LXML错误“IO错误:读取文件错误”在Python刮刀脚本
问题描述:
我使用修改后的脚本Logging into facebook with python后解析Facebook手机时:LXML错误“IO错误:读取文件错误”在Python刮刀脚本
#!/usr/bin/python2 -u
# -*- coding: utf8 -*-
facebook_email = "[email protected]"
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
当我执行的代码,会出现问题:
$ ./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."
的目标是第一个获得与id=see_prev
的联系与lxml
,然后用while循环打开所有的意见,最终获取文件中的所有信息。任何帮助将非常感激!
编辑: 我在archlinux x86_64和lxml 2.3.3上使用Python 2.7.2。
答
这是你的问题:
tree = etree.parse(body)
的documentation说: “source
是包含XML数据的文件名或文件对象。”您所提供的字符串,所以LXML正在你的HTTP响应体的文本作为名称要打开的文件的。没有这样的文件存在,所以你得到一个IOError
。
你甚至会说错误消息“Error reading file”,然后给出你的XML字符串作为它试图读取的文件的名字,这是一个很大的暗示关于正在发生的事情。
你可能想etree.XML()
,这需要从字符串输入。或者你可以只是做tree = etree.parse(res)
直接到lxml去HTTP请求(的opener.open()
结果是一个类似文件的对象,并etree.parse()
应该完全乐于使用它)来读取。
我删除'解析()'支持HTML的'()',它工作得更好,谢谢。 – 2012-03-07 02:33:50