小程序开发：上传图片到腾讯云

    /qc_cos/config:
        get:
            summary: 腾讯云配置
            description: 腾讯云配置
            tags: [Config]
            operationId: get_qc_cos_config
            parameters:
                - $ref: '#/parameters/AccessToken'
                - $ref: '#/parameters/qcos_path_in_query'
            responses:
                200:
                    schema:
                        $ref: '#/definitions/QCOSConfig'
                default:
                    description: Unexpected error
                    schema:
                        $ref: '#/definitions/Error'
            security:
                - OAuth2: [open]

swagger_py_codegen -s  docs/v1.yml . -p apis -tlp sanic

    from qcloud_cos.cos_auth import Auth
    
    async def get(self, request):
        auth = Auth(appid=Config.QCOS_APPID,
                    secret_id=Config.QCOS_SECRET_ID,
                    secret_key=Config.QCOS_SECRET_KEY)
        expired = time() + 3600 # 签名有效时间 3600 秒
        # 上传到 cos bucket 的目录
        dir_name = request.raw_args.get('cos_path', '/xrzeti')
        # 生成签名
        sign = auth.sign_more(Config.QCOS_BUCKET_NAME,
                              cos_path=dir_name,
                              expired=expired)
        return {"sign": sign}, 200

    uploadToCos: function () {
        var that = this;

        // 选择上传的图片
        wx.chooseImage({
            sizeType: ['original', 'compressed'], // 图片类型 original 原图，compressed 压缩图，默认二者都有
            success: function (res) {

                // 获取文件路径
                var file = res.tempFiles[0];
                console.log(file.size);

                // 获取文件名
                var fileName = file.path.match(/(wxfile:\/\/)(.+)/)
                fileName = fileName[2]

                // 获取到图片临时路径后，指定文件名 上传到cos
                upload(file.path, fileName, that);
            }
        })
    }

cosUrl = "https://" + REGION + ".file.myqcloud.com/files/v2/" + APPID + "/" + BUCKET_NAME + DIR_NAME;

var config = require('../config.js');
// 先确定上传的 URL
var cosUrl = "https://" + config.cos_region + ".file.myqcloud.com/files/v2/" + config.cos_appid + "/" + config.cos_bucket_name + config.cos_dir_name;

//填写自己的鉴权服务器地址
var cosSignatureUrl = config.host + '/v1/qc_cos/config?cos_path=' + config.cos_dir_name;

/**
 * 上传方法
 * filePath: 上传的文件路径
 * fileName： 上传到cos后的文件名
 * that: 小程序所在当前页面的 object
 */
function upload(filePath, fileName, that) {
    var data;

    // 鉴权获取签名
    wx.request({
        url: cosSignatureUrl,
        header: {
            Authorization: 'JWT' + ' ' + that.data.jwt.access_token
        },
        success: function (cosRes) {
            // 获取签名
            var signature = cosRes.data.sign;

            // 头部带上签名，上传文件至COS
            var uploadTask = wx.uploadFile({
                url: cosUrl + '/' + fileName,
                filePath: filePath,
                header: {
                    'Authorization': signature
                },
                name: 'filecontent',
                formData: {
                    op: 'upload'
                },
                success: function (uploadRes) {
                    // 上传成功后的操作
                    var upload_res = JSON.parse(uploadRes.data)
                    var files = that.data.files;
                    files.push(upload_res.data.source_url);
                    that.setData({
                        upload_res: upload_res,
                        files: files,
                        test_image: upload_res.data.source_url
                    })
                },
                fail: function (e) {
                    console.log('e', e)
                }
            });
            // 上传进度条
            uploadTask.onProgressUpdate((res) => {
                that.setData({
                    upload_progress: res.progress
                })
                if (res.progress === 100){
                    that.setData({
                        upload_progress: 0
                    })
                }
            })
        }
    })
    return data
}