微信JS-SDK自定义分享接入的注意点

微信文档 ，https://developers.weixin.qq.com/doc/offiaccount/OA_Web_Apps/JS-SDK.html，

在用微信自定义分享，遇到了几个坑，记录一下。

注意点1：进入“公众号设置”的“功能设置”里填写“JS接口安全域名”。注意公众号需要认证，否则可能提示使用接口 没有权限；

注意点2：access_token是公众号的全局唯一接口调用凭据，有效时间2小时，注意缓存，不能每次都获取新的，次数一天2000次，可以缓存，或者存入数据表，用时判断当前时间和存入的时间差。实在超过，可在微信后台 接口权限中清空次数，一个月只能清3次。

其中的jsapi_ticket也是，缓存或者存表。

注意点3： 签名的注意事项

注意点4：签名时的url, 在pc的微信中，url没有拼接什么，而在手机的微信中，会在你当前页面上自动拼接上朋友圈 from=timeline，微信群 from=groupmessage，好友分享 from=singlemessage，签名时要注意，不要漏掉，可以在前台ajax请求时，或者当前页面的url,传入后台签名。

注意点5：

在手机微信中这些接口确实已经废弃，用了，就会提示不支持，而在pc微信中，还是用这些，不能用新的

由于pc和手机使用的方法不同，在php中定义了两套，用手机打开时访问一套，pc打开时访问一套，或者弄访问地址完全不一样的页面，pc一个地址，手机一个地址

下面是php中的定义，手机和pc虽然是同一个网址，但是真正访问的还是两套

function is_mobile(){
    $user_agent = $_SERVER['HTTP_USER_AGENT'];

    $mobile_agents = Array("240x320","acer","acoon","acs-","abacho","ahong","airness","alcatel","amoi","android","anywhereyougo.com","applewebkit/525","applewebkit/532","asus","audio","au-mic","avantogo","becker","benq","bilbo","bird","blackberry","blazer","bleu","cdm-","compal","coolpad","danger","dbtel","dopod","elaine","eric","etouch","fly ","fly_","fly-","go.web","goodaccess","gradiente","grundig","haier","hedy","hitachi","htc","huawei","hutchison","inno","ipad","ipaq","ipod","jbrowser","kddi","kgt","kwc","lenovo","lg ","lg2","lg3","lg4","lg5","lg7","lg8","lg9","lg-","lge-","lge9","longcos","maemo","mercator","meridian","micromax","midp","mini","mitsu","mmm","mmp","mobi","mot-","moto","nec-","netfront","newgen","nexian","nf-browser","nintendo","nitro","nokia","nook","novarra","obigo","palm","panasonic","pantech","philips","phone","pg-","playstation","pocket","pt-","qc-","qtek","rover","sagem","sama","samu","sanyo","samsung","sch-","scooter","sec-","sendo","sgh-","sharp","siemens","sie-","softbank","sony","spice","sprint","spv","symbian","tablet","talkabout","tcl-","teleca","telit","tianyu","tim-","toshiba","tsm","up.browser","utec","utstar","verykool","virgin","vk-","voda","voxtel","vx","wap","wellco","wig browser","wii","windows ce","wireless","xda","xde","zte");
    $is_mobile = false;
    foreach ($mobile_agents as $device) {//这里把值遍历一遍，用于查找是否有上述字符串出现过
        if (stristr($user_agent, $device)) { //stristr 查找访客端信息是否在上述数组中，不存在即为PC端。
            $is_mobile = true;
            break;
        }
    }
    return $is_mobile;
}

if(is_mobile()){ //跳转至wap分组
    define('BIND_MODULE','Mobile');
}else{
    define('BIND_MODULE','Home');
}

判断access_token 过期，我这只是2000秒，远远不到7200秒（2小时），

time字段设置为了默认值当前时间

  $access_time = M("dc_weixin")->order("id desc")->getField("time");
        $time = time() - strtotime($access_time);
        if($time>2000){
            $url="https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$this->app_id."&secret=".$this->app_secret;
            $content = file_get_contents($url);
            $result = json_decode($content);
            $data['access_token'] = $result->access_token;
            $weixin = M("dc_weixin")->data($data)->add();
        }

