使用PHP SDK的Amazon Polly实施

Question

我正在尝试使用Amazon的PHP SDK将Amazon Polly Web服务集成到我的一个项目中。但是，当我使用PollyClient SDK时，客户端中仅实现一种方法createSynthesizeSpeechPreSignedUrl()，它返回url，而不返回音频剪辑。当我尝试将URL粘贴到浏览器窗口中时，出现以下错误："message": "The security token included in the request is invalid."

请查看我的代码段：

error_reporting(E_ALL);
ini_set('display_errors', 1);
header('Content-Type: text/plain; charset=utf-8');
require_once 'app/aws/aws-autoloader.php';
use Aws\Polly\PollyClient;

class TestPolly extends Base {
    public function newPolly () {
        $connection = [
            'region'      => 'us-west-2',
            'version'     => 'latest',
            'debug'       => true,
            'scheme'      => 'http',
            'credentials' => [
                'key'    => 'XXXXX',
                'secret' => 'XXXXXX',
            ],
        ];
        $client     = new PollyClient($connection);
        $polly_args = [
            'OutputFormat' => 'mp3',
            'Text'         => 'My Input text',
            'TextType'     => 'text',
            'VoiceId'      => 'Brain',
        ];
        $result     = $client->synthesizeSpeech($polly_args);

        echo '<pre>';
        print_r($result);
        exit;
    }
}

我收到的PHP错误是：

Fatal error Uncaught exception 'Aws\Polly\Exception\PollyException' with message 'Error executing "SynthesizeSpeech on http://polly.us-west-2.amazonaws.com/v1/speech

 AWS HTTP error: cURL error 7: Failed to connect to polly.us-west-2.amazonaws.com port 80: Connection refused (see http://curl.haxx.se/libcurl/c/libcurl-errors.html)'

exception 'GuzzleHttp\Exception\ConnectException' with message 'cURL error 7: Failed to connect to polly.us-west-2.amazonaws.com port 80: Connection refused (see http://curl.haxx.se/libcurl/c/libcurl-errors.html)' in D:\xampp\htdocs\sim_aws\aws\GuzzleHttp\Handler\CurlFactory.php:186
Stack trace:

有趣的是，我能够使用Node.js SDK生成音频剪辑​​，因此，我很确定访问密钥和秘密密钥可以正常工作。

如果有人可以指出如何将PHP SDK与示例代码或有用链接一起使用，那就太好了。

Answer 1

这是一些示例代码，可在浏览器中将TTS下载为.mp3文件，关键部分是$result->get('AudioStream')->getContents()，这是获取实际.mp3数据的原因。

require_once 'app/aws/aws-autoloader.php';
$awsAccessKeyId = 'XXXXXXX';
$awsSecretKey   = 'XXXXXXX';
$credentials    = new \Aws\Credentials\Credentials($awsAccessKeyId, $awsSecretKey);
$client         = new \Aws\Polly\PollyClient([
    'version'     => '2016-06-10',
    'credentials' => $credentials,
    'region'      => 'us-east-1',
]);
$result         = $client->synthesizeSpeech([
    'OutputFormat' => 'mp3',
    'Text'         => "My input text",
    'TextType'     => 'text',
    'VoiceId'      => 'Joanna',
]);
$resultData     = $result->get('AudioStream')->getContents();

header('Content-Transfer-Encoding: binary');
header('Content-Type: audio/mpeg, audio/x-mpeg, audio/x-mpeg-3, audio/mpeg3');
header('Content-length: ' . strlen($resultData));
header('Content-Disposition: attachment; filename="pollyTTS.mp3"');
header('X-Pad: avoid browser bug');
header('Cache-Control: no-cache');

echo $resultData;

至于链接，这里有一些：

• Polly文档：http : //docs.aws.amazon.com/aws-sdk-php/v3/api/api-polly-2016-06-10.html
• Polly定价：https：//aws.amazon.com/polly/pricing/
• AWS PHP SDK入门：http : //docs.aws.amazon.com/aws-sdk-php/v3/guide/getting-started/