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Update img.lua

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yanue.net
2014-11-03 11:54:26 +08:00
parent 012747ea25
commit f42efa6e32
1 changed files with 10 additions and 4 deletions
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14
lua/img.lua
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@@ -1,3 +1,8 @@
-- nginx lua thumbnail module
-- last update : 2014/11/3
-- version : 0.5.0
-- created by yanne
-- 检测路径是否目录
local function is_dir(sPath)
if type(sPath) ~= "string" then return false end
@@ -43,17 +48,19 @@ end
-- 开始执行
-- ngx.log(ngx.ERR, getFileDir(ngx.var.file));
local gm_path = '/usr/local/bin/gm'
local gm_path = '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)
-- 裁剪后保证等比缩图 （缺点：裁剪了图片的一部分）
-- gm convert input.jpg -thumbnail "100x100^" -gravity center -extent 100x100 output_3.jpg
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 .. " -thumbnail " .. ngx.var.img_width .. "x" .. ngx.var.img_height .. "^"
cmd = cmd .. " -gravity center -extent " .. ngx.var.img_width .. "x" .. ngx.var.img_height
cmd = cmd .. " +profile \"*\" " .. ngx.var.file;
ngx.log(ngx.ERR, cmd);
os.execute(cmd);
@@ -61,4 +68,3 @@ if (file_exists(ngx.var.request_filepath)) then
else
ngx.exit(ngx.HTTP_NOT_FOUND);
end