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微信爬虫

爬取微信公众号文章的爬虫，此版本基于bowenpay的wechat-spider的开源进行改造，再此表示感谢！

功能介绍

系统架构

基于python2.7，框架使用Django，划分为

  • manage.py 管理平台
  • scheduler.py 调度任务
  • downloader.py 下载任务
  • extractor.py 渲染及html处理
  • processor.py 数据入库处理

1）内部通过redis进行消息驱动，进行任务流程处理，其中downloader.py和extractor.py可启动多个，加快下载和处理速度，PS：频率太高会被反爬虫封IP地址。 2）文章发布使用kafka消息中间件，订阅者可自行订阅文章内容，详细内容将在api接口部分内说明。

中间件说明：

  • 数据库：mysql（ version >= 5.1 ，建议版本 5.7.x )
  • �缓存服务（消息）：redis ( version >= 2.6 建议版本 3.2.x）
  • 消息订阅： kafka （ version >= 2.12-1.1.1 建议版本 2.12-1.1.1)

三方依赖

Django==1.8.1
MySQL-python==1.2.5
requests==2.9.1
lxml==3.4.4
hiredis==0.2.0
redis==2.10.3
oss2==2.0.5
selenium==3.141.0
PyVirtualDisplay==0.1.5
python-dateutil==2.5.0
beautifulsoup4==4.4.1
ConcurrentLogHandler==0.9.1
kafka-python==1.4.6
html5lib==1.0b8

界面预览

1） 展示公众号列表

订阅指定公众号

2） 要爬取的文章关键字列表

订阅指定关键字，谨慎使用

3） 要爬取的热点文章关键字列表

可以直接进行热点文章链接添加

4） 查看文章，并进行发布

安装

1）python环境, 检查python的版本，是否为2.7.x，如果不是，安装2.7.6。

如果是centos 6.x，升级python2.6到python2.7，参考教程 https://cloud.tencent.com/developer/article/1140994

如果是centos 7.x，默认就是python2.7,不用升级

如果是mac osx，可以使用virtualenv，安装python2.7

2）安装依赖包, clone代码

  • 安装Mysql-python依赖
yum install python-devel mysql-devel gcc
  • 安装lxml依赖，目前已使用容错性更好的html5lib库，此步骤可跳过
yum install libxslt-devel libxml2-devel
  • 安装浏览器环境 selenium依赖.(firefox升级到最新版本，60.x以上版本,需要与geckodriver匹配)
yum install xorg-x11-server-Xvfb
yum upgrade glib2 # 确保glib2版本大于2.42.2，否则firefox启动会报错
yum install firefox # centos下安装最新的firefox版本

clone代码,安装依赖python库

$ git clone https://github.com/shenantonio/wechat-spider.git
$ cd wechat-spider
$ pip install -r requirements.txt

问题说明：

如果install出现问题，pip版本过低等问题，建议执行：
python -m pip install --upgrade --force pip
如pip已经不存在，可进行安装
wget https://bootstrap.pypa.io/ez_setup.py
python ez_setup.py install
easy_install pip

如出现
Collecting Django==1.8.1 (from -r requirements.txt (line 1))
/usr/local/lib/python2.7/site-packages/pip/_vendor/urllib3/util/ssl_.py:354: SNIMissingWarning: An HTTPS request has been made, but the SNI (Server Name Indication) extension to TLS is not available on this platform. This may cause the server to present an incorrect TLS certificate, which can cause validation failures. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/advanced-usage.html#ssl-warnings
  SNIMissingWarning

pip install pyopenssl ndg-httpsclient pyasn1
  1. 创建mysql数据库

创建数据库wechatspider，默认采用utf8编码。（如果系统支持，可以采用utf8mb4，以兼容emoji字符）

mysql> CREATE DATABASE `wechatspider` CHARACTER SET utf8;
  1. 安装和运行Redis(如已具备，可跳过)
$ wget http://download.redis.io/releases/redis-2.8.3.tar.gz
$ tar xzvf redis-2.8.3.tar.gz
$ cd redis-2.8.3
$ make
$ make install
$ redis-server
  1. 更新配置文件local_settings

在 wechatspider 目录下,添加 local_settings.py 文件,配置如下:

# -*- coding: utf-8 -*-

SECRET_KEY="xxxxxx"

CRAWLER_DEBUG = True

# aliyun oss2, 可以将图片和视频存储到阿里云，也可以选择不存储，爬取速度会更快。 默认不存储。
#OSS2_ENABLE = True
#OSS2_CONFIG = {
#    "ACCESS_KEY_ID": "XXXXXXXXXXXXXX",
#    "ACCESS_KEY_SECRET": "YYYYYYYYYYYYYYYYYYYYYY",
#    "ENDPOINT": "",
#    "BUCKET_DOMAIN": "oss-cn-hangzhou.aliyuncs.com",
#    "BUCKET_NAME": "XXXXX",
#    "IMAGES_PATH": "images/",
#    "VIDEOS_PATH": "videos/",
#    "CDN_DOMAIN": "XXXXXX.oss-cn-hangzhou.aliyuncs.com"
#}
# mysql 数据库配置
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'HOST': '127.0.0.1',
        'NAME': 'wechatspider',
        'USER': 'root',
        'PASSWORD': '',
        'OPTIONS':{
            'charset': 'utf8mb4',
        },
    }
}
# redis配置,用于消息队列和k-v存储
REDIS_OPTIONS = {
    'host': 'localhost',
    'port': 6379,
    'password': '',
    'db': 4
}

