HTTP POST binary files using Python: concise non-pycurl examples?

Question

I\'m interested in writing a short python script which uploads a short binary file (.wav/.raw audio) via a POST request to a remote server.

I\'ve done this with pycurl,

Answer 1

I met similar issue today, after tried both and pycurl and multipart/form-data, I decide to read python httplib/urllib2 source code to find out, I did get one comparably good solution:

1. set Content-Length header(of the file) before doing post
2. pass a opened file when doing post

Here is the code:

import urllib2, os
image_path = "png\\01.png"
url = 'http://xx.oo.com/webserviceapi/postfile/'
length = os.path.getsize(image_path)
png_data = open(image_path, "rb")
request = urllib2.Request(url, data=png_data)
request.add_header('Cache-Control', 'no-cache')
request.add_header('Content-Length', '%d' % length)
request.add_header('Content-Type', 'image/png')
res = urllib2.urlopen(request).read().strip()
return res

see my blog post: http://www.2maomao.com/blog/python-http-post-a-binary-file-using-urllib2/