def parse_page(self, response):
'''
parse page does multiple things:
1) loads replied-to-comments page one-by-one (for DFS)
2) retrieves not-replied-to comments
'''
#loads replied-to comments pages
path = './/div[string-length(@class) = 2 and count(@id)=1 and contains("0123456789", substring(@id,1,1)) and .//div[contains(@id,"comment_replies")]]' + '[' + str(
response.meta['index']) + ']'
for reply in response.xpath(path):
source = reply.xpath(
"substring-before(.//h3/a/@href, concat(substring('&', 1 div contains(.//h3/a/@href, 'profile.php')), substring('?', 1 div not(contains(.//h3/a/@href, 'profile.php')))))"
).extract()
answer = reply.xpath(
'.//a[contains(@href,"repl")]/@href').extract()
ans = response.urljoin(answer[::-1][0])
self.logger.info('{} nested comment @ page {}'.format(
str(response.meta['index']), ans))
yield scrapy.Request(ans,
callback=self.parse_reply,
meta={
'reply_to': source,
'url': response.url,
'index': response.meta['index'],
'flag': 'init'
})
#loads regular comments
if not response.xpath(path):
path2 = './/div[string-length(@class) = 2 and count(@id)=1 and contains("0123456789", substring(@id,1,1)) and not(.//div[contains(@id,"comment_replies")])]'
for i, reply in enumerate(response.xpath(path2)):
self.logger.info('{} regular comment @ page {}'.format(
i, response.url))
new = ItemLoader(item=CommentsItem(), selector=reply)
new.context['lang'] = self.lang
new.add_xpath(
'source',
"substring-before(.//h3/a/@href, concat(substring('&', 1 div contains(.//h3/a/@href, 'profile.php')), substring('?', 1 div not(contains(.//h3/a/@href, 'profile.php')))))"
)
new.add_xpath('text', './/div[h3]/div[1]//text()')
new.add_xpath('date', './/abbr/text()')
new.add_xpath(
'reactions',
'.//a[contains(@href,"reaction/profile")]//text()')
new.add_value('url', response.url)
yield new.load_item()
#previous comments
if not response.xpath(path):
for next_page in response.xpath(
'.//div[contains(@id,"see_next")]'):
new_page = next_page.xpath('.//@href').extract()
new_page = response.urljoin(new_page[0])
self.logger.info('New page to be crawled {}'.format(new_page))
yield scrapy.Request(new_page,
callback=self.parse_page,
meta={'index': 1})
def parse_reply(self, response):
'''
parse reply to comments, root comment is added if flag
'''
# from scrapy.utils.response import open_in_browser
# open_in_browser(response)
if response.meta['flag'] == 'init':
#parse root comment
for root in response.xpath(
'//div[contains(@id,"root")]/div/div/div[count(@id)!=1 and contains("0123456789", substring(@id,1,1))]'
):
new = ItemLoader(item=CommentsItem(), selector=root)
new.context['lang'] = self.lang
new.add_xpath('source', './/h3/a/text()')
new.add_xpath('source_url', './/h3/a/@href')
profile_img = ""
# source_url = str(response.xpath(".//h3/a/@href").get())
# index1 = source_url.find("/profile.php?id=")
# if index1 != -1:
# index2 = source_url.find("&fref=nf&refid=18&__tn__=")
# if index2 == -1:
# index2 = source_url.find("&refid=18&__tn__=")
# source_url = source_url[index1+16:index2]
# profile_img = "https://graph.facebook.com/{}/picture?type=large".format(source_url)
# else:
# index2 = source_url.find("?fref=nf&refid=18&__tn__=-R")
# source_url = source_url[1:index2]
# profile_img = "https://avatars.io/facebook/{}".format(source_url)
# new._add_value('source_url', source_url)
new._add_value('profile_img', profile_img)
new.add_value('reply_to', 'ROOT')
new.add_xpath('text', './/div[1]//text()')
# new.add_xpath('date','.//abbr/text()')
date_string = response.xpath('.//abbr/text()').get()
date = parse_date2([date_string], {'lang': self.lang})
new._add_value('date', date)
new.add_xpath(
'reactions',
'.//a[contains(@href,"reaction/profile")]//text()')
# new.add_value('url',response.url)
yield new.load_item()
#parse all replies in the page
for reply in response.xpath(
'//div[contains(@id,"root")]/div/div/div[count(@id)=1 and contains("0123456789", substring(@id,1,1))]'
):
new = ItemLoader(item=CommentsItem(), selector=reply)
new.context['lang'] = self.lang
new.add_xpath('source', './/h3/a/text()')
new.add_xpath('source_url', './/h3/a/@href')
profile_img = ""
# source_url = str(response.xpath(".//h3/a/@href").get())
# index1 = source_url.find("/profile.php?id=")
# if index1 != -1:
# index2 = source_url.find("&fref=nf&refid=18&__tn__=")
# if index2 == -1:
# index2 = source_url.find("&refid=18&__tn__=")
# source_url = source_url[index1+16:index2]
# profile_img = "https://graph.facebook.com/{}/picture?type=large".format(source_url)
# else:
# index2 = source_url.find("?fref=nf&refid=18&__tn__=-R")
# source_url = source_url[1:index2]
# profile_img = "https://avatars.io/facebook/{}".format(source_url)
# new._add_value('source_url', source_url)
new._add_value('profile_img', profile_img)
new.add_value('reply_to', response.meta['reply_to'])
new.add_xpath('text', './/div[h3]/div[1]//text()')
# new.add_xpath('date','.//abbr/text()')
date_string = response.xpath('.//abbr/text()').get()
date = parse_date2([date_string], {'lang': self.lang})
new._add_value('date', date)
new.add_xpath(
'reactions',
'.//a[contains(@href,"reaction/profile")]//text()')
# new.add_value('url',response.url)
yield new.load_item()
back = response.xpath(
'//div[contains(@id,"comment_replies_more_1")]/a/@href'
).extract()
if back:
self.logger.info('Back found, more nested comments')
back_page = response.urljoin(back[0])
yield scrapy.Request(back_page,
callback=self.parse_reply,
priority=1000,
meta={
'reply_to': response.meta['reply_to'],
'flag': 'back',
'url': response.meta['url'],
'index': response.meta['index'],
'group': response.meta['group']
})
else:
next_reply = response.meta['url']
self.logger.info(
'Nested comments crawl finished, heading to proper page: {}'
.format(response.meta['url']))
yield scrapy.Request(next_reply,
callback=self.parse_post,
meta={
'index': response.meta['index'] + 1,
'group': response.meta['group']
})
elif response.meta['flag'] == 'back':
#parse all comments
for reply in response.xpath(
'//div[contains(@id,"root")]/div/div/div[count(@id)=1 and contains("0123456789", substring(@id,1,1))]'
):
new = ItemLoader(item=CommentsItem(), selector=reply)
new.context['lang'] = self.lang
new.add_xpath('source', './/h3/a/text()')
new.add_xpath('source_url', './/h3/a/@href')
profile_img = ""
# source_url = str(response.xpath(".//h3/a/@href").get())
# index1 = source_url.find("/profile.php?id=")
# if index1 != -1:
# index2 = source_url.find("&fref=nf&refid=18&__tn__=")
# if index2 == -1:
# index2 = source_url.find("&refid=18&__tn__=")
# source_url = source_url[index1+16:index2]
# profile_img = "https://graph.facebook.com/{}/picture?type=large".format(source_url)
# else:
# index2 = source_url.find("?fref=nf&refid=18&__tn__=-R")
# source_url = source_url[1:index2]
# profile_img = "https://avatars.io/facebook/{}".format(source_url)
# new._add_value('source_url', source_url)
new._add_value('profile_img', profile_img)
new.add_value('reply_to', response.meta['reply_to'])
new.add_xpath('text', './/div[h3]/div[1]//text()')
# new.add_xpath('date','.//abbr/text()')
date_string = response.xpath('.//abbr/text()').get()
date = parse_date2([date_string], {'lang': self.lang})
new._add_value('date', date)
new.add_xpath(
'reactions',
'.//a[contains(@href,"reaction/profile")]//text()')
# new.add_value('url',response.url)
yield new.load_item()
#keep going backwards
back = response.xpath(
'//div[contains(@id,"comment_replies_more_1")]/a/@href'
).extract()
self.logger.info('Back found, more nested comments')
if back:
back_page = response.urljoin(back[0])
yield scrapy.Request(back_page,
callback=self.parse_reply,
priority=1000,
meta={
'reply_to': response.meta['reply_to'],
'flag': 'back',
'url': response.meta['url'],
'index': response.meta['index'],
'group': response.meta['group']
})
else:
next_reply = response.meta['url']
self.logger.info(
'Nested comments crawl finished, heading to home page: {}'.
