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"""
Module for processing Sitemaps.
Note: The main purpose of this module is to provide support for the
SitemapSpider, its API is subject to change without notice.
"""
import lxml.etree
class Sitemap(object):
"""Class to parse Sitemap (type=urlset) and Sitemap Index
(type=sitemapindex) files"""
def __init__(self, xmltext):
xmlp = lxml.etree.XMLParser(recover=True, remove_comments=True, resolve_entities=False)
self._root = lxml.etree.fromstring(xmltext, parser=xmlp)
rt = self._root.tag
self.type = self._root.tag.split('}', 1)[1] if '}' in rt else rt
def __iter__(self):
for elem in self._root.getchildren():
d = {}
for el in elem.getchildren():
tag = el.tag
name = tag.split('}', 1)[1] if '}' in tag else tag
if name == 'link':
if 'href' in el.attrib:
d.setdefault('alternate', []).append(el.get('href'))
else:
d[name] = el.text.strip() if el.text else ''
if 'loc' in d:
yield d
def sitemap_urls_from_robots(robots_text):
"""Return an iterator over all sitemap urls contained in the given
robots.txt file
"""
for line in robots_text.splitlines():
if line.lstrip().startswith('Sitemap:'):
yield line.split(':', 1)[1].strip()
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