Use Refit for APIs, make data/API stack async

Start/Client/Components/CreateContainer.razor

@@ -1,6 +1,8 @@
 @using Start.Shared
-@using System.IO
+@using Start.Shared.Api
-@inject HttpClient Http
+@using Refit
+
+@inject IBookmarkContainersApi bookmarkContainersApi
 
 <Dialog Title="Create Container" Active="this.IsOpen" OnClose="this.OnDialogClose">
     <EditForm Model="this.model" OnValidSubmit="this.OnSubmit">
@@ -50,16 +52,10 @@
 
     protected async void OnSubmit()
     {
-        HttpResponseMessage response = await Http
+        ApiResponse<BookmarkContainerDto?> apiResponse = await bookmarkContainersApi
-            .PostAsJsonAsync("BookmarkContainers/Create", model.Title);
+            .CreateBookmarkContainer(model.Title);
 
-        Stream stream = response.RequestMessage!.Content!.ReadAsStream();
+        BookmarkContainerDto? container = apiResponse.Content;
-        StreamReader reader = new StreamReader(stream);
-        Console.WriteLine(reader.ReadToEnd());
-
-        BookmarkContainerDto? container = await response
-            !.Content
-            !.ReadFromJsonAsync<BookmarkContainerDto>();
 
         if (container == null)
         {

Start/Client/Components/DeleteContainer.razor

@@ -1,5 +1,8 @@
 @using Microsoft.AspNetCore.Components.WebAssembly.Authentication
+@using Start.Shared.Api
+
 @inject HttpClient Http
+@inject IBookmarkContainersApi bookmarkContainersApi
 
 @{ string title = $"Delete Container \"{this.ContainerTitle}\""; }
 
@@ -41,8 +44,8 @@
     {
         try
         {
-            HttpResponseMessage result = await Http
+            HttpResponseMessage result = await bookmarkContainersApi
-                .DeleteAsync($"BookmarkContainers/Delete/{this.BookmarkContainerId}");
+                .DeleteBookmarkContainer(this.BookmarkContainerId);
 
             if (result.StatusCode == System.Net.HttpStatusCode.OK)
             {

Start/Client/Pages/StartPage.razor

@@ -1,11 +1,16 @@
 @page "/Start"
-@using Microsoft.AspNetCore.Authorization
+@using System.Collections.Generic
+@using System.Linq
 @using Microsoft.AspNetCore.Components.WebAssembly.Authentication
 @using Start.Client.Components
 @using Start.Shared
-@attribute [Authorize]
+@using Start.Shared.Api
-@inject HttpClient Http
+@using Refit
+
+@* Distiguish from Refit.Authorize *@
+@attribute [Microsoft.AspNetCore.Authorization.Authorize]
 @inject Blazored.LocalStorage.ILocalStorageService localStorage
+@inject IBookmarkContainersApi bookmarkContainersApi
 
 @if (bookmarkContainers == null)
 {
@@ -101,9 +106,10 @@ else
     {
         try
         {
-            this.bookmarkContainers = await Http
+            ApiResponse<IEnumerable<BookmarkContainerDto>> response = await bookmarkContainersApi
-                .GetFromJsonAsync<IList<BookmarkContainerDto>>(
+                .GetAllBookmarkContainers();
-                    "BookmarkContainers");
+
+            this.bookmarkContainers = response.Content?.ToList();
 
             if (this.bookmarkContainers == null || !this.bookmarkContainers.Any())
             {
@@ -120,13 +126,10 @@ else
 
     protected async Task CreateDefaultContainer()
     {
-        HttpResponseMessage response = await Http
+        ApiResponse<BookmarkContainerDto?> response = await bookmarkContainersApi
-            .PostAsJsonAsync("BookmarkContainers/Create", "Default");
+            .CreateBookmarkContainer("Default");
 
-        BookmarkContainerDto? container = await response
+        BookmarkContainerDto? container = response.Content;
-            .RequestMessage
-            !.Content
-            !.ReadFromJsonAsync<BookmarkContainerDto?>();
 
         if (container != null)
             await this.OnContainerSelected(container.BookmarkContainerId);
@@ -139,12 +142,13 @@ else
             if (!this.bookmarkContainers?.Any(bc => bc.BookmarkContainerId == bookmarkContainerId) ?? false)
                 bookmarkContainerId = this.bookmarkContainers?.First().BookmarkContainerId ?? bookmarkContainerId;
 
