Image upload using CGI Python - Doesn’t work!

Question

Hello, I created an html file with one and I intend to select an image from a directory and after clicking on Ubmit this image should be saved in another directory. Some help?

That’s what I’ve tried so far...

index.html

<form name="pyform" method="POST" action="upload.py"> 
   <input type="file" name="image" /><br />
   <input type="submit" name="submit" value="Submit" />
</form>

upload.py

#!c:/Python34/python
# -*- coding: UTF-8 -*-
print("Content-Type: text/html")
print()

import cgi,cgitb
cgitb.enable()

form = cgi.FieldStorage()
file = form['image'].value

upload_dir = 'C:/wamp/www/upload/' # esse é o diretório onde vou salvar a imagem

f = open(upload_dir + file, 'w')
f.write(file)
f.close()

I noticed that after executing the code, a file with the same name as the image is created, however, with size 0kb and cannot be displayed.

Answer 1

You must open, read and write the file in binary mode this way:

f = open(file, mode = 'rb') #'rb' para ler arquivos binários 
f2 = open(upload_dir + file, 'wb')  #'wb' para gravar arquivos binários
f2.write(f.read())

Or you can do it like this:

with open(file, mode='rb') as f:
    with open(upload_dir+file, mode='wb') as f2:
        f2.write(f.read())

so resources are automatically closed.

Answer 2

Well, I think your problem is simpler to solve.

Your form must contain the attribute enctype="multipart/form-data".

I guess you forgot.