Adding REST services as seen on nikprog.hu

WD7UVN_HFT_2023241.Client/RestService.cs

@@ -0,0 +1,153 @@
+using System;
+using System.Collections.Generic;
+using System.Net;
+using System.Net.Http;
+
+namespace WD7UVN_HFT_2023241.Client
+{
+    class RestService
+    {
+        HttpClient client;
+
+        public RestService(string baseurl, string pingableEndpoint = "api")
+        {
+            bool isOk = false;
+            do
+            {
+                isOk = Ping(baseurl + pingableEndpoint);
+            } while (isOk == false);
+            Init(baseurl);
+        }
+
+        private bool Ping(string url)
+        {
+            try
+            {
+                WebClient wc = new WebClient();
+                wc.DownloadData(url);
+                return true;
+            }
+            catch
+            {
+                return false;
+            }
+        }
+
+        private void Init(string baseurl)
+        {
+            client = new HttpClient();
+            client.BaseAddress = new Uri(baseurl);
+            client.DefaultRequestHeaders.Accept.Clear();
+            client.DefaultRequestHeaders.Accept.Add(
+                new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue
+                ("application/json"));
+            try
+            {
+                client.GetAsync("").GetAwaiter().GetResult();
+            }
+            catch (HttpRequestException)
+            {
+                throw new ArgumentException("Endpoint is not available!");
+            }
+
+        }
+
+        public List<T> Get<T>(string endpoint)
+        {
+            List<T> items = new List<T>();
+            HttpResponseMessage response = client.GetAsync(endpoint).GetAwaiter().GetResult();
+            if (response.IsSuccessStatusCode)
+            {
+                items = response.Content.ReadAsAsync<List<T>>().GetAwaiter().GetResult();
+            }
+            else
+            {
+                var error = response.Content.ReadAsAsync<RestExceptionInfo>().GetAwaiter().GetResult();
+                throw new ArgumentException(error.Msg);
+            }
+            return items;
+        }
+
+        public T GetSingle<T>(string endpoint)
+        {
+            T item = default(T);
+            HttpResponseMessage response = client.GetAsync(endpoint).GetAwaiter().GetResult();
+            if (response.IsSuccessStatusCode)
+            {
+                item = response.Content.ReadAsAsync<T>().GetAwaiter().GetResult();
+            }
+            else
+            {
+                var error = response.Content.ReadAsAsync<RestExceptionInfo>().GetAwaiter().GetResult();
+                throw new ArgumentException(error.Msg);
+            }
+            return item;
+        }
+
+        public T Get<T>(int id, string endpoint)
+        {
+            T item = default(T);
+            HttpResponseMessage response = client.GetAsync(endpoint + "/" + id.ToString()).GetAwaiter().GetResult();
+            if (response.IsSuccessStatusCode)
+            {
+                item = response.Content.ReadAsAsync<T>().GetAwaiter().GetResult();
+            }
+            else
+            {
+                var error = response.Content.ReadAsAsync<RestExceptionInfo>().GetAwaiter().GetResult();
+                throw new ArgumentException(error.Msg);
+            }
+            return item;
+        }
+
+        public void Post<T>(T item, string endpoint)
+        {
+            HttpResponseMessage response =
+                client.PostAsJsonAsync(endpoint, item).GetAwaiter().GetResult();
+
+            if (!response.IsSuccessStatusCode)
+            {
+                var error = response.Content.ReadAsAsync<RestExceptionInfo>().GetAwaiter().GetResult();
+                throw new ArgumentException(error.Msg);
+            }
+            response.EnsureSuccessStatusCode();
+        }
+
+        public void Delete(int id, string endpoint)
+        {
+            HttpResponseMessage response =
+                client.DeleteAsync(endpoint + "/" + id.ToString()).GetAwaiter().GetResult();
+
+            if (!response.IsSuccessStatusCode)
+            {
+                var error = response.Content.ReadAsAsync<RestExceptionInfo>().GetAwaiter().GetResult();
+                throw new ArgumentException(error.Msg);
+            }
+
+            response.EnsureSuccessStatusCode();
+        }
+
+        public void Put<T>(T item, string endpoint)
+        {
+            HttpResponseMessage response =
+                client.PutAsJsonAsync(endpoint, item).GetAwaiter().GetResult();
+
+            if (!response.IsSuccessStatusCode)
+            {
+                var error = response.Content.ReadAsAsync<RestExceptionInfo>().GetAwaiter().GetResult();
+                throw new ArgumentException(error.Msg);
+            }
+
+            response.EnsureSuccessStatusCode();
+        }
+
+    }
+    public class RestExceptionInfo
+    {
+        public RestExceptionInfo()
+        {
+
+        }
+        public string Msg { get; set; }
+    }
+}