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O le suiga o ata i luga ole laiga

I le toetoe lava o soʻo se 'upega tafaʻilagi e faʻaogaina ata, e manaʻomia le faia o ni kopi laiti o nei ata, ma e masani ona i ai ni faʻasologa mo ata faʻaopoopo.
O le fa'aopoopoina o fua fou i se fa'aoga o lo'o iai e mafua ai fo'i nisi tiga ulu. O lea la o le galuega:

Faamoemoega

Sei o tatou faʻaalia le lisi o manaʻoga:

  • Fausia ata faaopoopo o soʻo se faʻatulagaga i luga ole lele e aunoa ma le faʻaofiina o galuega faʻaopoopo i totonu o le talosaga i soʻo se taimi aʻo iai le talosaga;
  • O ata fa'aopoopo e le mana'omia ona fa'atupuina i luga o talosaga uma;
  • Fa'agata le mafai ona fa'atupuina ata fa'aopoopo o fa'asologa e le'i fa'ailoaina.

O le a ou faamatala atu le manatu mulimuli, aua e feteenai teisi ma le manatu muamua. Afai tatou te faia le faʻatupuina o soʻo se ata matala, ona i ai lea o se osofaʻiga i luga o le saite e ala i le faʻatupuina o se numera tele o talosaga e toe faʻaleleia le ata i se numera e le iʻu o faʻasologa, o lea e tatau ai ona tapunia lenei faʻafitauli.

nginx faʻatulagaina faʻapipiʻi

Ina ia foia manaoga o loʻo i luga matou te manaʻomia le seti o le nginx modules:

Modules ngx_http_image_filter_module и ngx_http_secure_link_module e le'o fa'apipi'iina e ala i le fa'aletonu, o lea e tatau ai ona fa'amaonia i le tulaga fa'apipi'i nginx:

phoinix@phoinix-work:~/src/nginx-0.8.29
$ ./configure --with-http_secure_link_module --with-http_image_filter_module

faatulagaga nginx

Matou te faʻaopoopoina se mea fou i la matou faʻalapotopotoga talimalo nofoaga ma fa'amaufa'ailoga lautele fa'amaufa'ailoga:

...
    proxy_cache_path /www/myprojects/cache levels=1:2 keys_zone=image-preview:10m;
...
    server {
...
        location ~ ^/preview/([cir])/(.+) {
        # Тип операции
            set                         $oper $1;
        # Параметры изображения и путь к файлу
            set                         $remn $2;
        # Проксируем на отдельный хост
            proxy_pass                  http://myproject.ru:81/$oper/$remn;
            proxy_intercept_errors      on;
            error_page                  404 = /preview/404;
        # Кеширование
            proxy_cache                 image-preview;
            proxy_cache_key             "$host$document_uri";
        # 200 ответы кешируем на 1 день
            proxy_cache_valid           200 1d;
        # остальные ответы кешируем на 1 минуту
            proxy_cache_valid           any 1m;
        }
        
        # Возвращаем ошибку
        location = /preview/404 {
            internal;
            default_type                image/gif;
            alias                       /www/myprojects/image/noimage.gif;
        }
...
    }
...

Matou te faʻaopoopoina foi se talimalo fou i le config:

server {
    server_name                     myproject.ru;
    listen                          81;

    access_log                      /www/myproject.ru/logs/nginx.preview.access_log;
    error_log                       /www/myproject.ru/logs/nginx.preview.error_log info;

    # Указываем секретное слово для md5
    secure_link_secret              secret;

    # Ошибки отправляем она отдельный location
    error_page                      403 404 415 500 502 503 504 = @404;

    # location Для фильтра size
    location ~ ^/i/[^/]+/(.+) {
        
        # грязный хак от Игоря Сысоева *
        alias                       /www/myproject.ru/images/$1;
        try_files                   "" @404;
    
        # Проверяем правильность ссылки и md5
        if ($secure_link = "") { return 404; }
        
        # Используем соответсвующий фильтр
        image_filter                size;
    }

    # По аналогии остальные location для других фильтров
    location ~ ^/c/[^/]+/(d+|-)x(d+|-)/(.+) {
        set                         $width  $1;
        set                         $height $2;
        
        alias                       /www/myproject.ru/images/$3;
        try_files                   "" @404;
    
        if ($secure_link = "") { return 404; }
    
        image_filter                crop  $width  $height;
    }
    
    location ~ ^/r/[^/]+/(d+|-)x(d+|-)/(.+) {
        set                         $width  $1;
        set                         $height $2;

        alias                       /www/myproject.ru/images/$3;
        try_files                   "" @404;

        if ($secure_link = "") { return 404; }

        image_filter                resize  $width  $height;
    }

    location @404 { return 404; }
}

O le i'uga, e mafai ona maua ni ata fa'aopoopo e ala i feso'ota'iga nei:

* try_files - maaleale i avanoa ma mataitusi Rusia, o lea na tatau ai ona ou faia se tootoo ma igoa pepelo.

Fa'aoga i se upegatafa'ilagi

I luga ole laiga ole upega tafa'ilagi, e mafai ona e faia le faiga lenei (Perl):

sub proxy_image {
    use Digest::MD5     qw /md5_hex/;
    my %params = @_;
    my $filter = {
                    size    => 'i',
                    resize  => 'r',
                    crop    => 'c'            
                  }->{$params{filter}} || 'r';
    my $path = ($filter ne 'i' ?
                    ( $params{height} || '_' ) . 'x' . ( $params{width} || '_' ) . '/' :
                    ()
               ) . $params{source};
    my $md5 = md5_hex( $path . 'secret' );
    $path = '/preview/' . $filter . '/' . $md5 . '/' . $path;
    return $path;
}

my $preview_path = &proxy_image(
                    source  => 'image1.jpg',
                    height  => 100,
                    width   => 100,
                    filter  => 'resize'
                );

E ui lava ou te fautuaina foi le fuafuaina o le tele tofo.

Salu

Pe a tapeina le ata muamua, muaʻi vaʻaia, e masani lava, o le a le tapeina mai le faʻaoga seia oʻo ina faʻaleaogaina le cache, ma i la matou tulaga, o faʻamatalaga e mafai ona i ai mo se aso pe a uma ona tape, ae o le taimi aupito maualuga lea.

le uluai kopi

puna: www.habr.com

Faaopoopo i ai se faamatalaga