina atu se faʻataʻitaʻiga o le config o le backend host, lea, o le mea moni, e nafa ma le suiga. O loʻo faʻapipiʻiina e le server pito i luma, faʻatasi ai ma Nginx, lea e tupu ai le faʻaogaina mo se vaitaimi (aso) ma isi mea.

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 {
        # дефолтные значения ресайза
        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;

        # Есть возможность вынести весь Lua код в отдельный файл
        # 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
            -- для png с альфа каналом
            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;

    # отправляем все jpg и png картинки на 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
    }
}

O le mea e mana'omia (fa'alautele le ata i pito) e tupu i le fa'aaogaina img:extent() ma ua faauigaina e faaaoga ai le parakalafa resize ma se faailoga + i le iuga.

O lo'o maua avanoa nei:

  • WxH (Taumau le fua fa'atatau, fa'aaoga fua maualuga)
  • WxH^ (Taumau le fua fa'atatau, fa'aoga le fua pito i lalo (togo))
  • WxH! (Fa'aamana'ia vaega-fa'atatau)
  • WxH+ (Taumau le fua fa'atatau, fa'aopoopo itū tuaoi)

Aotelega laulau ma fa'ai'uga suiga

Talosaga uri parameter
Fa'atupuina Ata Tele

?suia=400×200
200 × 200

?suia=400×200^
400 × 400

?suia=400×200!
400×200 (E le fa'atatau)

?suia=400×200+
400×200 (Fa'atatau)

Su'e ata i luga o le lele e fa'aaoga ai le Nginx ma le LuaJIT (OpenResty)

Le iʻuga

Mafaufau i le malosi ma le faigofie o lenei auala, e mafai ona e faʻatinoina mea i se faʻalavelave faʻapitoa, mo se faʻataʻitaʻiga, faʻaopoopoina faʻailoga poʻo le faʻatinoina o le faʻatagaina e faʻatapulaʻaina avanoa. Ina ia mafai ona suʻeina le gafatia o le API mo le galue i ata, e mafai ona e vaʻai i faʻamaumauga a le faletusi isage/lua-imagick

puna: www.habr.com

Faaopoopo i ai se faamatalaga