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Download all posts from a Facebook page, in txt or csv
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#Written by Luca Tringali
# The code is described here:
# https://www.codice-sorgente.it/2018/08/facebook-scraping-scaricare-tutti-i-post-delle-pagine-facebook/
#Released under GNU GPL3
#USAGE: python3 ./scrapefb.py https://facebookpageurl/ ./ CSV
#The second argument is the output folder, the third one (in caps) is the format TXT or CSV
import urllib.request
import urllib.parse
import re
import html
import sys
import os
import json
import datetime
import time
from socket import timeout
useragent = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.47 Safari/537.36'
def geturl(thisurl):
global useragent
if thisurl == '':
return ''
req = urllib.request.Request(
thisurl,
data=None,
headers={
'User-Agent': useragent
}
)
thishtml = ""
try:
f = urllib.request.urlopen(req,timeout=300)
ft = f.read() #we should stop if this is taking too long
except:
ft = ""
try:
encoding = f.info().get_content_charset()
if encoding == None:
encoding = 'windows-1252'
thishtml = ft.decode(encoding)
except:
try:
thishtml = ft.decode('utf-8', 'backslashreplace')
except:
thishtml = str(ft)
try:
thishtml = html.unescape(thishtml)
except:
thishtml = ""
return thishtml
def scrapefacebook(mypage, output = "./", ascsv = False):
TOSELECT_FB = 'pages_reaction_units'
startposts = "{\"__html\":"
endposts = "]]"
maxresults = 300
towait = 10
lstart = '/pages_reaction_units/more/?page_id='
lending = '&cursor={"card_id":"videos","has_next_page":true}&surface=www_pages_home&unit_count='+str(maxresults)+'&referrer&dpr=1&__user=0&__a=1'
allhtml = geturl(mypage)
try:
start = mypage.index("https://")
end = mypage.index('/',start+8)
fbdomain = mypage[start:end]
indexes = [(m.start(0), m.end(0)) for m in re.finditer(TOSELECT_FB, allhtml[start+1:])]
start = indexes[0][0]
end = allhtml.index('"',start+1)
thislink = allhtml[start:end]
#estrapola page_id
#getting page ID from page source HTML
#https://it-it.facebook.com/pages_reaction_units/more/?page_id=286796408016028&cursor={"card_id":"videos","has_next_page":true}&surface=www_pages_home&unit_count=300&referrer&dpr=1&__user=0&__a=1
start = thislink.index("page_id=")
end = thislink.index('&',start+9)
pageid = thislink[start+8:end]
start = mypage.index("facebook.com")
pagename = mypage[start+12:]
pagename = re.sub(r'[^A-Za-z0-9]',"",pagename)
except:
fbdomain = ""
pageid = ""
fname = output + "fb_" + pagename + ".txt"
if ascsv:
fname = output + "fb_" + pagename + ".csv"
alllinks = []
linksfile = output + "fb_" + pagename + ".tmp"
if os.path.isfile(linksfile):
alllinks = [line.rstrip('\n') for line in open(linksfile, encoding='utf-8')]
timelineiter = 0
ripristino = False
active = True
while active:
link = fbdomain + lstart + pageid + lending
if timelineiter == 0 and len(alllinks)>0:
link = alllinks[len(alllinks)-1]
ripristino = True
with open(linksfile, "a", encoding='utf-8') as lfile:
lfile.write(link+'\n')
print(link)
newhtml = geturl(link)
try:
start = newhtml.index(startposts)
end = newhtml.index(endposts)
postshtml = newhtml[start:end]
#eliminazione caratteri unicode surrogati
#deleting unicode surrogates
postshtml = postshtml.encode("utf-8").decode('unicode-escape')
postshtml = re.sub(r'[\uD800-\uDFFF]',"",postshtml)
#dividi per data-utime e tieni solo quello che sta tra <p> e </p>
#splitting posts by their Unitx Time (data-utime) and keeping only text inside <p> </p> tags
postsarray = re.split('data-utime', postshtml)
timearray = []
for i in range(len(postsarray)):
try:
start = postsarray[i].index('"')
end = postsarray[i].index('"',start+2)
utime = postsarray[i][start:end]
utime = re.sub(r'[^0-9]',"",utime)
utimei = int(utime)
except:
utimei = 0
thistime = datetime.datetime.utcfromtimestamp(utimei).strftime('%Y-%m-%d %H:%M:%S')
timearray.append(thistime)
indexes = [(m.start(0), m.end(0)) for m in re.finditer('<p>(.*?)<\\\\/p>', postsarray[i])]
thispost = ""
for n in range(len(indexes)):
start = indexes[n][0]
end = indexes[n][1]
thispost = thispost + postsarray[i][start:end]
#pulisco i tag non necessari
#cleaning unnecessary tags
postsarray[i] = re.sub(r'<.*?>',"",thispost)
#tolgo gli slash non necessari
#cleaning unnecessary slashes
postsarray[i] = re.sub('\\\\/',"/",postsarray[i])
print(postsarray)
try:
maxresults = 8
start = newhtml.index('&cursor=')
end = newhtml.index("&unit_count=", start+1)
lending = newhtml[start:end]
#eliminazione caratteri unicode surrogati
#again, cleaning unicode surrogates
lending = lending.encode("utf-8").decode('unicode-escape')
lending = re.sub(r'[\uD800-\uDFFF]',"",lending)
lending = urllib.parse.unquote(lending)
lending = lending + '&unit_count='+str(maxresults)+'&dpr=1&__user=0&__a=1'
#https://it-it.facebook.com/pages_reaction_units/more/?page_id=286796408016028&cursor={"timeline_cursor":"timeline_unit:1:00000000001528624041:04611686018427387904:09223372036854775793:04611686018427387904","timeline_section_cursor":{},"has_next_page":true}&surface=www_pages_home&unit_count=8&dpr=1&__user=0&__a=1
except:
active = False
except:
postsarray = []
timearray = []
#salvo il risultato in un file: se è il primo ciclo creo il file, altrimenti aggiungo
#saving results in a file, creating a new one or appending to an existing one if needed
if fname != "":
postsfile = ""
for i in range(len(postsarray)):
if postsarray[i] != "":
if ascsv:
postsfile = postsfile + timearray[i] + "\t"
postsfile = postsfile + postsarray[i] + "\n"
if timelineiter == 0 and ripristino==False:
text_file = open(fname, "w", encoding='utf-8')
text_file.write(postsfile)
text_file.close()
else:
with open(fname, "a", encoding='utf-8') as myfile:
myfile.write(postsfile)
timelineiter = timelineiter +1
time.sleep(towait)
if __name__ == '__main__':
START_PAGE = "https://it-it.facebook.com/chiesapastafarianaitaliana/"
if len(sys.argv)>1:
START_PAGE = sys.argv[1]
if "facebook.com" in START_PAGE:
output = "./"
if len(sys.argv)>2:
output = sys.argv[2]
ascsv = False
if len(sys.argv)>3:
if sys.argv[3] == "CSV":
ascsv = True
scrapefacebook(START_PAGE, output, ascsv)
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