format(response.meta['url']))
yield scrapy.Request(next_reply,
callback=self.parse_post,
meta={
'index': response.meta['index'] + 1,
'group': response.meta['group']
})
# =============================================================================
# CRAWL REACTIONS
# =============================================================================
# def parse_reactions(self,response):
# new = ItemLoader(item=CommentsItem(),response=response, parent=response.meta['item'])
# new.context['lang'] = self.lang
# new.add_xpath('likes',"//a[contains(@href,'reaction_type=1')]/span/text()")
# new.add_xpath('ahah',"//a[contains(@href,'reaction_type=4')]/span/text()")
# new.add_xpath('love',"//a[contains(@href,'reaction_type=2')]/span/text()")
# new.add_xpath('wow',"//a[contains(@href,'reaction_type=3')]/span/text()")
# new.add_xpath('sigh',"//a[contains(@href,'reaction_type=7')]/span/text()")
# new.add_xpath('grrr',"//a[contains(@href,'reaction_type=8')]/span/text()")
# yield new.load_item()
#
# #substitute
# yield new.load_item()
# ‾‾‾‾‾‾‾‾‾|‾‾‾‾‾‾‾‾‾‾‾
# _________v___
# #response --> reply/root
# reactions = response.xpath(".//a[contains(@href,'reaction/profile')]/@href")
# reactions = response.urljoin(reactions[0].extract())
# if reactions:
# yield scrapy.Request(reactions, callback=self.parse_reactions, meta={'item':new})
# else:
# yield new.load_item()
def parse_post(self, response):
'''
parse post does multiple things:
1) loads replied-to-comments page one-by-one (for DFS)
2) call parse_reply on the nested comments
3) adds simple (not-replied-to) comments
4) follows to new comment page
'''
#load replied-to comments pages
#select nested comment one-by-one matching with the index: response.meta['index']
path = './/div[string-length(@class) = 2 and count(@id)=1 and contains("0123456789", substring(@id,1,1)) and .//div[contains(@id,"comment_replies")]]' + '[' + str(
response.meta['index']) + ']'
group_flag = response.meta[
'group'] if 'group' in response.meta else None
for reply in response.xpath(path):
source = reply.xpath('.//h3/a/text()').extract()
answer = reply.xpath(
'.//a[contains(@href,"repl")]/@href').extract()
ans = response.urljoin(answer[::-1][0])
self.logger.info('{} nested comment'.format(
str(response.meta['index'])))
yield scrapy.Request(ans,
callback=self.parse_reply,
priority=1000,
meta={
'reply_to': source,
'url': response.url,
'index': response.meta['index'],
'flag': 'init',
'group': group_flag
})
#load regular comments
if not response.xpath(path): #prevents from exec
path2 = './/div[string-length(@class) = 2 and count(@id)=1 and contains("0123456789", substring(@id,1,1)) and not(.//div[contains(@id,"comment_replies")])]'
for i, reply in enumerate(response.xpath(path2)):
self.logger.info('{} regular comment'.format(i + 1))
new = ItemLoader(item=CommentsItem(), selector=reply)
new.context['lang'] = self.lang
new.add_xpath('source', './/h3/a/text()')
new.add_xpath('source_url', './/h3/a/@href')
profile_img = ""
# source_url = str(response.xpath(".//h3/a/@href").get())
# index1 = source_url.find("/profile.php?id=")
# if index1 != -1:
# index2 = source_url.find("&fref=nf&refid=18&__tn__=")
# if index2 == -1:
# index2 = source_url.find("&refid=18&__tn__=")
# source_url = source_url[index1+16:index2]
# profile_img = "https://graph.facebook.com/{}/picture?type=large".format(source_url)
# else:
# index2 = source_url.find("?fref=nf&refid=18&__tn__=-R")
# source_url = source_url[1:index2]
# profile_img = "https://avatars.io/facebook/{}".format(source_url)
# new._add_value('source_url', source_url)
new._add_value('profile_img', profile_img)
new.add_xpath('text', './/div[h3]/div[1]//text()')
new.add_xpath('img', './/div[h3]/div[2]/img/@src')
# new.add_xpath('date','.//abbr/text()')
date_string = response.xpath('.//abbr/text()').get()
date = parse_date2([date_string], {'lang': self.lang})
new._add_value('date', date)
new.add_xpath(
'reactions',
'.//a[contains(@href,"reaction/profile")]//text()')
# new.add_value('url',response.url)
yield new.load_item()
#new comment page
if not response.xpath(path):
#for groups
next_xpath = './/div[contains(@id,"see_next")]'
prev_xpath = './/div[contains(@id,"see_prev")]'
if not response.xpath(next_xpath) or group_flag == 1:
for next_page in response.xpath(prev_xpath):
new_page = next_page.xpath('.//@href').extract()
new_page = response.urljoin(new_page[0])
self.logger.info(
'New page to be crawled {}'.format(new_page))
yield scrapy.Request(new_page,
callback=self.parse_post,
meta={
'index': 1,
'group': 1
})
else:
for next_page in response.xpath(next_xpath):
new_page = next_page.xpath('.//@href').extract()
new_page = response.urljoin(new_page[0])
self.logger.info(
'New page to be crawled {}'.format(new_page))
yield scrapy.Request(new_page,
callback=self.parse_post,
meta={
'index': 1,
'group': group_flag
})
def parse_reply(self,response):
'''
parse reply to comments, root comment is added if flag
'''
# from scrapy.utils.response import open_in_browser
# open_in_browser(response)
if response.meta['flag'] == 'init':
#parse root comment
for root in response.xpath(xAll_ROOT_DIV):
new = ItemLoader(item=CommentsItem(),selector=root)
new.context['lang'] = self.lang
new.add_xpath('source',xREPLY_['attributes']['source'])
new.add_xpath('source_url',xREPLY_['attributes']['source_url'])
new.add_value('reply_to','ROOT')
new.add_xpath('text',xREPLY_['attributes']['text_root'])
new.add_xpath('date',xREPLY_['attributes']['date'])
new.add_xpath('reactions',xREPLY_['attributes']['reactions'])
new.add_value('url',response.url)
yield new.load_item()
#parse all replies in the page
for reply in response.xpath(xAll_REPLIES_DIV):
new = ItemLoader(item=CommentsItem(),selector=reply)
new.context['lang'] = self.lang
new.add_xpath('source_url',xREPLY_['attributes']['source_url'])
new.add_value('reply_to',response.meta['reply_to'])
new.add_xpath('text',xREPLY_['attributes']['text_child'])
