Question

我正在使用multipart / form / data上传一个xml文件，需要读取xml文件内容并在response.write（）中打印xml文件内容

MAIN_PAGE_HTML = """\
<html>
  <body>
    <form action="/f1" method="post" enctype="multipart/form-data">
      <div><input type="file" name="filecoll"></div>
      <div><input type="submit" value="Submit "></div>
    </form>
  </body>
</html>
"""

class MainPage(webapp2.RequestHandler):

    def get(self):
         self.response.write(MAIN_PAGE_HTML)
class formfiless(webapp2.RequestHandler):

    def post(self):

        self.response.write('<html><body>You wrote:<pre>')
        self.response.write(cgi.escape(self.request.get('filecoll')))

        f=self.request.get('filecoll')
        data=f.read()


        self.response.write('</pre></body></html>')



application = webapp2.WSGIApplication([
    ('/',MainPage),
    ('/f1',formfiless),
], debug=True)

当我尝试读取表单文件时发生以下错误。

Traceback (most recent call last):
  File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 1535, in __call__
    rv = self.handle_exception(request, response, e)
  File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 1529, in __call__
    rv = self.router.dispatch(request, response)
  File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 1278, in default_dispatcher
    return route.handler_adapter(request, response)
  File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 1102, in __call__
    return handler.dispatch()
  File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 572, in dispatch
    return self.handle_exception(e, self.app.debug)
  File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 570, in dispatch
    return method(*args, **kwargs)
  File "C:\Users\uniphoreC08\Desktop\upload_grammar\helloworld.py", line 35, in post
    f.read()
AttributeError: 'unicode' object has no attribute 'read'

Answer 1

电话

self.request.get('filecoll')

似乎产生了一个unicode字符串，而不是一个文件对象。在下一行中，您将调用read（）方法，就好像它是一个文件对象一样。因此

AttributeError：＆＃39; unicode＆＃39;对象没有属性＆＃39;读＆＃39;

Answer 2

以下是将xml文件作为字符串写入网络的示例代码。

  class MPost(webapp2.RequestHandler):
    def post(self):
     uploaded_file  = self.request.body
     self.response.headers['Content-Type'] = 'text/plain'
     self.response.write(str(uploaded_file))

而不是请求争论，使用请求体和body_file：body是主体内容作为字节字符串，body_file为相同的数据提供类似文件的接口：

在webapp2 -google appengine中读取表单文件

2 个答案: