在OpenWrt中使用socket通訊主要就是呼叫nixio.socket來完成。我們可以寫一個模組，然後在需要使用的時候使用require來引入。

說明：lua是指令碼語言，可在htm檔案內直接使用<%%>進行引用。
閱讀程式碼，其中luci.http是在/usr/lib/lua/luci目錄下安裝自帶的http.lua檔案；luci.resttemplate是我自定義的根據nixio編寫的socket通訊簡單工具類，能訪問遠端的服務，呼叫遠端的介面！
同理，在/usr/lib/lua/luci目錄下建立resttemplate.lua檔案，內容如下：

--resttemplate.lua 
core
 
={}

local h=require "luci.http"
local n=require "nixio"

core.ip="192.168.80.192"
core.port=8080
core.uri="/users"
core.method="GET"
core.charset="UTF-8"
core.rcvTimeout=20

function core.get(name)

end

function core.httpData(data)
--    core.uri=string.upper(core.uri)
    core.uri="/users"
    return core.method.." "..core.uri.." HTTP/1.1\r\n"..
        
 
"Host: "..core.ip..":"..core.port.."\r\n"..
        "Content-type: text/html;charset="..core.charset.."\r\n"..
        "Accept-Language: zh-cn\r\n"..
        "User-Agent: Mozilla/4.0(Compatible win32; MSIE)\r\n"..
        "Content-Length: "..string.len(data).."\r\n"..    
        "Connection: close\r\n\r\n"..
        data
end

 
function core.restData(method,uri,data,ip,port)
    data=data or ""
    method=method or "GET"
    uri=uri or "/"
    return method.." "..uri.." HTTP/1.1\r\n"..
        "Accept: */*\r\n"..
        "Accept-Encoding: gzip, deflate, br\r\n"..
        "Accept-Language: zh-CN,zh;q=0.9\r\n"..
        "Connection: keep-alive\r\n"..
        "Host: "..ip..":"..port.."\r\n"..
        "Content-Length: "..string.len(data).."\r\n"..
        data
end

function core.testget(data)
        
    socket:setopt("socket","rcvtimeo",timeout)
    socket:send(core.httpData(data))
    local tt={}
    repeat
        local tmp=socket:recv(100)
        if tmp==false then
            socket:close()
            return false,"response timeout"
        end
        
        tmp=tostring(tmp)
        local i= #tt
        tt[i+1]=tmp
    until #tmp < 1
    
    socket:close()

    return true,"success 200"
end

function core.send(data)
    local position
    local t={}
    local http
    local socket=nixio.socket("inet","stream")
    local tmp

    if not socket then
        return false, "建立socket失敗"
    end

    if not socket:connect(core.ip,core.port) then
        socket:close()
        return false, "服務無響應，連線伺服器"..core.ip..":"..core.port.."失敗"
    end

    socket:setopt("socket","rcvtimeo",core.rcvTimeout)

    socket:send(core.httpData(data))

    repeat
        tmp=socket:recv(100)
    
        if tmp==false then
            socket:close()
            return false,"響應超時"
        end
        tmp=tostring(tmp)
        t[#t + 1] = tmp
    until #tmp < 1

    socket:close()
    
    local result=table.concat(t)
    
    position=string.find(result,"\r\n\r\n")

    if position==nil then
        return false,"返回的資料格式不合法。資料："..result
    end

    result=string.sub(result,string.find(result,"\r\n\r\n")+4)

    return result
end

--create a socket with ip,port,timeout
function core.socket(ip,port,timeout)
    local socket=nixio.socket("inet","stream")
    if not socket then
        return false,"create socket('inet','stream') failed!"
    end
    if not socket:connect(ip,port) then
        socket:close()
        return false,"connect "..ip..":"..port.." failed!"
    end
    socket:setopt("socket","rcvtimeo",timeout)
    return socket
end

function core.post()

end

return core

使用示例：

    local h=require "luci.http"
    local c=require "luci.resttemplate"
    

--    h.write("Hello World</br>")
--    h.write("測試socket通訊失敗！<Br>")
--    h.write(c.send("luci web's page Client!"))

    h.write(c.send(""))

https://blog.csdn.net/qq_41953807/article/details/106229876