C++ Voice Package Download and MD5 Check with Improved Error Handling and Resource Management

void Property::DownloadAndCheck(const std::string& url, const std::string& md5, const std::string& id) { std::string dest_file = VOIP_DOWNLOAD_FILE;

LOGD("DownloadAndCheck, %s url is > %s : md5sum is > %s", dest_file.c_str(), url.c_str(), md5.c_str());

std::unique_ptr<FILE, decltype(&fclose)> fp(fopen(dest_file.c_str(), "wb"), &fclose);
if (!fp) {
    throw SysIOException(dest_file + " : open failed");
}

std::unique_ptr<CURL, decltype(&curl_easy_cleanup)> curl(curl_easy_init(), &curl_easy_cleanup);
if (!curl) {
    throw SysIOException("curl_easy_init failed");
}

curl_easy_setopt(curl.get(), CURLOPT_NOPROGRESS, 0);
curl_easy_setopt(curl.get(), CURLOPT_XFERINFOFUNCTION, progress_func);
curl_easy_setopt(curl.get(), CURLOPT_XFERINFODATA, this);
curl_easy_setopt(curl.get(), CURLOPT_URL, url.c_str());
curl_easy_setopt(curl.get(), CURLOPT_WRITEFUNCTION, &Property::WriteFunc);
curl_easy_setopt(curl.get(), CURLOPT_WRITEDATA, fp.get());
curl_easy_setopt(curl.get(), CURLOPT_CONNECTTIMEOUT, 30);
curl_easy_setopt(curl.get(), CURLOPT_SSL_VERIFYPEER, 0L);
curl_easy_setopt(curl.get(), CURLOPT_SSL_VERIFYHOST, 0L);
curl_easy_setopt(curl.get(), CURLOPT_VERBOSE, 1L);
curl_easy_setopt(curl.get(), CURLOPT_NOSIGNAL, 1);
int voice_upgrade_download_timeout = CFGI2(CONFIG_FILE_GLOBAL_CONFIG, "property_set", "default_voice_upgrade_download_timeout", 180);
curl_easy_setopt(curl.get(), CURLOPT_TIMEOUT, voice_upgrade_download_timeout);

std::exception_ptr exception;
try {
    CURLcode res = curl_easy_perform(curl.get());

    // 获取HTTP状态码
    long httpCode = 0;
    curl_easy_getinfo(curl.get(), CURLINFO_RESPONSE_CODE , &httpCode);

    if (res != 0 || httpCode != 200) {
        FileUtils::RemoveFile(dest_file);
        throw SysIOException("DownLoadAndCheck failed : " + std::to_string(res));
    }

    MD5 md5class;
    char* md5_check = md5class.digestFile(dest_file.c_str());
    LOGD("Download voice md5 is: %s", md5_check);
    std::string src_md5 = md5;
    std::transform(src_md5.begin(), src_md5.end(), src_md5.begin(), ::tolower);
    if (memcmp(md5_check, src_md5.c_str(), 32) != 0) {
        FileUtils::RemoveFile(dest_file);
        throw SysIOException("MD5 Check failed");
    }

    LOGD("DownLoadAndCheck md5 success");

    // 语音包下载成功,开始应用语音包
    if (!id.empty()) {
        if (this->SaveAndApplyVoicePackage(id) == 0) {
            LOGD("SaveAndApplyVoicePackage success.");
            StdIntMsgSharePtr msg = StdIntMsg::Create();
            msg->val              = 100;
            AposSdk::Publish(TOPIC_SWEEP_VOICE_UPDATE_STATUS, msg);
        } else {
            LOGD("SaveAndApplyVoicePackage failed.");
            StdIntMsgSharePtr msg = StdIntMsg::Create();
            msg->val              = -1;
            AposSdk::Publish(TOPIC_SWEEP_VOICE_UPDATE_STATUS, msg);
        }
    }
} catch (...) {
    exception = std::current_exception();
}

if (exception) {
    std::rethrow_exception(exception);
}

}