Lxml error "IOError: Error reading file" while parsing facebook mobile in python script scraper
I am using a modified script from facebook post with python post :
#!/usr/bin/python2 -u
# -*- coding: utf8 -*-
facebook_email = "YOUR_MAIL@DOMAIN.TLD"
facebook_passwd = "YOUR_PASSWORD"
import cookielib, urllib2, urllib, time, sys
from lxml import etree
jar = cookielib.CookieJar()
cookie = urllib2.HTTPCookieProcessor(jar)
opener = urllib2.build_opener(cookie)
headers = {
"User-Agent" : "Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A293 Safari/6531.22.7",
"Accept" : "text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,text/png,*/*;q=0.5",
"Accept-Language" : "en-us,en;q=0.5",
"Accept-Charset" : "utf-8",
"Content-type": "application/x-www-form-urlencoded",
"Host": "m.facebook.com"
}
try:
params = urllib.urlencode({'email':facebook_email,'pass':facebook_passwd,'login':'Log+In'})
req = urllib2.Request('http://m.facebook.com/login.php?m=m&refsrc=m.facebook.com%2F', params, headers)
res = opener.open(req)
html = res.read()
except urllib2.HTTPError, e:
print e.msg
except urllib2.URLError, e:
print e.reason[1]
def fetch(url):
req = urllib2.Request(url,None,headers)
res = opener.open(req)
return res.read()
body = unicode(fetch("http://www.facebook.com/photo.php?fbid=404284859586659&set=a.355112834503862.104278.354259211255891&type=1"), errors='ignore')
tree = etree.parse(body)
r = tree.xpath('/see_prev')
print r.text
Problems arise when executing the code:
$ ./facebook_fetch_coms.py
Traceback (most recent call last):
File "./facebook_fetch_coms_classic_test.py", line 42, in <module>
tree = etree.parse(body)
File "lxml.etree.pyx", line 2957, in lxml.etree.parse (src/lxml/lxml.etree.c:56230)
File "parser.pxi", line 1533, in lxml.etree._parseDocument (src/lxml/lxml.etree.c:82313)
File "parser.pxi", line 1562, in lxml.etree._parseDocumentFromURL (src/lxml/lxml.etree.c:82606)
File "parser.pxi", line 1462, in lxml.etree._parseDocFromFile (src/lxml/lxml.etree.c:81645)
File "parser.pxi", line 1002, in lxml.etree._BaseParser._parseDocFromFile (src/lxml/lxml.etree.c:78554)
File "parser.pxi", line 569, in lxml.etree._ParserContext._handleParseResultDoc (src/lxml/lxml.etree.c:74498)
File "parser.pxi", line 650, in lxml.etree._handleParseResult (src/lxml/lxml.etree.c:75389)
File "parser.pxi", line 588, in lxml.etree._raiseParseError (src/lxml/lxml.etree.c:74691)
IOError: Error reading file '<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//WAPFORUM//DTD XHTML Mobile 1.0//EN" "http://www.wapforum.org/DTD/xhtml-mobile10.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"><head><title>Facebook</title><meta name="description" content="Facebook helps you connect and share with the people in your life."
The goal is to first get the link with id=see_prev
using lxml
, and then use a while loop to open all comments, to finally get all the messages in the file. Any help would be much appreciated!
Edit : I am using Python 2.7.2 on archlinux x86_64 and lxml 2.3.3.
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It's your problem:
tree = etree.parse(body)
The documentation says " source
is the name of a file or file that contains XML data." You provided a string, so lxml takes your HTTP response body text as the name of the file you want to open. There is no such file, so you get IOError
.
The error message you receive even says "Error reading file" and then gives your XML string as the name of the file it is trying to read, which is a big big hint of what is going on.
You probably want etree.XML()
one that takes input from a string. Or you can just make tree = etree.parse(res)
it read directly from the HTTP request into lxml (the result opener.open()
is a file-like object, and etree.parse()
should be totally happy to consume it).
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