subprocess popen + curl + binary data

The following statement works as expected:

os.system("curl --data-binary \@"+input_file_path+" -o "+ file_name +" localhost:30")

But when 开发者_如何学Gotrying it with subprocess.popen:

Popen(['curl','--data-binary','\@'+input_file_path, '-o', file_name,'localhost:30'], stdout=PIPE).communicate()[0]

Curl seems to hang up(logs into endless loop), like if the input file is not passed to it(which is mandatory for localhost:30 to function properly)...

Any ideas?

how about using a library instead of calling system's curl?

You could try using the original string in subprocess.Popen with the additional keyword argument to Popen of shell=True:

subprocess.Popen("curl --data-binary \@"+input_file_path+" -o "+ file_name +" localhost:30",
    stdout=subprocess.PIPE,
    shell=True)

How about using requests library

Python POST binary data

Or yet another

Check out this link for binary (image file) case How to download image using requests