WokerTask/extend/IFlytek/Xfyun/Speech/TtsClient.php

<?php

/**
 * Copyright 1999-2021 iFLYTEK Corporation
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

namespace IFlytek\Xfyun\Speech;

use Exception;
use IFlytek\Xfyun\Speech\Config\TtsConfig;
use IFlytek\Xfyun\Speech\Constants\TtsConstants;
use IFlytek\Xfyun\Speech\Traits\TtsTrait;
use IFlytek\Xfyun\Core\Handler\WsHandler;
use IFlytek\Xfyun\Core\WsClient;
use IFlytek\Xfyun\Core\Traits\SignTrait;
use Psr\Log\LoggerInterface;

/**
 * 语音合成客户端
 *
 * @author guizheng@iflytek.com
 */
class TtsClient
{
    use SignTrait;
    use TtsTrait;

    /**
     * @var string app_id
     */
    protected $appId;

    /**
     * @var string api_key
     */
    protected $apiKey;

    /**
     * @var string api_secret
     */
    protected $apiSecret;

    /**
     * @var array 合成参数配置
     */
    protected $requestConfig;

    /**
     * @var LoggerInterface or null 日志处理
     */
    protected $logger;

    public function __construct($appId, $apiKey, $apiSecret, $requestConfig = [], $logger = null)
    {
        $this->appId = $appId;
        $this->apiKey = $apiKey;
        $this->apiSecret = $apiSecret;
        $this->requestConfig = new TtsConfig($requestConfig);
        $this->logger = $logger;
    }

    /**
     * 合成文本，并返回结果(字节数组)在Response->getBody()->getContents()
     *
     * @param string $text 待合成的文本
     * @return \GuzzleHttp\Psr7\Response
     * @throws Exception
     */
    public function request($text)
    {
        $ttsHandler = new WsHandler(
            $this->signUriV1(TtsConstants::URI, [
                'appId' => $this->appId,
                'apiKey' => $this->apiKey,
                'apiSecret' => $this->apiSecret,
                'host' => TtsConstants::HOST,
                'requestLine' => TtsConstants::REQUEST_LINE,
            ]),
            $this->generateInput($text, $this->appId, $this->requestConfig->toArray())
        );
        if ($this->logger) {
            $ttsHandler->setLogger($this->logger);
        }
        $client = new WsClient([
            'handler' => $ttsHandler
        ]);
        return $client->sendAndReceive();
    }

    function assembleAuthUrl($addr,$method='GET') {
        $apiKey=$this->apiKey;
        $apiSecret=$this->apiSecret;
        if ($apiKey == "" && $apiSecret == "") { // 不鉴权
            return $addr;
        }
        
        $ul = parse_url($addr); // 解析地址
        if ($ul === false) { // 地址不对，也不鉴权
            return $addr;
        }
        // // $date = date(DATE_RFC1123); // 获取当前时间并格式化为RFC1123格式的字符串
        $timestamp = time();
        $rfc1123_format = gmdate("D, d M Y H:i:s \G\M\T", $timestamp);
        // $rfc1123_format = "Mon, 31 Jul 2023 08:24:03 GMT";
        // 参与签名的字段 host, date, request-line
        $signString = array("host: " . $ul["host"], "date: " . $rfc1123_format, $method . " " . $ul["path"] . " HTTP/1.1");
        // 对签名字符串进行排序，确保顺序一致
        // ksort($signString);
        // 将签名字符串拼接成一个字符串
        $sgin = implode("\n", $signString);
        // 对签名字符串进行HMAC-SHA256加密，得到签名结果
        $sha = hash_hmac('sha256', $sgin, $apiSecret,true);
        
        $signature_sha_base64 = base64_encode($sha);
        
        // 将API密钥、算法、头部信息和签名结果拼接成一个授权URL
        $authUrl = "api_key=\"$apiKey\",algorithm=\"hmac-sha256\",headers=\"host date request-line\",signature=\"$signature_sha_base64\"";
        // 对授权URL进行Base64编码，并添加到原始地址后面作为查询参数
        $authAddr = $addr . '?' . http_build_query(array(
            'host' => $ul['host'],
            'date' => $rfc1123_format,
            'authorization' => base64_encode($authUrl),
        ));
        return $authAddr;
    }
}