private $app_id = 'wx189ae9fa8816b131';
private $app_secret = '36f5f430c591acbae3505fe877733283';
const API_URL_PREFIX = 'https://api.weixin.qq.com/cgi-bin';
const MEDIA_FOREVER_UPLOAD_URL = '/material/add_material?';
const MEDIA_FOREVER_NEWS_UPLOAD_URL = '/material/add_news?';
const MEDIA_FOREVER_NEWS_UPDATE_URL = '/material/update_news?';
const MEDIA_FOREVER_GET_URL = '/material/get_material?';
const MEDIA_FOREVER_DEL_URL = '/material/del_material?';
const MEDIA_FOREVER_COUNT_URL = '/material/get_materialcount?';
const MEDIA_FOREVER_BATCHGET_URL = '/material/batchget_material?';

 /**
   * 獲取圖片素材接口
   */
  public function get_articles_action(){
   $token = $this->get_access_token();
   $list = $this->getForeverList($token,'image',0,20);
   echo json_encode($list);
  }
  get_access_token方法
  
  private function get_access_token() {
   $access_token = AWS_APP::cache()->get('access_token');
   if(!$access_token){
    error_log('get access_token from weixin ');
    $appId = $this->app_id;
    $appSecret = $this->app_secret;
    $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$appId&secret=$appSecret";
    $res = json_decode($this -> httpGet($url));
    $access_token = $res -> access_token;
    AWS_APP::cache()->set('access_token',$access_token,time()+3600);
   }else{
    error_log('get access_token from cache ');
   }
   error_log('access_token is :'.$access_token);
   return $access_token;
  }

 /**
  * 獲取永久素材列表
  * @param $token
  * @param $type 類型有image,vedio和audio
  * @param $offset 起始位置，0表示從第一個
  * @param $count 個數(shù)，區(qū)間為0~20
  */
  public function getForeverList($token,$type,$offset,$count){
   $data = array(
    'type' => $type,
    'offset' => $offset,
    'count' => $count,
   );
   $result = $this->http_post(
         self::API_URL_PREFIX.self::MEDIA_FOREVER_BATCHGET_URL.'access_token='.$token,
         self::json_encode($data)
         );
   error_log('forever list is :'.$result);
   if ($result)
   {
    $json = json_decode($result,true);
    if (isset($json['errcode'])) {
    $this->errCode = $json['errcode'];
    $this->errMsg = $json['errmsg'];
    return false;
    }
    return $json;
   }
   return false;
  }

/**
 * 同步問答的文章到訂閱號上接口
 */
public function index_action(){
 $article_list = $this->model('article')->get_articles_list(null, 1, 18, 'add_time DESC');
 $access_token = $this->get_access_token();
 $base_url = 'http://wenda.qiezilife.com/article/';
 foreach ($article_list as $key => $article){

  if($article['has_attach']){
   $attaches = $this->model('publish')->get_attach('article', $article['id'], 'max');
   foreach ($attaches as $i => $a){
    //過濾獲取第一張圖片
    if($a['is_image']){
     $attache = $a;
     break;
    }
   }

   $img = $attache['path'];
   $size = filesize($img);
   echo $img.',size is :'.$size;
   echo '<br/>';
   $file_info = array(
    'filename' => $img,
    'content-type' => 'image/jpg', //文件類型
    'filelength' => $size
   );
   $upload_img_result = $this->upload_meterial($file_info,$access_token);
   $media_id = $upload_img_result;
   error_log('media_id is ===============>'.$media_id);
  }else{
   $media_id = '1PoTp0SqruwWu_HX0HR_jUp4STX5HSpYkibb1Ca8ZQA';
  }

  $articles =array();
  //上傳圖片成功了就開始上傳圖文
  $upload_article_data = array(
   'title' => $article['title'],
   'thumb_media_id' => $media_id,
   'author' => '茄子營養(yǎng)師',
   'digest' => '茄子生活，你的品質(zhì)生活指南',
   'show_cover_pic' => 1,
   'content' => $article['message'],
   'content_source_url' => $base_url.$article['id']
  );

  $articles[] = $upload_article_data;

  $data = array(
   'articles' => $articles
  );
  $result= $this->uploadForeverArticles($access_token,$data);
  echo self::json_encode($result);
  error_log('upload_article result is : '.json_encode($result));
  error_log('============================upload end============================');

  }
}