Http.cs

using System;
using System.Collections.Specialized;
using System.IO;
using System.Net;
using System.Text;
using Newtonsoft.Json;
using DictionaryObject = System.Collections.Generic.Dictionary<string, object>;

namespace WavesCS.Core
{
    public static class Http
    {        
        public static bool Tracing { get; set; }

        private static void Trace(string s)
        {
            if (Tracing)
                Console.WriteLine(s);
        }

        public static string GetString(string url)
        {
            var json = GetJson(url);
            return json.ParseJsonString();
        }                       

        public static DictionaryObject GetObject(string url, params object[] parameters)
        {            
            var json = GetJson(string.Format(url, parameters));            
            return json.ParseJsonObject();
        }
        
        public static DictionaryObject[] GetObjects(string url, params object[] args)
        {
            var json = GetJson(string.Format(url, args));
            return json.ParseJsonObjects();		
        }
        
        public static DictionaryObject[] GetFlatObjects(string url, params object[] args)
        {
            var json = GetJson(string.Format(url, args));
            return json.ParseFlatObjects();            
        }
        
        public static DictionaryObject[] GetObjectsWithHeaders(string url, NameValueCollection headers)
        {
            var json = GetJson(url, headers);            
            return json.ParseJsonObjects();
        }

        public static DictionaryObject[] GetFlatObjectsWithHeaders(string url, NameValueCollection headers)
        {
            var json = GetJson(url, headers);
            return json.ParseFlatObjects();
        }

        public static string GetJson(string url, NameValueCollection headers = null)
        {
            ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;
            Trace($"Getting: {url}");
            var client = new WebClient { Encoding = Encoding.UTF8 };
            if (headers != null)
                client.Headers.Add(headers);
            var remainingTries = 5;
            string result = "";
            do
            {
                --remainingTries;
                try
                {
                    result = client.DownloadString(url);
                }
                catch (Exception ex) { }
            }
            while (remainingTries > 0 && result == "");

            Trace($"Received: {result}");
            return result;
        }
        
        public static string Post(string url, DictionaryObject data, NameValueCollection headers = null)
        {
            return Post(url, data.ToJson(), headers);
        }
        
        public static string Post(string url, DictionaryObject[] data, NameValueCollection headers = null)
        {
            return Post(url, data.ToJson(), headers);
        }
        
        public static string Post(string url, string data, NameValueCollection headers = null)
        {
            try
            {
                var client = new WebClient {Encoding = Encoding.UTF8};
                client.Headers.Add("Content-Type", "application/json");
                client.Headers.Add("Accept", "application/json");
                if (headers != null)
                    client.Headers.Add(headers);                  
                var json = data;
                Trace($"Posting to {url} : {json}");
                var response = client.UploadString(url, json);
                Trace($"Response: {response}");
                return response;
            }
            catch (WebException e)
            {
                Trace($"Exception: {e}");

                var response = new StreamReader(e.Response.GetResponseStream())
                                    .ReadToEnd();

                Trace(response);

                var message = response.ParseJsonObject()["message"].ToString();
                throw new Exception(message);
            }
        }
    }
}