nginx.conf.template

    server {
        listen   80;
        location / {
            proxy_cache images;
            proxy_cache_valid 200 ${PROXY_CACHE_VALID_200};
            proxy_cache_key “${DOLLAR}scheme://${DOLLAR}host${DOLLAR}request_uri${DOLLAR}is_args${DOLLAR}args”;
            proxy_pass http://small_light_server;
        }
  
        # TODO ngx_small_lightがwebpファイルを処理出来ないのでそのままプロキシする。
        location ~ ^/${URL_PREFIX}([0-9]+)x([0-9]+)/([^/]+)/(.+\.webp)${DOLLAR} {
          set ${DOLLAR}width ${DOLLAR}1;  
          set ${DOLLAR}height ${DOLLAR}2; 
          set ${DOLLAR}quality ${DOLLAR}3;
          set ${DOLLAR}file ${DOLLAR}4;   

          expires ${EXPIRES};
          add_header Pragma public;       
          add_header Cache-Control "public";

          resolver               8.8.4.4 8.8.8.8 valid=300s;     
          resolver_timeout       10s;     

          set ${DOLLAR}s3_bucket "${S3_BUCKET}";
          proxy_http_version     1.1;     
          proxy_set_header       Host ${DOLLAR}s3_bucket;
          proxy_set_header       Authorization '';
          proxy_hide_header      x-amz-id-2;
          proxy_hide_header      x-amz-request-id;
          proxy_hide_header      Set-Cookie;
          proxy_ignore_headers   "Set-Cookie";
          proxy_buffering        off;     
          proxy_intercept_errors on;      
          proxy_set_header X-Real-IP ${DOLLAR}remote_addr; 
          proxy_set_header X-Forwarded-For ${DOLLAR}proxy_add_x_forwarded_for;
          proxy_pass http://${DOLLAR}s3_bucket/${S3_DIR_PREFIX}${DOLLAR}file;
        }
    }