Add project files.

SAPIServer.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.34931.43
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SAPIServer", "SAPIServer\SAPIServer.csproj", "{BF824074-4C4E-4DE1-8DCA-F022682B00E1}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{BF824074-4C4E-4DE1-8DCA-F022682B00E1}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{BF824074-4C4E-4DE1-8DCA-F022682B00E1}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{BF824074-4C4E-4DE1-8DCA-F022682B00E1}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{BF824074-4C4E-4DE1-8DCA-F022682B00E1}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {80220FEF-238D-4B58-B201-8960474A4AC1}
+	EndGlobalSection
+EndGlobal

SAPIServer/HTTPServer.cs

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+using System;
+using System.Collections.Generic;
+using System.Net;
+using System.Text;
+using System.Threading;
+
+namespace SAPIServer
+{
+    /// <summary>
+    /// Simple routing HTTP server for .NET Framework
+    /// </summary>
+    class HTTPServer
+    {
+        private bool listening = false;
+        private HttpListener listener;
+        private Dictionary<string, Func<HttpListenerContext, byte[]>> GETListeners;
+        private Dictionary<string, Func<HttpListenerContext, byte[]>> POSTListeners;
+
+        public HTTPServer()
+        {
+            listener = new HttpListener();
+            this.GETListeners = new Dictionary<string, Func<HttpListenerContext, byte[]>>();
+            this.POSTListeners = new Dictionary<string, Func<HttpListenerContext, byte[]>>();
+        }
+
+        public void Get(string uri, Func<HttpListenerContext, byte[]> handler)
+        {
+            if (GETListeners.ContainsKey(uri)) throw new InvalidOperationException("A handler by that URI already exists.");
+            if (!uri.StartsWith("/")) throw new ArgumentException("URIs must start with /");
+            this.GETListeners.Add(uri, handler);
+        }
+
+        public void Post(string uri, Func<HttpListenerContext, byte[]> handler)
+        {
+            if (POSTListeners.ContainsKey(uri)) throw new InvalidOperationException("A handler by that URI already exists.");
+            if (!uri.StartsWith("/")) throw new ArgumentException("URIs must start with /");
+            this.POSTListeners.Add(uri, handler);
+        }
+
+        public void Listen(ushort port)
+        {
+            if (listening) throw new InvalidOperationException("This HTTPServer is already listening.");
+            listening = true;
+            listener.Prefixes.Add(string.Format("http://127.0.0.1:{0}/", port));
+            listener.Start();
+            while (listener.IsListening)
+            {
+                var context = listener.GetContext();
+                ThreadPool.QueueUserWorkItem(_ =>
+                {
+                    Dictionary<string, Func<HttpListenerContext, byte[]>> handlerDict;
+                    // TODO: Make query params parsable
+                    var uri = context.Request.RawUrl.Split('?')[0];
+                    byte[] response;
+                    switch (context.Request.HttpMethod)
+                    {
+                        case "GET":
+                            {
+                                handlerDict = GETListeners;
+                                break;
+                            }
+                        case "POST":
+                            {
+                                handlerDict = POSTListeners;
+                                break;
+                            }
+                        default:
+                            {
+                                response = Encoding.UTF8.GetBytes($"Method not allowed: {context.Request.HttpMethod}");
+                                context.Response.StatusCode = 405;
+                                context.Response.ContentType = "text/plain";
+                                context.Response.ContentLength64 = response.Length;
+                                context.Response.OutputStream.Write(response, 0, response.Length);
+                                context.Response.OutputStream.Close();
+                                return;
+                            }
+                    }
+                    if (!handlerDict.TryGetValue(uri, out var handler))
+                    {
+                        response = Encoding.UTF8.GetBytes($"No route defined for {uri}");
+                        context.Response.StatusCode = 404;
+                        context.Response.ContentType = "text/plain";
+                    }
+                    else response = handler(context);
+                    context.Response.ContentLength64 = response.Length;
+                    context.Response.OutputStream.Write(response, 0, response.Length);
+                    context.Response.OutputStream.Close();
+                    Console.WriteLine($"[{DateTime.Now:u}] {context.Request.RemoteEndPoint.Address} - {context.Request.HttpMethod} {context.Request.RawUrl} - {context.Response.StatusCode}");
+                });
+            }
+        }
+    }
+}

