• tornado之文件上传的几种形式form,伪ajax(iframe)


    1直接form提交给后台处理

     1 <!DOCTYPE html>
     2 <html lang="en">
     3 <head>
     4     <meta charset="UTF-8">
     5     <title>form-upload</title>
     6 </head>
     7 <body>
      注意form的enctype类型"multipart/form-data"
     8 <form action="/form_upload" method="post" enctype="multipart/form-data">  9 <input type="file" name="file"/> 10 <input type="submit", value="上传"/> 11 </form> 12 </body> 13 </html>

    后台post方法统一处理代码如下:
    class FormRequest_handle(tornado.web.RequestHandler):
        def get(self, *args, **kwargs):
            self.render('iframe_upload.html', status='')
    
        def post(self, *args, **kwargs):
            print('post')
            file_data = self.request.files['file']#读出了的文件是数组里面的是字典形式[{'filename':'xxx','body':'xxxxxxxxxxxxx'}]
            for meta in file_data:
                filename = meta['filename']
                print(filename, file_data)
                with open(os.path.join('static', filename), 'wb') as up:
                    up.write(meta['body'])
            self.write('upload success')
    
    settings = {
        'template_path':'views',
        'static_path':'static',
        # 'xsrf_cookies':True,此处测试csrf跨站伪造请求攻击请忽略
    }
    if __name__ == '__main__':
        application = tornado.web.Application([
            # (r'/index', Indexhandle),
            # (r'/manager', Managerdhandle),
            # (r'/csrf', Csrf_handle),
            # (r'/xml', XmlHttpRequest_handle),
            (r'/iframe',FormRequest_handle),
    
        ], **settings)
    
        application.listen(8089)
        tornado.ioloop.IOLoop.instance().start()
    

      2.伪ajax(iframe) 此方法发送请求不刷新页面,利用iframe 的局部刷新特性,对浏览器兼容性更好

     1 <body>
     2 <form id="myform" action="/iframe" method="post" enctype="multipart/form-data">
     3     <input type="file" name="file"/>
     4     <input type="button" value="上传" onclick="redirect()"/>
     5     <iframe id="myiframe" name="my_iframe"></iframe>
     6 </form>
     7 <script src="{{static_url('jquery-3.2.1.js')}}"></script>
     8 <script>
     9     function redirect() {
    10 //        document.getElementById('myiframe').onload = test;#执行完iframe立即执行test函数
    11         $('#myiframe').onload = test;
    12         document.getElementById('myform').target = 'my_iframe';//此处等于IDmyframe会有不同
    13         document.getElementById('myform').submit();
    14 //        $('#myform').submit();
    15     }
    16    function test() {
    17         var t = $('#myiframe').contents().find('body').text();
    18         console.log(t)
    19    }
    20 </script>
    21 </body>
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  • 原文地址:https://www.cnblogs.com/wangwei916797941/p/6853017.html
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