new.add_xpath('date',xREPLY_['attributes']['date'])
new.add_xpath('reactions','.//a[contains(@href,"reaction/profile")]//text()')
new.add_value('url',response.url)
yield new.load_item()
back = response.xpath('//div[contains(@id,"comment_replies_more_1")]/a/@href').extract()
if back:
self.logger.info('Back found, more nested comments')
back_page = response.urljoin(back[0])
yield scrapy.Request(back_page,
callback=self.parse_reply,
priority = 1000,
meta={'reply_to':response.meta['reply_to'],
'flag':'back',
'url':response.meta['url'],
'index':response.meta['index'],
'group':response.meta['group']})
else:
next_reply = response.meta['url']
self.logger.info('Nested comments crawl finished, heading to proper page: {}'.format(response.meta['url']))
yield scrapy.Request(next_reply,
callback=self.parse_post,
meta={'index':response.meta['index']+1,
'group':response.meta['group']})
elif response.meta['flag'] == 'back':
#parse all comments
for reply in response.xpath('//div[contains(@id,"root")]/div/div/div[count(@id)=1 and contains("0123456789", substring(@id,1,1))]'):
new = ItemLoader(item=CommentsItem(),selector=reply)
new.context['lang'] = self.lang
new.add_xpath('source',xREPLY_['attributes']['source'])
new.add_xpath('source_url',xREPLY_['attributes']['source_url'])
new.add_value('reply_to',response.meta['reply_to'])
new.add_xpath('text',xREPLY_['attributes']['text_child'])
new.add_xpath('date',xREPLY_['attributes']['date'])
new.add_xpath('reactions',xREPLY_['attributes']['reactions'])
new.add_value('url',response.url)
yield new.load_item()
#keep going backwards
back = response.xpath('//div[contains(@id,"comment_replies_more_1")]/a/@href').extract()
self.logger.info('Back found, more nested comments')
if back:
back_page = response.urljoin(back[0])
yield scrapy.Request(back_page,
callback=self.parse_reply,
priority=1000,
meta={'reply_to':response.meta['reply_to'],
'flag':'back',
'url':response.meta['url'],
'index':response.meta['index'],
'group':response.meta['group']})
else:
next_reply = response.meta['url']
self.logger.info('Nested comments crawl finished, heading to home page: {}'.format(response.meta['url']))
yield scrapy.Request(next_reply,
callback=self.parse_post,
meta={'index':response.meta['index']+1,
'group':response.meta['group']})
def parse_post(self, response):
'''
parse post does multiple things:
1) loads replied-to-comments page one-by-one (for DFS)
2) call parse_reply on the nested comments
3) adds simple (not-replied-to) comments
4) follows to new comment page
'''
#load replied-to comments pages
#select nested comment one-by-one matching with the index: response.meta['index']
path = xNESTED_COMMENT_['root'] % (str(response.meta['index']))
group_flag = response.meta['group'] if 'group' in response.meta else None
for reply in response.xpath(path):
source = reply.xpath( xNESTED_COMMENT_['attributes']['source'] ).extract()
answer = reply.xpath(xNESTED_COMMENT_['attributes']['answer']).extract()
ans = response.urljoin(answer[::-1][0])
self.logger.info('{} nested comment'.format(str(response.meta['index'])))
yield scrapy.Request(ans,
callback=self.parse_reply,
priority=1000,
meta={'reply_to':source,
'url':response.url,
'index':response.meta['index'],
'flag':'init',
'group':group_flag})
#load regular comments
if not response.xpath(path): #prevents from exec
path2 = xREGULAR_COMMENT_['root']
for i,reply in enumerate(response.xpath(path2)):
self.logger.info('{} regular comment'.format(i+1))
new = ItemLoader(item=CommentsItem(),selector=reply)
new.context['lang'] = self.lang
new.add_xpath('source',xREGULAR_COMMENT_['attributes']['source'])
new.add_xpath('source_url',xREGULAR_COMMENT_['attributes']['source_url'])
new.add_xpath('text',xREGULAR_COMMENT_['attributes']['text'])
new.add_xpath('date',xREGULAR_COMMENT_['attributes']['date'])
new.add_xpath('reactions',xREGULAR_COMMENT_['attributes']['reactions'])
new.add_value('url',response.url)
yield new.load_item()
#new comment page
if not response.xpath(path):
#for groups
next_xpath = xNEXT_COMMENTS_['root']
prev_xpath = xPREV_COMMENTS_DIV
if not response.xpath(next_xpath) or group_flag == 1:
for next_page in response.xpath(prev_xpath):
new_page = next_page.xpath(xNEXT_COMMENTS_['attributes']['new_page']).extract()
new_page = response.urljoin(new_page[0])
self.logger.info('New page to be crawled {}'.format(new_page))
yield scrapy.Request(new_page,
callback=self.parse_post,
meta={'index':1,
'group':1})
else:
for next_page in response.xpath(next_xpath):
new_page = next_page.xpath('.//@href').extract()
new_page = response.urljoin(new_page[0])
self.logger.info('New page to be crawled {}'.format(new_page))
yield scrapy.Request(new_page,
callback=self.parse_post,
meta={'index':1,
'group':group_flag})
def parse_post(self, response):
'''
parse post does multiple things:
1) loads replied-to-comments page one-by-one
2) call parse_reply on the nested comments
3) adds simple (not-replied-to) comments
4) goes to new comment page
'''
#load replied-to comments pages
path = './/div[string-length(@class) = 2 and count(@id)=1 and contains("0123456789", substring(@id,1,1)) and .//div[contains(@id,"comment_replies")]]' + '[' + str(
response.meta['index']) + ']'
group_flag = response.meta[
'group'] if 'group' in response.meta else None
post_id = response.meta['post_id']
current_date = response.meta['current_date']
for reply in response.xpath(path):
source = reply.xpath('.//h3/a/text()').extract()
answer = reply.xpath(
'.//a[contains(@href,"repl")]/@href').extract()
ans = response.urljoin(answer[::-1][0])
self.logger.info('{} nested comment'.format(
str(response.meta['index'])))
yield scrapy.Request(ans,
callback=self.parse_reply,
priority=1000,
meta={
'reply_to': source,
'url': response.url,
'index': response.meta['index'],
'flag': 'init',
'group': group_flag,
'post_id': post_id,
'current_date': current_date
})
#load regular comments
if not response.xpath(path):
