Question

我正在使用node-youtube（data api）来获取youtube-saerch的结果。当我写作 res.render('index',{data:(JSON.stringify(result, null, 2))});然后我得到两个结果。但是当我写res.render('index',{data:result});时，我只得到结果。如何通过简单地写res.render('index',{data:result});来获得更多结果而不是写

   res.render('index',{data:(JSON.stringify(result, null, 2))});

以下是getbyId（）metod的代码。

var YouTube = require('youtube-node');

var youTube = new YouTube();
youTube.setKey('*************************');

youTube.getById('HcwTxRuq-uk', function(error, result) {
  if (error) {
    console.log(error);
  }
  else {
    res.render('index',{data:(JSON.stringify(result, null, 2))});
  }
});

我也尝试过JSON.parse（）方法。像这样

var str=(JSON.stringify(result, null, 3));
var data=JSON.parse(str);

在str中有3个结果，但在数据中只有1个结果。为什么它回归一个结果。我也可以使用JSON.parse（）获得3个结果。

Answer 1

我知道这不是你的问题，但我认为它可以帮助你了解我在我的一个项目中的表现。

如果您的视频位于播放列表中，则可以同时获取最多50个视频，如果您想要播放列表中的更多视频，请使用pageToken获取更多视频。

您可以像这样获取播放列表：

/**
    * Return an array about the videos contained in the GEM-MECHANIC playlist (based on the selected language).
    *
    * @param $errorMessage String to return the error message.
    * @param $language Int language code for which we must fetch the video (default 1 = english)
    * @param $maxVideo Int maximum of video we must fetch with the request (<= 0 mean infinite, 5 if invalid)
    * @param $playList Int Playlist which want to fetch (Use PlayList class constants).
    *
    * @return Bidimensionnal Array
    */
    static public function getVideoList(&$errorMessage, $language = 1, $maxVideo = 0, $playList = PlayList::GEM_CAR){

        $errorMessage = "";

        $list = array();

        $gemPlayList = self::getPlayList($playList);

        if (array_key_exists($language, $gemPlayList)){

            if (!is_numeric($maxVideo) or $maxVideo < 0){

                $maxVideo = 5;
            }

            $list = self::fetchVideoList($errorMessage, $gemPlayList[$language], $maxVideo);
        }
        elseif(empty($gemPlayList)){

            $errorMessage = GeneralDbManager::getInstance()->getErrorMessage("GEM_MECHANIC_INVALID_PLAYLIST_ERR", "The selected playlist doesn't exists.");
        }
        else{

            $errorMessage = GeneralDbManager::getInstance()->getErrorMessage("GEM_MECHANIC_INVALID_LANGUAGE_ERR", 'The selected playlist do not contains videos for the language selected.');
        }

        return $list;
    }


    /**
    * Return an array about the videos contained in the GEM-MECHANIC playlist (based on the selected language).
    *
    * @param $errorMessage String to return the error message.
    * @param $playListId String id of the youtube playlist for which we want to fetch the video list.
    * @param $maxVideo Int maximum of video we must fetch with the request
    * @param $maxVideo Int number of videos with fetched so far.
    * @param $nextToken String to use to fetch more videos.
    *
    * @return Bidimensionnal Array
    */
    private static function fetchVideoList(&$errorMessage, $playListId, $maxVideo, $currentCount = 0, $nextToken = "", $currentList = array()){

        if ($currentCount < $maxVideo or $maxVideo === 0) {

            $result = abs($maxVideo - $currentCount);

            $param = array('playlistId' => $playListId);

            if ($result > 50 or $result === 0){

                $param['maxResults'] = 50;

                $result = 50;
            }
            else{

                $param['maxResults'] = $result;
            }

            if (!empty($nextToken)){

                $param['pageToken'] = $nextToken;   
            }

            try{

                $client = new Google_Client();

                $client->setDeveloperKey(self::$apiKey);

                $youtube = new Google_Service_YouTube($client);

                $playList = $youtube->playlistItems->listPlaylistItems('contentDetails, snippet', $param);


                unset($youtube);

                unset($client);


                foreach($playList as $video){

                    $currentList[] = array('id' => $video['contentDetails']['videoId'], "title" => $video['snippet']['title'], "check" => 0);
                }


                $currentCount += $result;

                if (empty($errorMessage) and !is_null($playList['nextPageToken']) and $currentCount < $maxVideo){

                    self::fetchVideoList($errorMessage, $language, $maxVideo, $currentCount, $playList['nextPageToken'], $currentList); 
                }

                unset($playList);

            }
            catch (Google_Exception $exception) {

                ExceptionLogger::logException($exception);

                $errorMessage = GeneralDbManager::getInstance()->getErrorMessage("GEM_MECHANIC_CANT_FETCH_VIDEO_ERR", 'We are currently not able to fetch the video list from Youtube.');
            }
        }

        return $currentList;
    }

Answer 2

我希望这就是你想要的

另请注意根本不需要JSON.stringify

var YouTube = require('youtube-node');

var youTube = new YouTube();
youTube.setKey('************************************');

youTube.search('World War z Trailer', 2, function(error, result) {
    if (error) {
        console.log(error);
    } else {

        // result should contain 2 videos with some info
        // to get more info use getById

        var videos = [];

        var video1 = result.items[0].id.videoId;
        var video2 = result.items[1].id.videoId;

        //get 1st video
        youTube.getById(video1, function(error, result) {
            if (!error) videos.push(result.items[0]);

            // get 2nd video
            youTube.getById(video2, function(error, result) {
                if (!error) videos.push(result.items[0]);

                //console.log(videos[0]);
                //console.log(videos[1]);
               res.render('index',{data:videos)});

            });

        });
    }
});

如何使用node-youtube getbyId（）方法获得更多结果

2 个答案: