问JavaScript从音频解析元数据(ICY)

EN

_makeRequest() {
    const request = http.request(this.getConfig('url'));

    console.log("Making request to: " + this.getConfig('url'));

    request.setHeader('Range', 'bytes=0-');
    request.setHeader('User-Agent', 'VLC/2.2.4 LibVLC/2.2.4');
    request.setHeader('Icy-MetaData', '1');
    request.setHeader('Connection', 'close');       
    request.once('response', this._onRequestResponse.bind(this));
    request.once('error', this._onRequestError.bind(this));

    request.end();

    return this;
}

_onRequestResponse(response) {

    console.log("Received response!");
    console.log("Headers:");
    console.log(response.headers['content-type']);

    const icyMetaInt = response.headers['icy-metaint'];

    console.log("icyMetaInt= " + icyMetaInt);

    if (icyMetaInt) {
      const reader = new StreamReader(icyMetaInt);

      reader.on('metadata', metadata => {

        console.log(metadata);

        this._destroyResponse(response);
        this._queueNextRequest(this.getConfig('metadataInterval'));
        this.emit('metadata', metadata);
      });

      response.pipe(reader);
      this.emit('stream', reader);
    } else {
      this._destroyResponse(response);
      this._queueNextRequest(this.getConfig('emptyInterval'));
      this.emit('empty');
    }

return this;
}