-            BookmarkContainerDto? bookmarkContainer = await Http
+            ApiResponse<BookmarkContainerDto?> response = await bookmarkContainersApi
-                .GetFromJsonAsync<BookmarkContainerDto?>(
+                .GetBookmarkContainer(bookmarkContainerId);
-                    $"BookmarkContainers/{bookmarkContainerId}");
+
+            BookmarkContainerDto? container = response.Content;
 
             await this.SetSelectedContainer(bookmarkContainerId);
-            this.selectedBookmarkContainer = bookmarkContainer;
+            this.selectedBookmarkContainer = container;
         }
         catch (AccessTokenNotAvailableException e)
         {

Start/Client/Program.cs

@@ -5,6 +5,8 @@ using Microsoft.AspNetCore.Components.WebAssembly.Authentication;
 using Microsoft.AspNetCore.Components.WebAssembly.Hosting;
 using Microsoft.Extensions.DependencyInjection;
 using Blazored.LocalStorage;
+using Refit;
+using Start.Shared.Api;
 
 namespace Start.Client {
 	public class Program {
@@ -16,12 +18,26 @@ namespace Start.Client {
 					client => client.BaseAddress = new Uri(builder.HostEnvironment.BaseAddress))
 				.AddHttpMessageHandler<BaseAddressAuthorizationMessageHandler>();
 
-			// Supply HttpClient instances that include access tokens when making requests to the server project
+			// Supply HttpClient instances that include access tokens when making requests to the
+			// server project
 			builder.Services.AddScoped(sp => sp.GetRequiredService<IHttpClientFactory>()
-				.CreateClient("Start.ServerAPI"));
+					.CreateClient("Start.ServerAPI"));
+
+			// Blazor will throw an error if a relative URI is used, so we have to get the base
+			// address for building the API paths
+			Uri baseUri = new(builder.HostEnvironment.BaseAddress);
+
+			builder.Services.AddRefitClient<IBookmarkContainersApi>()
+				.ConfigureHttpClient(c => {
+					c.BaseAddress = new Uri(baseUri, "BookmarkContainers");
+				})
+				.AddHttpMessageHandler<BaseAddressAuthorizationMessageHandler>();
+
+			builder.Services.AddRefitClient<IBookmarksApi>()
+				.ConfigureHttpClient(c => { c.BaseAddress = new Uri(baseUri, "Bookmarks"); })
+				.AddHttpMessageHandler<BaseAddressAuthorizationMessageHandler>();
 
 			builder.Services.AddApiAuthorization();
-
 			builder.Services.AddBlazoredLocalStorage();
 
 			await builder.Build().RunAsync();

Start/Client/Start.Client.csproj

@@ -17,6 +17,8 @@
     <PackageReference Include="Microsoft.Extensions.Http" Version="5.0.0" />
     <PackageReference Include="System.Net.Http.Json" Version="5.0.0" />
     <PackageReference Include="Blazored.LocalStorage" Version="4.1.5" />
+    <PackageReference Include="Refit" Version="6.1.15" />
+    <PackageReference Include="Refit.HttpClientFactory" Version="6.1.15" />
   </ItemGroup>
 
   <ItemGroup>
@@ -29,6 +31,8 @@
 
   <ItemGroup>
     <None Remove="Blazored.LocalStorage" />
+    <None Remove="Refit" />
+    <None Remove="Refit.HttpClientFactory" />
   </ItemGroup>
   <ItemGroup>
     <Content Remove="wwwroot\css\Spectre\" />

