Uploading file using python mechanize

Question

I am on a windows 10 laptop. When i manually open submit.html on my local computer click and browse to ~~namo.jpg~~ namo.png and then submit, i get the website processing my image and return with result file within 15 seconds. But I can't seem to get it to do the same using Python mechanize, when it run the script, the mechanize_results.html file keeps returning too quickly and telling me in their page that "Uploaded file is not a valid image. Only JPG, PNG and GIF files are allowed.. " Not sure what i have to change to get the site to recognize my file submitted by my python mechanize script as an image file.

my submit.html file has this

 <form name="myform" id="myform" action="http://deepdreamgenerator.com/upload-im" enctype="multipart/form-data" method="POST" id="upload-form">
    <input type="hidden" name="_token" value="pfC1a6HGVdbWO7mCmKVkqVinCkSYOKkQxXZV9NY1">
    <input type="file" name="file" id="upload"/>
    <input type="submit" />
</form>

my python mechanize script has this import mechanize

filename = 'C:/Users/tintran/Desktop/namo.png'
url = "file:///C:/Users/tintran/Desktop/submit.html"
br = mechanize.Browser()
br.set_handle_robots(False) # ignore robots
br.open(url)
br.select_form('myform')
br.set_all_readonly(False)
br.form.add_file(open(filename,'r'))
res = br.submit()
content = res.read()
with open("mechanize_results.html", "w") as f:
    f.write(content)

y0prst · Accepted Answer · 2015-09-12 15:32:02Z

1

https://docs.python.org/2/library/functions.html#open

If mode is omitted, it defaults to 'r'. The default is to use text mode, which may convert '\n' characters to a platform-specific representation on writing and back on reading. Thus, when opening a binary file, you should append 'b' to the mode value to open the file in binary mode, which will improve portability. (Appending 'b' is useful even on systems that don’t treat binary and text files differently, where it serves as documentation.) See below for more possible values of mode.

It's all about Windows here. So just use 'rb' for opening PNG file.

answered Sep 12, 2015 at 15:32

y0prst

8501 gold badge9 silver badges15 bronze badges

Sign up to request clarification or add additional context in comments.

5 Comments

Tin Tran Over a year ago

I just tried this and it still doesn't work, same error "Uploaded file is not a valid image. Only JPG, PNG and GIF files are allowed.. "

y0prst Over a year ago

Are you sure you upload the same file manually and from python? You wrote that you upload namo.jpg manually. But in the code namo.png is used.

Tin Tran Over a year ago

whoops typo...i don't even have a file called namo.jpg..sorry i'll edit the question right now.

Tin Tran Over a year ago

last night, i had this br.form.add_file(open(filename),'images/png',filename,name='file') and it didn't work...

Tin Tran Over a year ago

but just now i solved it using your 'rb' suggestion ...it work with br.form.add_file(open(filename,'rb'),'images/png',filename,name='file')

Collectives™ on Stack Overflow

Uploading file using python mechanize

1 Answer 1

5 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

5 Comments

Your Answer

Sign up or log in

Post as a guest

Related