Lua api: Support

Signed-off-by: Jianhui Zhao <jianhuizhao329@gmail.com>

example/lua/helloworld.lua

@@ -0,0 +1,59 @@
+#!/usr/bin/env lua
+
+--[[
+  Copyright (C) 2017 Jianhui Zhao <jianhuizhao329@gmail.com>
+ 
+  This program is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+ 
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+ 
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+  USA
+ --]]
+
+local uloop = require "uloop"
+local uh = require "uhttpd"
+
+local port = 8914
+
+uloop.init()
+
+print("uhttpd version:", uh.VERSION)
+
+local srv = uh.new(port)
+
+print("Listen on:", port)
+
+srv:add_action("/lua", function(cl, opt)
+    uh.send_header(cl, 200, "OK", -1)
+    uh.append_header(cl, "Myheader", "Hello")
+    uh.header_end(cl)
+
+    uh.chunk_send(cl, string.format("<h1>Hello Libuhttpd %s</h1>", uh.VERSION))
+    uh.chunk_send(cl, string.format("<h1>REMOTE_ADDR: %s</h1>", opt.peer_addr))
+    uh.chunk_send(cl, string.format("<h1>METHOD: %s</h1>", opt.method))
+    uh.chunk_send(cl, string.format("<h1>HTTP Version: %s</h1>", opt.version))
+    uh.chunk_send(cl, string.format("<h1>URL: %s</h1>", opt.url))
+    uh.chunk_send(cl, string.format("<h1>QUERY: %s</h1>", opt.query))
+    uh.chunk_send(cl, string.format("<h1>Body: %s</h1>", opt.body and opt.body or ""))
+
+    for k, v in pairs(opt.vars) do
+        uh.chunk_send(cl, string.format("<h1>%s: %s</h1>", k, v))
+    end
+
+    for k, v in pairs(opt.headers) do
+        uh.chunk_send(cl, string.format("<h1>%s: %s</h1>", k, v))
+    end
+
+    uh.request_done(cl)
+end)
+
+uloop.run()