Nginx中使用Lua脚本与图片的缩略图处理的实现

#!/bin/bashapt-get updateapt-get install gcc g++ make wget openssl libssl-dev vim bzip2 -ytar xzvf LuaJIT-2.0.4.tar.gzcd LuaJIT-2.0.4make install PREFIX=/usr/local/luajitecho 'export LUAJIT_LIB=/usr/local/luajit/lib'>>/etc/bashrcecho 'export LUAJIT_INC=/usr/local/luajit/include/luajit-2.0'>>/etc/bashrcsource /etc/bashrccd /root/nginx_lua  # 注意你把文件文件放在哪里就去哪里！！！tar xf LuaJIT-2.0.4.tar.gztar -xzvf v0.10.9rc7.tar.gz -C /usr/local/src   # lua-nginx-module-0.10.9rc7tar -xzvf v0.3.0.tar.gz -C /usr/local/srctar jxvf pcre-8.42.tar.bz2 -C /usr/local/src/tar zxvf zlib-1.2.11.tar.gz -C /usr/local/src/tar -xzvf nginx-1.16.1.tar.gz -C /usr/local/srcln -s /usr/local/nginx/sbin/nginx   /usr/bin/nginxcd  /usr/local/src/nginx-1.16.1./configure --prefix=/usr/local/nginx --add-module=/usr/local/src/ngx_devel_kit-0.3.0 --add-module=/usr/local/src/lua-nginx-module-0.10.9rc7 --with-http_ssl_module --with-pcre=/usr/local/src/pcre-8.42 --with-zlib=/usr/local/src/zlib-1.2.11 --with-http_stub_status_module --without-http-cache --with-http_gzip_static_modulemake -j2make installcp /usr/local/luajit/lib/libluajit-5.1.so.2 /usr/local/lib/echo "/usr/local/lib"  >>/etc/ld.so.conf/sbin/ldconfigmv  /usr/local/nginx/conf/nginx.conf  /tmpcd /root/nginx_lua   # 注意你把文件文件放在哪里就去哪里！！！cp   nginx.conf     /usr/local/nginx/conf/cp  -r  lua  /usr/local/nginx/conf/nginx#curl 127.0.0.1/hello#curl 127.0.0.1/lua

worker_processes  1;events {    worker_connections  1024;}http {    include       mime.types;    default_type  application/octet-stream;    sendfile        on;    keepalive_timeout  65;    server {        listen       80;        server_name  localhost;        location / {            root   html;            index  index.html index.htm;        }        location /hello {        default_type 'text/plain';        content_by_lua 'ngx.say("hello,lua")';        }        location /lua {        default_type 'text/html';        content_by_lua_file conf/lua/test.lua;        }        error_page   500 502 503 504  /50x.html;        location = /50x.html {            root   html;        }    }}

ngx.say("hello lua");

nginx

...tar -xzvf v0.10.14rc7.tar.gz -C /usr/local/src   # lua-nginx-module-0.10.14rc7..../configure --prefix=/usr/local/nginx --add-module=/usr/local/src/ngx_devel_kit-0.3.0 --add-module=/usr/local/src/lua-nginx-module-0.10.14rc7 --with-http_ssl_module --with-pcre=/usr/local/src/pcre-8.42 --with-zlib=/usr/local/src/zlib-1.2.11 --with-http_stub_status_module --without-http-cache --with-http_gzip_static_module...

devel_kit-0.3.0/src -I /home/usr/ngx_devel_kit-0.3.0/src -I /home/usr/ngx_devel_kit-0.3.0/objs -I objs/addon/ndk -I /usr/local/include/luajit-2.0 / -o objs/addon/src/ngx_http_lua_req_body.o / /home/usr/lua-nginx-module-0.10.8/src/ngx_http_lua_req_body.c/home/usr/lua-nginx-module-0.10.8/src/ngx_http_lua_headers.c: In function 'ngx_http_lua_ngx_req_raw_header':/home/usr/lua-nginx-module-0.10.8/src/ngx_http_lua_headers.c:151:15: error: incompatible types when assigning to type 'ngx_buf_t * {aka struct ngx_buf_s *}' from type 'ngx_chain_t {aka struct ngx_chain_s}'             b = hc->busy[i];               ^/home/usr/lua-nginx-module-0.10.8/src/ngx_http_lua_headers.c:227:15: error: incompatible types when assigning to type 'ngx_buf_t * {aka struct ngx_buf_s *}' from type 'ngx_chain_t {aka struct ngx_chain_s}'             b = hc->busy[i];               ^objs/Makefile:1465: recipe for target 'objs/addon/src/ngx_http_lua_headers.o' failedmake[1]: *** [objs/addon/src/ngx_http_lua_headers.o] Error 1make[1]: *** Waiting for unfinished jobs....make[1]: Leaving directory '/home/usr/nginx-1.17.10'make: *** [build] Error 2Makefile:8: recipe for target 'build' failed

# /home/3.jpg  图片地址   						 # /home/3_100x100.jpg  切割后的图片存放地址convert /home/3.jpg -resize 100x100 +profile "*" /home/3_100x100.jpg

apt-get install imagemagick -y

local ext =  ngx.var.extlocal filepath_i = ngx.var.request_filepathlocal filepath = filepath_i .. "." .. extlocal width = ngx.var.widthlocal height = ngx.var.heightlocal command = "convert " .. filepath .. " -resize " .. width .. "x" .. height .. " +profile /"*/" " .. filepath_i .. "_" .. width .. "x" .. height .. "." .. ext;os.execute(command);-- ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓    --这个方法是在lua脚本里面直接读取切好的缩略图，读取完通过 ngx.say 返回二进制local filename = filepath_i .. "_" .. width .. "x" .. height .. "." .. ext;local photo_size = io.open(filename,"rb") local photo_data_size = photo_size:read("*a");photo_size:close();ngx.say(photo_data_size);-- ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑-- 如果不想在lua中读取图片的话，使用 ngx.exec(ngx.var.request_uri);-- 这个表示重新请求这个地址  /xxx/1_100x100.jpg--ngx.exec(ngx.var.request_uri);

user root;  worker_processes  1;events {    worker_connections  1024;}http {    include       mime.types;    default_type  application/octet-stream;    sendfile        on;    keepalive_timeout  65;    server {        listen       80;        server_name  localhost;        location / {            root   html;            index  index.html index.htm;        }        location /hello {        default_type 'text/plain';        content_by_lua 'ngx.say("hello,lua")';        }        location /lua {        default_type 'text/html';        content_by_lua_file conf/lua/test.lua;        }	location ~* /photo/(.*)_(/d+)x(/d+)/.(jpg|png|jpeg|gif|JPG|PNG|JPEG|GIF)$ {		root /;                if (!-f $request_filename) {                         lua_code_cache on;                         set $request_filepath /$1;                        set $width $2;                        set $height $3;                        set $ext $4;                        # 加载外部 Lua 文件   注意！！！ 这个文件因为要切割图片需要权限                        # 加载外部 Lua 文件   注意！！！ 这个文件因为要切割图片需要权限                        # 加载外部 Lua 文件   注意！！！ 这个文件因为要切割图片需要权限                        content_by_lua_file conf/lua/ImageResizer.lua;  #加载外部 Lua 文件   注意！！！ 这个文件需要权限                }        }        location /photo/ {            alias /;        }        error_page   500 502 503 504  /50x.html;        location = /50x.html {            root   html;        }    }}

nginx -s reload