微信JS-SDK說明文檔

微信JS-SDK Demo

我所要實現(xiàn)的分享功能要求：只要提供一段js代碼給前端美工放置在靜態(tài)頁面等就可以實現(xiàn)分享功能。

js代碼如下：

url=location.href;

$.ajax({

type : "get",

url : "http://域名/wx/test/jssdk.php?url="+url,

dataType : "jsonp",

jsonp: "callback",

jsonpCallback:"success_jsonpCallback",

success : function(data){

wx.config({

appId: data.appId,

timestamp: data.timestamp,

nonceStr: data.nonceStr,

signature: data.signature,

jsApiList: [

"onMenuShareTimeline",

"onMenuShareAppMessage"

]

});

},

error:function(data){

alert("連接失敗！");

}

});

wx.ready(function (){

var shareData = {

title: '霾黃色預警昨發(fā)布 冷空氣昨夜到溫 霧霾可能消散',

desc: '在長大的過程中，我才慢慢發(fā)現(xiàn)，我身邊的所有事，別人跟我說的所有事，那些所謂本來如此，注定如此的事，它們其實沒有非得如此，事情是可以改變的。更重要的是，有些事既然錯了，那就該做出改變。',

link: 'http://news.wendu.cn/2015/0127/482049.shtml',

imgUrl: 'http://upload.wendu.cn/2015/0127/1422306020538.jpg'

};

wx.onMenuShareAppMessage(shareData);

wx.onMenuShareTimeline(shareData);

});

為了便于在不同的域名下面頁面調(diào)用，用了jsonp(json的一種使用模式)來解決跨域數(shù)據(jù)訪問的問題。

url=location.href;獲取當前網(wǎng)址，以參數(shù)的方式傳給jssdk.php進行簽名驗證。 ?url : "http://域名/wx/test/jssdk.php?url="+url

jssdk.php是在微信JS-SDK　DEMO的基礎上進行了修改。代碼如下：

$url = $_GET['url'];

class JSSDK {

private $appId;

private $appSecret;

private $url;

public function __construct($appId, $appSecret,$url) {

$this->appId = $appId;

$this->appSecret = $appSecret;

$this->url = $url;

}

public function getSignPackage() {

$jsapiTicket = $this->getJsApiTicket();

$protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://";

// $url = "$protocol$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";

$url =$this->url;

$timestamp = time();

$nonceStr = $this->createNonceStr();

// 這里參數(shù)的順序要按照 key 值 ASCII 碼升序排序

$string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr&timestamp=$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 應該全局存儲與更新，以下代碼以寫入到文件中做示例

$data = json_decode(file_get_contents("jsapi_ticket.json"));

if ($data->expire_time < time()) {

$accessToken = $this->getAccessToken();

// 如果是企業(yè)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("jsapi_ticket.json", "w");

fwrite($fp, json_encode($data));

fclose($fp);

}

} else {

$ticket = $data->jsapi_ticket;

}

return $ticket;

}

private function getAccessToken() {

// access_token 應該全局存儲與更新，以下代碼以寫入到文件中做示例

$data = json_decode(file_get_contents("access_token.json"));

if ($data->expire_time < time()) {

// 如果是企業(yè)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("access_token.json", "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;

}

}

$jssdk = new JSSDK("公眾號", "公眾號密鑰",$url);

$signPackage = $jssdk->GetSignPackage();

$tmp=json_encode(array ('appId'=>$signPackage["appId"],'timestamp'=>$signPackage["timestamp"],'nonceStr'=>$signPackage["nonceStr"],'signature'=>$signPackage["signature"],'url'=>$signPackage["url"]));

$callback = $_GET['callback'];

echo $callback.'('.$tmp.')';

exit;

?>

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