path2 = './/div[string-length(@class) = 2 and count(@id)=1 and contains("0123456789", substring(@id,1,1)) and not(.//div[contains(@id,"comment_replies")])]'
for i, reply in enumerate(response.xpath(path2)):
self.logger.info('{} regular comment'.format(i + 1))
new = ItemLoader(item=CommentsItem(), selector=reply)
new.context['lang'] = self.lang
new.add_xpath('source', './/h3/a/text()')
new.add_xpath('source_url', './/h3/a/@href')
new.add_xpath('text', './/div[h3]/div[1]//text()')
new.add_value('reply_to', 'ROOT')
new.add_xpath(
'reactions',
'.//a[contains(@href,"reaction/profile")]//text()')
new.add_value('url', response.url)
new.add_value('post_id', post_id)
yield new.load_item()
#new comment page
if not response.xpath(path):
next_xpath = './/div[contains(@id,"see_next")]'
prev_xpath = './/div[contains(@id,"see_prev")]'
if not response.xpath(next_xpath) or group_flag == 1:
for next_page in response.xpath(prev_xpath):
new_page = next_page.xpath('.//@href').extract()
new_page = response.urljoin(new_page[0])
self.logger.info(
'New page to be crawled {}'.format(new_page))
yield scrapy.Request(new_page,
callback=self.parse_post,
meta={
'index': 1,
'group': 1,
'post_id': post_id,
'current_date': current_date
})
if self.date >= current_date:
raise CloseSpider('Reached date: {}'.format(self.date))
else:
for next_page in response.xpath(next_xpath):
new_page = next_page.xpath('.//@href').extract()
new_page = response.urljoin(new_page[0])
self.logger.info(
'New page to be crawled {}'.format(new_page))
yield scrapy.Request(new_page,
callback=self.parse_post,
meta={
'index': 1,
'group': group_flag,
'post_id': post_id,
'current_date': current_date
})
if self.date >= current_date:
raise CloseSpider('Reached date: {}'.format(self.date))
def parse_page(self, response):
'''
parse page does multiple things:
1) loads replied-to-comments page one-by-one (for DFS)
2) call parse_reply on the nested comments
3) adds simple (not-replied-to) comments
4) follows to new comment page
'''
#load replied-to comments pages
#select nested comment one-by-one matching with the index: response.meta['index']
path = './/div[string-length(@class) = 2 and count(@id)=1 and contains("0123456789", substring(@id,1,1)) and .//div[contains(@id,"comment_replies")]]' + '[' + str(
response.meta['index']) + ']'
group_flag = response.meta[
'group'] if 'group' in response.meta else None
for reply in response.xpath(path):
source = reply.xpath('.//h3/a/text()').extract()
answer = reply.xpath(
'.//a[contains(@href,"repl")]/@href').extract()
ans = response.urljoin(answer[::-1][0])
self.logger.info('{} nested comment @ page {}'.format(
str(response.meta['index']), ans))
yield scrapy.Request(ans,
callback=self.parse_reply,
meta={
'reply_to': source,
'url': response.url,
'index': response.meta['index'],
'flag': 'init',
'group': group_flag
})
#load regular comments
if not response.xpath(path): #prevents from exec
path2 = './/div[string-length(@class) = 2 and count(@id)=1 and contains("0123456789", substring(@id,1,1)) and not(.//div[contains(@id,"comment_replies")])]'
for i, reply in enumerate(response.xpath(path2)):
self.logger.info('{} regular comment @ page {}'.format(
i, response.url))
new = ItemLoader(item=CommentsItem(), selector=reply)
new.context['lang'] = self.lang
new.add_xpath('source', './/h3/a/text()')
new.add_xpath('source_url', './/h3/a/@href')
new.add_xpath('text', './/div[h3]/div[1]//text()')
new.add_xpath('date', './/abbr/text()')
new.add_xpath(
'reactions',
'.//a[contains(@href,"reaction/profile")]//text()')
new.add_value('url', response.url)
yield new.load_item()
#new comment page
if not response.xpath(path):
#for groups
next_xpath = './/div[contains(@id,"see_next")]'
prev_xpath = './/div[contains(@id,"see_prev")]'
if not response.xpath(next_xpath) or group_flag == 1:
for next_page in response.xpath(prev_xpath):
new_page = next_page.xpath('.//@href').extract()
new_page = response.urljoin(new_page[0])
self.logger.info(
'New page to be crawled {}'.format(new_page))
yield scrapy.Request(new_page,
callback=self.parse_page,
meta={
'index': 1,
'group': 1
})
else:
for next_page in response.xpath(next_xpath):
new_page = next_page.xpath('.//@href').extract()
new_page = response.urljoin(new_page[0])
self.logger.info(
'New page to be crawled {}'.format(new_page))
yield scrapy.Request(new_page,
callback=self.parse_page,
meta={
'index': 1,
'group': group_flag
})
def parse_reply(self, response):
'''
parse reply to comments, root comment is added if flag
'''
if response.meta['flag'] == 'init':
#parse root comment
for root in response.xpath(
'//div[contains(@id,"root")]/div/div/div[count(@id)!=1 and contains("0123456789", substring(@id,1,1))]'
):
new = ItemLoader(item=CommentsItem(), selector=root)
new.context['lang'] = self.lang
new.add_xpath('source', './/h3/a/text()')
new.add_xpath('source_url', './/h3/a/@href')
new.add_value('reply_to', 'ROOT')
new.add_xpath('text', './/div[1]//text()')
new.add_xpath('date', './/abbr/text()')
new.add_xpath(
'reactions',
'.//a[contains(@href,"reaction/profile")]//text()')
new.add_value('url', response.url)
yield new.load_item()
#parse all replies in the page
for reply in response.xpath(
'//div[contains(@id,"root")]/div/div/div[count(@id)=1 and contains("0123456789", substring(@id,1,1))]'
):
new = ItemLoader(item=CommentsItem(), selector=reply)
new.context['lang'] = self.lang
new.add_xpath('source', './/h3/a/text()')
new.add_xpath('source_url', './/h3/a/@href')
new.add_value('reply_to', response.meta['reply_to'])
new.add_xpath('text', './/div[h3]/div[1]//text()')
new.add_xpath('date', './/abbr/text()')
new.add_xpath(
'reactions',
'.//a[contains(@href,"reaction/profile")]//text()')
new.add_value('url', response.url)
yield new.load_item()
back = response.xpath(
'//div[contains(@id,"comment_replies_more_1")]/a/@href'
).extract()
if back:
self.logger.info('Back found, more nested comments')
back_page = response.urljoin(back[0])
