Create API for price data.

Backend.cs

@@ -0,0 +1,43 @@
+using Backend.ServiceHander;
+using Microsoft.AspNetCore.HttpOverrides;
+
+var builder = WebApplication.CreateBuilder(args);
+
+builder.Services.AddControllers();
+builder.Services.AddEndpointsApiExplorer();
+builder.Services.AddSwaggerGen();
+
+builder.Services.AddSingleton<MarketDataService>();
+
+builder.Services.AddCors(options =>
+{
+	options.AddPolicy("Frontend", policy =>
+	{
+		policy
+			// ---- DEVELOPMENT ----
+			.AllowAnyOrigin()
+			// ---- PRODUCTION ----
+			// .WithOrigins("https://app.dongfeng-systems.org") 
+			.AllowAnyHeader()
+			.AllowAnyMethod();
+	});
+});
+
+builder.Services.Configure<ForwardedHeadersOptions>(options =>
+{
+	options.ForwardedHeaders =
+		ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto;
+});
+
+var app = builder.Build();
+
+app.UseSwagger();
+app.UseSwaggerUI();
+
+app.UseForwardedHeaders();
+app.UseHttpsRedirection();
+
+app.UseCors("Frontend");
+app.MapControllers();
+
+app.Run();

Backend.csproj

@@ -10,5 +10,10 @@
   <ItemGroup>
     <ProjectReference Include="../twsapi/CSharpAPI.csproj" />
   </ItemGroup>
+
+
+  <ItemGroup>
+    <PackageReference Include="Swashbuckle.AspNetCore" Version="10.1.5" />
+  </ItemGroup>
   
 </Project>

Controller/MarketDataController.cs

@@ -0,0 +1,89 @@
+using Backend.ServiceHander;
+using Backend.MarketDataRequest;
+using Microsoft.AspNetCore.Mvc;
+using IBApi;
+
+namespace BackendApi.Controller
+{
+	[ApiController]
+	[Route("api/market")]
+	public class MarketController : ControllerBase
+	{
+		private readonly MarketDataService _marketDataService;
+
+		public MarketController(MarketDataService marketDataService)
+		{
+			_marketDataService = marketDataService;
+		}
+
+		[HttpGet("live/{symbol}")]
+		public IActionResult GetLive(string symbol)
+		{
+			try
+			{
+				var data = _marketDataService.GetLiveQuote(symbol.ToUpperInvariant());
+				return Ok(data);
+			}
+			catch (Exception ex)
+			{
+				return StatusCode(500, new { error = ex.ToString() });
+			}
+		}
+
+		[HttpGet("historical")]
+		public IActionResult GetHistorical(
+			[FromQuery] string symbol,
+			[FromQuery] string endDateTime,
+			[FromQuery] string duration,
+			[FromQuery] HistoricalBarSize barSize,
+			[FromQuery] HistoricalWhatToShow whatToShow = HistoricalWhatToShow.Trades,
+			[FromQuery] bool useRth = true)
+		{
+			try
+			{
+				var data = _marketDataService.GetHistorical(
+					symbol.ToUpperInvariant(),
+					endDateTime,
+					duration,
+					barSize,
+					whatToShow,
+					useRth
+				);
+
+				return Ok(data);
+			}
+			catch (Exception ex)
+			{
+				return StatusCode(500, new { error = ex.ToString() });
+			}
+		}
+
+		[HttpGet("historical-line")]
+		public IActionResult GetHistoricalLine(
+	[FromQuery] string symbol,
+	[FromQuery] string endDateTime,
+	[FromQuery] string duration,
+	[FromQuery] HistoricalBarSize barSize,
+	[FromQuery] HistoricalWhatToShow whatToShow = HistoricalWhatToShow.Trades,
+	[FromQuery] bool useRth = true)
+		{
+			try
+			{
+				var data = _marketDataService.GetHistoricalLine(
+					symbol.ToUpperInvariant(),
+					endDateTime,
+					duration,
+					barSize,
+					whatToShow,
+					useRth
+				);
+
+				return Ok(data);
+			}
+			catch (Exception ex)
+			{
+				return StatusCode(500, new { error = ex.ToString() });
+			}
+		}
+	}
+}

