ngx_lua_module是一个nginx http模块,它把lua解析器内嵌到nginx,用来解析并执行lua语言编写的网页后台脚本。

特性:

*) 支持Windows和Linux平台。

*) 支持高并发高性能。

*) HTML网页中内嵌LUA脚本代码,类似于PHP。

*) 支持非阻塞的数据库操作,目前只支持MYSQL。

*) 支持异步的文件IO操作。

*) 支持非阻塞的SOCKET IO操作。

 

API简介:

*) nginx 表

    提供一些实用函数,例如URI转换、BASE64编解码、CRC校验、MURMURHASH2、MD5和SHA1。
    具体用法请查看下面示例代码。

*) nginx.database 表

    提供数据库操作的接口,这些接口的内部实现是基于非阻塞模式的,

    因此不会阻塞Nginx的事件处理,可以支持比较高的并发。

    具体用法请查看下面示例代码。

*) nginx.file 表

    提供文件操作的接口,这些接口的内部实现是基于异步IO模式的,

    因此不会阻塞Nginx的事件处理,可以支持比较高的并发。

    具体用法请查看下面示例代码。

*) nginx.logger 表

    Nginx日志接口的封装,允许在LUA代码中写日志信息到Nginx的日志文件。

    具体用法请查看下面示例代码。

*) nginx.request 表

    提供与HTTP请求有关的接口,可以获取请求参数、请求头和Cookie值,等等。

    具体用法请查看下面示例代码。

*) nginx.response 表
    提供与HTTP响应有关的接口。

    具体用法请查看下面示例代码。

*) nginx.socket 表

    提供SOCKET操作的接口,这些接口的内部实现是基于非阻塞IO模式的,

    因此不会阻塞Nginx的事件处理,可以支持比较高的并发。

    具体用法请查看下面示例代码。

*) nginx.variable 表

    提供接口给LUA代码以获取Nginx的HTTP变量。

    具体用法请查看下面示例代码。

 

TODO:

*) API说明文档。

*) 更多实用功能的LUA表和接口实现,

    例如多台机器之间会话(Session)共享的透明处理。

 

 

 

示例代码:

index.lsp

<%
local req = nginx.request

--local name = req["name"]
--local name = req.name

if req.method == req.GET then
  name = req.get["name"]
  name = req.get.name
else
  name = req.post["name"]
  name = req.post.name
end

name = name or "world"
%>
<html>
<head><title>hello, <%=name%>!</title></head>
<body>
hello, <%=name%>!
<hr>
<form action="index.lsp" method="post">
<input type="text" name="name"/>
<input type="submit" value="submit"/>
</form>
</body>
</html>

test_core.lsp

<%
local nginx = nginx
%>
<html>
<head>
</head>
<body>
<%
local uri = "id=你好&title=世界"
local escaped_uri = nginx.escape_uri(uri)
local unescaped_uri = nginx.unescape_uri(escaped_uri)
local str = "dsdsdtdkslddfsdfdffdfsdfsdfweijqawlkrklekefwklksldksksd"
local encoded_base64 = nginx.encode_base64(str)
local decoded_base64 = nginx.decode_base64(encoded_base64)
local crc16 = nginx.crc16(str) or "crc16 error";
local crc32 = nginx.crc32(str) or "crc32 error";
local murmur_hash2 = nginx.murmur_hash2(str) or "murmur_hash2 error"
local md5 = nginx.md5(str) or "md5 error"
local sha1 = nginx.sha1(str) or "sha1 error"
%>
URI escape test<br/><%=uri%><br/><%=escaped_uri%>
<hr>
URI unescape test<br/><%=escaped_uri%><br/><%=unescaped_uri%>
<hr>
BASE64 encode test<br/><%=str%><br/><%=encoded_base64%>
<hr>
BASE64 decode test<br/><%=encoded_base64%><br/><%=decoded_base64%>
<hr>
CRC16 test<br/><%=str%><br/><%=crc16%>
<hr>
CRC32 test<br/><%=str%><br/><%=crc32%>
<hr>
MURMURHASH2 test<br/><%=str%><br/><%=murmur_hash2%>
<hr>
MD5 test<br/><%=str%><br/><%=md5%>
<hr>
SHA1 test<br/><%=str%><br/><%=sha1%>
</body>
</html>

 

test_database.lsp

<%
local print = print
local nginx = nginx
local req = nginx.request
local db = nginx.database

local res = db.execute({
  driver = "libdrizzle",
  host = "127.0.0.1",
  port = 3306,
  user = "root",
  password = "123456",
  database = "mysql",
  sql = "show databases"
})
%>
<html>
<head>
</head>
<body>
err: <%=res.err%>
<br/>
errstr: <%=res.errstr%>
<br/>
col_count: <%=res.col_count or ""%>
<br/>
row_count: <%=res.row_count or ""%>
<br/>
affected_rows: <%=res.affected_rows or ""%>
<br/>
insert_id: <%=res.insert_id or ""%>
<br/>
<% if res.err ~= 0 then print("error") return end %>
<hr>
<table border="1">
<tr>
  <% for i=1,#res.columns do %>
  <td><b><%=res.columns[i]%></b></td>
  <% end %>
</tr>
<% for r=1,#res.rows do %>
<tr>
  <% for i=1,#res.rows[r] do %>
  <td><%=res.rows[r][i]%></td>
  <% end %>
</tr>
<% end %>
</table>
<hr>
request_time: <%=req.request_time%>ms
</body>
</html>

