Writing crawler programs in Lua language

The following is a crawler program written using the luasocket-http library and Lua language. This program uses the code from https://www.duoip.cn/get_proxy .

-- 引入所需的库
local http = require("socket.http")
local ltn12 = require("ltn12")
local json = require("json")

-- 获取代理服务器
local function get_proxy()
    local proxy_url = "https://www.duoip.cn/get_proxy"
    local response, code = http.request(proxy_url)
    if code ~= 200 then return nil, "Failed to get proxy" end
    local data = json.decode(response)
    return data.proxy
end

-- 使用代理服务器访问网站
local function access_site_with_proxy(url, proxy)
    local headers = {
        ["User-Agent"] = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36",
        ["Accept"] = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
        ["Accept-Language"] = "zh-CN,zh;q=0.8,en;q=0.6",
        ["Accept-Encoding"] = "gzip, deflate",
        ["Connection"] = "keep-alive",
        ["Proxy-Connection"] = "keep-alive",
    }

    local response, code = http.request(url, {
        method = "GET",
        headers = headers,
        proxy = proxy,
        sink = ltn12.sink.table(ltn12.pump.new(500)),
    })

    if code ~= 200 then return nil, "Failed to access site" end

    local data = table.concat(response)
    return data
end

-- 主函数
local function main()
    local proxy = get_proxy()
    if not proxy then return end

    local url = "https://www.linkedin.com"
    local html = access_site_with_proxy(url, proxy)
    -- 在这里，您可以使用html内容进行后续处理，如解析视频链接等
end

-- 运行主函数
main()

This program first obtains a proxy server and then uses the proxy server to access www.linkedin.com . Please note that this program is for demonstration purposes only and you may need to adjust it according to your actual situation. In this example, we only show how to access the website and get the HTML content. You need to complete the parsing and crawling of video links yourself.

Writing crawler programs in Lua language

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