modified: README.md

Author: yanue

README.md

@@ -46,6 +46,26 @@ img.xxx.com
 * inotify(可选)
 
 ## 安装
+
+#### nginx vhost 配置
+server {
+    listen   80;
+
+    index index.php index.html index.htm;
+    set $root_path '/var/www';
+    root $root_path;
+
+
+    location / {
+            index  index.html index.htm;
+    }
+
+
+	location /lua {
+		default_type 'text/plain';
+      		content_by_lua 'ngx.say("hello, ttlsa lua")';
+    }
+
     #/thumb目录下的图片请求不经过缩略图模块
     location ^~ /thumb/ {
 
@@ -69,4 +89,75 @@ img.xxx.com
                     set $img_ext $5;    # 图片文件格式后缀
                     content_by_lua_file /etc/nginx/lua/img.lua;    # 加载外部 Lua 文件
             }
-    }
+    }
+
+    location ~ /\.ht {
+        deny all;
+    }
+}
+
+#### lua文件
+-- 检测路径是否目录
+local function is_dir(sPath)
+    if type(sPath) ~= "string" then return false end
+
+    local response = os.execute("cd " .. sPath)
+    if response == 0 then
+        return true
+    end
+    return false
+end
+
+-- 文件是否存在
+function file_exists(name)
+    local f = io.open(name, "r")
+    if f ~= nil then io.close(f) return true else return false end
+end
+
+-- 获取文件路径
+function getFileDir(filename)
+    return string.match(filename, "(.+)/[^/]*%.%w+$") --*nix system
+end
+
+-- 获取文件名
+function strippath(filename)
+    return string.match(filename, ".+/([^/]*%.%w+)$") -- *nix system
+end
+
+--去除扩展名
+function stripextension(filename)
+    local idx = filename:match(".+()%.%w+$")
+    if (idx) then
+        return filename:sub(1, idx - 1)
+    else
+        return filename
+    end
+end
+
+--获取扩展名
+function getExtension(filename)
+    return filename:match(".+%.(%w+)$")
+end
+
+-- 开始执行
+-- ngx.log(ngx.ERR, getFileDir(ngx.var.file));
+
+local gm_path = '/usr/local/bin/gm'
+
+-- check image dir
+if not is_dir(getFileDir(ngx.var.file)) then
+    os.execute("mkdir -p " .. getFileDir(ngx.var.file))
+end
+
+-- 如果原始文件存在,则缩放(以最小边,不变形)
+if (file_exists(ngx.var.request_filepath)) then
+    local cmd = gm_path .. ' convert ' .. ngx.var.request_filepath
+    cmd = cmd .. " -resize " .. ngx.var.img_width .. "x" .. ngx.var.img_height
+    cmd = cmd .. " +profile \"*\" " .. ngx.var.file;
+    ngx.log(ngx.ERR, cmd);
+    os.execute(cmd);
+    ngx.exec(ngx.var.uri);
+else
+    ngx.exit(ngx.HTTP_NOT_FOUND);
+end
+