微信jssdk图片上传

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一、html页面如下：

二、引入js文件

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=$nonceStr&timestamp=$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 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;
}