Lua

Simple REST Example

See more REST Examples

Demonstrates a very simple RESTful API call to get a stock time series daily (quotes) from Alpha Vantage. Lua

local chilkat = require("chilkat")

-- This example requires the Chilkat API to have been previously unlocked.
-- See Global Unlock Sample for sample code.

local rest = chilkat.Rest.new()

-- Connect to the REST server.
local bTls = true
local port = 443
local bAutoReconnect = true
local success = rest:connect("www.alphavantage.co", port, bTls, bAutoReconnect)
if not success then
    print(rest.last_error_text)
    return
end

-- Get a stock quote:
-- Sending GET request to https://www.alphavantage.co/query?function=TIME_SERIES_DAILY&symbol=MSFT&apikey=my_api_key
success = rest:add_query_param("function", "TIME_SERIES_DAILY")
success = rest:add_query_param("symbol", "AAPL")
success = rest:add_query_param("apikey", "my_api_key")
local responseJson = rest:full_request_no_body("GET", "/query")
if not rest.last_method_success then
    print(rest.last_error_text)
    return
end

print(responseJson)

-- Sample response:
-- {
--     "Meta Data": {
--         "1. Information": "Daily Prices (open, high, low, close) and Volumes",
--         "2. Symbol": "AAPL",
--         "3. Last Refreshed": "2019-12-06",
--         "4. Output Size": "Compact",
--         "5. Time Zone": "US/Eastern"
--     },
--     "Time Series (Daily)": {
--         "2019-12-06": {
--             "1. open": "267.4800",
--             "2. high": "271.0000",
--             "3. low": "267.3000",
--             "4. close": "270.7100",
--             "5. volume": "25447644"
--         },
--         "2019-12-05": {
--             "1. open": "263.7900",
--             "2. high": "265.8900",
--             "3. low": "262.7300",
--             "4. close": "265.5800",
--             "5. volume": "18661343"
--         },
--         "2019-12-04": {
--             "1. open": "261.0700",
--             "2. high": "263.3100",
--             "3. low": "260.6800",
--             "4. close": "261.7400",
--             "5. volume": "16810388"
--         },
-- ...
--         "2019-07-18": {
--             "1. open": "204.0000",
--             "2. high": "205.8800",
--             "3. low": "203.7000",
--             "4. close": "205.6600",
--             "5. volume": "18582161"
--         }
--     }
-- }