如何使用mechanize输入用户名和密码

Question

我正在尝试使用 mechanize 抓取需要我登录的网站。这是我的代码的开始。

#!/usr/bin/python

#scrape the admissions part of SAFE

import mechanize
import cookielib
from BeautifulSoup import BeautifulSoup
import html2text

# Browser
br = mechanize.Browser()

# Cookie Jar
cj = cookielib.LWPCookieJar()
br.set_cookiejar(cj)

# Browser options
br.set_handle_equiv(True)
br.set_handle_gzip(True)
br.set_handle_redirect(True)
br.set_handle_referer(True)
br.set_handle_robots(False)
br.set_handle_refresh(mechanize._http.HTTPRefreshProcessor(), max_time=1)

br.addheaders = [('User-agent', 'Chrome')]

# The site we will navigate into, handling it's session
br.open('https://url')

# View available forms
for f in br.forms():
    print f

这给了我

<POST https://userstuff application/x-www-form-urlencoded
  <HiddenControl(lt=LT-227363-Ja4QpRvdxrbQF0nb7XcR2jQDydH43s) (readonly)>
  <HiddenControl(execution=e1s1) (readonly)>
  <HiddenControl(_eventId=submit) (readonly)>
  <TextControl(username=)>
  <PasswordControl(password=)>
  <SubmitButtonControl(submit=) (readonly)>
  <CheckboxControl(warn=[on])>>

我现在如何输入用户名和密码？

我试过了

# Select the first (index zero) form 
br.select_form(nr=0)

# User credentials
br.form['username'] = 'username'
br.form['password'] = 'password'

# Login
br.submit()

但这似乎不起作用。

Answer 1

最后这对我有用

#!/usr/bin/python

#scraper

import mechanize
import cookielib
from BeautifulSoup import BeautifulSoup
import html2text

# Browser
br = mechanize.Browser()

# Cookie Jar
cj = cookielib.LWPCookieJar()
br.set_cookiejar(cj)

# Browser options
br.set_handle_equiv(True)
br.set_handle_gzip(True)
br.set_handle_redirect(True)
br.set_handle_referer(True)
br.set_handle_robots(False)
br.set_handle_refresh(mechanize._http.HTTPRefreshProcessor(), max_time=1)

br.addheaders = [('User-agent', 'Chrome')]

# The site we will navigate into, handling it's session
br.open('url1')

# View available forms
for f in br.forms():
    if f.attrs['id'] == 'fm1':
        br.form = f
        break

# User credentials
br.form['username'] = 'password'
br.form['password'] = 'username'

# Login
br.submit()

#Now we need to confirm again

br.open('https://url2')

# Select the first (index zero) form 
br.select_form(nr=0)

# Login
br.submit()

print(br.open('https:url2').read())

Answer 2

我会查看 html 表单，而不是 mechanize 提供给您的内容。以下是我过去尝试填写的表格示例。

<input type="text" name="user_key" value="">
<input type="password" name="user_password">

下面是我使用上面的表格登录该网站的代码

# Browser
br = mechanize.Browser()

# Cookie Jar
cj = cookielib.LWPCookieJar()
br.set_cookiejar(cj)

# Browser options
br.set_handle_equiv(True)
br.set_handle_gzip(True)
br.set_handle_redirect(True)
br.set_handle_refresh(False) 
br.set_handle_referer(True)
br.set_handle_robots(False)

# Follows refresh 0 but not hangs on refresh > 0
br.set_handle_refresh(mechanize._http.HTTPRefreshProcessor(), max_time=1)

# User-Agent
br.addheaders = [('User-agent', 'Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.1) Gecko/2008071615 Fedora/3.0.1-1.fc9 Firefox/3.0.1')]

# The site we will navigate into, handling it's session
br.open('https://www.website.com/login')

#select the first form
br.select_form(nr=0)

#user credentials
br['user_key'] = 'myusername@gmail.com'
br['user_password'] = 'mypassword'

# Login
br.submit()

link = 'http://www.website.com/url_i_want_to_scrape'

br.open(link)
response = br.response().read()
print response

您的问题可能是您选择了错误的表单，给出了不正确的字段名称