SAPIServer/Program.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Speech.Synthesis;
+using System.Text;
+using Newtonsoft.Json;
+
+namespace SAPIServer
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            var http = new HTTPServer();
+            http.Get("/api/voices", ctx =>
+            {
+                using (var synth = new SpeechSynthesizer())
+                {
+                    ctx.Response.ContentType = "application/json";
+                    return Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(new VoicesResponse
+                    {
+                        voices = synth.GetInstalledVoices().Select(v => v.VoiceInfo.Name).ToArray()
+                    }));
+                }
+            });
+            http.Post("/api/synthesize", ctx =>
+            {
+                SynthesizePayload body;
+                try
+                {
+                    string bodyraw;
+                    using (var reader = new StreamReader(ctx.Request.InputStream))
+                    {
+                        bodyraw = reader.ReadToEnd();
+                    }
+                    body = JsonConvert.DeserializeObject<SynthesizePayload>(bodyraw);
+                }
+                catch (Exception e)
+                {
+                    ctx.Response.StatusCode = 400;
+                    return Encoding.UTF8.GetBytes("Bad payload");
+                }
+                if (body == null || body.text == null || body.voice == null)
+                {
+                    ctx.Response.StatusCode = 400;
+                    return Encoding.UTF8.GetBytes("Bad payload");
+                }
+                using (var ms = new MemoryStream())
+                using (var synth = new SpeechSynthesizer())
+                {
+                    if (!synth.GetInstalledVoices().Any(v => v.VoiceInfo.Name == body.voice))
+                    {
+                        ctx.Response.StatusCode = 400;
+                        return Encoding.UTF8.GetBytes("Voice not found");
+                    }
+                    synth.SelectVoice(body.voice);
+                    synth.SetOutputToWaveStream(ms);
+                    synth.Speak(body.text);
+                    ctx.Response.ContentType = "audio/wav";
+                    return ms.ToArray();
+                }
+            });
+            http.Listen(8080);
+        }
+    }
+}

SAPIServer/Properties/AssemblyInfo.cs

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+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("SAPIServer")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("SAPIServer")]
+[assembly: AssemblyCopyright("Copyright ©  2024")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible
+// to COM components.  If you need to access a type in this assembly from
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("bf824074-4c4e-4de1-8dca-f022682b00e1")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

SAPIServer/SAPIServer.csproj

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+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{BF824074-4C4E-4DE1-8DCA-F022682B00E1}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <RootNamespace>SAPIServer</RootNamespace>
+    <AssemblyName>SAPIServer</AssemblyName>
+    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <Deterministic>true</Deterministic>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="Newtonsoft.Json, Version=13.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
+      <HintPath>..\packages\Newtonsoft.Json.13.0.3\lib\net40\Newtonsoft.Json.dll</HintPath>
+    </Reference>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Speech" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="HTTPServer.cs" />
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="SynthesizePayload.cs" />
+    <Compile Include="VoicesResponse.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>

SAPIServer/SynthesizePayload.cs

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+namespace SAPIServer
+{
+    class SynthesizePayload
+    {
+        public string voice { get; set; }
+        public string text { get; set; }
+    }
+}

SAPIServer/VoicesResponse.cs

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+namespace SAPIServer
+{
+    class VoicesResponse
+    {
+        public string[] voices { get; set; }
+    }
+}

SAPIServer/packages.config

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+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Newtonsoft.Json" version="13.0.3" targetFramework="net40" />
+</packages>