前言
对于Apdche这个东西，绝大多数人都是非常熟悉的。很多人都会诟病这个Apache，说它效率不高而且非常消耗资源，然后会建议用Nginx。这些不能否认，但是我还是很喜欢Apache，因为它比较稳定。
Apache关于Lua我不知道是哪一个版本编译进去了的，但是最新版的是有的。在Apache的bin目录下有一个lua51.dll很明显，这个是Lua5.1版本的，目前Lua已经到了5.3版本了，如果你想追求新的版本的话，你可以自己把apache编译一次。然后还有，在Apache的modules目录下有一个mod_lua.so是开启Apache和Lua“通信桥梁”的文件。
修改配置文件
- 找到含有mod_lua.so的一行，去掉前边的#即可。
- 找到含有mod_rewrite.so的一行，去掉前边的#。
- 可能你需要修改Apache的默认文档，在DirectoryIndex的位置按要求添加即可。
- 将AllowOverride后边的None写为All，表示在整台服务器上都开启了URL重写。
写Demo文件
- 首先我们写一个.htaccess的文件，作用就是会把我们的Lua后缀修改为php。,内容如下：
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} info
RewriteRule (.*).php $1.lua [NC]
- 新建一个info.lua，写入内容如下：
-- Extend tostring to report function type (C or Lua)
do
local type, tostr = type, tostring
function tostring(obj)
local type, val = type(obj), tostr(obj)
if type == "function" then
type = pcall(coroutine.create, obj) and "Lua " or "C " -- coroutines cannot start at a C function
return type .. val
else
return val
end
end
end
local safe_replacements = {
["<"] = "<",
[">"] = ">",
["&"] ="&",
}
local function safestring(...)
return tostring(...):gsub("[<>&]", safe_replacements):gsub("\n", "<br/>\n")
end
local function emstring(...)
return ""<em>".. safestring(...) .."</em>""
end
local function print_info(info)
print [[
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<title>mod_lua info</title>
<style type="text/css">
body {
background-color: #eef;
color: black;
font-family: sans-serif;
}
table {
border-collapse: collapse;
text-align: left;
margin-left: auto;
margin-right: auto;
}
table.head th {
vertical-align: middle;
background-color: #99c;
}
div.center {
text-align: center;
}
h1 {
margin: 0;
padding: 0.3em 0;
}
td, th {
border: 1px black solid;
vertical-align: baseline;
font-size: 75%;
}
th {
background-color: #ccf;
}
td {
background-color: #ccc;
}
ul {
list-style: square;
margin: 0;
padding-left: 2em;
}
</style>
</head>
<body>
<div class="center">
<table class="head" width="600">
<tr> <th><h1>mod_lua</h1></th> </tr>
</table>
]]
for group, settings in pairs(info) do
print('
<h2><a name="'.. group:gsub("[^a-zA-Z]", "") ..'">'.. group .. "</a></h2>
")
print [[
<table width="600">
]]
for key, value in pairs(settings) do
print("<tr> <th>".. key .."</th> <td>".. value .."</td> </tr>\n")
end
print "</table>
\n"
end
print [[
</div>
</body>
</html>
]]
end
local function compile_info(req)
local info = {}
do -- Lua compile options
local dump = string.dump(function() end)
local gc_pause = collectgarbage("setpause", 1); collectgarbage("setpause", gc_pause)
local gc_stepmul = collectgarbage("setstepmul", 2); collectgarbage("setstepmul", gc_stepmul)
info["Lua configuration"] = {
-- Bytecode header is undocumented, see luaU_header in lundump.c
Version = ("%i.%i"):format(math.floor(dump:byte(5) / 16), dump:byte(5) % 16),
Endianness = dump:byte(7) == 1 and "little" or "big",
int = dump:byte(8)*8 .. " bit integer",
size_t = dump:byte(9)*8 .. " bit integer",
["VM instruction"] = dump:byte(10)*8 .. " bit integer",
Number = dump:byte(11)*8 .. " bit " .. (dump:byte(12) == 1 and "integer" or "float"),
-- package.config is undocumented, see luaopen_package in loadlib.c
["Path seperator"] = safestring(package.config:sub(1,1)),
["Lua package path"] = safestring(package.path:gsub(package.config:sub(3,3), "\n")),
["C package path"] = safestring(package.cpath:gsub(package.config:sub(3,3), "\n")),
-- Garbage collection values _are_ documented :)
["GC count"] = ("%.0f bytes"):format(collectgarbage"count" * 1024),
["GC pause"] = ("%.0f%%"):format(gc_pause),
["GC step multiplier"] = ("%.0f%%"):format(gc_stepmul),
}
end
do -- Globals
local g = {}
for key, value in pairs(getfenv(0)) do
local typev = type(value)
local str
if typev == "table" then
str = safestring(value)
if value ~= getfenv(0) then -- don't recursively follow _G
str = str .. "
<ul>"
for field, v in pairs(value) do
str = str .. "<li>" .. safestring(field) .. " ("
if type(v) == "string" then
str = str .. emstring(v)
else
str = str .. safestring(v)
end
str = str .. ")</li>"
end
str = str .. "</ul>
"
end
elseif typev == "string" then
str = emstring(value)
else
str = safestring(value)
end
g[safestring(key)] = str
end
info.Globals = g
end
do -- Request object
local rinfo = {}
for _, field in pairs{"puts", "write", "document_root", "parseargs", "parsebody", "debug", "info", "notice",
"warn", "err", "crit", "alert", "emerg", "add_output_filter", "assbackwards", "status", "protocol", "range",
"content_type", "content_encoding", "ap_auth_type", "unparsed_uri", "user", "filename", "canonical_filename",
"path_info", "args", "hostname", "uri", "the_request", "method", "headers_in", "headers_out"} do
local value = req[field]
if type(value) == "userdata" and apr_table and apr_table.pairs then
local list = "
<ul>"
for key, value in apr_table.pairs(value) do
list = list .. "<li>" .. safestring(key) .. " (" .. emstring(value) .. ")</li>"
end
rinfo[field] = tostring(req[field]) .. list .. "</ul>
"
elseif type(value) == "string" then
rinfo[field] = emstring(req[field])
else
rinfo[field] = safestring(req[field])
end
end
info.Request = rinfo
end
do -- Arguments (query string)
local args = req:parseargs()
local args_clean = {}
for key, value in pairs(args) do
args_clean[safestring(key)] = emstring(value)
end
if next(args_clean) then
info["Query string"] = args_clean
end
end
return info
end
function handle(r)
-- setup the environment
r.content_type = "text/html"
r.headers_out["X-Powered-By"] = "mod_lua; " .. _VERSION
print = function(s) return r:write(tostring(s)) end
-- run the main script
local info = compile_info(r)
print_info(info)
-- finish
return apache2.OK
end
访问Demo
打开Apache，访问http://127.0.0.1/info.php 就能看到
