CODEWITHSUNDEEP
python-3.xtornado
Mushfiqur Rahman
Mushfiqur Rahman

Reputation: 306

Python Tornado file upload gives KeyError

I'm trying to write a very simple python script based on tornado web server to upload a file. But I'm getting 'KeyError' though the key is in the html form is OK.

Here is the python code just to see the uploaded file name.

import tornado.ioloop
import tornado.web

class IndexHandler(tornado.web.RequestHandler):
    def get(self):
        self.write("Bismillahir Rahmanir Raheem")
        self.render('form.html')

class UploadHandler(tornado.web.RequestHandler):
    def post(self):
        self.write("Alhamdulillah, here")
        if  self.request.files is not None:
            self.write("Inside the if")
            uploadFile = self.request.files['my_file'][0]
            self.write(uploadFile['filename'])

def make_app():
    return tornado.web.Application([
      (r"/", IndexHandler),
      (r"/upload", UploadHandler)
    ])

if __name__ == "__main__":
    app = make_app()
    app.listen(8888)
    tornado.ioloop.IOLoop.current().start()

And the html form is as below:

<html>
    <head>
        <title>Testing file upload</title>
    </head>
    <body>
        <h1>Testing file upload</h1>
        <form enctype="multipart/formdata" method="post" action="/upload">
            <input type="file" name="my_file"/>
            <input type="Submit" name="upload" value="Upload"/>
        </form>
    </body>
</html>

But each time I select a file and press Upload button I get the

500: Internal Server Error

And at the PyCharm editor I get the following error: File "C:/Users/Mushfique/Desktop/file-upload/upload.py", line 14, in post uploadFile = self.request.files['my_file'][0]

KeyError: 'my_file' ERROR:tornado.access:500 POST /upload (::1) 1.00ms

Though in the html form I've used 'my_file' as the file input field name.

Upvotes: 0

Views: 776

Answers (1)

xyres
xyres

Reputation: 21779

You've a typo there:

<form enctype="multipart/formdata" ...>
                         ^^^^ this is a typo

It should be multipart/form-data (note the hyphen).

Upvotes: 1

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