Start/Server/Controllers/BookmarkContainersController.cs

@@ -1,5 +1,6 @@
 using System.Collections.Generic;
 using System.Linq;
+using System.Threading.Tasks;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
@@ -22,9 +23,9 @@ namespace Start.Server.Controllers {
 		[ProducesResponseType(StatusCodes.Status200OK,
 			Type = typeof(IEnumerable<BookmarkContainerDto>))]
 		[ProducesResponseType(StatusCodes.Status404NotFound)]
-		public IActionResult GetAllBookmarkContainers() {
+		public async Task<IActionResult> GetAllBookmarkContainers() {
-			List<BookmarkContainerDto>? containers = this.bookmarkContainerService
+			List<BookmarkContainerDto>? containers = (await this.bookmarkContainerService
-				.GetUserBookmarkContainers(this.GetAuthorizedUserId())
+				.GetUserBookmarkContainers(this.GetAuthorizedUserId()))
 				.Select(bc => bc.MapToDto())
 				.ToList();
 
@@ -38,9 +39,9 @@ namespace Start.Server.Controllers {
 		[Route("{bookmarkContainerId}")]
 		[ProducesResponseType(StatusCodes.Status200OK, Type = typeof(BookmarkContainerDto))]
 		[ProducesResponseType(StatusCodes.Status404NotFound)]
-		public IActionResult GetBookmarkContainer(int bookmarkContainerId) {
+		public async Task<IActionResult> GetBookmarkContainer(int bookmarkContainerId) {
-			BookmarkContainerDto? container = this.bookmarkContainerService
+			BookmarkContainerDto? container = (await this.bookmarkContainerService
-				.GetBookmarkContainer(this.GetAuthorizedUserId(), bookmarkContainerId, true, true)
+				.GetBookmarkContainer(this.GetAuthorizedUserId(), bookmarkContainerId, true, true))
 				?.MapToDto();
 
 			if (container == null)
@@ -53,9 +54,9 @@ namespace Start.Server.Controllers {
 		[Route("Create")]
 		[ProducesResponseType(StatusCodes.Status201Created, Type = typeof(BookmarkContainerDto))]
 		[ProducesResponseType(StatusCodes.Status400BadRequest)]
-		public IActionResult CreateBookmarkContainer([FromBody] string title) {
+		public async Task<IActionResult> CreateBookmarkContainer([FromBody] string title) {
-			BookmarkContainerDto? container = this.bookmarkContainerService
+			BookmarkContainerDto? container = (await this.bookmarkContainerService
-				.CreateBookmarkContainer(this.GetAuthorizedUserId(), title)
+				.CreateBookmarkContainer(this.GetAuthorizedUserId(), title))
 				?.MapToDto();
 
 			if (container == null)
@@ -71,8 +72,8 @@ namespace Start.Server.Controllers {
 		[Route("Delete/{bookmarkContainerId}")]
 		[ProducesResponseType(StatusCodes.Status200OK)]
 		[ProducesResponseType(StatusCodes.Status404NotFound)]
-		public IActionResult DeleteBookmarkContainer(int bookmarkContainerId) {
+		public async Task<IActionResult> DeleteBookmarkContainer(int bookmarkContainerId) {
-			bool res = this.bookmarkContainerService
+			bool res = await this.bookmarkContainerService
 				.DeleteBookmarkContainer(this.GetAuthorizedUserId(), bookmarkContainerId);
 
 			if (!res)

Start/Server/Controllers/BookmarksController.cs

@@ -1,5 +1,4 @@
-using System.Collections.Generic;
+using System.Threading.Tasks;
-using System.Linq;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
@@ -25,9 +24,9 @@ namespace Start.Server.Controllers {
 		[Route("{bookmarkId}")]
 		[ProducesResponseType(StatusCodes.Status200OK, Type = typeof(BookmarkDto))]
 		[ProducesResponseType(StatusCodes.Status404NotFound)]
-		public IActionResult GetBookmark(int bookmarkId) {
+		public async Task<IActionResult> GetBookmark(int bookmarkId) {
-			BookmarkDto? bookmark = this.bookmarkService
+			BookmarkDto? bookmark = (await this.bookmarkService
-				.GetBookmark(this.GetAuthorizedUserId(), bookmarkId)
+				.GetBookmark(this.GetAuthorizedUserId(), bookmarkId))
 				?.MapToDto();
 
