静态页实现微信页面的分享

网上看了许多静态页面分享，大多数都有很大的问题，那就是签名不正确 invalid signature，总结了一下，基本问题都是PHP里的string里面不对，string要这么写

$string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr&timestamp=$timestamp&url=$url";

还有script获取的地址一定是要转码过的，不带#的，下面这段话是微信官方给的

确保你获取用来签名的url是动态获取的，动态页面可参见实例代码中php的实现方式。如果是html的静态页面在前端通过ajax将url传到后台签名，前端需要用js获取当前页面除去'#'hash部分的链接（可用location.href.split('#')[0]获取,而且需要encodeURIComponent），因为页面一旦分享，微信客户端会在你的链接末尾加入其它参数，如果不是动态获取当前链接，将导致分享后的页面签名失败。

下面是PHP代码：（更改倒数第六行的两个参数，APPID和APPSECRET）

<?php  
$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();  
  
  
    // 这里参数的顺序要按照 key 值 ASCII 码升序排序  
    $string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr&timestamp=$timestamp&url=$url";  //这里经常出问题,一般都是这里出现问题，要留意
  
  
    $signature = sha1($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 应该全局存储与更新，以下代码以写入到文件中做示例  
    $data = json_decode(file_get_contents("jsapi_ticket.json"));  
    if ($data->expire_time < time()) {  
      $accessToken = $this->getAccessToken();  
      // 如果是企业号用以下 URL 获取 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 应该全局存储与更新，以下代码以写入到文件中做示例  
    $data = json_decode(file_get_contents("access_token.json"));  
    if ($data->expire_time < time()) {  
      // 如果是企业号用以下URL获取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;  
  }  
}  
  
$jssdk = new JSSDK("APPID", "APPSECRET",$url);//按照自己的公众号填写  
$signPackage = $jssdk->GetSignPackage();  
// var_dump($signPackage);
$tmp=json_encode(array ('appId'=>$signPackage["appId"],'timestamp'=>$signPackage["timestamp"],'nonceStr'=>$signPackage["nonceStr"],'signature'=>$signPackage["signature"],'url'=>$signPackage["url"]));  
$callback = $_GET['callback'];  
echo $callback.'('.$tmp.')';  
exit;  
?>

然后是JS代码：

<script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>  

<script>  
url = location.href.split('#')[0];
url = encodeURIComponent(url);  
  $.ajax({  
    type : "get",  
    url : "http://xxxxx.com/jssdk.php?url="+url,//替换网址，xxx根据自己jssdk文件位置修改  
    dataType : "jsonp",  
    jsonp: "callback",  
    jsonpCallback:"success_jsonpCallback",  
    success : function(data){  
        wx.config({ 
        debug:false, 
appId: data.appId,  
timestamp: data.timestamp,  
nonceStr: data.nonceStr,  
signature: data.signature,  
jsApiList: [  
       "onMenuShareTimeline", //分享给好友  
       "onMenuShareAppMessage", //分享到朋友圈  
       "onMenuShareQQ",  //分享到QQ  
       "onMenuShareWeibo" //分享到微博  
]  
});  
},  
                error:function(data){  
                    alert("连接失败！");  
                }  
});  
  wx.ready(function (){  
  var shareData = {  
  title: '更换标题',  
  desc: '更换内容',//这里请特别注意是要去除html  
  link: '更换链接',  
  imgUrl: '更换图片'  
  };  
  wx.onMenuShareAppMessage(shareData);  
  wx.onMenuShareTimeline(shareData);  
  wx.onMenuShareQQ(shareData);  
  wx.onMenuShareWeibo(shareData);  
    });  
</script> 
</html>

静态页实现微信页面的分享

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