.NET api call example

dotnet-cognito-auth/donet-api-gateway-auth/ApiHelper.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Net;
+using System.Text;
+using Newtonsoft.Json;
+
+namespace donet_api_gateway_auth
+{
+    public static class ApiHelper
+    {
+        private static string GenerateOauthToken()
+        {
+            //TODO: pull this from env vars
+            string consumerKey = "5mulvgjjlbbm4cb8p7s1d6li8i";
+            string consumerSecret = "1pv83kd7vu9dps5alriaj25c5hfdiqvl3d9ld41dupjlne5goj1q";
+            string accessToken;
+
+            byte[] byte1 = Encoding.ASCII.GetBytes("grant_type=client_credentials");
+
+            HttpWebRequest bearerReq = WebRequest.Create("https://et-covid20.auth.us-east-2.amazoncognito.com/oauth2/token") as HttpWebRequest;
+            bearerReq.Accept = "application/json";
+            bearerReq.Method = "POST";
+            bearerReq.ContentType = "application/x-www-form-urlencoded";
+            bearerReq.ContentLength = byte1.Length;
+            bearerReq.KeepAlive = false;
+            bearerReq.Headers.Add("Authorization", "Basic " + Convert.ToBase64String(Encoding.Default.GetBytes(consumerKey + ":" + consumerSecret)));
+            Stream newStream = bearerReq.GetRequestStream();
+            newStream.Write(byte1, 0, byte1.Length);
+
+            WebResponse bearerResp = bearerReq.GetResponse();
+
+            using (var reader = new StreamReader(bearerResp.GetResponseStream(), Encoding.UTF8))
+            {
+                var response = reader.ReadToEnd();
+                Bearer bearer = JsonConvert.DeserializeObject<Bearer>(response);
+                accessToken = bearer.access_token;
+            }
+
+            return accessToken;
+        }
+
+        public static HttpWebRequest GetWebRequest(string uri)
+        {
+            string accessToken = ApiHelper.GenerateOauthToken();
+            HttpWebRequest apiRequest = WebRequest.Create(uri) as HttpWebRequest;
+            apiRequest.ContentType = "application/json";
+            apiRequest.KeepAlive = false;
+            apiRequest.Headers.Add("Authorization", "Bearer " + accessToken);
+            return apiRequest;
+        }
+    }
+}

dotnet-cognito-auth/donet-api-gateway-auth/Bearer.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace donet_api_gateway_auth
+{
+    public class Bearer
+    {
+        public string scope { get; set; }
+        public string token_type { get; set; }
+        public string expires_in { get; set; }
+        public string refresh_token { get; set; }
+        public string access_token { get; set; }
+    }
+}

dotnet-cognito-auth/donet-api-gateway-auth/Program.cs

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+using System;
+using System.IO;
+using System.Net;
+using System.Text;
+using Newtonsoft.Json;
+
+namespace donet_api_gateway_auth
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            HttpWebRequest apiRequest = ApiHelper.GetWebRequest("https://api.ethiopia-covid19.com/gateway/communities");
+            apiRequest.Method = "GET";
+            WebResponse apiResponse = apiRequest.GetResponse();
+            using (var reader = new StreamReader(apiResponse.GetResponseStream(), Encoding.UTF8))
+            {
+                var response = reader.ReadToEnd();
+                Console.WriteLine($"Api Response: {response}");
+            }
+        }
+
+    }
+
+
+
+}

dotnet-cognito-auth/donet-api-gateway-auth/README.md

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+Example 
+
+```
+HttpWebRequest apiRequest = AuthHelper.GetWebRequest("https://api.ethiopia-covid19.com/gateway/communities");
+apiRequest.Method = "GET";
+WebResponse apiResponse = apiRequest.GetResponse();
+```

dotnet-cognito-auth/donet-api-gateway-auth/donet-api-gateway-auth.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <RootNamespace>donet_api_gateway_auth</RootNamespace>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
+  </ItemGroup>
+
+</Project>