 			if (bookmark == null)
@@ -40,10 +39,10 @@ namespace Start.Server.Controllers {
 		[Route("Create")]
 		[ProducesResponseType(StatusCodes.Status201Created, Type = typeof(BookmarkDto))]
 		[ProducesResponseType(StatusCodes.Status400BadRequest)]
-		public IActionResult CreateBookmark(string title, string url, string? notes,
+		public async Task<IActionResult> CreateBookmark(string title, string url, string? notes,
 			int bookmarkGroupId) {
-			BookmarkDto? bookmark =  this.bookmarkService
+			BookmarkDto? bookmark = (await this.bookmarkService
-				.CreateBookmark(this.GetAuthorizedUserId(), title, url, notes, bookmarkGroupId)
+				.CreateBookmark(this.GetAuthorizedUserId(), title, url, notes, bookmarkGroupId))
 				?.MapToDto();
 
 			if (bookmark == null)
@@ -58,8 +57,9 @@ namespace Start.Server.Controllers {
 		[Route("Delete/{bookmarkId}")]
 		[ProducesResponseType(StatusCodes.Status200OK)]
 		[ProducesResponseType(StatusCodes.Status404NotFound)]
-		public IActionResult DeleteBookmark(int bookmarkId) {
+		public async Task<IActionResult> DeleteBookmark(int bookmarkId) {
-			var res = this.bookmarkService.DeleteBookmark(this.GetAuthorizedUserId(), bookmarkId);
+			var res = await this.bookmarkService
+				.DeleteBookmark(this.GetAuthorizedUserId(), bookmarkId);
 
 			if (!res)
 				return NotFound();

Start/Server/Data/Services/BookmarkContainerService.cs

@@ -1,5 +1,6 @@
 using System.Collections.Generic;
 using System.Linq;
+using System.Threading.Tasks;
 using Microsoft.EntityFrameworkCore;
 using Start.Server.Data.Services.Interfaces;
 using Start.Server.Extensions;
@@ -13,15 +14,15 @@ namespace Start.Server.Data.Services {
 			this.db = dbContext;
 		}
 
-		public BookmarkContainer? GetBookmarkContainer(string userId,
+		public async Task<BookmarkContainer?> GetBookmarkContainer(string userId,
 			int bookmarkContainerId, bool includeGroups = false, bool includeBookmarks = false) {
-			BookmarkContainer? bookmarkContainer = this.db.BookmarkContainers
+			BookmarkContainer? bookmarkContainer = await this.db.BookmarkContainers
 				.Where(bc => bc.BookmarkContainerId == bookmarkContainerId)
 				.If(includeGroups, q => q.Include(bc => bc.BookmarkGroups))
 				.If(includeBookmarks, q => q
 					.Include(bc => bc.BookmarkGroups)
 					.ThenInclude(bg => bg.Bookmarks))
-				.SingleOrDefault();
+				.SingleOrDefaultAsync();
 
 			if (bookmarkContainer == null)
 				return null;
@@ -33,31 +34,31 @@ namespace Start.Server.Data.Services {
 			return bookmarkContainer;
 		}
 
-		public IList<BookmarkContainer> GetUserBookmarkContainers(string userId,
+		public async Task<IList<BookmarkContainer>> GetUserBookmarkContainers(string userId,
 			bool includeGroups = false, bool includeBookmarks = false) {
-			return this.db.BookmarkContainers
+			return await this.db.BookmarkContainers
 				.Where(bc => bc.ApplicationUserId == userId)
 				.If(includeGroups, q => q.Include(bc => bc.BookmarkGroups))
 				.If(includeBookmarks, q => q
 					.Include(bc => bc.BookmarkGroups)
 					.ThenInclude(bg => bg.Bookmarks))
-				.ToList();
+				.ToListAsync();
 		}
 
-		public BookmarkContainer? CreateBookmarkContainer(string userId,
+		public async Task<BookmarkContainer?> CreateBookmarkContainer(string userId,
 			string title) {
 			// No need to worry about ownership here
 
 			BookmarkContainer newContainer = new(userId, title);
-			this.db.BookmarkContainers.Add(newContainer);
+			await this.db.BookmarkContainers.AddAsync(newContainer);
-			this.db.SaveChanges();
+			await this.db.SaveChangesAsync();
 			return newContainer;
 		}
 
