def test_urlutils():
'''Test URL manipulation tools'''
# domain extraction
assert extract_domain('h') is None
assert extract_domain('https://httpbin.org/') == 'httpbin.org'
# url parsing
result = _parse('https://httpbin.org/')
assert isinstance(result, ParseResult)
newresult = _parse(result)
assert isinstance(result, ParseResult)
with pytest.raises(TypeError):
result = _parse(float(1.23))
assert get_base_url('https://example.org/path') == 'https://example.org'
with pytest.raises(ValueError):
assert get_host_and_path('123') is None
assert get_host_and_path('https://example.org/path') == (
'https://example.org', '/path')
assert get_host_and_path('https://example.org/') == ('https://example.org',
'/')
assert get_host_and_path('https://example.org') == ('https://example.org',
'/')
assert get_hostinfo('https://httpbin.org/') == ('httpbin.org',
'https://httpbin.org')
assert get_hostinfo('https://example.org/path') == ('example.org',
'https://example.org')
# keeping track of known URLs
known_links = {'https://test.org'}
assert is_known_link('https://test.org/1', known_links) is False
assert is_known_link('https://test.org', known_links) is True
assert is_known_link('http://test.org', known_links) is True
assert is_known_link('http://test.org/', known_links) is True
assert is_known_link('https://test.org/', known_links) is True
def test_urlutils():
'''Test URL manipulation tools'''
assert extract_domain('https://httpbin.org/') == 'httpbin.org'
assert get_base_url('https://example.org/path') == 'https://example.org'
assert get_host_and_path('https://example.org/path') == ('https://example.org', '/path')
assert get_hostinfo('https://example.org/path') == ('example.org', 'https://example.org')
assert get_hostinfo('https://httpbin.org/') == ('httpbin.org', 'https://httpbin.org')
def store_todo_links(todo, new_links, shortform=False):
"""Store the retrieved internal links in todo-list while prioritizing
the navigation ones."""
# add links to deque
if todo is None:
todo = deque()
# prioritize navigation links
# use most short links if there are no navlinks?
for link in new_links:
if shortform is True:
link = get_host_and_path(link)[1]
if is_navigation_page(link):
todo.appendleft(link)
else:
todo.append(link)
# unique list while preserving order
return deque(OrderedDict.fromkeys(todo))
def add_to_compressed_dict(inputlist,
blacklist=None,
url_filter=None,
inputdict=None):
'''Filter, convert input URLs and add them to domain-aware processing dictionary'''
# init
if inputdict is None:
inputdict = defaultdict(deque)
# deduplicate while keeping order
inputlist = list(OrderedDict.fromkeys(inputlist))
# filter
if blacklist:
inputlist = [
u for u in inputlist
if re.sub(r'https?://', '', u) not in blacklist
]
if url_filter:
filtered_list = []
while inputlist:
u = inputlist.pop()
for f in url_filter:
if f in u:
filtered_list.append(u)
break
inputlist = filtered_list
# validate and store in dict
for url in inputlist:
# validate URL
if validate_url(url)[0] is False:
continue
# segment URL and add to domain dictionary
try:
hostinfo, urlpath = get_host_and_path(url)
inputdict[hostinfo].append(urlpath)
except ValueError:
LOGGER.warning('Could not parse URL, discarding: %s', url)
return inputdict
def cli_crawler(args, n=30, domain_dict=None):
'''Start a focused crawler which downloads a fixed number of URLs within a website
and prints the links found in the process'''
config = use_config(filename=args.config_file)
sleep_time = config.getfloat('DEFAULT', 'SLEEP_TIME')
counter, crawlinfo, backoff_dict = None, {}, {}
# load input URLs
if domain_dict is None:
domain_dict = load_input_dict(args)
# load crawl data
for website in domain_dict:
homepage = website + domain_dict[website].popleft()
crawlinfo[website] = {}
domain_dict[website], crawlinfo[website]['known'], crawlinfo[website][
'base'], crawlinfo[website]['count'], crawlinfo[website][
'rules'] = init_crawl(homepage,
None,
set(),
language=args.target_language,
shortform=True)
# update info
# TODO: register changes?
# if base_url != website:
# ...
# iterate until the threshold is reached
while domain_dict:
bufferlist, download_threads, domain_dict, backoff_dict = load_download_buffer(
domain_dict, backoff_dict, sleep_time, threads=args.parallel)
# start several threads
for url, result in buffered_downloads(bufferlist,
download_threads,
decode=False):
website, _ = get_host_and_path(url)
crawlinfo[website]['count'] += 1
# handle result
if result is not None and result != '':
domain_dict[website], crawlinfo[website][
'known'], htmlstring = process_response(
result,
domain_dict[website],
crawlinfo[website]['known'],
crawlinfo[website]['base'],
args.target_language,
shortform=True,
rules=crawlinfo[website]['rules'])
# only store content pages, not navigation
if not is_navigation_page(url): # + response.geturl()
if args.list:
write_result(url, args)
else:
counter = process_result(htmlstring, args, url,
counter, config)
# just in case a crawl delay is specified in robots.txt
sleep(get_crawl_delay(crawlinfo[website]['rules']))
#else:
# LOGGER.debug('No result for URL: %s', url)
# if args.archived is True:
# errors.append(url)
# early exit if maximum count is reached
if any(i >= n for i in
[dictvalue['count'] for _, dictvalue in crawlinfo.items()]):
break
# print results
for website in sorted(domain_dict):
for urlpath in sorted(domain_dict[website]):
sys.stdout.write(website + urlpath + '\n')
