Sort scraper modules (mostly for test stability).
This commit is contained in:
Tobias Gruetzmacher
parent
36cc4e32f4
commit
78e13962f9
1 changed files with 54 additions and 28 deletions
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@ -1,6 +1,8 @@
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# -*- coding: iso-8859-1 -*-
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# -*- coding: utf-8 -*-
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# Copyright (C) 2004-2005 Tristan Seligmann and Jonathan Jacobs
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# Copyright (C) 2012-2014 Bastian Kleineidam
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# Copyright (C) 2014-2016 Tobias Gruetzmacher
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import requests
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import time
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import random
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@ -27,21 +29,24 @@ try:
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except ImportError:
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pycountry = None
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from . import loader, configuration, util, languages
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from . import loader, configuration, languages
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from .util import (getPageContent, makeSequence, get_system_uid, urlopen,
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getDirname, unescape, tagre, normaliseURL, prettyMatcherList)
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getDirname, unescape, tagre, normaliseURL,
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prettyMatcherList)
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from .comic import ComicStrip
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from .output import out
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from .events import getHandler
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class Scraper(object):
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'''Base class for all comic scraper, but without a specific scrape implementation.'''
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'''Base class for all comic scraper, but without a specific scrape
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implementation.'''
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# The URL for the comic strip
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url = None
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# A string that is interpolated with the strip index to yield the URL for a particular strip.
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# A string that is interpolated with the strip index to yield the URL for a
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# particular strip.
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stripUrl = None
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# Stop search for previous URLs at this URL
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@ -50,7 +55,8 @@ class Scraper(object):
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# if more than one image per URL is expected
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multipleImagesPerStrip = False
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# set to False if previous URLs do not match the strip URL (ie. because of redirects)
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# set to False if previous URLs do not match the strip URL (ie. because of
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# redirects)
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prevUrlMatchesStripUrl = True
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# set to True if this comic contains adult content
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@ -122,17 +128,22 @@ class Scraper(object):
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# remove duplicate URLs
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imageUrls = set(imageUrls)
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if len(imageUrls) > 1 and not self.multipleImagesPerStrip:
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out.warn(u"Found %d images instead of 1 at %s with expressions %s" % (len(imageUrls), url, prettyMatcherList(self.imageSearch)))
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out.warn(
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u"Found %d images instead of 1 at %s with expressions %s" %
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(len(imageUrls), url, prettyMatcherList(self.imageSearch)))
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image = sorted(imageUrls)[0]
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out.warn(u"Choosing image %s" % image)
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imageUrls = (image,)
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elif not imageUrls:
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out.warn(u"Found no images at %s with expressions %s" % (url, prettyMatcherList(self.imageSearch)))
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out.warn(u"Found no images at %s with expressions %s" % (url,
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prettyMatcherList(self.imageSearch)))
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if self.textSearch:
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text = self.fetchText(url, data, self.textSearch, optional=self.textOptional)
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text = self.fetchText(url, data, self.textSearch,
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optional=self.textOptional)
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else:
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text = None
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return ComicStrip(self.getName(), url, imageUrls, self.namer, self.session, text=text)
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return ComicStrip(self.getName(), url, imageUrls, self.namer,
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self.session, text=text)
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def getStrips(self, maxstrips=None):
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"""Get comic strips."""
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@ -284,11 +295,11 @@ class Scraper(object):
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of fetchUrls and fetchText.
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Implementation notes: While this base class does not restrict how the
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returned data is structured, subclasses (specific scrapers) should specify
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how this data works, since the stracture is passed into different methods
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which can be defined by comic modules and these methods should be able to
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use the data if they so desire... (Affected methods: shouldSkipUrl,
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imageUrlModifier)
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returned data is structured, subclasses (specific scrapers) should
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specify how this data works, since the stracture is passed into
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different methods which can be defined by comic modules and these
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methods should be able to use the data if they so desire... (Affected
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methods: shouldSkipUrl, imageUrlModifier)
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"""
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raise ValueError("No implementation for getPage!")
