from lxml import html
from urllib import urlencode
from cgi import escape

base_url = 'http://www.bing.com/'
search_string = 'search?{query}'

def request(query, params):
    search_path = search_string.format(query=urlencode({'q': query}))
    #if params['category'] == 'images':
    #    params['url'] = base_url + 'images/' + search_path
    params['url'] = base_url + search_path
    return params


def response(resp):
    global base_url
    results = []
    dom = html.fromstring(resp.content)
    for result in dom.xpath('//div[@class="sa_cc"]'):
        link = result.xpath('.//h3/a')[0]
        url = link.attrib.get('href')
        title = ' '.join(link.xpath('.//text()'))
        content = escape(' '.join(result.xpath('.//p//text()')))
        results.append({'url': url, 'title': title, 'content': content})
    return results