python-http-client.py

# HTTP REQUEST
def http_request(url, method=None, post_data=None, headers=None):
    '''
    Args:
        url:       HTTP URL
        method:    GET/POST/..
        post_data: <dict>
        headers:   <dict>

    Returns: <dict> or None
    '''

    def check_format(name, value):
        if value and not isinstance(value, dict):
            raise Exception('{} should be dict!'.format(name))

    check_format('post_data', post_data)
    check_format('headers', headers)

    try:
        if post_data:
            request = urllib2.Request(url, json.dumps(post_data))
        else:
            request = urllib2.Request(url)
        if headers:
            for key in headers:
                request.add_header(key, headers[key])
        if method:
            request.get_method = lambda: method
        else:
            method = request.get_method()

        print('request http {}, url = {}, data = {}'.format(method.upper(), url, post_data))
        response = urllib2.urlopen(request)
        content = response.read()
        if content and (content.startswith('{') or content.startswith('[')):
            return json.loads(content)
        return content

    except Exception as e:
        print('request error, e = {}'.format(str(e)))
        traceback.print_exc()
    return None