Lua Requires Chilkat v11.4.0+

Finnhub API - Get Stock Quote

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Demonstrates how to get a stock quote from the Finnhub API. Lua

local chilkat = require("chilkat")

-- Replace with your actual Finnhub API key.
local apiKey = "YOUR_FINNHUB_API_KEY"
local symbol = "AAPL"

local http = chilkat.Http.new()

-- This is the URL without params.
local urlWithoutParams = "https://finnhub.io/api/v1/quote"

local req = chilkat.HttpRequest.new()

-- Add params that will be sent in the URL.
req:add_param("symbol", symbol)
req:add_param("token", apiKey)

req.http_verb = "GET"

-- Send the request to get the JSON response.
local resp = chilkat.HttpResponse.new()
local success = http:http_req(urlWithoutParams, req, resp)
if not success then
    print(http.last_error_text)
    return
end

local json = chilkat.JsonObject.new()
resp:get_body_json(json)

local statusCode = resp.status_code
print("response status code: " .. statusCode)

json.emit_compact = false
print(json:emit())

-- Sample result:

-- {
--   "c": 248.8,
--   "d": -4.09,
--   "dp": -1.6173,
--   "h": 255.493,
--   "l": 248.07,
--   "o": 253.9,
--   "pc": 252.89,
--   "t": 1774641600
-- }

if statusCode == 200 then
    -- Add the symbol to the top of the result.
    json:add_string_at(0, "symbol", symbol)

    -- Rename members for clarification.
    json:rename("c", "currentPrice")
    json:rename("d", "change")
    json:rename("dp", "percentChange")
    json:rename("h", "high")
    json:rename("l", "low")
    json:rename("o", "open")
    json:rename("pc", "prevClose")
    json:rename("t", "unixTime")

    print(json:emit())
else
    print("Failed")
end