-		public BookmarkContainer? UpdateBookmarkContainer(string userId,
+		public async Task<BookmarkContainer?> UpdateBookmarkContainer(string userId,
 			BookmarkContainer bookmarkContainer) {
-			BookmarkContainer? exitingBookmarkContainer = this.db.BookmarkContainers
+			BookmarkContainer? exitingBookmarkContainer = await this.db.BookmarkContainers
-				.SingleOrDefault(bc => bc.BookmarkContainerId
+				.SingleOrDefaultAsync(bc => bc.BookmarkContainerId
 					== bookmarkContainer.BookmarkContainerId);
 
 			if (exitingBookmarkContainer == null
@@ -66,15 +67,15 @@ namespace Start.Server.Data.Services {
 				return null;
 
 			this.db.Entry(bookmarkContainer).State = EntityState.Modified;
-			this.db.SaveChanges();
+			await this.db.SaveChangesAsync();
 
 			return bookmarkContainer;
 		}
 
-		public bool DeleteBookmarkContainer(string userId, int bookmarkContainerId) {
+		public async Task<bool> DeleteBookmarkContainer(string userId, int bookmarkContainerId) {
-			BookmarkContainer? bookmarkContainer = this.db.BookmarkContainers
+			BookmarkContainer? bookmarkContainer = await this.db.BookmarkContainers
 				.Where(bc => bc.BookmarkContainerId == bookmarkContainerId)
-				.SingleOrDefault();
+				.SingleOrDefaultAsync();
 
 			if (bookmarkContainer == null)
 				return false;
@@ -83,7 +84,7 @@ namespace Start.Server.Data.Services {
 				return false;
 
 			this.db.BookmarkContainers.Remove(bookmarkContainer);
-			this.db.SaveChanges();
+			await this.db.SaveChangesAsync();
 
 			return true;
 		}

Start/Server/Data/Services/BookmarkGroupService.cs

@@ -1,11 +1,10 @@
-using System;
+using System.Collections.Generic;
-using System.Collections.Generic;
 using System.Linq;
+using System.Threading.Tasks;
 using Microsoft.EntityFrameworkCore;
 using Start.Server.Data.Services.Interfaces;
 using Start.Server.Extensions;
 using Start.Server.Models;
-using Start.Shared;
 
 namespace Start.Server.Data.Services {
 	public class BookmarkGroupService : IBookmarkGroupService {
@@ -15,12 +14,12 @@ namespace Start.Server.Data.Services {
 			this.db = dbContext;
 		}
 
-		public BookmarkGroup? GetBookmarkGroup(string userId, int bookmarkGroupId,
+		public async Task<BookmarkGroup?> GetBookmarkGroup(string userId, int bookmarkGroupId,
 			bool includeBookmarks = false) {
-			BookmarkGroup? group = db.BookmarkGroups
+			BookmarkGroup? group = await db.BookmarkGroups
 				.Where(bg => bg.BookmarkGroupId == bookmarkGroupId)
 				.If(includeBookmarks, q => q.Include(bg => bg.Bookmarks))
-				.SingleOrDefault();
+				.SingleOrDefaultAsync();
 
 			if (!BookmarkOwnershipTools.IsBookmarkGroupOwner(db, userId, bookmarkGroupId))
 				return null;
@@ -28,31 +27,31 @@ namespace Start.Server.Data.Services {
 			return group;
 		}
 
-		public IList<BookmarkGroup> GetUserBookmarkGroups(string userId,
+		public async Task<IList<BookmarkGroup>> GetUserBookmarkGroups(string userId,
 			bool includeBookmarkGroups = false) {
-			return this.db.BookmarkGroups
+			return await this.db.BookmarkGroups
 				.Where(bg => bg.BookmarkContainer!.ApplicationUserId == userId)
 				.If(includeBookmarkGroups, q => q.Include(bg => bg.Bookmarks))
-				.ToList();
+				.ToListAsync();
 		}
 
