微信jssdk图片上传
一、html页面如下：
<div class="weui-cell"> <div class="weui-cell__hd"></div> <div class="weui-cell__bd"> <div class="weui-uploader"> <div class="weui-uploader__hd"> <p class="weui-uploader__title" style="color: #3d4145;">图片上传</p> <div class="weui-uploader__info"><span id="already_upload">0</span>/9</div> </div> <div class="weui-uploader__bd" style="overflow: inherit"> <ul class="weui-uploader__files" id="uploaderFiles"> </ul> <div class="weui-uploader__input-box"> <span id="uploaderInput" class="weui-uploader__input"></span> </div> </div> </div> </div> </div>
二、引入js文件
<script src="https://res2.wx.qq.com/open/js/jweixin-1.4.0.js"></script>
三、获取jssdk参数
class JSSDK { private $appId; private $appSecret; public function __construct($appId, $appSecret) { $this->appId = $appId; $this->appSecret = $appSecret; } public function getSignPackage() { $jsapiTicket = $this->getJsApiTicket(); // 注意 URL 一定要动态获取，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(); // 这里参数的顺序要按照 key 值 ASCII 码升序排序 $string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr×tamp=$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 应该全局存储与更新，以下代码以写入到文件中做示例 $data = json_decode($this->get_php_file("jsapi_ticket.php")); if ($data->expire_time < time()) { $accessToken = $this->getAccessToken(); echo "access_token=" . $accessToken; // 如果是企业号用以下 URL 获取 ticket //$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; $this->set_php_file("jsapi_ticket.php", json_encode($data)); } } 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 $data = json_decode($this->get_php_file("access_token.php")); 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($url)); //var_dump($this->appId); $access_token = $res->access_token; if ($access_token) { $data->expire_time = time() + 7000; $data->access_token = $access_token; $this->set_php_file("access_token.php", json_encode($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($curl, CURLOPT_TIMEOUT, 500); // 为保证第三方服务器与微信服务器之间数据传输的安全性，所有微信接口采用https方式调用，必须使用下面2行代码打开ssl安全校验。 // 如果在部署过程中代码在此处验证失败，请到 http://curl.haxx.se/ca/cacert.pem 下载新的证书判别文件。 curl_setopt($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 trim(substr(@file_get_contents($_SERVER['DOCUMENT_ROOT'] . '/customers/' . $filename), 15)); } private function set_php_file($filename, $content) { $fp = @fopen($_SERVER['DOCUMENT_ROOT'] . '/customers/' . $filename, "w+"); fwrite($fp, "<?php exit();?>" . $content); fclose($fp); }
四、配置js
wx.config({ debug: false, appId: '<?php echo $signPackage["appId"];?>', timestamp: <?php echo $signPackage["timestamp"];?>, nonceStr: '<?php echo $signPackage["nonceStr"];?>', signature: '<?php echo $signPackage["signature"];?>', jsApiList: [ "chooseImage", "uploadImage", "downloadImage", "previewImage" ] }); wx.ready(function () { // 1 判断当前版本是否支持指定 JS 接口，支持批量判断 wx.checkJsApi({ jsApiList: [ 'chooseImage', 'previewImage', 'uploadImage', 'downloadImage' ], success: function (res) { //alert(JSON.stringify(res)); if (res.checkResult.getLocation == false) { alert('你的微信版本太低，不支持微信JS接口，请升级到最新的微信版本！'); return; } else { $("#uploaderInput").click(function () { wxChooseImage(); }) } }, error: function (res) { alert(JSON.stringify("error=" + res)); } }); }); //上传图片 function wxChooseImage() { wx.chooseImage({ success: function (res) { var i = 0, length = res.localIds.length; function upload() { //判断是否已经上传了足够的图片 var len = $(".file-item").length; if (len >= 9) { alert("上传图片数量已达上限"); return; } //图片上传到微信服务器 wx.uploadImage({ localId: res.localIds[i], success: function (result) { // alert(JSON.stringify(result)); var imgList = '<li class="weui-uploader__file file-item" style="position: relative;">' + '<img src="' + res.localIds[i] + '" style="width:79px;height:79px;" />' + '<span class="del" onclick="delImg(this)">×</span>' + '<input type="hidden" name="serviceIds[]" value="' + result.serverId + '_1"/>' + '</li>'; $("#uploaderFiles").append(imgList); $("#already_upload").html($(".file-item").length); i++; if (i < length) { upload(); } }, fail: function (res) { alert(JSON.stringify(res)); } }); } upload(); } }); } wx.error(function (res) { alert("调用微信jsapi返回的状态:" + res.errMsg); });
//删除图片 function delImg(dom) { $(dom).parent().remove(); $("#already_upload").html($(".file-item").length); }
五、将微信服务器上临时图片保存到本地服务器
/** * @Description: 获取图片内容 * @Author: Yang * @param $media_id * @return string */ public function getWxImage($media_id) { $access_token = $this->getAccessToken(); $user = $this->session->userdata('user'); $url = "https://api.weixin.qq.com/cgi-bin/media/get?access_token=" . $access_token . "&media_id=" . $media_id; $content = $this->http_get_data($url); //创建文件夹 $targetfolder = $this->mkdirByUser($user["uid"]); $dir = dirname(parse_url(site_url())['path']); $user_path = $_SERVER['DOCUMENT_ROOT'] . $dir . $targetfolder; $time = time() . rand(10, 99) . '.jpg';//文件名 $filePath = $user_path . $time;//本地图像绝对路径 $targetName = $targetfolder . $time; file_put_contents($filePath, $content); return $targetName; }
/** * @Description: 获取微信服务器上的图片 * @Author: Yang * @param $url * @return string */ private function http_get_data($url) { $ch = curl_init(); curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'GET'); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); curl_setopt($ch, CURLOPT_URL, $url); ob_start(); curl_exec($ch); $return_content = ob_get_contents(); ob_end_clean(); return $return_content; }
