B4X

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. B4X

Dim success As Boolean = False

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

Dim rest As ChilkatRest
rest.Initialize("rest")

'  Connect to the REST server.
Dim bTls As Boolean = True
Dim port As Int = 443
Dim bAutoReconnect As Boolean = True
success = rest.Connect("www.alphavantage.co", port, bTls, bAutoReconnect)
If success <> True Then
    Log(rest.LastErrorText)
    Return
End If


'  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.AddQueryParam("function", "TIME_SERIES_DAILY")
success = rest.AddQueryParam("symbol", "AAPL")
success = rest.AddQueryParam("apikey", "my_api_key")
Dim responseJson As String = rest.FullRequestNoBody("GET", "/query")
If rest.LastMethodSuccess <> True Then
    Log(rest.LastErrorText)
    Return
End If


Log(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"
'          }
'      }
'  }