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Allow using the webengine backend in recipes

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Kovid Goyal 2024-08-16 20:01:50 +05:30
parent 5c8332e438
commit 5b00e588b2
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3 changed files with 9 additions and 8 deletions
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1
recipes/science_journal.recipe
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@ -43,7 +43,6 @@ class science(BasicNewsRecipe):
classes('pb-ad')
]
browser_type = 'qt'
simultaneous_downloads = 1 # server returns invalid data on HTTP2 connections when multiple requests are queued on the same connection
def preprocess_html(self, soup):
for p in soup.findAll(attrs={'role':'paragraph'}):

2
src/calibre/scraper/webengine_backend.py
View File

@ -216,7 +216,7 @@ class FetchBackend(QObject):
self.timeout_timer.start()
return
if len(self.workers) < 5:
self.workers.append(self.create_worker)
self.workers.append(self.create_worker())
self.workers[-1].start_download(self.output_dir, req, data)
self.timeout_timer.start()
return

14
src/calibre/web/feeds/news.py
View File

@ -428,9 +428,10 @@ class BasicNewsRecipe(Recipe):
recipe_specific_options = None
#: The simulated browser engine to use when downloading from servers. The default is to use the Python mechanize
#: browser engine. An alternate is "qt" which will use the network engine from the Qt toolkit.
#: The mechanize engine supports logging in, the Qt engine does not. However, the Qt engine supports HTTP/2 and
#: similar technologies and also is harder for bot interception services to fingerprint.
#: browser engine, which supports logging in. However, if you don't need logging in, consider changing this
#: to either 'webengine' which uses an actual Chromium browser to do the network requests or 'qt' which
#: uses the Qt Networking backend. Both 'webengine' and 'qt' support HTTP/2, which mechanize does not and
#: are thus harder to fingerprint for bot protection services.
browser_type = 'mechanize'
#: Set to False if you do not want to use gzipped transfers with the mechanize browser.
@ -571,9 +572,10 @@ class BasicNewsRecipe(Recipe):
ua = getattr(self, 'last_used_user_agent', None) or self.calibre_most_common_ua or random_user_agent(allow_ie=False)
kwargs['user_agent'] = self.last_used_user_agent = ua
self.log('Using user agent:', kwargs['user_agent'])
if self.browser_type == 'qt':
from calibre.scraper.qt import Browser
return Browser(user_agent=kwargs['user_agent'], verify_ssl_certificates=kwargs.get('verify_ssl_certificates', False))
if self.browser_type != 'mechanize':
from calibre.scraper.qt import Browser, WebEngineBrowser
return {'qt': Browser, 'webengine': WebEngineBrowser}[self.browser_type](
user_agent=kwargs['user_agent'], verify_ssl_certificates=kwargs.get('verify_ssl_certificates', False))
br = browser(*args, **kwargs)
br.addheaders += [('Accept', '*/*')]
if self.handle_gzip: