GET http://tmp/HPkZrTESINFNa89881c43bc52847acb2c5279da80e66.jpg 500 (Internal Server Error)(env: Windows,mp,1.05.2105170; lib: 2.10.4) 通过chooseimg获取本地图片 wx.getImageInfo({       src: that.data.uploaderList[i].url,       success(res){         console.log(res)         let imgpath = res.path //本地图片路径         let imgwidth = res.width //图片的宽         let imgheight = res.height //图片的高         wx.createSelectorQuery()         .select('#canvas')         .fields({           node: true,         })         .exec(function(res){           const canvas = res[0].node           const ctx = canvas.getContext('2d')            ctx.width = imgwidth           ctx.height = imgheight           let seal = canvas.createImage();          seal.src = imgpath;          seal.onload = () => {          ctx.drawImage(seal,0, 0, imgwidth, imgheight);