TP5 微信網頁自定義分享類
阿新 • • 發佈:2019-01-05
荊軻刺秦王
上一篇部落格介紹了微信自定義分享內容的獲取微信簽名包的,但是有一個問題就是,微信截至本文發表,仍然對於獲取access_token 有上限,就像這樣:
為了解決這個問題,我們需要將上篇文章的獲取 access_token 的Jssdk 類稍微修改一下:
直接上程式碼:
<?php namespace org\wechat; class JSSDK { private $appId; private $appSecret; private $access_token_url; private $jsapi_ticket_url; public function __construct($appId, $appSecret) { $this->appId = $appId; $this->appSecret = $appSecret; $this->access_token_url = EXTEND_PATH."org\js-sdk\access_token_".$appId.".json"; $this->jsapi_ticket_url = EXTEND_PATH."org\js-sdk\jsapi_ticket_".$appId.".json"; } public function getSignPackage() { $jsapiTicket = $this->getJsApiTicket(); // 注意 URL 一定要動態獲取,不能 hardcode. $protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://"; $url = "$protocol$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]"; $timestamp = time(); $nonceStr = $this->createNonceStr(); // 這裡引數的順序要按照 key 值 ASCII 碼升序排序 $string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr×tamp=$timestamp&url=$url"; $signature = sha1($string); $signPackage = array( "appId" => $this->appId, "nonceStr" => $nonceStr, "timestamp" => $timestamp, "url" => $url, "signature" => $signature, "rawString" => $string ); return $signPackage; } private function createNonceStr($length = 16) { $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; $str = ""; for ($i = 0; $i < $length; $i++) { $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1); } return $str; } private function getJsApiTicket() { // jsapi_ticket 應該全域性儲存與更新,以下程式碼以寫入到檔案中做示例 $data = json_decode(file_get_contents($this->jsapi_ticket_url)); if ($data->expire_time < time()) { $accessToken = $this->getAccessToken(); // 如果是企業號用以下 URL 獲取 ticket // $url = "https://qyapi.weixin.qq.com/cgi-bin/get_jsapi_ticket?access_token=$accessToken"; $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken"; $res = json_decode($this->httpGet($url)); $ticket = $res->ticket; if ($ticket) { $data->expire_time = time() + 7000; $data->jsapi_ticket = $ticket; $fp = fopen($this->jsapi_ticket_url, "w"); fwrite($fp, json_encode($data)); fclose($fp); } } else { $ticket = $data->jsapi_ticket; } return $ticket; } public function getAccessToken() { // access_token 應該全域性儲存與更新,以下程式碼以寫入到檔案中做示例 $data = json_decode(file_get_contents($this->access_token_url)); if ($data->expire_time < time()) { // 如果是企業號用以下URL獲取access_token // $url = "https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid=$this->appId&corpsecret=$this->appSecret"; $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$this->appId&secret=$this->appSecret"; $res = json_decode($this->httpGet($url)); $access_token = $res->access_token; if ($access_token) { $data->expire_time = time() + 7000; $data->access_token = $access_token; $fp = fopen($this->access_token_url, "w"); fwrite($fp, json_encode($data)); fclose($fp); } } else { $access_token = $data->access_token; } return $access_token; } private function httpGet($url) { $curl = curl_init(); curl_setopt($curl, CURLOPT_RETURNTRANSFER, true); curl_setopt($curl, CURLOPT_TIMEOUT, 500); curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false); curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false); curl_setopt($curl, CURLOPT_URL, $url); $res = curl_exec($curl); curl_close($curl); return $res; } }
目錄結構:
注意:這兩個 json 檔案是不需要手動建立的(如果沒有的話,會自動生成)
解釋一下:
首先這個 Jssdk 類在需要呼叫分享介面,或者其他介面時,需要用到 access_token 的時候,會先去 org\js-sdk\jsapi_ticket_".$appId.".json 檔案裡面去找,這兩個檔案裡面的內容:
首先:access_token_wxb010c3cf978e2801.json
{"expire_time":1544671442,"access_token":"19_ZIsw9sNp6GmfG89e3lrl4gwZUJAyzEm9ittvz060mFTRMVsMNjpqYRyhkVwT5wefKWbyIOse25m9Wjqh4pTKRUDiuO_5meOhe-cXt67B7ve4Hp60uyOZO01GbCL9AG7F6oM04bsEAir8TZ_yEMBdADASAP"}
其次:jsapi_ticket_wxb010c3cf978e2801.json
{"expire_time":1544671442,"jsapi_ticket":"kgt8ON2yVITDhtdwci0qeb834GF2Vk7LoytTRYyoUkc_jmXn-B-Us_XzfIi8SUUwHUzZ9EjIgO0GtFZ4Ir88Mw"}
每次,呼叫微信介面的時候,程式都會先判斷這兩個 json 檔案裡面的 expire_time 是否小於當前時間,如果不小於當前時間,那麼會向微信發起請求,獲取 access_token ,獲取完 access_token 以後,會寫入 access_token_wxb010c3cf978e2801.json 檔案一個時間,這個時間是 當前時間的時間戳 + 7000秒,之所以是7000秒,是因為這個 access_token 的有效期是7200秒,所以保險起見,設定為7000秒。這個一般不會有什麼影響。
好了,這樣以來前臺控制器裡面就可以呼叫這個 Jssdk 類 來獲取微信簽名了,就可以實現微信自定義分享了!