BBS论坛（二十二）

22.1.七牛js上传轮播图图片

（1）common/zlqiniu.js

'use strict';

var zlqiniu = {
    'setup': function (args) {
        var domain = args['domain'];
        var params = {
            browse_button: args['browse_btn'],
            runtimes: 'html5,flask,html4',
            max_file_size: '500mb',
            dragdrop: false,
            chunk_size: '4mb',
            uptoken_url: args['uptoken_url'],
            domain: domain,
            get_new_uptoken: false,
            auto_start: true,
            unique_names: true,
            multi_selection: false,
            filters: {
                mime_types: [
                    {title: 'Image files', extensions: 'jpg,gif,png'},
                    {title: 'Video files', extensions: 'flv,mpg,mpeg,avi,wmv,mov,asf,rm,rmvb,mp4,mkv,m4v'}
                ]
            },
            log_level: 5,
            init: {
                'FileUploaded': function (up, file, info) {
                    if (args['success']) {
                        var success = args['success'];
                        file.name = domain + file.target_name;
                        success(up, file, info);
                    }
                },
                'Error': function (up, err, errTip) {
                    if (args['error']) {
                        var error = args['errors'];
                        error(up, err, errTip);
                    }
                },
                'UploadProgress': function (up, file) {
                    if (args['progress']) {
                        args['progress'](up, file);
                    }
                },
                'FilesAdded': function (up, files) {
                    if (args['fileadded']) {
                        args['fileadded'](up, files);
                    }
                },
                'UploadComplete': function () {
                    if (args['complete']) {
                        args['complete']();
                    }
                }
            }
        };
        for (var key in args) {
            params[key] = args[key];
        }
        var uploader = Qiniu.uploader(params);
        return uploader;
    }
};

（2）common/views.py

首先安装：pip install qiniu

@bp.route('/uptoken/')
def uptoken():
    #七牛的key
    access_key = 'dsdvOjkbwerrraXH4Eh7xhJTxh5q7Y3uZ'
    secret_key = 'nchG9ccJ_ergeaggmeOdBZXasvscaizanfs'
    q = qiniu.Auth(access_key,secret_key)
    #七牛存储空间名字
    bucket = 'zhangderek'
    token = q.upload_token(bucket)
    #字典的key必须是'uptoken'
    return jsonify({'uptoken':token})

（3）cms_banners.html

    <script src="https://cdn.staticfile.org/Plupload/2.1.1/moxie.js"></script>
    <script src="https://cdn.staticfile.org/Plupload/2.1.1/plupload.dev.js"></script>
    <script src="https://cdn.staticfile.org/qiniu-js-sdk/1.0.14-beta/qiniu.js"></script>

    <script src="{{ static('common/zlqiniu.js') }}"></script>
    <script src="{{ static('cms/js/banners.js') }}"></script>

（4）cms_banners.html

 <div class="form-group">
                            <label class="col-sm-2 control-label">图片</label>
                            <div class="col-sm-7">
                                <input type="text" class="form-control" name="img_url" placeholder="轮播图图片">
                            </div>
                            <button class="col-sm-2 btn btn-info" id="upload-btn">添加图片</button>
                        </div>

（5）cms/js/banners.js

$(function () {
    zlqiniu.setup({
        'domain': 'http://p96dsgm7r.bkt.clouddn.com/',
        //上传图片的按钮
        'browse_btn': 'upload-btn',
        //提交的url
        'uptoken_url': '/c/uptoken/',
        'success': function (up, file, info) {
            //上传成功后，显示图片的url
            var imageInput = $("input[name='img_url']");
            imageInput.val(file.name);
        }
    });
});

现在点击“添加图片”，上传成功后，在图片的input框里面会显示图片的地址,并且图片存到你的七牛空间里面。

22.2.首页动态获取轮播图

（1）front/views.py

@bp.route('/')
def index():
    banners = BannerModel.query.order_by(BannerModel.priority.desc()).limit(4)
    context = {
        'banners':banners
    }
    return render_template('front/front_index.html',**context)

（2）front/index.html

 <!-- 轮播图-->
            <div class="carousel-inner" role="listbox">
                {% for banner in banners %}
                    {% if loop.first %}
                        <div class="item active">
                    {% else %}
                        <div class="item ">
                    {% endif %}
                        <a href="{{ banner.link_url }}">
                            <img src="{{ banner.img_url }}" alt="">
                        </a>
                        </div>
                {% endfor %}
            </div>