yield scrapy.Request(back_page,
callback=self.parse_reply,
priority=100,
meta={
'reply_to': response.meta['reply_to'],
'flag': 'back',
'url': response.meta['url'],
'index': response.meta['index'],
'group': response.meta['group']
})
else:
next_reply = response.meta['url']
self.logger.info(
'Nested comments crawl finished, heading to proper page: {}'
.format(response.meta['url']))
yield scrapy.Request(next_reply,
callback=self.parse_page,
meta={
'index': response.meta['index'] + 1,
'group': response.meta['group']
})
elif response.meta['flag'] == 'back':
#parse all comments
for reply in response.xpath(
'//div[contains(@id,"root")]/div/div/div[count(@id)=1 and contains("0123456789", substring(@id,1,1))]'
):
new = ItemLoader(item=CommentsItem(), selector=reply)
new.context['lang'] = self.lang
new.add_xpath('source', './/h3/a/text()')
new.add_xpath('source_url', './/h3/a/@href')
new.add_value('reply_to', response.meta['reply_to'])
new.add_xpath('text', './/div[h3]/div[1]//text()')
new.add_xpath('date', './/abbr/text()')
new.add_xpath(
'reactions',
'.//a[contains(@href,"reaction/profile")]//text()')
new.add_value('url', response.url)
yield new.load_item()
#keep going backwards
back = response.xpath(
'//div[contains(@id,"comment_replies_more_1")]/a/@href'
).extract()
self.logger.info('Back found, more nested comments')
if back:
back_page = response.urljoin(back[0])
yield scrapy.Request(back_page,
callback=self.parse_reply,
priority=100,
meta={
'reply_to': response.meta['reply_to'],
'flag': 'back',
'url': response.meta['url'],
'index': response.meta['index'],
'group': response.meta['group']
})
else:
next_reply = response.meta['url']
self.logger.info(
'Nested comments crawl finished, heading to home page: {}'.
format(response.meta['url']))
yield scrapy.Request(next_reply,
callback=self.parse_page,
meta={
'index': response.meta['index'] + 1,
'group': response.meta['group']
})
# =============================================================================
# CRAWL REACTIONS
# =============================================================================
# def parse_reactions(self,response):
# new = ItemLoader(item=CommentsItem(),response=response, parent=response.meta['item'])
# new.context['lang'] = self.lang
# new.add_xpath('likes',"//a[contains(@href,'reaction_type=1')]/span/text()")
# new.add_xpath('ahah',"//a[contains(@href,'reaction_type=4')]/span/text()")
# new.add_xpath('love',"//a[contains(@href,'reaction_type=2')]/span/text()")
# new.add_xpath('wow',"//a[contains(@href,'reaction_type=3')]/span/text()")
# new.add_xpath('sigh',"//a[contains(@href,'reaction_type=7')]/span/text()")
# new.add_xpath('grrr',"//a[contains(@href,'reaction_type=8')]/span/text()")
# yield new.load_item()
#
# #substitute
# yield new.load_item()
# ‾‾‾‾‾‾‾‾‾|‾‾‾‾‾‾‾‾‾‾‾
# _________v___
# #response --> reply/root
# reactions = response.xpath(".//a[contains(@href,'reaction/profile')]/@href")
# reactions = response.urljoin(reactions[0].extract())
# if reactions:
# yield scrapy.Request(reactions, callback=self.parse_reactions, meta={'item':new})
# else:
# yield new.load_item()
def parse_reply(self, response):
'''
parse reply to comments, root comment is added if flag
'''
if response.meta['flag'] == 'init':
#parse root comment
for root in response.xpath(
'//div[contains(@id,"root")]/div/div/div[count(@id)!=1 and contains("0123456789", substring(@id,1,1))]'
):
new = ItemLoader(item=CommentsItem(), selector=root)
new.context['lang'] = self.lang
new.add_xpath('source', './/h3/a/text()')
new.add_value('reply_to', 'ROOT')
new.add_xpath('text', './/div[1]//text()')
new.add_xpath('date', './/abbr/text()')
new.add_value('url', response.url)
yield new.load_item()
#parse all replies in the page
for reply in response.xpath(
'//div[contains(@id,"root")]/div/div/div[count(@id)=1 and contains("0123456789", substring(@id,1,1))]'
):
new = ItemLoader(item=CommentsItem(), selector=reply)
new.context['lang'] = self.lang
new.add_xpath('source', './/h3/a/text()')
new.add_value('reply_to', response.meta['reply_to'])
new.add_xpath('text', './/div[h3]/div[1]//text()')
new.add_xpath('date', './/abbr/text()')
new.add_value('url', response.url)
yield new.load_item()
back = response.xpath(
'//div[contains(@id,"comment_replies_more_1")]/a/@href'
).extract()
if back:
self.logger.info('Back found, trying to go back')
back_page = response.urljoin(back[0])
yield scrapy.Request(back_page,
callback=self.parse_reply,
priority=100,
meta={
'reply_to': response.meta['reply_to'],
'flag': 'back',
'url': response.meta['url'],
'index': response.meta['index']
})
else:
next_reply = response.meta['url']
self.logger.info(
'Nested comments crawl finished, heading to home page: {}'.
format(response.meta['url']))
yield scrapy.Request(
next_reply,
dont_filter=True,
callback=self.parse_page,
meta={'index': response.meta['index'] + 1})
elif response.meta['flag'] == 'back':
#parse all comments
for reply in response.xpath(
'//div[contains(@id,"root")]/div/div/div[count(@id)=1 and contains("0123456789", substring(@id,1,1))]'
):
new = ItemLoader(item=CommentsItem(), selector=reply)
new.context['lang'] = self.lang
new.add_xpath('source', './/h3/a/text()')
new.add_value('reply_to', response.meta['reply_to'])
new.add_xpath('text', './/div[h3]/div[1]//text()')
new.add_xpath('date', './/abbr/text()')
new.add_value('url', response.url)
yield new.load_item()
#keep going backwards
back = response.xpath(
'//div[contains(@id,"comment_replies_more_1")]/a/@href'
).extract()
self.logger.info('Back found, trying to go back')
if back:
back_page = response.urljoin(back[0])
yield scrapy.Request(back_page,
callback=self.parse_reply,
priority=100,
meta={
'reply_to': response.meta['reply_to'],
'flag': 'back',
'url': response.meta['url'],
'index': response.meta['index']
})
else:
next_reply = response.meta['url']
self.logger.info(
'Nested comments crawl finished, heading to home page: {}'.