　　//jsapi_ticket

  public function getJk(){
        $this->getToken();
        $access_token =  M("dc_weixin")->order("id desc")->getField("access_token");

        $jk_time = M("dc_jk")->order("id desc")->getField("time");
        $time = time() - strtotime($jk_time);
        if($time>2000){
            $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=".$access_token."&type=jsapi";
            $content = file_get_contents($url);
            $result = json_decode($content);
            $data['jk'] = $result->ticket;
            $weixin = M("dc_jk")->data($data)->add();
        }

    }

 /*
     * 随机字符串
     */
    function create_guid() {
        $charid = strtoupper(md5(uniqid(mt_rand(), true)));
        $hyphen = chr(45);// "-"
        $uuid =
            substr($charid, 0, 8).$hyphen
            .substr($charid, 8, 4).$hyphen
            .substr($charid,12, 4).$hyphen;
        return str_replace("-","",$uuid);
    }

//签名   页面里ajax访问，签名的方法

 public function dcsign_mob(){

        $html = $_SERVER['HTTP_REFERER'];
        $time = strtotime(date('Y-m-d H:i:s',time()));
        $nostr = $this->create_guid();
        $jk=  M("dc_jk")->order("id desc")->getField("jk");

        $url  =  "jsapi_ticket=".$jk."&noncestr=".$nostr."&timestamp=".$time."&url=".$html;
        $signature = sha1($url);

        $data['html'] = $html;
        $data['time'] = $time;
        $data['nostr'] = $nostr;
        $data['signature'] = $signature;
        $this->ajaxReturn($data); //返回到html也中
    }

 $.ajax({
            url: "{:U('**/**')}",
            type: "get",  
            //data:{} //这里没有将页面的url传入签名方法中，
            timeout: 20000, //超时时间设置，单位毫秒
            success: function (data) {

                console.log(data);

                wx.config({
                    debug: true, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。
                    appId: '*****', // 必填，公众号的唯一标识
                    timestamp: data.time, // 必填，生成签名的时间戳
                    nonceStr: data.nostr, // 必填，生成签名的随机串
                    signature: data.signature,// 必填，签名
                    jsApiList: [ 'checkJsApi',
                        'onMenuShareTimeline','onMenuShareAppMessage','updateAppMessageShareData','updateTimelineShareData'] // 必填，需要使用的JS接口列表
                });

                wx.ready(function() {

                    wx.updateAppMessageShareData({
                        title: shareTitle, // 分享标题
                        desc: descContent, // 分享描述
                        link: lineLink, // 分享链接，该链接域名或路径必须与当前页面对应的公众号JS安全域名一致
                        imgUrl: imgUrl, // 分享图标
                        success: function () {
                            // 用户确认分享后执行的回调函数
                        },
                        cancel: function () {
                            // 用户取消分享后执行的回调函数
                        }
                    });
                    wx.updateTimelineShareData({
                        title: shareTitle, // 分享标题
                        desc: descContent, // 分享描述
                        link: lineLink, // 分享链接，该链接域名或路径必须与当前页面对应的公众号JS安全域名一致
                        imgUrl: imgUrl, // 分享图标
                        success: function () {
                            // 用户确认分享后执行的回调函数
                        },
                        cancel: function () {
                            // 用户取消分享后执行的回调函数
                        }
                    });

                });

            },
            error: function (xhr, textStatus, errorThrown) {
                /*错误信息处理*/
                alert("进入error---");
                alert("状态码："+xhr.status);
                alert("状态:"+xhr.readyState);//当前状态,0-未初始化，1-正在载入，2-已经载入，3-数据进行交互，4-完成。
                alert("错误信息:"+xhr.statusText );
                alert("返回响应信息："+xhr.responseText );//这里是详细的信息
                alert("请求状态："+textStatus);
                alert(errorThrown);
                alert("请求失败");
            },
            complete: function (XMLHttpRequest, status) {
                if (status == 'timeout') {
                    layer.msg("请求超时，请稍后再试！");
                    layer.close(index);
                }
            }
        });