Create example.cs

csharp/example.cs

@@ -0,0 +1,97 @@
+using Jose; // https://github.com/dvsekhvalnov/jose-jwt
+using System;
+using System.Collections.Generic;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Security.Cryptography;
+using System.Xml.Linq;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+
+namespace HMServiceAccountAPISample;
+class MainClass
+{
+    /*
+     * Sandbox service account private key json example
+     * 
+     * {    "inserted_at":"2023-07-17T10:19:10",
+     *      "private_key":"-----BEGIN PRIVATE KEY-----\nMIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgbtaDZT7wj9kWE3tn\nkimCOiO4bKmxu74r79DNwn55UHWhRANCAATvFUpSLM6OIGfGXY001+DtKYwdTgWB\nNQF51+kiLN9OF5rRtdExRdivdNEWkcy65H5aV5dm0pB2Dl3/odUcQKgC\n-----END PRIVATE KEY-----",
+     *      "instance_uri":"https://sandbox.api.high-mobility.com",
+     *      "token_uri":"https://sandbox.api.high-mobility.com/v1/auth_tokens",
+     *      "id":"6c912e9b-ac53-4068-81ac-6bf971aba0c5"
+     * }
+     */
+
+    //For production use production service account private key json values
+
+    //Remove header, footer and newlines from your private key in the snippet        
+    static string private_key = "MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgbtaDZT7wj9kWE3tnkimCOiO4bKmxu74r79DNwn55UHWhRANCAATvFUpSLM6OIGfGXY001+DtKYwdTgWBNQF51+kiLN9OF5rRtdExRdivdNEWkcy65H5aV5dm0pB2Dl3/odUcQKgC";
+    //iss is id in service account private key json
+    static string iss = "6c912e9b-ac53-4068-81ac-6bf971aba0c5";
+    //For production use https://api.high-mobility.com/v1
+    static string aud = "https://sandbox.api.high-mobility.com/v1";
+
+    static string createJwtToken()
+    {
+        var payload = new Dictionary<string, object>()
+                {
+                    { "iss", iss },
+                    { "aud", aud},
+                    { "iat", DateTimeOffset.Now.ToUnixTimeSeconds()},
+                    { "jti", Guid.NewGuid()},
+                    { "ver", 2}
+                };
+
+        ECDsa key = ECDsa.Create();
+        key.ImportPkcs8PrivateKey(Convert.FromBase64String(private_key), out _);
+
+        string token = Jose.JWT.Encode(payload, key, JwsAlgorithm.ES256);
+        return token;
+    }
+
+    static string getServiceAccountTokenUsingJwt()
+    {
+        HttpClient client = new HttpClient();
+
+        //Add request body
+        var formContent = new FormUrlEncodedContent(new[]
+        {
+            new KeyValuePair<string, string>("assertion", createJwtToken()),
+        });
+
+        Console.WriteLine(client.DefaultRequestHeaders.ToString());
+        HttpResponseMessage response = client.PostAsync(aud + "/auth_tokens", formContent).Result;
+        string body = response.Content.ReadAsStringAsync().Result;
+
+        Console.WriteLine(response.ToString());
+        Console.WriteLine(body);
+
+        //Parse token from response
+        JObject jsonObject = JObject.Parse(body);
+        return jsonObject.Value<string>("auth_token");
+    }
+
+    static void getFleetVehicles(string token)
+    {
+        HttpClient client = new HttpClient();
+
+        //Add token as header authenticate Bearer value
+        client.BaseAddress = new Uri(aud);
+        client.DefaultRequestHeaders.Accept.Clear();
+        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token);
+
+        Console.WriteLine(client.DefaultRequestHeaders.ToString());
+
+        HttpResponseMessage response = client.GetAsync(aud + "/fleets/vehicles").Result;
+        string body = response.Content.ReadAsStringAsync().Result;
+
+        Console.WriteLine(response.ToString());
+        Console.WriteLine(body);
+    }
+
+    static void Main(string[] args)
+    {
+        string token = getServiceAccountTokenUsingJwt();
+        getFleetVehicles(token);
+    }
+}