-		public BookmarkGroup? CreateBookmarkGroup(string userId, string title,
+		public async Task<BookmarkGroup?> CreateBookmarkGroup(string userId, string title,
 			string color, int bookmarkContainerId) {
 			if (!BookmarkOwnershipTools
 				.IsBookmarkContainerOwner(this.db, userId, bookmarkContainerId))
 				return null;
 
 			BookmarkGroup newBookmarkGroup = new(title, color, bookmarkContainerId);
-			this.db.BookmarkGroups.Add(newBookmarkGroup);
+			await this.db.BookmarkGroups.AddAsync(newBookmarkGroup);
-			this.db.SaveChanges();
+			await this.db.SaveChangesAsync();
 
 			return newBookmarkGroup;
 		}
 
-		public BookmarkGroup? UpdateBookmarkGroup(string userId,
+		public async Task<BookmarkGroup?> UpdateBookmarkGroup(string userId,
 			BookmarkGroup bookmarkGroup) {
-			BookmarkGroup? existingGroup = this.db.BookmarkGroups
+			BookmarkGroup? existingGroup = await this.db.BookmarkGroups
-				.SingleOrDefault(bg => bg.BookmarkGroupId == bookmarkGroup.BookmarkGroupId);
+				.SingleOrDefaultAsync(bg => bg.BookmarkGroupId == bookmarkGroup.BookmarkGroupId);
 
 			if (existingGroup == null)
 				return null;
@@ -66,14 +65,14 @@ namespace Start.Server.Data.Services {
 				return null;
 
 			this.db.Entry(bookmarkGroup).State = EntityState.Modified;
-			this.db.SaveChanges();
+			await this.db.SaveChangesAsync();
 
 			return bookmarkGroup;
 		}
 
-		public bool DeleteBookmarkGroup(string userId, int bookmarkGroupId) {
+		public async Task<bool> DeleteBookmarkGroup(string userId, int bookmarkGroupId) {
-			BookmarkGroup? bookmarkGroup = this.db.BookmarkGroups
+			BookmarkGroup? bookmarkGroup = await this.db.BookmarkGroups
-				.SingleOrDefault(bg => bg.BookmarkGroupId == bookmarkGroupId);
+				.SingleOrDefaultAsync(bg => bg.BookmarkGroupId == bookmarkGroupId);
 
 			if (bookmarkGroup == null)
 				return false;
@@ -82,7 +81,7 @@ namespace Start.Server.Data.Services {
 				return false;
 
 			this.db.BookmarkGroups.Remove(bookmarkGroup);
-			this.db.SaveChanges();
+			await this.db.SaveChangesAsync();
 
 			return true;
 		}

Start/Server/Data/Services/BookmarkService.cs

@@ -1,5 +1,6 @@
 using System.Collections.Generic;
 using System.Linq;
+using System.Threading.Tasks;
 using Microsoft.EntityFrameworkCore;
 using Start.Server.Data.Services.Interfaces;
 using Start.Server.Models;
@@ -12,29 +13,29 @@ namespace Start.Server.Data.Services {
 			this.db = dbContext;
 		}
 
-		public Bookmark? GetBookmark(string userId, int bookmarkId) {
+		public async Task<Bookmark?> GetBookmark(string userId, int bookmarkId) {
 			if (!BookmarkOwnershipTools.IsBookmarkOwner(this.db, userId, bookmarkId))
 				return null;
 
-			return this.db.Bookmarks
+			return await this.db.Bookmarks
-				.SingleOrDefault(b => b.BookmarkId == bookmarkId);
+				.SingleOrDefaultAsync(b => b.BookmarkId == bookmarkId);
 		}
 
-		public IList<Bookmark> GetUserBookmarks(string userId) {
+		public async Task<IList<Bookmark>> GetUserBookmarks(string userId) {
-			return this.db.Bookmarks
+			return await this.db.Bookmarks
 				.Where(b => b.BookmarkGroup!.BookmarkContainer!.ApplicationUserId == userId)
-				.ToList();
+				.ToListAsync();
 		}
 
-		public Bookmark? CreateBookmark(string userId, string title, string url, string? notes,
+		public async Task<Bookmark?> CreateBookmark(string userId, string title, string url, string? notes,
 			int bookmarkGroupId) {
 			if (!BookmarkOwnershipTools.IsBookmarkGroupOwner(this.db, userId, bookmarkGroupId))
 				return null;
 
