forked from Ponysearch/Ponysearch
100 lines
3 KiB
Python
100 lines
3 KiB
Python
from lxml import html
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from urllib import urlencode, unquote
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from urlparse import urlparse, urljoin
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from cgi import escape
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from lxml.etree import _ElementStringResult
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search_url = None
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url_xpath = None
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content_xpath = None
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title_xpath = None
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suggestion_xpath = ''
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results_xpath = ''
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'''
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if xpath_results is list, extract the text from each result and concat the list
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if xpath_results is a xml element, extract all the text node from it ( text_content() method from lxml )
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if xpath_results is a string element, then it's already done
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'''
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def extract_text(xpath_results):
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if type(xpath_results) == list:
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# it's list of result : concat everything using recursive call
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if not len(xpath_results):
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raise Exception('Empty url resultset')
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result = ''
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for e in xpath_results:
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result = result + extract_text(e)
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return result
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elif type(xpath_results) == _ElementStringResult:
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# it's a string
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return ''.join(xpath_results)
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else:
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# it's a element
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return xpath_results.text_content()
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def extract_url(xpath_results):
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url = extract_text(xpath_results)
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if url.startswith('//'):
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# add http or https to this kind of url //example.com/
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parsed_search_url = urlparse(search_url)
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url = parsed_search_url.scheme+url
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elif url.startswith('/'):
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# fix relative url to the search engine
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url = urljoin(search_url, url)
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# normalize url
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url = normalize_url(url)
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return url
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def normalize_url(url):
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parsed_url = urlparse(url)
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# add a / at this end of the url if there is no path
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if not parsed_url.netloc:
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raise Exception('Cannot parse url')
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if not parsed_url.path:
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url += '/'
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# FIXME : hack for yahoo
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if parsed_url.hostname == 'search.yahoo.com' and parsed_url.path.startswith('/r'):
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p = parsed_url.path
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mark = p.find('/**')
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if mark != -1:
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return unquote(p[mark+3:]).decode('utf-8')
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return url
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def request(query, params):
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query = urlencode({'q': query})[2:]
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params['url'] = search_url.format(query=query)
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params['query'] = query
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return params
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def response(resp):
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results = []
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dom = html.fromstring(resp.text)
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if results_xpath:
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for result in dom.xpath(results_xpath):
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url = extract_url(result.xpath(url_xpath))
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title = extract_text(result.xpath(title_xpath)[0 ])
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content = extract_text(result.xpath(content_xpath)[0])
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results.append({'url': url, 'title': title, 'content': content})
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else:
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for url, title, content in zip(
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map(extract_url, dom.xpath(url_xpath)), \
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map(extract_text, dom.xpath(title_xpath)), \
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map(extract_text, dom.xpath(content_xpath)), \
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):
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results.append({'url': url, 'title': title, 'content': content})
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if not suggestion_xpath:
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return results
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for suggestion in dom.xpath(suggestion_xpath):
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results.append({'suggestion': extract_text(suggestion)})
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return results
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