Add api key as a new authentication mode.

src/SenseNet.Client.Tests/Initializer.cs

@@ -18,7 +18,11 @@ public static void InitializeServer()
             {
                 new ServerContext
                 {
-                    Url = "https://localhost:44362"
+                    Url = "https://localhost:44362",
+                    Authentication =
+                    {
+                        ApiKey = ""
+                    }
                 }
             });
 

src/SenseNet.Client/Authentication/AuthenticationOptions.cs

@@ -4,5 +4,6 @@ public class AuthenticationOptions
     {
         public string ClientId { get; set; }
         public string ClientSecret { get; set; }
+        public string ApiKey { get; set; }
     }
 }

src/SenseNet.Client/RESTCaller.cs

@@ -690,8 +690,7 @@ private static async Task<string> ReadResponseStringAsync(WebResponse response)
 
         private static void SetAuthenticationForRequest(WebRequest myReq, ServerContext server)
         {
-            if (server == null)
-                server = ClientContext.Current.Server;
+            server ??= ClientContext.Current.Server;
 
             // use token authentication
             if (!string.IsNullOrEmpty(server.Authentication.AccessToken))
@@ -700,6 +699,13 @@ private static void SetAuthenticationForRequest(WebRequest myReq, ServerContext
                 return;
             }
 
+            // api key authentication
+            if (!string.IsNullOrEmpty(server.Authentication.ApiKey))
+            {
+                myReq.Headers.Add("apikey", server.Authentication.ApiKey);
+                return;
+            }
+
             if (string.IsNullOrEmpty(server.Username))
             {
                 // use NTLM authentication
@@ -799,8 +805,7 @@ public static async Task ProcessWebRequestResponseAsync(string url, HttpMethod m
 
         private static void SetAuthenticationForRequest(HttpClientHandler handler, HttpRequestMessage request, ServerContext server)
         {
-            if (server == null)
-                server = ClientContext.Current.Server;
+            server ??= ClientContext.Current.Server;
 
             // use token authentication
             if (!string.IsNullOrEmpty(server.Authentication.AccessToken))
@@ -809,6 +814,13 @@ private static void SetAuthenticationForRequest(HttpClientHandler handler, HttpR
                 return;
             }
 
+            // api key authentication
+            if (!string.IsNullOrEmpty(server.Authentication.ApiKey))
+            {
+                request.Headers.Add("apikey", server.Authentication.ApiKey);
+                return;
+            }
+
             if (string.IsNullOrEmpty(server.Username))
             {
                 // use NTLM authentication

src/SenseNet.Client/ServerContext.cs

@@ -18,6 +18,7 @@ public class AuthenticationInfo
         {
             public string AccessToken { get; set; }
             public string RefreshToken { get; set; }
+            public string ApiKey { get; set; }
         }
 
         /// <summary>
@@ -79,6 +80,16 @@ public Task<Content> GetCurrentUserAsync(string[] select = null, string[] expand
                     Logger?.LogTrace(ex, "Error during JWT access token conversion.");
                 }
             }
+            else if (!string.IsNullOrEmpty(Authentication?.ApiKey))
+            {
+                request = new ODataRequest(this)
+                {
+                    Path = "/Root",
+                    ActionName = "GetCurrentUser",
+                    Select = select,
+                    Expand = expand
+                };
+            }
 
             // no token or invalid: load Visitor
             request ??= new ODataRequest(this)
@@ -107,7 +118,8 @@ internal ServerContext Clone()
                 Authentication =
                 {
                     AccessToken = this.Authentication.AccessToken,
-                    RefreshToken = this.Authentication.RefreshToken
+                    RefreshToken = this.Authentication.RefreshToken,
+                    ApiKey = this.Authentication.ApiKey
                 }
             };
 

src/SenseNet.Client/ServerContextFactory.cs

@@ -108,6 +108,9 @@ private async Task<ServerContext> GetAuthenticatedServerAsync(string name)
                 Url = options.Url.AppendSchema(),
             };
 
+            if (!string.IsNullOrEmpty(options.Authentication.ApiKey))
+                server.Authentication.ApiKey = options.Authentication.ApiKey;
+
             // do not try to authenticate if the values are not provided
             if (string.IsNullOrEmpty(options.Authentication.ClientId) ||
                 string.IsNullOrEmpty(options.Authentication.ClientSecret))