关于下载（前后端）第1部分

1.前端点击下载

<a href="/static/images/myimg.jpg" download="picture">下载图片</a>

其中download属性值是下载的文件名

 

2.后端输出图片

@app.route('/download/')
def down():
        path = app.root_path+'/static/images/myimg.jpg'
        file = open(path, 'rb') # caution: mode default 'rt'
        content = file.read()
　　　　　file.close()
        return content,{'Content-Type':'image/jpeg'}

 

3.后端文件下载

@app.route('/download/')
def down():
        path = app.root_path+'/static/images/myimg.jpg'
        file = open(path, 'rb') # caution: mode default 'rt'
        content = file.read()
        file.close()
        size = os.path.getsize(path)
        filename = os.path.basename(path)
        return content,{
                        'Content-type':'application/octet-stream',
                        'Accept-Ranges':'bytes',
                        'Accept-Length':size,
                        'Content-Disposition':'attachment;filename='+filename}