Question

我正在尝试在 Unity3D 中调用 Microsoft Bing Text to Speech API 。

此API需要 accessToken 以及将在请求标头中传递的其他参数。首先，为了获得 accessToken ，我已向令牌API 发送了POST请求，之后，我已在请求标头中发送了其他参数，它在 Postman 中完美地工作（返回Wav audioclip），如下所示：

为了在Unity中实现这一点，我使用 UnityWebRequest 类发送两个 POST请求（顺序），然后接收音频响应

using System.Collections;
using System.Xml.Linq;
using UnityEngine;
using UnityEngine.Networking;

public class TextToSpeech : MonoBehaviour
{
    public AudioSource audioSource;
    public static readonly string accessUri = "https://api.cognitive.microsoft.com/sts/v1.0/issueToken";
    public static readonly string synthesizeUri = "https://speech.platform.bing.com/synthesize";
    public string textToSpeak = "Oh yeah! Finally Dorot is speaking.";
    private static string accessToken;
    private static readonly string apiKey = "MY API KEY";
    private string postStringData;

    public TextToSpeech (string textToSpeak)
    {
        this.textToSpeak = textToSpeak;
    }

    public void Speak()
    {
        audioSource = gameObject.GetComponent<AudioSource>();
        StartCoroutine(RequestToken(apiKey));
    }

    private string GenerateSsml(string textToSpeak)
    {
        var ssmlDoc = new XDocument(
                          new XElement("speak",
                              new XAttribute("version", "1.0"),
                              new XAttribute(XNamespace.Xml + "lang", "en-US"),
                              new XElement("voice",
                                  new XAttribute(XNamespace.Xml + "lang", "en-US"),
                                  new XAttribute(XNamespace.Xml + "gender", "Male"),
                                  new XAttribute("name", "Microsoft Server Speech Text to Speech Voice (en-US, BenjaminRUS)"),
                                  textToSpeak)));
        return ssmlDoc.ToString();
    }

    public IEnumerator RequestToken(string apiKey)
    {
        var tokenRequest = UnityWebRequest.Post(accessUri, "data");
        tokenRequest.SetRequestHeader("Ocp-Apim-Subscription-Key", apiKey);

        var tokenResponse = tokenRequest.SendWebRequest();
        yield return tokenResponse;

        if (tokenRequest.isHttpError)
        {
            Debug.LogError("HTTP Error: " + tokenRequest.error + " Code: " + tokenRequest.responseCode);
        }
        else
        {
            postStringData = GenerateSsml(textToSpeak);
            accessToken = tokenRequest.downloadHandler.text;
            Debug.Log("Access token: " + accessToken);

            StartCoroutine(Synthesize(postStringData, accessToken));
        }
    }

    public IEnumerator Synthesize(string text, string token)
    {
        var synReq = UnityWebRequest.Post(synthesizeUri, text);
        synReq.SetRequestHeader("Content-Type", "application/ssml+xml");
        synReq.SetRequestHeader("X-Microsoft-OutputFormat", "riff-16khz-16bit-mono-pcm");
        synReq.SetRequestHeader("X-Search-AppId", "07D3234E49CE426DAA29772419F436CA");
        synReq.SetRequestHeader("X-Search-ClientID", "1ECFAE91408841A480F00935DC390960");
        synReq.SetRequestHeader("User-Agent", "Dorot");
        synReq.SetRequestHeader("Authorization", "Bearer " + token);

        var synRes = synReq.SendWebRequest();
        yield return synRes;

        if (synReq.isHttpError)
        {
            Debug.LogError("HTTP Error: " + synReq.error + " Code: " + synReq.responseCode + " isNetworkError: " + synReq.isNetworkError + " isDone: " + synReq.isDone);
        }
        else
        {
            AudioClip cc = DownloadHandlerAudioClip.GetContent(synReq);
            audioSource.clip = cc;
            audioSource.Play();
        }
    }
}

结果，第一个API正确返回了令牌。但是，第二个返回的HTTP代码状态408 ,.像这样：

我该如何解决这个问题？感谢。

Answer 1

找到解决方案。

根据this回答，UnityWebRequest默认情况下chunkedTransfer设置为true。所以你需要这样做：

synReq.chunkedTransfer = false;

顺便说一句：您可以按照本指南为此编写一个单元测试：http://www.invisiblerock.com/unity-test-runner（这就是我尝试的方法）

UnityWebRequest在调用Bing Speech API时返回HTTP状态408

1 个答案: