调用JSONP数据的最简单方法不适用于移动浏览器

Question

在桌面上工作时，最简单的调用JSONP数据的技术在移动浏览器上不起作用。虽然setTimeout()对CORS来说有点不好，但事实并非如此。

function thumb_handler(data){

    $('.js-itm-hover-img-front[data-id=' + data.id + ']').attr('src', data.img_front).addClass('m');
    $('.js-itm-hover-img-back[data-id=' + data.id + ']').attr('src', data.img_back).addClass('m');

}



$('.prod-img-wrap').each(function(ind) {

    let imgs_scope = {},
        front = $(this).find('.js-itm-hover-img-front'),
        back = $(this).find('.js-itm-hover-img-back'),
        img_front = front.attr('data-img'),
        img_back = back.attr('data-img'),
        id = front.attr('data-id');

    imgs_scope[id] = {
        'img_front': img_front,
        'img_back' : img_back ? img_back : '',
    };


    function requestServerCall() {
        var head = document.head;
        var script = document.createElement('script');

        script.setAttribute('src', 'index.php?route=product/category/product_thumb_work&callback=thumb_handler&id=' + id + '&img_front=' + img_front + '&img_back=' + img_back);
        head.appendChild(script);
        head.removeChild(script);
    }


    // setTimeout(function(){

        requestServerCall();

    // }, ind * 300);


});

服务器端相关方法如下。我的猜测很可能是设置正确的标题。

public function product_thumb_work() {

    $this->load->model('tool/image');
    $this->load->model('catalog/product');

    $json = array();

    if (isset($this->request->get['id'])) {

        // foreach($this->request->get['ids_imgs'] as $id => $imgres) {

            $json['id'] = $this->request->get['id'] ? $this->request->get['id'] : '';


            $img_front = $this->model_tool_image->resize($this->request->get['img_front'], $this->config->get($this->config->get('config_theme') . '_image_product_width'), $this->config->get($this->config->get('config_theme') . '_image_product_height'));

            $json['img_front'] = $img_front ? $img_front : '';

            $img_back = $this->model_tool_image->resize($this->request->get['img_back'], $this->config->get($this->config->get('config_theme') . '_image_product_width'), $this->config->get($this->config->get('config_theme') . '_image_product_height'));

            $json['img_back'] = $img_back ? $img_back : '';


        // }

    }



    // $this->response->setOutput(json_encode($json));

    $callback = $this->request->get['callback'];

    // $message = $this->request->get['message'].' you got a response from server yipeee!!!';

    $jsonResponse = '{"id":"' . $json['id'] . '", "img_front":"' . $json['img_front'] . '", "img_back":"' . $json['img_back'] . '"}';



    // if (isset($this->request->server['HTTP_ORIGIN'])) {

        // $this->response->addHeader('Access-Control-Allow-Origin: ' . $this->request->server['HTTP_ORIGIN']);

        $this->response->addHeader('Access-Control-Allow-Origin: *');

        $this->response->addHeader('Access-Control-Allow-Methods: GET, PUT, POST, DELETE, OPTIONS');

        $this->response->addHeader('Access-Control-Max-Age: 1000');

        $this->response->addHeader('Access-Control-Allow-Headers: Content-Type, Authorization, X-Requested-With');

        $this->response->addHeader('Content-Type: application/javascript');

    // }



    echo $callback . '(' . $jsonResponse . ')';

}

我做错了什么？请帮忙。