寫小程序發(fā)現(xiàn)微信支付有了v3版本, 就想著接個新的支付看看, 結(jié)果發(fā)現(xiàn),有毒,記錄一下歷程

先是統(tǒng)一下單

//統(tǒng)一下單
public?function?wechartAddOrder($name,$ordernumber,$money,$openid){
????????$url?=?"https://api.mch.weixin.qq.com/v3/pay/transactions/jsapi";
????????$urlarr?=?parse_url($url);
????????$appid?=?config('config.appId');//appID
????????$mchid?=?config('config.mchid');//商戶ID
????????$xlid?=?config('config.apiXL');//API序列號
????????$data?=?array();
????????$randstr?=?getRanStr(16,false);//隨機字符串長度不超過32
????????$time?=?time();
????????$data['appid']?=?$appid;
????????$data['mchid']?=?$mchid;
????????$data['description']?=?$name;//商品描述
????????$data['out_trade_no']?=?$ordernumber;//訂單編號
????????$data['notify_url']?=?"https://www.xffly.cn/api/admin/order/wechartCallback";//回調(diào)接口
//??????$data['amount']['total']?=?$money;//金額
????????$data['amount']['total']?=?1;
????????$data['payer']['openid']?=?$openid;//用戶openID
????????$data?=?json_encode($data);?
????????$key?=?$this->getSign($data,$urlarr['path'],$randstr,$time);//簽名
????????$token?=?sprintf('mchid="%s",serial_no="%s",nonce_str="%s",timestamp="%d",signature="%s"',$mchid,$xlid,$randstr,$time,$key);//頭部信息
????????$header??=?array(
????????????'Content-Type:'.'application/json;?charset=UTF-8',
????????????'Accept:application/json',
????????????'User-Agent:*/*',
????????????'Authorization:?WECHATPAY2-SHA256-RSA2048?'.$token
????????);??
????????$ret?=?curl_post_https($url,$data,$header);
????????return?$ret;
????}

計算簽名, ?也是按照文檔弄了好多遍

//微信支付簽名
public?function?getSign($data=array(),$url,$randstr,$time){
????????$str?=?"POST"."\n".$url."\n".$time."\n".$randstr."\n".$data."\n";
????????$key?=?file_get_contents('apiclient_key.pem');//在商戶平臺下載的秘鑰
????????$str?=?getSha256WithRSA($str,$key);
????????return?$str;
????}

通過統(tǒng)一下單接口得到prepay_id
在小程序里面用他的wx.requestPayment接口調(diào)起支付,沒啥含量,不貼代碼了,照著文檔寫
其中調(diào)起支付還需要一個簽名,同理

//調(diào)起支付的簽名
public?function?getWechartSign($post){
????????$data?=?array();
????????$data['timeStamp']?=?$post['timeStamp'];
????????$data['nonceStr']?=?$post['str'];
????????$data['package']?=?$post['package'];
????????$str?=?config('config.appId')."\n".$data['timeStamp']."\n".$data['nonceStr']."\n".$data['package']."\n";
????????$key?=?file_get_contents('apiclient_key.pem');
????????$str?=?getSha256WithRSA($str,$key);
????????return?$str;
????}

重點是支付成功的回調(diào),簡直有毒
返回回來的json信息, ? json_decode解析就成了空, ?復(fù)制出來再解析是可以解析的,說是他有bom信息吧, 弄了也不好使, ? 用htmlspecialchars_decode轉(zhuǎn)義一下, ?調(diào)試工具可以成功, 可是真實微信支付,還是不行,最后沒辦法, 存的log里面, 自己再取一下,就可以用了

//微信回調(diào)寫入日志文件并返回
????public?function?writeWechartLog($post){
????????if(!is_dir("upload/log")){
???????????mkdir("upload/log",0777,true);
????????}
????????$log?=?fopen("upload/log/wechart.txt",?"a+");
????????if(is_array($post)){
????????????$post?=?json_encode($post);
????????}
????????fwrite($log,?$post."\n");
????????fclose($log);
????????$read?=?fopen("upload/log/wechart.txt",?"r");
????????fseek($read,?-1,?SEEK_END);
????????$s?=?'';
????????while?(($c?=?fgetc($read))?!==?false)?{
????????????if?($c?==?"\n"?&&?$s)?break;
????????????$s?=?$c?.?$s;
????????????fseek($read,?-2,?SEEK_CUR);
????????}
????????fclose($read);
????????return?$s;//取剛剛存的最后一條回調(diào)信息
????}

回調(diào)信息里面,有個加密的東西,還得解密一下,這個傳入的是自己又從log里面取出來的數(shù)據(jù)
sodium_crypto_aead_aes256gcm_decrypt ?這個解密密方法需要php擴展 sodium

//微信回調(diào)解密
????public?function?wechartDecrypt($str)?{
????????$str?=?htmlspecialchars_decode($str,ENT_COMPAT);
????????$post?=?json_decode($str,true);
????????$key?=?config("config.apiv3Key");//商戶平臺設(shè)置的api?v3?密碼
????????$text?=?base64_decode($post['resource']['ciphertext']);
????????$str?=?sodium_crypto_aead_aes256gcm_decrypt($text,$post['resource']['associated_data'],$post['resource']['nonce'],$key);
????????return?json_decode($str,true);
????}

然后就是取到回調(diào)信息后的業(yè)務(wù)處理了

又看到這個文章的朋友, ?如果知道為什么 微信回調(diào)回來的 json信息, ?沒辦法直接使用的, ? 麻煩告告我,謝謝啦, ? 研究一天沒研究出來, ?只能先這樣處理了...

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