public QuoteData GetSymbolData(string symbol, Action <string> onWebError = null)
{
// try getting from cache
QuoteData quoteCache;
if (_prices.TryGetValue(symbol, out quoteCache))
{
return(quoteCache);
}
QuoteData quoteData = new QuoteData();
// not in cache, get now
var t = DateTime.Today;
var startDate = new DateTime(t.Year - 10, 1, 1);
var fmt = "https://www.alphavantage.co/query?function=TIME_SERIES_DAILY&symbol={0}&apikey=IF6RVQ6S90CZZ7VJ&datatype=csv&outputsize=full";
var url = string.Format(fmt, symbol);
// get content
var sb = new StringBuilder();
var request = System.Net.WebRequest.Create(url);
var task = request.GetResponseAsync(); //where it's exiting
try
{
using (var sr = new StreamReader(task.Result.GetResponseStream()))
{
// skip headers
sr.ReadLine();
// read each line
for (var line = sr.ReadLine(); line != null; line = sr.ReadLine())
{
// append date (field 0) and adjusted close price (field 6)
var items = line.Split(',');
{
Quote q = new Quote(quoteData.ReferenceValue)
{
date = DateTime.Parse(items[0]),
open = Convert.ToDouble(items[1]),
high = Convert.ToDouble(items[2]),
low = Convert.ToDouble(items[3]),
close = Convert.ToDouble(items[4]),
volume = Convert.ToDouble(items[5]),
};
if (q.date < startDate)
{
break;
}
quoteData.Add(q);
}
}
}
}
catch (AggregateException ex)
{
if (onWebError != null)
{
onWebError(ex.Message);
}
else
{
System.Diagnostics.Debug.WriteLine(ex.Message);
}
}
catch (System.Net.WebException ex)
{
if (onWebError != null)
{
onWebError(ex.Message);
}
else
{
System.Diagnostics.Debug.WriteLine(ex.Message);
}
}
FillEvents(symbol, quoteData);
quoteData.Reverse();
_prices[symbol] = quoteData;
return(quoteData);
}
public QuoteData GetSymbolData(string symbol, Action <string> onWebError = null)
{
// try getting from cache
QuoteData quoteCache;
if (_prices.TryGetValue(symbol, out quoteCache))
{
return(quoteCache);
}
QuoteData quoteData = new QuoteData();
DateTime t = DateTime.Today;
DateTime startDate = new DateTime(t.Year - 10, 01, 01);
Stream dataStream = null;
StreamWriter dataCacheStream = null;
// check the file cache as well
FileInfo fileInfo = new FileInfo(symbol + ".dataCache");
if (fileInfo.Exists && fileInfo.LastWriteTime.Date == t)
{
try { dataStream = fileInfo.OpenRead(); }
catch { dataStream = null; }
}
// not in cache, get now
if (dataStream == null)
{
var fmt = "https://www.alphavantage.co/query?function=TIME_SERIES_DAILY&symbol={0}&apikey=IF6RVQ6S90CZZ7VJ&datatype=csv&outputsize=full";
var url = string.Format(fmt, symbol);
try
{
var wc = new System.Net.WebClient();
dataStream = wc.OpenRead(url);
dataCacheStream = fileInfo.CreateText();
}
catch { dataStream = null; }
}
if (dataStream == null)
{
string msg = "Data for \"" + symbol + "\" not available.";
if (fileInfo.Exists)
{
try
{
dataStream = fileInfo.OpenRead();
msg = "New Data for \"" + symbol + "\" not available.\r\n" +
"Using cached data from " +
fileInfo.LastWriteTime.Date.ToShortDateString();
}
catch
{
dataStream = null;
}
}
if (onWebError != null)
{
onWebError(msg);
}
else if (dataStream == null)
{
throw new Exception(msg);
}
if (dataStream == null)
{
return(quoteData);
}
}
try
{
using (var sr = new StreamReader(dataStream))
{
// skip headers
if (dataCacheStream != null)
{
dataCacheStream.WriteLine(sr.ReadLine());
dataCacheStream.WriteLine(sr.ReadLine());
}
else
{
sr.ReadLine();
sr.ReadLine();
}
// read each line
for (var line = sr.ReadLine(); line != null; line = sr.ReadLine())
{
if (dataCacheStream != null)
{
dataCacheStream.WriteLine(line);
}
// append date (field 0) and adjusted close price (field 6)
var items = line.Split(',');
{
Quote q = new Quote(quoteData.ReferenceValue)
{
date = DateTime.Parse(items[0], CultureInfo.InvariantCulture),
open = Convert.ToDouble(items[1], CultureInfo.InvariantCulture),
high = Convert.ToDouble(items[2], CultureInfo.InvariantCulture),
low = Convert.ToDouble(items[3], CultureInfo.InvariantCulture),
close = Convert.ToDouble(items[4], CultureInfo.InvariantCulture),
volume = Convert.ToDouble(items[5], CultureInfo.InvariantCulture),
};
if (q.date < startDate)
{
break;
}
quoteData.Add(q);
}
}
}
}
catch (System.Net.WebException ex)
{
if (onWebError != null)
{
onWebError(ex.Message);
}
else
{
throw ex;
}
}
finally
{
if (dataCacheStream != null)
{
dataCacheStream.Close();
}
}
if (symbol != "SP")
{
FillEvents(symbol, quoteData);
}
quoteData.Reverse();
_prices[symbol] = quoteData;
return(quoteData);
}