 			Bookmark newBookmark = new(title, url, bookmarkGroupId);
 
-			db.Bookmarks.Add(newBookmark);
+			await db.Bookmarks.AddAsync(newBookmark);
-			db.SaveChanges();
+			await db.SaveChangesAsync();
 
 			if (newBookmark.BookmarkId <= 0)
 				return null;
@@ -42,7 +43,7 @@ namespace Start.Server.Data.Services {
 			return newBookmark;
 		}
 
-		public Bookmark? UpdateBookmark(string userId, Bookmark bookmark) {
+		public async Task<Bookmark?> UpdateBookmark(string userId, Bookmark bookmark) {
 			Bookmark? existingBookmark = db.Bookmarks
 				.SingleOrDefault(b => b.BookmarkId == bookmark.BookmarkId);
 
@@ -55,12 +56,12 @@ namespace Start.Server.Data.Services {
 				return null;
 
 			db.Entry(bookmark).State = EntityState.Modified;
-			db.SaveChanges();
+			await db.SaveChangesAsync();
 
 			return bookmark;
 		}
 
-		public bool DeleteBookmark(string userId, int bookmarkId) {
+		public async Task<bool> DeleteBookmark(string userId, int bookmarkId) {
 			Bookmark? bookmark = db.Bookmarks
 				.SingleOrDefault(b => b.BookmarkId == bookmarkId);
 
@@ -71,7 +72,7 @@ namespace Start.Server.Data.Services {
 				return false;
 
 			db.Bookmarks.Remove(bookmark);
-			db.SaveChanges();
+			await db.SaveChangesAsync();
 
 			return true;
 		}

Start/Server/Data/Services/Interfaces/IBookmarkContainerService.cs

@@ -1,19 +1,18 @@
-using System;
+using System.Collections.Generic;
-using System.Collections.Generic;
+using System.Threading.Tasks;
 using Start.Server.Models;
-using Start.Shared;
 
 namespace Start.Server.Data.Services.Interfaces {
 	public interface IBookmarkContainerService {
-		public BookmarkContainer? GetBookmarkContainer(string userId,
+		public Task<BookmarkContainer?> GetBookmarkContainer(string userId,
 			int bookmarkContainerId, bool includeGroups = false, bool includeBookmarks = false);
-		public IList<BookmarkContainer> GetUserBookmarkContainers(string userId,
+		public Task<IList<BookmarkContainer>> GetUserBookmarkContainers(string userId,
 			bool includeGroups = false, bool includeBookmarks = false);
 
-		public BookmarkContainer? CreateBookmarkContainer(string userId,
+		public Task<BookmarkContainer?> CreateBookmarkContainer(string userId,
 			string title);
-		public BookmarkContainer? UpdateBookmarkContainer(string userId,
+		public Task<BookmarkContainer?> UpdateBookmarkContainer(string userId,
 			BookmarkContainer bookmarkContainer);
-		public bool DeleteBookmarkContainer(string userId, int bookmarkContainerId);
+		public Task<bool> DeleteBookmarkContainer(string userId, int bookmarkContainerId);
 	}
 }

Start/Server/Data/Services/Interfaces/IBookmarkGroupService.cs

@@ -1,19 +1,20 @@
 using System;
 using System.Collections.Generic;
+using System.Threading.Tasks;
 using Start.Server.Models;
 using Start.Shared;
 
 namespace Start.Server.Data.Services.Interfaces {
 	public interface IBookmarkGroupService {
-		public BookmarkGroup? GetBookmarkGroup(string userId,
+		public Task<BookmarkGroup?> GetBookmarkGroup(string userId,
 			int bookmarkGroupId, bool includeBookmarks = false);
-		public IList<BookmarkGroup> GetUserBookmarkGroups(string userId,
+		public Task<IList<BookmarkGroup>> GetUserBookmarkGroups(string userId,
 			bool includeBookmarks = false);
 
