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using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;
namespace CSharpExamples
{
class Indicator
{
/// <summary>
/// Store the client key to be used through the program
/// </summary>
static string _clientKey = "guest:guest";
static void Main(string[] args)
{
// set the client key
Console.WriteLine("Provide a API key; otherwise, press ENTER to use the default test key...");
string k = Console.ReadLine();
if (!string.IsNullOrWhiteSpace(k))
_clientKey = k;
// get a list of indicators
Console.WriteLine("About to get all indicators");
var getIndicatorsResult = GetIndicators().Result;
Console.WriteLine(getIndicatorsResult);
// get a list of indicators from a country
Console.WriteLine("About to get a list of indicators of a country");
var getIndicatorsByCountry = GetIndicatorsByCountry("united states").Result;
Console.WriteLine(getIndicatorsByCountry);
// get an indicators from all countries
Console.WriteLine("About to get a indicator for all country");
var getIndicatorsAllCountries = GetIndicatorsAllCountries("gdp").Result;
Console.WriteLine(getIndicatorsAllCountries);
// get historical indicators given countries and indicators
Console.WriteLine("About to get a list of indicator for multiple countries");
var getHistoricalIndicatorsByCountries = GetHistoricalIndicatorsByCountries(new string[] { "united states" }, new string[] { "gdp" }).Result;
Console.WriteLine(getHistoricalIndicatorsByCountries);
// get historical indicators given countries and indicators between start and end dates
Console.WriteLine("About to get a historical list of indicator for multiple countries between start and end dates");
var getHistoricalIndicatorsByCountriesDates = GetHistoricalIndicatorsByCountries(new string[] { "united states" }, new string[] { "gdp" }, new DateTime(2015, 01, 01), new DateTime(2015, 12, 31)).Result;
Console.WriteLine(getHistoricalIndicatorsByCountriesDates);
// get historical data given a ticker
Console.WriteLine("About to get historical data given a ticker");
var getHistoricalByTicker = GetHistorycalByTicker("USURTOT", new DateTime(2015, 03, 01)).Result;
Console.WriteLine(getHistoricalByTicker);
Console.ReadLine();
}
/// <summary>
/// Get all indicators without filters
/// </summary>
/// <returns>A task that will be resolved in a string with the request result</returns>
public async static Task<string> GetIndicators()
{
return await HttpRequester("/indicators");
}
/// <summary>
/// Get a list of indicator form a specific country
/// </summary>
/// <param name="country">Name of the country</param>
/// <returns>A task that will be resolved in a string with the request result</returns>
public async static Task<string> GetIndicatorsByCountry(string country)
{
return await HttpRequester($"/country/{country}");
}
/// <summary>
/// Get a specific indicator for all countries
/// </summary>
/// <param name="indicator">Name of the indicator</param>
/// <returns>A task that will be resolved in a string with the request result</returns>
public async static Task<string> GetIndicatorsAllCountries(string indicator)
{
return await HttpRequester($"/country/all/{indicator}");
}
/// <summary>
/// Get historical indicators given countries, indicators, start and end date
/// </summary>
/// <param name="countries">List of countries</param>
/// <param name="indicators">List of indicators</param>
/// <param name="startDate">Start date</param>
/// <param name="endDate">End date</param>
/// <returns>A task that will be resolved in a string with the request result</returns>
public async static Task<string> GetHistoricalIndicatorsByCountries(string[] countries, string[] indicators, DateTime? startDate = null, DateTime? endDate = null)
{
if (startDate != null && endDate != null)
return await HttpRequester($"/historical/country/{string.Join(",", countries)}/indicator/{string.Join(",", indicators)}/{startDate.Value.ToString("yyyy-MM-dd")}/{endDate.Value.ToString("yyyy-MM-dd")}");
return await HttpRequester($"/historical/country/{string.Join(",", countries)}/indicator/{string.Join(",", indicators)}");
}
/// <summary>
/// Get historical indicator data using the ticker
/// </summary>
/// <param name="ticker">Ticker</param>
/// <param name="startDate">Start date if needed</param>
/// <returns>A task that will be resolved in a string with the request result</returns>
public async static Task<string> GetHistorycalByTicker(string ticker, DateTime? startDate)
{
if (startDate != null)
return await HttpRequester($"/historical/ticker/{ticker}/{startDate.Value.ToString("yyyy-MM-dd")}");
return await HttpRequester($"/ihstorical/ticker/{ticker}");
}
/// <summary>
/// Method to make HTTP calls to TradingEconomics API
/// </summary>
/// <param name="url">The URL to fetch</param>
/// <param name="baseURL">The base path, the default is 'https://api.tradingeconomics.com/'</param>
/// <returns>A task tha will be resolved in a string with the content of the response</returns>
public async static Task<string> HttpRequester(string url, string baseURL = "https://api.tradingeconomics.com/")
{
try
{
using (var client = new HttpClient())
{
client.BaseAddress = new Uri(baseURL);
client.DefaultRequestHeaders.Clear();
//ADD Acept Header to tell the server what data type you want
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/xml"));
//ADD Authorization
AuthenticationHeaderValue auth = new AuthenticationHeaderValue("Client", _clientKey);
client.DefaultRequestHeaders.Authorization = auth;
HttpResponseMessage response = await client.GetAsync(url);
response.EnsureSuccessStatusCode();
return await response.Content.ReadAsStringAsync();
}
}
catch (Exception e)
{
return $"Error at HttpRequester with msg: {e}";
}
}
}
}
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