format(response.meta['url']))
yield scrapy.Request(
next_reply,
dont_filter=True,
callback=self.parse_page,
meta={'index': response.meta['index'] + 1})
def parse_reply(self, response):
"""
parse reply to comments, root comment is added if flag
"""
# from scrapy.utils.response import open_in_browser
# open_in_browser(response)
if response.meta["flag"] == "init":
# parse root comment
for root in response.xpath(
'//div[contains(@id,"root")]/div/div/div[count(@id)!=1 and contains("0123456789", substring(@id,1,1))]'
):
new = ItemLoader(item=CommentsItem(), selector=root)
new.context["lang"] = self.lang
new.add_xpath("source", ".//h3/a/text()")
new.add_xpath("source_url", ".//h3/a/@href")
new.add_value("reply_to", "ROOT")
new.add_xpath("text", ".//div[1]//text()")
new.add_xpath("date", ".//abbr/text()")
new.add_xpath(
"reactions",
'.//a[contains(@href,"reaction/profile")]//text()')
new.add_value("post_id", response.meta["post_id"])
new.add_value("url", response.url)
yield new.load_item()
# parse all replies in the page
for reply in response.xpath(
'//div[contains(@id,"root")]/div/div/div[count(@id)=1 and contains("0123456789", substring(@id,1,1))]'
):
new = ItemLoader(item=CommentsItem(), selector=reply)
new.context["lang"] = self.lang
new.add_xpath("source", ".//h3/a/text()")
new.add_xpath("source_url", ".//h3/a/@href")
new.add_value("reply_to", response.meta["reply_to"])
new.add_xpath("text", ".//div[h3]/div[1]//text()")
new.add_xpath("date", ".//abbr/text()")
new.add_xpath(
"reactions",
'.//a[contains(@href,"reaction/profile")]//text()')
new.add_value("post_id", response.meta["post_id"])
new.add_value("url", response.url)
yield new.load_item()
back = response.xpath(
'//div[contains(@id,"comment_replies_more_1")]/a/@href'
).extract()
if back:
self.logger.info("Back found, more nested comments")
back_page = response.urljoin(back[0])
yield scrapy.Request(
back_page,
callback=self.parse_reply,
priority=1000,
meta={
"reply_to": response.meta["reply_to"],
"flag": "back",
"url": response.meta["url"],
"index": response.meta["index"],
"post_id": response.meta["post_id"],
"group": response.meta["group"],
},
)
else:
next_reply = response.meta["url"]
self.logger.info(
"Nested comments crawl finished, heading to proper page: {}"
.format(response.meta["url"]))
yield scrapy.Request(
next_reply,
callback=self.parse_post,
meta={
"index": response.meta["index"] + 1,
"post_id": response.meta["post_id"],
"group": response.meta["group"],
},
)
elif response.meta["flag"] == "back":
# parse all comments
for reply in response.xpath(
'//div[contains(@id,"root")]/div/div/div[count(@id)=1 and contains("0123456789", substring(@id,1,1))]'
):
new = ItemLoader(item=CommentsItem(), selector=reply)
new.context["lang"] = self.lang
new.add_xpath("source", ".//h3/a/text()")
new.add_xpath("source_url", ".//h3/a/@href")
new.add_value("reply_to", response.meta["reply_to"])
new.add_xpath("text", ".//div[h3]/div[1]//text()")
new.add_xpath("date", ".//abbr/text()")
new.add_xpath(
"reactions",
'.//a[contains(@href,"reaction/profile")]//text()')
new.add_value("post_id", response.meta["post_id"])
new.add_value("url", response.url)
yield new.load_item()
# keep going backwards
back = response.xpath(
'//div[contains(@id,"comment_replies_more_1")]/a/@href'
).extract()
self.logger.info("Back found, more nested comments")
if back:
back_page = response.urljoin(back[0])
yield scrapy.Request(
back_page,
callback=self.parse_reply,
priority=1000,
meta={
"reply_to": response.meta["reply_to"],
"flag": "back",
"url": response.meta["url"],
"index": response.meta["index"],
"post_id": response.meta["post_id"],
"group": response.meta["group"],
},
)
else:
next_reply = response.meta["url"]
self.logger.info(
"Nested comments crawl finished, heading to home page: {}".
format(response.meta["url"]))
yield scrapy.Request(
next_reply,
callback=self.parse_post,
meta={
"index": response.meta["index"] + 1,
"post_id": response.meta["post_id"],
"group": response.meta["group"],
},
)
def parse_post(self, response):
"""
parse post does multiple things:
1) loads replied-to-comments page one-by-one (for DFS)
2) call parse_reply on the nested comments
3) adds simple (not-replied-to) comments
4) follows to new comment page
"""
# load replied-to comments pages
# select nested comment one-by-one matching with the index: response.meta['index']
# self.logger.info(response.url)
path = (
'.//div[string-length(@class) = 2 and count(@id)=1 and contains("0123456789", substring(@id,1,1)) and .//div[contains(@id,"comment_replies")]]'
+ "[" + str(response.meta["index"]) + "]")
# testpath = './/div[string-length(@class) = 2 and count(@id)=1 and contains("0123456789", substring(@id,1,1)) and .//div[contains(@id,"comment_replies")]][1]'
testpath = './/div[string-length(@class) = 2 and count(@id)=1 and contains("0123456789", substring(@id,1,1))]/@id'
bomb = 0
try:
if response.xpath(testpath) != []:
# self.logger.info(response.meta['testpath'])
# self.logger.info(response.xpath(testpath).extract())
if response.meta["testpath"] == response.xpath(
testpath).extract():
bomb = 1
except Exception:
self.logger.info("seems ok to continue")
try:
# self.logger.info(response.meta['post_id'])
post_id = response.meta["post_id"]
except Exception:
self.logger.info("single post")
testpath = response.xpath(testpath).extract()
# try:
# post_div = response.xpath('//div[contains(@data-ft,"top_level_post_id")]')
# many_features = post_div.xpath('./@data-ft').get()
# except Exception:
# many_features = ''
group_flag = response.meta[
"group"] if "group" in response.meta else None
if bomb == 0:
for reply in response.xpath(path):
source = reply.xpath(".//h3/a/text()").extract()
answer = reply.xpath(
'.//a[contains(@href,"repl")]/@href').extract()
ans = response.urljoin(answer[::-1][0])
self.logger.info("{} nested comment".format(
str(response.meta["index"])))
yield scrapy.Request(
ans,
callback=self.parse_reply,
priority=1000,
meta={
"reply_to": source,
"url": response.url,
"index": response.meta["index"],
"flag": "init",
"post_id": response.meta["post_id"],
"group": group_flag,
},
)