MarketDataRequest/HistoricalEquityRequest.cs

@@ -6,7 +6,9 @@ namespace Backend.MarketDataRequest
 		FiveMins,
 		FifteenMins,
 		OneHour,
-		OneDay
+		OneDay,
+		FiveDays,
+		OneMonth
 	}
 
 	public enum HistoricalWhatToShow
@@ -17,6 +19,12 @@ namespace Backend.MarketDataRequest
 		Midpoint
 	}
 
+	public sealed class HistoricalLinePoint
+	{
+		public string Timestamp { get; init; } = string.Empty;
+		public double Price { get; init; }
+	}
+
 	public sealed class HistoricalEquityRequest
 	{
 		public int RequestId { get; init; }
@@ -62,6 +70,8 @@ namespace Backend.MarketDataRequest
 			HistoricalBarSize.FifteenMins => "15 mins",
 			HistoricalBarSize.OneHour => "1 hour",
 			HistoricalBarSize.OneDay => "1 day",
+			HistoricalBarSize.FiveDays => "5 days",
+			HistoricalBarSize.OneMonth => "1 month",
 			_ => throw new ArgumentOutOfRangeException(nameof(BarSize))
 		};
 

Program.cs

@@ -1,100 +0,0 @@
-using Backend.MarketDataRequest;
-using IBApi;
-using System;
-using System.Collections.Generic;
-using System.Threading;
-
-namespace Backend
-{
-	public static class Program
-	{
-		public static void Main(string[] args)
-		{
-			var Gateway = new IBGatewayControl();
-			try
-			{
-				Gateway.Start("127.0.0.1", 4002, 1);
-			}
-			catch
-			{
-				Console.WriteLine("Invalid connection to IB Gateway. Please ensure gateway is running and connected.");
-				Environment.Exit(1);
-			}
-
-			while (!Gateway.IsApiReady)
-			{
-				Thread.Sleep(50);
-			}
-
-			// ---- TEST HISTORICAL DATA REQUEST ----
-
-			var HistoricalRequest = new HistoricalEquityRequest
-			{
-				RequestId = 1,
-				Symbol = "NVDA",
-				EndDateTime = "20260311 11:00:00 US/Eastern",
-				Duration = "3600 S",
-				BarSize = HistoricalBarSize.FiveMins,
-				WhatToShow = HistoricalWhatToShow.Trades,
-				UseRth = true,
-				KeepUpToDate = false,
-				FormatDate = 1
-			};
-
-			List<Bar> Bars = Gateway.RequestHistoricalBlocking(HistoricalRequest, TimeSpan.FromSeconds(15));
-
-			Console.WriteLine();
-			Console.WriteLine($"Received {Bars.Count} bars. Continue program here.");
-
-			// ---- TEST LIVE DATA REQUEST ----
-
-			var liveRequest = new LiveEquityRequest
-			{
-				RequestId = 2,
-				Symbol = "NVDA"
-			};
-
-			var live = Gateway.RequestLiveEquityBlocking(
-				liveRequest,
-				TimeSpan.FromSeconds(15));
-
-			Console.WriteLine();
-			Console.WriteLine("=== Live Quote ===");
-			Console.WriteLine($"Symbol:         {live.Symbol}");
-			Console.WriteLine($"Last Price:     {live.LastPrice}");
-			Console.WriteLine($"Volume:         {live.Volume}");
-			Console.WriteLine($"Previous Close: {live.PreviousClose}");
-			Console.WriteLine($"Open:           {live.Open}");
-
-
-			// ---- FUNDAMENTALS DATA REQUEST ----
-			// DOES NOT WORK, NEEDS EXTRA DATA SUBSCRIPTION
-/*
-			var fundamentalsRequest = new FundamentalsEquityRequest
-			{
-				RequestId = 3,
-				Symbol = "NVDA"
-			};
-
-			try
-			{
-				var fundamentals = Gateway.RequestFundamentalsBlocking(
-					fundamentalsRequest,
-					TimeSpan.FromSeconds(15));
-
-				Console.WriteLine();
-				Console.WriteLine("=== Fundamentals ===");
-				Console.WriteLine($"Symbol:         {fundamentals.Symbol}");
-				Console.WriteLine($"Market Cap:     {fundamentals.MarketCap}");
-				Console.WriteLine($"P/E Ratio:      {fundamentals.PERatio}");
-				Console.WriteLine($"Dividend Yield: {fundamentals.DividendYield}");
-			}
-			catch (Exception ex)
-			{
-				Console.WriteLine($"Fundamentals request failed.");
-			}
-*/
-			Gateway.Disconnect();
-		}
-	}
-}

