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Hoʻololi kiʻi i ka lele

Ma kahi kokoke i nā polokalamu pūnaewele e hoʻohana ana i nā kiʻi, pono e hana i nā kope liʻiliʻi o kēia mau kiʻi, a he nui nā ʻano no nā kiʻi hou aʻe.
ʻO ka hoʻohui ʻana i nā ana hou i kahi noi e loaʻa nei ke kumu o kekahi mau poʻo. No laila ka hana:

Nń Pahuhopu

E hōʻike i ka papa inoa o nā pono:

  • E hana i nā kiʻi hou aʻe o kēlā me kēia ʻano ma ka lele me ka ʻole o ka hoʻokomo ʻana i nā hana hou i loko o ka noi i kēlā me kēia manawa i ka wā o ka noi;
  • ʻAʻole pono e hana ʻia nā kiʻi hou ma kēlā me kēia noi;
  • Hoʻopaʻa i ka hiki ke hana i nā kiʻi hou o nā ʻano kikoʻī ʻole.

E wehewehe au i ka manaʻo hope, no ka mea, kūʻē iki i ka helu mua. Inā mākou e wehe i ka hanauna o nā kiʻi, a laila hiki ke hoʻouka ʻia ma ka pūnaewele ma ka hana ʻana i ka nui o nā noi e hoʻololi i ke kiʻi i kahi helu pau ʻole o nā ʻano, no laila pono e pani ʻia kēia nāwaliwali.

nginx hoʻonohonoho hoʻonohonoho

No ka hoʻoponopono i nā koi i luna aʻe, pono mākou i ka hoʻonohonoho o nā modules nginx:

Nā Modula ngx_http_image_filter_module и ngx_http_secure_link_module ʻaʻole i hoʻokomo ʻia e ka paʻamau, no laila pono lākou e kuhikuhi ʻia i ka pae hoʻonohonoho hoʻonohonoho nginx:

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

hoʻonohonoho nginx

Hoʻohui mākou i kahi mea hou i kā mākou hoʻonohonoho hoʻokipa wahi a me nā ʻāpana huna huna:

...
    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;
        }
...
    }
...

Hoʻohui pū mākou i kahi host hou i ka 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; }
}

ʻO ka hopena, hiki ke loaʻa nā kiʻi hou me ka hoʻohana ʻana i nā loulou i lalo:

* hana_files - maʻalahi i nā hakahaka a me nā ʻano Lūkini, no laila pono wau e hana i kahi koʻi me Alia.

E hoʻohana i kahi polokalamu kele pūnaewele

Ma ka pae noi pūnaewele, hiki iā ʻoe ke hana i kēia kaʻina hana (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'
                );

ʻOiai makemake wau e helu i nā nui nāmua.

ʻO Rake

I ka holoi ʻana i ke kiʻi kumu, ʻaʻole e hoʻopau ʻia nā hiʻohiʻona mai ka cache a hiki i ka hoʻopau ʻia ʻana o ka cache, a ma kā mākou hihia, hiki ke loaʻa nā hiʻohiʻona no kahi lā ma hope o ka holoi ʻana, akā ʻo kēia ka manawa kiʻekiʻe.

kumu

Source: www.habr.com

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