# load regular comments
if not response.xpath(path): # prevents from exec
path2 = './/div[string-length(@class) = 2 and count(@id)=1 and contains("0123456789", substring(@id,1,1)) and not(.//div[contains(@id,"comment_replies")])]'
for i, reply in enumerate(response.xpath(path2)):
self.logger.info("{} regular comment".format(i + 1))
new = ItemLoader(item=CommentsItem(), selector=reply)
new.context["lang"] = self.lang
new.add_xpath("source", ".//h3/a/text()")
new.add_xpath("source_url", ".//h3/a/@href")
new.add_xpath("text", ".//div[h3]/div[1]//text()")
new.add_xpath("date", ".//abbr/text()")
new.add_xpath(
"reactions",
'.//a[contains(@href,"reaction/profile")]//text()')
new.add_value("post_id", post_id)
new.add_value("url", response.url)
yield new.load_item()
# new comment page
if not response.xpath(path):
# for groups
next_xpath = './/div[contains(@id,"see_next")]'
prev_xpath = './/div[contains(@id,"see_prev")]'
if not response.xpath(next_xpath) or group_flag == 1:
for next_page in response.xpath(prev_xpath):
new_page = next_page.xpath(".//@href").extract()
new_page = response.urljoin(new_page[0])
self.logger.info(
"New page to be crawled {}".format(new_page))
yield scrapy.Request(
new_page,
callback=self.parse_post,
meta={
"index": 1,
"post_id": post_id,
"testpath": testpath,
"group": 1,
},
)
else:
for next_page in response.xpath(next_xpath):
new_page = next_page.xpath(".//@href").extract()
new_page = response.urljoin(new_page[0])
self.logger.info(
"New page to be crawled {}".format(new_page))
yield scrapy.Request(
new_page,
callback=self.parse_post,
meta={
"index": 1,
"post_id": post_id,
"testpath": testpath,
"group": group_flag,
},
)
def parse_reply(self, response):
'''
parse reply to comments, root comment is added if flag
'''
# from scrapy.utils.response import open_in_browser
# open_in_browser(response)
if response.meta['flag'] == 'init':
#parse root comment
for root in response.xpath(
'//div[contains(@id,"root")]/div/div/div[count(@id)!=1 and contains("0123456789", substring(@id,1,1))]'
):
new = ItemLoader(item=CommentsItem(), selector=root)
new.context['lang'] = self.lang
new.add_xpath('source', './/h3/a/text()')
new.add_xpath('source_url', './/h3/a/@href')
new.add_value('reply_to', 'ROOT')
new.add_xpath('text', './/div[1]//text()')
new.add_xpath('date', './/abbr/text()')
new.add_xpath(
'reactions',
'.//a[contains(@href,"reaction/profile")]//text()')
new.add_value('url', response.url)
#response --> reply/root
"""
PROFILE REACTIONS SECTION (REPEAT SEE LINE 176 )
the only difference is that, when getting the item temporarily
the selector is the root instead of the reply, (it matches the for loop)
"""
#profile = response.xpath(".//h3/a/@href")
#profile = response.urljoin(profile[0].extract())
profile = "https://mbasic.facebook.com" + new.get_collected_values(
'source_url')[0]
print('profile', profile)
#print('new item', new.get_collected_values('name'))
item = new.load_item()
check = 0
if profile:
check += 1
yield scrapy.Request(profile,
callback=self.parse_profile,
meta={'item': item})
#reactions = new.get_value('reactions')
#print("reactions",reactions)
temp = ItemLoader(item=CommentsItem(), selector=root)
temp.context['lang'] = self.lang
temp.add_xpath(
'reactions',
'.//a[contains(@href,"reaction/profile")]/@href')
reactions = temp.get_collected_values('reactions')
if reactions:
check += 1
reactions = "https://mbasic.facebook.com" + temp.get_collected_values(
'reactions')[0]
temp = 0
yield scrapy.Request(reactions,
callback=self.parse_reactions,
meta={'item': item})
if check == 0:
yield item
#parse all replies in the page
for reply in response.xpath(
'//div[contains(@id,"root")]/div/div/div[count(@id)=1 and contains("0123456789", substring(@id,1,1))]'
):
new = ItemLoader(item=CommentsItem(), selector=reply)
new.context['lang'] = self.lang
new.add_xpath('source', './/h3/a/text()')
new.add_xpath('source_url', './/h3/a/@href')
new.add_value('reply_to', response.meta['reply_to'])
new.add_xpath('text', './/div[h3]/div[1]//text()')
new.add_xpath('date', './/abbr/text()')
new.add_xpath(
'reactions',
'.//a[contains(@href,"reaction/profile")]//text()')
new.add_value('url', response.url)
"""
PROFILE REACTIONS SECTION SECTION (REPEAT SEE LINE 176)
"""
#profile = response.xpath(".//h3/a/@href")
#profile = response.urljoin(profile[0].extract())
profile = "https://mbasic.facebook.com" + new.get_collected_values(
'source_url')[0]
#print('new item', new.get_collected_values('name'))
item = new.load_item()
check = 0
if profile:
check += 1
yield scrapy.Request(profile,
callback=self.parse_profile,
meta={'item': item})
temp = ItemLoader(item=CommentsItem(), selector=reply)
temp.context['lang'] = self.lang
temp.add_xpath(
'reactions',
'.//a[contains(@href,"reaction/profile")]/@href')
reactions = temp.get_collected_values('reactions')
if reactions:
check += 1
reactions = "https://mbasic.facebook.com" + temp.get_collected_values(
'reactions')[0]
temp = 0
yield scrapy.Request(reactions,
callback=self.parse_reactions,
meta={'item': item})
if check == 0:
yield item
back = response.xpath(
'//div[contains(@id,"comment_replies_more_1")]/a/@href'
).extract()
if back:
self.logger.info('Back found, more nested comments')
back_page = response.urljoin(back[0])
yield scrapy.Request(back_page,
callback=self.parse_reply,
priority=1000,
meta={
'reply_to': response.meta['reply_to'],
'flag': 'back',
'url': response.meta['url'],
'index': response.meta['index'],
'group': response.meta['group']
})
else:
next_reply = response.meta['url']
self.logger.info(
'Nested comments crawl finished, heading to proper page: {}'
.format(response.meta['url']))
yield scrapy.Request(next_reply,
callback=self.parse_post,
meta={
'index': response.meta['index'] + 1,
'group': response.meta['group']
})
elif response.meta['flag'] == 'back':
"""
adds random time pauses to prevent blocking
DOWNSIDE: the algorithm will go slower, but still
runs pretty quickly
the greater the length of time, the more
likely you'll go undetected, but if you're using a large amount
of data, this may be unreasonable
"""
#print("did we make it")
r = randrange(0, 20)