Properties/launchSettings.json

@@ -5,7 +5,7 @@
       "commandName": "Project",
       "dotnetRunMessages": true,
       "launchBrowser": true,
-      "applicationUrl": "http://localhost:5246",
+      "applicationUrl": "http://localhost:5000",
       "environmentVariables": {
         "ASPNETCORE_ENVIRONMENT": "Development"
       }
@@ -14,7 +14,7 @@
       "commandName": "Project",
       "dotnetRunMessages": true,
       "launchBrowser": true,
-      "applicationUrl": "https://localhost:7039;http://localhost:5246",
+      "applicationUrl": "https://localhost:7039;http://localhost:5000",
       "environmentVariables": {
         "ASPNETCORE_ENVIRONMENT": "Development"
       }

ServiceHandler/MarketDataHander.cs

@@ -0,0 +1,113 @@
+using Backend.MarketDataRequest;
+using IBApi;
+
+namespace Backend.ServiceHander
+{
+	public sealed class MarketDataService
+	{
+		private readonly IBGatewayControl Gateway;
+		private int NextRequestId = 1;
+		private readonly object Lock = new();
+
+		public MarketDataService()
+		{
+			Gateway = new IBGatewayControl();
+			try
+			{
+				Gateway.Start("127.0.0.1", 4002, 1);
+			}
+			catch
+			{
+				Console.WriteLine("Invalid connection to IB Gateway. Please ensure gateway is running and connected.");
+				Environment.Exit(1);
+			}
+		}
+
+		private int GetNextRequestId()
+		{
+			lock (Lock)
+			{
+				return NextRequestId++;
+			}
+		}
+
+		public LiveEquitySnapshot GetLiveQuote(string Symbol) //
+		{
+			var Request = new LiveEquityRequest
+			{
+				RequestId = GetNextRequestId(),
+				Symbol = Symbol,
+				SecType = "STK",
+				Exchange = "SMART",
+				PrimaryExchange = "NASDAQ",
+				Currency = "USD",
+				RegulatorySnapshot = false
+			};
+
+			return Gateway.RequestLiveEquityBlocking(Request, TimeSpan.FromSeconds(10));
+		}
+
+		public List<object> GetHistorical(string symbol, string endDateTime, string duration, HistoricalBarSize barSize, HistoricalWhatToShow whatToShow = HistoricalWhatToShow.Trades, bool useRth = true)
+		{
+			var Request = new HistoricalEquityRequest
+			{
+				RequestId = GetNextRequestId(),
+				Symbol = symbol,
+				EndDateTime = endDateTime,
+				Duration = duration,
+				BarSize = barSize,
+				WhatToShow = whatToShow,
+				UseRth = useRth,
+				KeepUpToDate = false,
+				FormatDate = 1
+			};
+
+			var Bars = Gateway.RequestHistoricalBlocking(Request, TimeSpan.FromSeconds(20));
+
+			return Bars.Select(b => new
+			{
+				time = b.Time,
+				open = b.Open,
+				high = b.High,
+				low = b.Low,
+				close = b.Close,
+				volume = b.Volume
+			}).Cast<object>().ToList();
+		}
+
+		public List<object> GetHistoricalLine(string symbol, string endDateTime, string duration, HistoricalBarSize barSize, HistoricalWhatToShow whatToShow = HistoricalWhatToShow.Trades, bool useRth = true)
+		{
+			var Request = new HistoricalEquityRequest
+			{
+				RequestId = GetNextRequestId(),
+				Symbol = symbol,
+				EndDateTime = endDateTime,
+				Duration = duration,
+				BarSize = barSize,
+				WhatToShow = whatToShow,
+				UseRth = useRth,
+				KeepUpToDate = false,
+				FormatDate = 1
+			};
+
+			var Bars = Gateway.RequestHistoricalBlocking(Request, TimeSpan.FromSeconds(20));
+
+			return Bars.Select(b => new
+			{
+				timestamp = b.Time,
+				price = b.Close,
+				volume = b.Volume
+			}).Cast<object>().ToList();
+		}
+
+		public void Dispose()
+		{
+			Gateway.Dispose();
+		}
+
+		public void Disconnect()
+		{
+			Gateway.Disconnect();
+		}
+	}
+}