还是一贯风格:用代码说话!!!
<?php
class ShareModel extends BaseModel
{
var $appId = APPID;
var $appSecret = APPSECRET;
public function getJsApiTicket()
{
$ticket_file = \'/dev/shm/jsapi_ticket.json\';
$data = json_decode(file_get_contents($ticket_file));
if ($data->expire_time < time()) {
$accessToken = $this->getApiAccessToken();
$url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";
$res = json_decode($this->http_request($url));
$ticket = $res->ticket;
if ($ticket) {
$data->expire_time = time() + 7000;
$data->jsapi_ticket = $ticket;
file_put_contents($ticket_file, json_encode($data));
}
} else {
$ticket = $data->jsapi_ticket;
}
return $ticket;
}
/*微信公众号,不需要获取用户信息:所以不需要授权,即使用appid、appsecret和grant_type换取access_token*/
/*
微信对于access_token的请求存在日请求数的限制 所以要全局缓存access_token,在过期时间内直接使用存的值;
这里使用file_put_contents()代替fwrite()、fopen()、fclose();
file_put_content()如果文件不存在就先创建文件这里要注意把缓存文件放/dev/shm/*下面,这个磁盘文件会在重启的时候清空数据,
由于这个access_token丢失也不会存在问题,所以存在这里有助于减轻磁盘内存压力
*/
private function getApiAccessToken()
{
$token_file = \'/dev/shm/access_token.json\';
$data = json_decode(file_get_contents($token_file));
if ($data->expire_time < time()) {
$url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$this->appId&secret=$this->appSecret";
$res = json_decode($this->http_request($url));
$access_token = $res->access_token;
if ($access_token) {
$data->expire_time = time() + 7000;
$data->access_token = $access_token;
file_put_contents($token_file, json_encode($data));
}
} else {
$access_token = $data->access_token;
}
return $access_token;
}
//HTTP请求(支持HTTP/HTTPS,支持GET/POST)
private function http_request($url, $data = null)
{
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
if (!empty($data)) {
curl_setopt($curl, CURLOPT_POST, TRUE);
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
}
curl_setopt($curl, CURLOPT_RETURNTRANSFER, TRUE);
$output = curl_exec($curl);
curl_close($curl);
file_put_contents(\'/tmp/weixin.\' . date("Ymd") . \'.log\', date("Y-m-d H:i:s") . "\t" . $output . "\n", FILE_APPEND); //记录微信请求的相关日志,以用于排插错误
return $output;
}
|调用方式:
接收前端传过来的当前请求页的url
public function getApiTicketAction()
{
$model = new ShareModel();
$jsapiTicket = $model->getJsApiTicket();
$url = $this->_req->getQuery(\'url\',"");
if(!$url){
response::err_lack_param(); //做一个参数检测的判断
}
$timestamp = time();
$nonceStr = $this->createNonceStr(); //构造一个随机数,用来生成签名的一部分
$string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr×tamp=$timestamp&url=$url"; //签名算法先按照ascII码排序
$signature = sha1($string); //对排序好的字符串加密
$signPackage = array(
"appId" => $model->appId,
"nonceStr" => $nonceStr,
"timestamp" => $timestamp,
"signature" => $signature,
);
response::result($signPackage); //返回数据给前端
}
private function createNonceStr($length = 16) { //生成随机16个字符的字符串
$chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
$str = "";
for ($i = 0; $i < $length; $i++) {
$str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
}
return $str;
}
由于自己的无知,一开始使用fwrite()来写文件,而线上服务器又严格限制代码写文件,导致全局缓存access_token 无效,
进而所有用户的转发请求都直接跑去请求微信端的接口 随着访问数的增加,最后请求数超过了微信的日限制最大值,最后导致接口被限制一天不能使用。
这个要注意:做缓存的文件存放的服务器磁盘是否有读写权限。