-		public BookmarkGroup? CreateBookmarkGroup(string userId, string title,
+		public Task<BookmarkGroup?> CreateBookmarkGroup(string userId, string title,
 			string color, int bookmarkContainerId);
-		public BookmarkGroup? UpdateBookmarkGroup(string userId,
+		public Task<BookmarkGroup?> UpdateBookmarkGroup(string userId,
 			BookmarkGroup bookmarkGroup);
-		public bool DeleteBookmarkGroup(string userId, int bookmarkGroupId);
+		public Task<bool> DeleteBookmarkGroup(string userId, int bookmarkGroupId);
 	}
 }

Start/Server/Data/Services/Interfaces/IBookmarkService.cs

@@ -1,16 +1,15 @@
-using System;
+using System.Collections.Generic;
-using System.Collections.Generic;
+using System.Threading.Tasks;
 using Start.Server.Models;
-using Start.Shared;
 
 namespace Start.Server.Data.Services.Interfaces {
 	public interface IBookmarkService {
-		public Bookmark? GetBookmark(string userId, int bookmarkId);
+		public Task<Bookmark?> GetBookmark(string userId, int bookmarkId);
-		public IList<Bookmark> GetUserBookmarks(string userId);
+		public Task<IList<Bookmark>> GetUserBookmarks(string userId);
 
-		public Bookmark? CreateBookmark(string userId, string title, string url,
+		public Task<Bookmark?> CreateBookmark(string userId, string title, string url,
 			string? notes, int bookmarkGroupId);
-		public Bookmark? UpdateBookmark(string userId, Bookmark bookmark);
+		public Task<Bookmark?> UpdateBookmark(string userId, Bookmark bookmark);
-		public bool DeleteBookmark(string userId, int bookmarkId);
+		public Task<bool> DeleteBookmark(string userId, int bookmarkId);
 	}
 }

Start/Server/Startup.cs

@@ -9,6 +9,8 @@ using Start.Server.Data;
 using Start.Server.Models;
 using Start.Server.Data.Services;
 using Start.Server.Data.Services.Interfaces;
+using Refit;
+using Start.Shared.Api;
 
 namespace Start.Server {
 	public class Startup {

Start/Shared/Api/IBookmarkContainersApi.cs

@@ -0,0 +1,21 @@
+using System.Collections.Generic;
+using System.Net.Http;
+using System.Threading.Tasks;
+using Refit;
+
+namespace Start.Shared.Api {
+	public interface IBookmarkContainersApi {
+		[Get("/")]
+		Task<ApiResponse<IEnumerable<BookmarkContainerDto>>> GetAllBookmarkContainers();
+
+		[Get("/{bookmarkContainerId}")]
+		Task<ApiResponse<BookmarkContainerDto?>> GetBookmarkContainer(int bookmarkContainerId);
+
+		[Post("/Create")]
+		Task<ApiResponse<BookmarkContainerDto?>> CreateBookmarkContainer(
+			[Body(BodySerializationMethod.Serialized)] string title);
+
+		[Delete("/Delete/{bookmarkContainerId}")]
+		Task<HttpResponseMessage> DeleteBookmarkContainer(int bookmarkContainerId);
+	}
+}

Start/Shared/Api/IBookmarksApi.cs

@@ -0,0 +1,15 @@
+using System.Threading.Tasks;
+using Refit;
+
+namespace Start.Shared.Api {
+	public interface IBookmarksApi {
+		[Get("{bookmarkId}")]
+		Task<BookmarkDto?> GetBookmark(int bookmarkId);
+
+		[Post("/Create")]
+		Task CreateBookmark(string title, string url, string? notes, int bookmarkGroupId);
+
+		[Delete("/Delete/{bookmarkId}")]
+		Task DeleteBookmark(int bookmarkId);
+	}
+}

Start/Shared/Start.Shared.csproj

@@ -9,4 +9,14 @@
   <ItemGroup>
     <SupportedPlatform Include="browser" />
   </ItemGroup>
+  <ItemGroup>
+    <None Remove="Refit" />
+    <None Remove="Api\" />
+  </ItemGroup>
+  <ItemGroup>
+    <Folder Include="Api\" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Refit" Version="6.1.15" />
+  </ItemGroup>
 </Project>