local curl = require("luacurl")

local function postJson(url,postData,c)
    local result = { }
    if c == nil then
        c = curl.new()
    end
    c:setopt(curl.OPT_URL, url)
    c:setopt(curl.OPT_SSL_VERIFYHOST,0)
    c:setopt(curl.OPT_SSL_VERIFYPEER,false)
    c:setopt(curl.OPT_POST,true)
    c:setopt(curl.OPT_HTTPHEADER, "Content-Type: application/json")
    c:setopt(curl.OPT_POSTFIELDS, postData)
    c:setopt(curl.OPT_WRITEDATA, result)
    c:setopt(curl.OPT_WRITEFUNCTION, function(tab, buffer)
        table.insert(tab, buffer)
        return #buffer
    end)
    local ok = c:perform()
    return ok, table.concat(result)
end

 local ok,html = postJson(serverUrl,data);
        if ok then
            ngx.say(html)
        end