IBM Watson speech to text WebSocket authorization with IAM API 密钥

Question

我正在尝试使用仅具有 IAM 授权的新帐户连接到 IBM Watson 的语音以发送文本 WebSocket。

我的 WS 端点是 wss://stream-fra.watsonplatform.net/text-to-speech/api/v1/recognize，我通过 https://iam.bluemix.net/identity/token 获得了一个访问令牌。现在，当我用 Authorization header 和值 Bearer token 打开套接字连接时，我得到一个错误的握手响应：websocket: bad handshake, Unauthorized 401。语言是围棋。

我是不是做错了什么，或者在没有 username/password 身份验证的情况下无法将 Watson 的语音连接到文本 WebSocket，即已弃用的 watson-token？

编辑：

打开WebSocket的代码：

headers := http.Header{}
headers.Set("Authorization", "Bearer " + access_token)
conn, resp, err := websocket.DefaultDialer.Dial("wss://stream-fra.watsonplatform.net/text-to-speech/api/v1/recognize", headers)

我也尝试过 apikey:**api_key** 的基本授权，结果是一样的：401.

编辑 2：

用于获取成功的访问令牌（基于 Watson Swift 和 Python SDK）以及 returns 访问和刷新令牌的代码：

func getWatsonToken(apiKey string) (string, error) {
    // Base on the Watson Swift and Python SDKs
    // https://github.com/watson-developer-cloud/restkit/blob/master/Sources/RestKit/Authentication.swift
    // https://github.com/watson-developer-cloud/python-sdk/blob/master/watson_developer_cloud/iam_token_manager.py

    const tokenUrl = "https://iam.bluemix.net/identity/token"

    form := url.Values{}
    form.Set("grant_type", "urn:ibm:params:oauth:grant-type:apikey")
    form.Set("apikey", apiKey)
    form.Set("response_type", "cloud_iam")

    // Token from simple "http.PostForm" does not work either
    //resp, err := http.PostForm(tokenUrl, form)

    req, err := http.NewRequest(http.MethodPost, tokenUrl, nil)
    if err != nil {
        log.Printf("could not create HTTP request to get Watson token: %+v", err)
        return "", nil
    }

    header := http.Header{}
    header.Set("Content-Type", "application/x-www-form-urlencoded")
    header.Set("Accept", "application/json")
    // "Yng6Yng=" is "bx:bx"
    header.Set("Authorization", "Basic Yng6Yng=")
    req.Header = header

    req.Body = ioutil.NopCloser(bytes.NewReader([]byte(form.Encode())))

    resp, err := http.DefaultClient.Do(req)
    if err != nil {
        log.Printf("problem executing HTTP request to get Watson token: %+v", err)
        return "", err
    }

    defer resp.Body.Close()

    if resp.StatusCode != 200 {
        return "", errors.New(fmt.Sprintf("failed to get Watson token: %d", resp.StatusCode))
    }

    jsonBody, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        log.Printf("problem reading Watson token from response body: %+v", err)
    }

    tokenResponse := &struct {
        AccessToken  string `json:"access_token"`
        RefreshToken string `json:"refresh_token"`
        TokenType    string `json:"token_type"`
        ExpiresIn    int64  `json:"expires_in"`
        Expiration   int64  `json:"expiration"`
    }{}

    err = json.Unmarshal(jsonBody, tokenResponse)
    if err != nil {
        log.Printf("could not parse Watson token response: %+v", err)
        return "", err
    }

    return tokenResponse.AccessToken, err
}

Answer 1

我在端点中出错，使用了文本转语音而不是语音转文本。使用正确的 URL WebSocket API 工作。

wss://stream-fra.watsonplatform.net/text-to-speech/api/v1/recognize 应该是 wss://stream-fra.watsonplatform.net/speech-to-text/api/v1/recognize

IBM Watson speech to text WebSocket authorization with IAM API 密钥

IBM Watson speech to text WebSocket authorization with IAM API key

speech-recognition

speech-to-text

websocket

ibm-watson