微信分享微信公衆賬號設置，服務器端代碼

微信公衆賬號

需要一個認證的微信公衆號，一定要確定認證

在登錄微信公衆平臺https://mp.weixin.qq.com
在公衆號設置–>功能設置，填寫設置Js接口安全域名、網頁授權域名、業務域名

開始做之前，網上有些文檔，只是說要設置js接口安全域名，結果一直報錯 40048,invalid url domain

說是域名不合法，最後查到一個文章說 最好把網頁授權域名、業務域名跟js接口安全域名保持一致。

設置以後，不報錯了。

 

服務器端php代碼

獲取簽名等信息，必須通過服務器返回，不能在前端js生成

代碼是在laravel框架中寫的

路由

//獲取微信分享config
Route::get('getWechatConfig', 'ApiWeChatController@getWechatConfig');

控制器

<?php


namespace App\Http\Controllers\Api;


use App\Extend\WeChat\JSSDK;

class ApiWeChatController extends ApiCommonController
{
    /**
     * 獲取微信分享配置
     */
    public function getWechatConfig()
    {
        $url = request()->input('url');
        $jssdk = new JSSDK("開發者ID(AppID)", "開發者密碼(AppSecret)");
        $return = $jssdk->GetSignPackage($url);
        $this->setReturn(1, '成功', $return);
    }
}

jssdk.php

<?php
namespace App\Extend\WeChat;

use Illuminate\Support\Facades\Cache;

class JSSDK
{
    private $appId;
    private $appSecret;

    public function __construct($appId, $appSecret)
    {
        $this->appId = $appId;
        $this->appSecret = $appSecret;
    }

    public function getSignPackage($url)
    {
        $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();

        // 這裏參數的順序要按照 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
        $data = json_decode($this->get_php_file("jsapi_ticket"));
        if (empty($data)) {
            $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;
                $this->set_php_file("jsapi_ticket", json_encode($data));
            }
        } 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
        $data = json_decode($this->get_php_file("access_token.php"));
        if (empty($data)) {
            // 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;
                $this->set_php_file("access_token", json_encode($data));
            }
        } 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);
        // 爲保證第三方服務器與微信服務器之間數據傳輸的安全性，所有微信接口採用https方式調用，必須使用下面2行代碼打開ssl安全校驗。
        // 如果在部署過程中代碼在此處驗證失敗，請到 http://curl.haxx.se/ca/cacert.pem 下載新的證書判別文件。
        $debug = config('app.debug');
        if(!$debug) {
            curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, true);
            curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 2);
        }else{
            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;
    }

    private function get_php_file($filename)
    {
        return Cache::get($filename);
    }

    private function set_php_file($filename, $content)
    {
        Cache::put($filename, $content, 119);
    }
}

剩下的就交給前端來操作就可以了！