 

test_file.lsp

<%
local nginx = nginx
local file = nginx.file
%>
<html>
<head>
</head>
<body>
<% local f = file.open("c:/test.txt") %>
<% local n,res = f:read() %>
n: <%=n%>
<br/>
res: <%=res%>
<hr>
<% local n,err = f:write("kdkdksldskdlsdkkkkkkkkkkkkkkkkkkkkkkkkkk") %>
n: <%=n%>
<br/>
err: <%=err or ""%>
<hr>
<% f:close() %>
</body>
</html>

 

test_logger.lsp

<%
local print = print
local nginx = nginx
local log = nginx.logger
%>
<html>
<head>
</head>
<body>
<%
-- writing some messages into the log file of the nginx
log.error(log.ALERT, "test alert" .. 1 .. 10)
log.debug(log.DEBUG_HTTP, "test debug http")
log.error(log.ERR, "test error")
log.error(log.EMERG, 1000)
%>
please opening the log file of the nginx to view messages.
</body>
</html>

test_request.lsp

<%
local print = print
local nginx = nginx
local req = nginx.request

local get_req_members = function()
  return {
    uri = req.uri,
    args = req.args,
    host = req.host,
    exten = req.exten,
    method = req.method,
    referer = req.referer,
    user_agent = req.user_agent,
    method_name = req.method_name,
    request_time = req.request_time .. "ms",
    request_line = req.request_line,
    unparsed_uri = req.unparsed_uri,
    http_protocol = req.http_protocol
  }
end

function get_headers_members()
  local headers = req.headers
  return {
    host = headers.host,
    user_agent = headers.user_agent
  }
end
%>
<html>
<head>
</head>
<body>
<table border="1">
<% for k,v in pairs(get_req_members()) do %>
<tr><td><%=k%></td><td><%=v%></td></tr>
<% end %>
</table>
<hr>
<table border="1">
<% for k,v in pairs(get_headers_members()) do %>
<tr><td><%=k%></td><td><%=v%></td></tr>
<% end %>
</table>
<%
-- TODO: test the table "req.cookies"
%>
<hr>
<%
local one = req["one"] or 1
local two = req.two or 2
local three = req.get["three"] or 3
local four = req.get.four or 4
%>
hello, <%=one%><%=two%><%=three%><%=four%>!
</body>
</html>

test_response.lsp

<%
local print = print
local nginx = nginx
local req = nginx.request
local resp = nginx.response
resp.content_type = "text/html"
%>
<html>
<head><title></title></head>
<body>
<%
local one = req["one"] or 1
local two = req.two or 2
local three = req.post["three"] or 3
local four = req.post.four or 4
%>
hello, <%=one%><%=two%><%=three%><%=four%>!
<hr>
<form action="test_response.lsp" method="post">
<input type="text" name="one"/>
<input type="text" name="two"/>
<input type="text" name="three"/>
<input type="text" name="four"/>
<input type="submit" value="submit"/>
</form>
<hr>
</body>
</html>

 

test_socket.lsp

<%
local nginx = nginx
local resp = nginx.response
local socket = nginx.socket
resp.content_type = "text/html"
%>
<% local s = socket.open("www.nginx.org", 80) %>
<%=s:send("GET / HTTP/1.1\r\nHost: www.nginx.org\r\n\r\n") or "send error"%>
<hr>
<% local n,res = s:recv() %>
<%=n or "recv error"%>
<hr>
<%=res or "recv error"%>
<hr>
<% n,res = s:recv() %>
<%=n or "recv error"%>
<hr>
<%=res or "recv error"%>
<hr>
<% n,res = s:recv() %>
<%=n or "recv error"%>
<hr>
<%=res or "recv error"%>
<% s:close() %>

test_variable.lsp

<%
local print = print
local nginx = nginx
local var = nginx.variable
local array = {
  --var.arg_PARAMETER or "",
  args = var.args or "",
  binary_remote_addr = var.binary_remote_addr or "",
  body_bytes_sent = var.body_bytes_sent or "",
  content_length = var.content_length or "",
  content_type = var.content_type or "",
  --var.cookie_COOKIE or "",
  document_root = var.document_root or "",
  document_uri = var.document_uri or "",
  host = var.host or "",
  hostname = var.hostname or "",
  --var.http_HEADER or "",
  user_agent = var.http_user_agent or "",
  is_args = var.is_args or "",
  limit_rate = var.limit_rate or "",
  nginx_version = var.nginx_version or "",
  query_string = var.query_string or "",
  remote_addr = var.remote_addr or "",
  remote_port = var.remote_port or "",
  remote_user = var.remote_user or "",
  request_filename = var.request_filename or "",
  request_body = var.request_body or "",
  request_body_file = var.request_body_file or "",
  request_completion = var.request_completion or "",
  request_method = var.request_method or "",
  request_uri = var.request_uri or "",
  scheme = var.scheme or "",
  server_addr = var.server_addr or "",
  server_name = var.server_name or "",
  server_port = var.server_port or "",
  server_protocol = var.server_protocol or "",
  uri = var.uri or ""
}
%>
<html>
<head>
</head>
<body>
<%=#array%>
<hr>
<table border="1">
<% for k,v in pairs(array) do %>
<tr><td><%=k%></td><td><%=v%></td></tr>
<% end %>
</table>
</body>
</html>