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);