nginx_image_filter http_image_filter_module配置----------------------------------第一种：//官方配置location /img/ {    proxy_pass   http://backend;    image_filter resize 150 100;    image_filter rotate 90;    error_page   415 = /empty;}location = /empty {    empty_gif;}http://nginx.org/en/docs/http/ngx_http_image_filter_module.html#image_filter_webp_quality-----------------------------------第二种：//裁剪图片，不存储硬盘访问 http://xxx.com/fanfan_11.jpg@100w_100h_75Q_rhttp://xxx.com/fanfan.jpg@150w_100h_75Q_rhttp://xxx.com/img/fanfan.jpg@11w_11_h_80Q_r# 等比缩放图片location ~ (.+)\.(jpg|gif|png)@(\d+)w_(\d+)h_(\d+)Q_r$ {    set $w $3; #宽    set $h $4; #高    set $q $5; #图片质量    image_filter resize $w $h;    image_filter_jpeg_quality $q;    image_filter_buffer 5M;    try_files $1.$2 /img/notfound.jpg;}# 裁剪图片location ~ (.+)\.(jpg|gif|png)@(\d+)w_(\d+)h_(\d+)Q_c$ {    set $w $3; #宽    set $h $4; #高    set $q $5; #图片质量    image_filter crop $w $h;    image_filter_jpeg_quality $q;    image_filter_buffer 5M;    try_files $1.$2 /img/notfound.jpg;}---------------------------------------第三种：//保存在磁盘访问 http://xxx.com/image_filter/222.jpg@120w_120h_75Q_r代理到xxx.com/image-resize/image_filter/222.jpg?w=200&h=200&q=75location ~ (.+)\.(jpg|gif|png)@(\d+)w_(\d+)h_(\d+)Q_([rc])$ {        # 方便调试    error_log  /usr/local/var/logs/nginx/xxx.com.imagefilter.error.log  debug;    # 限制referer，防盗链    # valid_referers xxx.com;#domain modify    # if ($invalid_referer) {return 404;}     set $w $3; #宽    set $h $4; #高    set $q $5; #图片质量    set $type $6;    set $image_path  $1.$2; #真实图片地址    set $cache_path  $1_$3w_$4h_$5Q_$6.$2;  #临时文件地址    if ($type = 'r') {        set $type 'image-resize';    }    if ($type = 'c') {        set $type 'image-crop';    }    set $image_uri  /$type$image_path?w=$w&h=$h&q=$q;    if (-f $document_root$cache_path) {        rewrite (.+)\.(jpg|gif|png)@(\d+)w_(\d+)h_(\d+)Q_([rc])$ $1_$3w_$4h_$5Q_$6.$2;        break;    }    if (!-f $document_root$cache_path) {        # proxy_pass http://$server_name.$image_uri;        # 必须填写ip,填写域名的话，nginx在启动的时候会检测域名，解析DNS,启动后，在修改域名的解析是不生效的        # 实际上，本机填写域名报500不生效，估计是DNS设置不对，会在server下添加        # resolver 127.0.0.1 valid=300s;        proxy_pass http://127.0.0.1$image_uri;        break;    }    proxy_store $document_root$cache_path;    proxy_store_access user:rw group:rw all:r;    proxy_temp_path  /tmp/images;    proxy_set_header Host $host;    expires  10d; # 设置图片过期时间10天}location ~ /image-resize(.+)\.(jpg|gif|png) {    rewrite /image-resize(.+)\.(jpg|gif|png)$ $1.$2 break;    image_filter resize $arg_w $arg_h;    image_filter_jpeg_quality $arg_q;    image_filter_buffer 5M;    try_files $1.$2 /img/notfound.jpg;}location ~ /image-crop(.+)\.(jpg|gif|png) {    rewrite /image-crop(.+)\.(jpg|gif|png)$ $1.$2 break;    image_filter crop $arg_w $arg_h;    image_filter_jpeg_quality $arg_q;    image_filter_buffer 5M;    try_files $1.$2 /img/notfound.jpg;}https://blog.wangjunfeng.com/archives/669