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lcurl 模块

lcurl 手册地址

URL 百分号编解码（escape / unescape）​

关键词：URL 编码、URI 编码、百分号编码、URLEncode、URLDecode、URLEscape、PercentEscape

local curl = require('lcurl')
local e = curl.easy()
--
print(e:escape('abcd$%^&*()'))                 -- 输出 "abcd%24%25%5E%26%2A%28%29"
--
print(e:unescape('abcd%24%25%5E%26%2A%28%29')) -- 输出 "abcd$%^&*()"
--
sys.alert(print.out())

注：上述代码中使用了非本章函数 sys.alert

基于 lcurl 实现的 httpGet 示例​

function httpGet(url) -- 也能请求 ftp 资源 (该函数已内置，此处仅用于演示 lcurl 的用法)
    if (url:sub(1, 6) ~= "ftp://" and
        url:sub(1, 8) ~= "https://" and
        url:sub(1, 7) ~= "http://") then
        url = "https://"..url
    end
    local curl = require("curl.safe")
    local buffer_t = {}
    local write_f = function(s)
        buffer_t[#buffer_t + 1] = s
    end
    local noerr, err = pcall(function()
        curl.easy()
            :setopt(curl.OPT_URL, url)
            :setopt(curl.OPT_CONNECTTIMEOUT, 60)
            :setopt_writefunction(write_f)
        :perform()
    end)
    if (noerr) then
        return table.concat(buffer_t)
    else
        return nil, err
    end
end

注：上述代码中使用了非本章函数 table.concat