time.sleep(r)
#parse all comments
for reply in response.xpath(
'//div[contains(@id,"root")]/div/div/div[count(@id)=1 and contains("0123456789", substring(@id,1,1))]'
):
#print("reply")
new = ItemLoader(item=CommentsItem(), selector=reply)
new.context['lang'] = self.lang
new.add_xpath('source', './/h3/a/text()')
new.add_xpath('source_url', './/h3/a/@href')
new.add_value('reply_to', response.meta['reply_to'])
new.add_xpath('text', './/div[h3]/div[1]//text()')
new.add_xpath('date', './/abbr/text()')
new.add_xpath(
'reactions',
'.//a[contains(@href,"reaction/profile")]//text()')
new.add_value('url', response.url)
"""
SECTION (REPEAT SEE LINE 176)
"""
profile = "https://mbasic.facebook.com" + new.get_collected_values(
'source_url')[0]
#profile = response.xpath(".//h3/a/@href")
#profile = response.urljoin(profile[0].extract())
#print('profile', profile)
#print('new item', new.get_collected_values('name'))
check = 0
item = new.load_item()
if profile:
check += 1
print(1)
yield scrapy.Request(profile,
callback=self.parse_profile,
meta={'item': item})
#response --> reply/root
#print("before ", item)
temp = ItemLoader(item=CommentsItem(), selector=reply)
temp.context['lang'] = self.lang
temp.add_xpath(
'reactions',
'.//a[contains(@href,"reaction/profile")]/@href')
reactions = temp.get_collected_values('reactions')
if reactions:
check += 1
reactions = "https://mbasic.facebook.com" + temp.get_collected_values(
'reactions')[0]
temp = 0
print(2)
yield scrapy.Request(reactions,
callback=self.parse_reactions,
meta={'item': item})
if check == 0:
print(3)
yield item
#print("after ", item)
#keep going backwards
back = response.xpath(
'//div[contains(@id,"comment_replies_more_1")]/a/@href'
).extract()
self.logger.info('Back found, more nested comments')
if back:
back_page = response.urljoin(back[0])
yield scrapy.Request(back_page,
callback=self.parse_reply,
priority=1000,
meta={
'reply_to': response.meta['reply_to'],
'flag': 'back',
'url': response.meta['url'],
'index': response.meta['index'],
'group': response.meta['group']
})
else:
next_reply = response.meta['url']
self.logger.info(
'Nested comments crawl finished, heading to home page: {}'.
format(response.meta['url']))
yield scrapy.Request(next_reply,
callback=self.parse_post,
meta={
'index': response.meta['index'] + 1,
'group': response.meta['group']
})
def parse_post(self, response):
'''
parse post does multiple things:
1) loads replied-to-comments page one-by-one (for DFS)
2) call parse_reply on the nested comments
3) adds simple (not-replied-to) comments
4) follows to new comment page
'''
#load replied-to comments pages
#select nested comment one-by-one matching with the index: response.meta['index']
path = './/div[string-length(@class) = 2 and count(@id)=1 and contains("0123456789", substring(@id,1,1)) and .//div[contains(@id,"comment_replies")]]' + '[' + str(
response.meta['index']) + ']'
group_flag = response.meta[
'group'] if 'group' in response.meta else None
for reply in response.xpath(path):
source = reply.xpath('.//h3/a/text()').extract()
answer = reply.xpath(
'.//a[contains(@href,"repl")]/@href').extract()
ans = response.urljoin(answer[::-1][0])
self.logger.info('{} nested comment'.format(
str(response.meta['index'])))
yield scrapy.Request(ans,
callback=self.parse_reply,
priority=1000,
meta={
'reply_to': source,
'url': response.url,
'index': response.meta['index'],
'flag': 'init',
'group': group_flag
})
#load regular comments
if not response.xpath(path): #prevents from exec
path2 = './/div[string-length(@class) = 2 and count(@id)=1 and contains("0123456789", substring(@id,1,1)) and not(.//div[contains(@id,"comment_replies")])]'
for i, reply in enumerate(response.xpath(path2)):
self.logger.info('{} regular comment'.format(i + 1))
new = ItemLoader(item=CommentsItem(), selector=reply)
new.context['lang'] = self.lang
new.add_xpath('source', './/h3/a/text()')
new.add_xpath('source_url', './/h3/a/@href')
new.add_xpath('text', './/div[h3]/div[1]//text()')
new.add_xpath('date', './/abbr/text()')
new.add_xpath(
'reactions',
'.//a[contains(@href,"reaction/profile")]//text()')
new.add_value('url', response.url)
"""
PROFILE REACTIONS SECTION
adds functionality for adding profile and specific reaction data
gets the profile url, creates a new item
if the profile exists, add info to new item and increment 'check'
to signal that new information has been added to the item
and it's already been yielded
repeat this process for reactions
"""
#profile = response.xpath(".//h3/a/@href")
#profile = response.urljoin(profile[0].extract())
profile = "https://mbasic.facebook.com" + new.get_collected_values(
'source_url')[0]
#print('profile', profile)
#print('new item', new.get_collected_values('name'))
item = new.load_item()
check = 0
if profile:
check += 1
yield scrapy.Request(profile,
callback=self.parse_profile,
meta={'item': item})
temp = ItemLoader(item=CommentsItem(), selector=reply)
temp.context['lang'] = self.lang
temp.add_xpath(
'reactions',
'.//a[contains(@href,"reaction/profile")]/@href')
reactions = temp.get_collected_values('reactions')
if reactions:
check += 1
reactions = "https://mbasic.facebook.com" + temp.get_collected_values(
'reactions')[0]
temp = 0
yield scrapy.Request(reactions,
callback=self.parse_reactions,
meta={'item': item})
if check == 0:
yield item
#new comment page
if not response.xpath(path):
#for groups
next_xpath = './/div[contains(@id,"see_next")]'
prev_xpath = './/div[contains(@id,"see_prev")]'
if not response.xpath(next_xpath) or group_flag == 1:
for next_page in response.xpath(prev_xpath):
new_page = next_page.xpath('.//@href').extract()
new_page = response.urljoin(new_page[0])
self.logger.info(
'New page to be crawled {}'.format(new_page))
yield scrapy.Request(new_page,
callback=self.parse_post,
meta={
'index': 1,
'group': 1
})
else:
for next_page in response.xpath(next_xpath):
new_page = next_page.xpath('.//@href').extract()
new_page = response.urljoin(new_page[0])
self.logger.info(
'New page to be crawled {}'.format(new_page))
yield scrapy.Request(new_page,
callback=self.parse_post,
meta={
'index': 1,
'group': group_flag
})