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@ -334,6 +345,7 @@ class Scraper(object):
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pass
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return lang
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class _BasicScraper(Scraper):
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"""
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Scraper base class that matches regular expressions against HTML pages.
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@ -369,15 +381,18 @@ class _BasicScraper(Scraper):
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for match in search.finditer(data[0]):
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searchUrl = match.group(1)
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if not searchUrl:
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raise ValueError("Pattern %s matched empty URL at %s." % (search.pattern, url))
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out.debug(u'matched URL %r with pattern %s' % (searchUrl, search.pattern))
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raise ValueError("Pattern %s matched empty URL at %s." %
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(search.pattern, url))
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out.debug(u'matched URL %r with pattern %s' %
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(searchUrl, search.pattern))
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searchUrls.append(normaliseURL(urljoin(data[1], searchUrl)))
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if searchUrls:
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# do not search other links if one pattern matched
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break
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if not searchUrls:
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patterns = [x.pattern for x in searches]
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raise ValueError("Patterns %s not found at URL %s." % (patterns, url))
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raise ValueError("Patterns %s not found at URL %s." %
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(patterns, url))
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return searchUrls
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@classmethod
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@ -387,12 +402,14 @@ class _BasicScraper(Scraper):
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match = textSearch.search(data[0])
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if match:
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text = match.group(1)
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out.debug(u'matched text %r with pattern %s' % (text, textSearch.pattern))
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out.debug(u'matched text %r with pattern %s' %
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(text, textSearch.pattern))
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return unescape(text).strip()
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if optional:
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return None
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else:
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raise ValueError("Pattern %s not found at URL %s." % (textSearch.pattern, url))
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raise ValueError("Pattern %s not found at URL %s." %
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(textSearch.pattern, url))
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else:
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return None
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@ -466,7 +483,9 @@ class _ParserScraper(Scraper):
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if optional:
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return None
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else:
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raise ValueError("XPath %s did not match anything at URL %s." % (textSearch, url))
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raise ValueError(
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"XPath %s did not match anything at URL %s." %
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(textSearch, url))
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out.debug(u'Matched text %r with XPath %s' % (text, textSearch))
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return unescape(text).strip()
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else:
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@ -476,11 +495,15 @@ class _ParserScraper(Scraper):
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def getDisabledReasons(cls):
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res = {}
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if cls.css and cssselect is None:
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res['css'] = u"This module needs the cssselect (python-cssselect) python module which is not installed."
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res['css'] = (u"This module needs the cssselect " +
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u"(python-cssselect) python module which is " +
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u"not installed.")
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if html is None:
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res['lxml'] = u"This module needs the lxml (python-lxml) python module which is not installed."
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res['lxml'] = (u"This module needs the lxml (python-lxml) " +
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u"python module which is not installed.")
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return res
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def find_scraperclasses(comic, multiple_allowed=False):
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"""Get a list comic scraper classes. Can return more than one entries if
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multiple_allowed is True, else it raises a ValueError if multiple
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@ -508,6 +531,8 @@ def find_scraperclasses(comic, multiple_allowed=False):
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_scraperclasses = None
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def get_scraperclasses():
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"""Find all comic scraper classes in the plugins directory.
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The result is cached.
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@ -519,7 +544,7 @@ def get_scraperclasses():
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out.debug(u"Loading comic modules...")
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modules = loader.get_modules('plugins')
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plugins = loader.get_plugins(modules, Scraper)
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_scraperclasses = list(plugins)
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_scraperclasses = sorted(plugins, key=lambda p: p.getName())
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check_scrapers()
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out.debug(u"... %d modules loaded." % len(_scraperclasses))
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return _scraperclasses
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@ -533,7 +558,8 @@ def check_scrapers():
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if name in d:
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name1 = scraperclass.getName()
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name2 = d[name].getName()
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raise ValueError('duplicate scrapers %s and %s found' % (name1, name2))
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raise ValueError('duplicate scrapers %s and %s found' %
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(name1, name2))
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d[name] = scraperclass
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