GoogleHome.cs

using System.IO;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Threading.Tasks;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.Azure.WebJobs.Host;
using Microsoft.WindowsAzure.Storage.Blob;
using Newtonsoft.Json;
using VoiceTextWebAPI.Client;

namespace ChomadoVoice
{
    public static class GoogleHome
    {
        [FunctionName("GoogleHome")]
        public static async Task<HttpResponseMessage> Run(
            [HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)]HttpRequestMessage req
            , /* Azure Blob Storage(ファイル置き場) への出力 */ [Blob("mp3/voice.mp3", FileAccess.ReadWrite)] CloudBlockBlob mp3Out
            , TraceWriter log
        )
        {
            log.Info("C# HTTP trigger function processed a request.");
            var data = await req.Content.ReadAsAsync<Models.DialogFlowResponseModel>();
            //log.Info(data);
            var say = data.Result.ResolvedQuery;

            // VoiceText Web API に投げる処理
            var voiceTextClient = new VoiceTextClient
            {
                APIKey = Keys.APIKeys.VoiceTextWebApiKey,
                Speaker = Speaker.Bear,
                Emotion = Emotion.Anger,
                EmotionLevel = EmotionLevel.High,
                Format = Format.MP3
            };
            var bytes = await voiceTextClient.GetVoiceAsync(text: say);

            // Azure Blob Storage への書き込み（保存）
            await mp3Out.UploadFromByteArrayAsync(buffer: bytes, index: 0, count: bytes.Length);

            // Azure Blob Storage に書き込まれた mp3 にアクセスするための URL
            var mp3Url = mp3Out.Uri;

            var result = req.CreateResponse(HttpStatusCode.OK, new
            {
                // Google Home に喋らせたい文言を渡す。（この場合mp3）
                speech = $"<speak><audio src='{mp3Url}' /></speak>",
                // Google Assistant のチャット画面上に出したい文字列
                displayText = $"「{say}」"
            });
            result.Headers.Add("ContentType", "application/json");
            return result;
        }
        
    }
}