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Jiri Nginx na LuaJIT (OpenResty) wegharịa foto na-efe efe

N'ihi na ezi oge ụfọdụ ugbu a, sitere n'ike mmụọ nsọ akụkọ Hagharịa nha onyonyo na ofufe A haziri ngbanwe onyonyo site na iji ngx_http_image_filter_module ihe niile wee rụọ ọrụ dị ka o kwesịrị. Mana otu nsogbu bilitere mgbe onye njikwa chọrọ ịnata onyonyo nwere oke nha maka ibugo na ọrụ ụfọdụ, n'ihi na... ihe ndị a bụ ihe ha chọrọ. Dịka ọmụmaatụ, ọ bụrụ na anyị nwere ihe oyiyi mbụ nke nha 1200 × 1200, na mgbe resizing anyị na-ede ihe dị ka ?nha = 600×400, mgbe ahụ, anyị na-enweta ihe oyiyi na-ebelata nke ọma n'akụkụ nke kacha nta, nha 400 × 400. Ọ gaghịkwa ekwe omume ịnweta onyonyo nwere mkpebi dị elu (oke elu). Ndị ahụ. ?nha = 1500×1500 ga-eweghachi otu onyonyo ahụ 1200 × 1200

Akụkọ a gbatara ọsọ enyemaka OpenResty: ịtụgharị NGINX ka ọ bụrụ ihe nkesa ngwa zuru oke ịghọta ka Nginx si arụ ọrụ na Lua yana ọba akwụkwọ n'onwe ya maka Lua isage/lua-imagick - Njikọ Lua pure-c na ImageMagick. Kedu ihe kpatara ahọpụtara ngwọta a, ma ọ bụghị, sịnụ, ihe dị na Python - n'ihi na ọ dị ngwa ma dị mma. Ịchọghị ịmepụta faịlụ ọ bụla, ihe niile dị mma na nhazi Nginx (nhọrọ).

Yabụ kedu ihe anyị chọrọ

A ga-enye ihe atụ dabere na Debian.

Ịwụnye nginx na nginx-extras

apt-get update
apt-get install nginx-extras

Ịwụnye LuaJIT

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

Ịwụnye imagemagick

apt-get -y install imagemagick

na ụlọ akwụkwọ anwansi Maka ya, n'ọnọdụ m maka ụdị 6

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

Ụlọ lua-imagick

Anyị na-emechi ebe nchekwa ahụ (ma ọ bụ were zip wee bupụ ya)

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

Ọ bụrụ na ihe niile gara nke ọma, ị nwere ike hazie Nginx.

M ga-enye ihe atụ nke nhazi nke backend host, nke, n'ezie, na-ahụ maka ịmegharị. Onye nkesa n'ihu na-akwado ya, yana Nginx, ebe caching na-eme maka oge ụfọdụ (ụbọchị) na ihe ndị ọzọ.

nginx backend nhazi

# 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
    }
}

Ihe achọrọ (ịgbasa onyonyo gburugburu n'akụkụ) na-eme site na iji img:extent() ma kọwaa ya site na iji paramita resize ya na akara + na njedebe.

Nhọrọ ndị a dị:

  • WxH (Dobe akụkụ-akụkụ, jiri akụkụ dị elu)
  • WxH^ ( Debe akụkụ-akụkụ, jiri akụkụ dị ala (ihe ọkụkụ))
  • WxH! (Leghara akụkụ-oke)
  • WxH+ (Debe akụkụ-akụkụ, gbakwunye oke akụkụ)

Tebụlụ nchịkọta nwere nsonaazụ ngbanwe

Rịọ oke uri
Nha onyonyo mpụta

?nha = 400×200
200 × 200

?nha =400×200^
400 × 400

?nha =400×200!
400×200 (Ọ bụghị nha nha)

?nha =400×200+
400×200 (nke nhata)

Jiri Nginx na LuaJIT (OpenResty) wegharịa foto na-efe efe

Nsonaazụ

N'ịtụle ike na ịdị mfe nke usoro a, ị nwere ike mejuputa ihe nwere ezi uche dị mgbagwoju anya, dịka ọmụmaatụ, ịgbakwunye watermarks ma ọ bụ itinye ikike na ohere nwere oke. Iji chọpụta ike API na-arụ ọrụ na onyonyo, ị nwere ike ịtu aka na akwụkwọ ọba akwụkwọ isage/lua-imagick

isi: www.habr.com

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