https://developers.weixin.qq.com/miniprogram/dev/OpenApiDoc/qrcode-link/short-link/generateShortLink.html

请求数据示例 中的   "page_url": "/pages/publishHomework/publishHomework?query1=q1", 应该去掉首个斜杠，即应该是   "page_url": "pages/publishHomework/publishHomework?query1=q1",否则会返回40066	invalid url