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lcurl

lcurl manual

URIEncode and URIDecode​

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

Note: Uses sys.alert

Example: simulate httpGet from TouchSprite​

function httpGet(url) -- also works for ftp (this function is built-in; shown here only as lcurl usage)
    if (url:sub(1, 6) ~= "ftp://" and
        url:sub(1, 7) ~= "https://" and
        url:sub(1, 8) ~= "https://") 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

Note: Uses table.concat