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Putting it all together - get data, save to redis, read back, chart
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#if INTERACTIVE | |
#r "bin/Debug/FSharp.Data.dll" | |
#r "bin/Debug/FSharp.Charting.dll" | |
#r "bin/Debug/ServiceStack.Common.dll" | |
#r "bin/Debug/ServiceStack.Interfaces.dll" | |
#r "bin/Debug/ServiceStack.Text.dll" | |
#r "bin/Debug/ServiceStack.Redis.dll" | |
#load "../packages/FSharp.Charting.0.90.5/FSharp.Charting.fsx" | |
#endif | |
open System.IO | |
open System.Net | |
open System.Threading | |
open System.Collections.Generic | |
open System.Drawing | |
open FSharp.Data | |
open FSharp.Charting | |
open ServiceStack.Common | |
open ServiceStack.Text | |
open ServiceStack.Redis | |
let getHttp (url: string) = | |
let req = System.Net.WebRequest.Create(url) | |
let resp = req.GetResponse() | |
let stream = resp.GetResponseStream() | |
let reader = new StreamReader(stream) | |
let html = reader.ReadToEnd() | |
resp.Close() | |
html | |
type Bitstamp = JsonProvider<""" {"high": "844.00", "last": "714.33", "timestamp": "1386459953", "bid": "713.10", "volume": "81293.11654151", "low": "542.38", "ask": "713.88"} """> | |
let currentPrice() = | |
let tickerJson = getHttp "https://www.bitstamp.net/api/ticker/" | |
let ticker = Bitstamp.Parse(tickerJson) | |
(ticker.Timestamp, ticker.Last) | |
[<CLIMutable>] | |
type BitstampLast = {Id:int64; Timestamp:int; Value:decimal} | |
let redis = new RedisClient("localhost") | |
redis.FlushAll() | |
let redisBitstamp = redis.As<BitstampLast>() | |
for i = 1 to 20 do | |
let cp = currentPrice() | |
let last = {Id = redisBitstamp.GetNextSequence(); Timestamp = fst cp; Value = snd cp} | |
let stored = redisBitstamp.Store(last) | |
printfn "Stored %d %f at %d" stored.Timestamp stored.Value stored.Id | |
Thread.Sleep(31000) | |
let allValues = redisBitstamp.GetAll() | |
[for v in allValues -> (v.Timestamp, v.Value)] | |
|> Chart.Line | |
|> Chart.WithYAxis(Min = 900.0, Max = 1000.0) |
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