# �图片下载服务�URL
IMAGE_SERVER_URL = 'http://localhost:8001/wechat/image/download/'

# kafka配置
KAFKA_ENABLE = True
KAFKA_CONFIG = {
    "bootstrap_servers": "localhost:9092",
    "topic": "wechat_topic",
    "client_id": "wechatspider"
}
  1. 初始化表
# 创建日志目录,与解压后wechat-spider目录�下

$ mkdir logs
$ python manage.py migrate

7）启动网站

python manage.py runserver 0.0.0.0:8001

如出现：
"Can't initialize character set utf8mb4 (path: /usr/share/mysql/charsets/)")

修改/usr/share/mysql/charsets/Index.xml 把 <charset name="utf8"> 修改为 <charset name="utf8mb4">

访问 http://localhost:8001/。

  1. 创建超级管理员账号,访问后台，并配置要爬取的公众号和关键字
python manage.py createsuperuser

8）启动爬虫

$ python bin/scheduler.py
$ python bin/downloader.py
$ python bin/extractor.py
$ python bin/processor.py

以上步骤执行成功，并能爬取文章后。可以参考以下部分配置生产环境。


如果服务器没有安装桌面系统，将出现如下错误，请安装geckodriver

Traceback (most recent call last):
  File "bin/downloader.py", line 96, in <module>
    downloader.run()
  File "bin/downloader.py", line 77, in run
    with SeleniumDownloaderBackend(proxy=proxy) as browser:
  File "/home/wechat/wechat-spider/wechat/downloaders.py", line 42, in __enter__
    self.browser = self.get_browser(self.proxy)
  File "/home/wechat/wechat-spider/wechat/downloaders.py", line 96, in get_browser
    browser = webdriver.Firefox(firefox_profile=fp)
  File "/usr/local/lib/python2.7/site-packages/selenium/webdriver/firefox/webdriver.py", line 164, in __init__
    self.service.start()
  File "/usr/local/lib/python2.7/site-packages/selenium/webdriver/common/service.py", line 83, in start
    os.path.basename(self.path), self.start_error_message)
selenium.common.exceptions.WebDriverException: Message: 'geckodriver' executable needs to be in PATH.

Message: 'geckodriver' executable needs to be in PATH.

Traceback (most recent call last):
  File "bin/downloader.py", line 96, in <module>
    downloader.run()
  File "bin/downloader.py", line 77, in run
    with SeleniumDownloaderBackend(proxy=proxy) as browser:
  File "/home/wechat/wechat-spider/wechat/downloaders.py", line 42, in __enter__
    self.browser = self.get_browser(self.proxy)
  File "/home/wechat/wechat-spider/wechat/downloaders.py", line 96, in get_browser
    browser = webdriver.Firefox(firefox_profile=fp)
  File "/usr/local/lib/python2.7/site-packages/selenium/webdriver/firefox/webdriver.py", line 164, in __init__
    self.service.start()
  File "/usr/local/lib/python2.7/site-packages/selenium/webdriver/common/service.py", line 83, in start
    os.path.basename(self.path), self.start_error_message)
selenium.common.exceptions.WebDriverException: Message: 'geckodriver' executable needs to be in PATH.


geckodriver 安装
请选用此版本：https://github.com/mozilla/geckodriver/releases/tag/v0.22.0

wget https://github.com/mozilla/geckodriver/releases/download/v0.22.0/geckodriver-v0.22.0-linux64.tar.gz
tar xvfz geckodriver-v0.22.0-linux64.tar.gz
cp geckodriver /usr/local/bin/.
ln -s /usr/local/bin/geckodriver /usr/bin/geckodriver

supervisor的安装，可灵活管理进程

安装supervisor

pip install supervisor==3.4.0

测试安装是否成功

echo_supervisord_conf

; Sample supervisor config file.
;
; For more information on the config file, please see:
; http://supervisord.org/configuration.html
;
; Notes:
;  - Shell expansion ("~" or "$HOME") is not supported.  Environment
;    variables can be expanded using this syntax: "%(ENV_HOME)s".
;  - Quotes around values are not supported, except in the case of
;    the environment= options as shown below.
;  - Comments must have a leading space: "a=b ;comment" not "a=b;comment".
;  - Command will be truncated if it looks like a config file comment, e.g.
;    "command=bash -c 'foo ; bar'" will truncate to "command=bash -c 'foo ".

建立文件夹,把应用的配置文件单独放置

mkdir -p /opt/app/supervisor
mkdir -p /opt/app/supervisor/conf.d

创建默认的配置文件,并修改配置

echo_supervisord_conf >/opt/app/supervisor/supervisord.conf

vi /opt/app/supervisor/supervisord.conf

[inet_http_server] ; inet (TCP) server disabled by default
port=0.0.0.0:9001 ; (ip_address:port specifier, *:port for all iface)
username=user ; (default is no username (open server))
password=123 ; (default is no password (open server))

[include]
files = ./conf.d/*.conf

设定supervisor启动文件

vi /etc/init.d/supervisord

增加如下内容：

#! /usr/bin/env bash
# chkconfig: - 85 15

PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin

PROGNAME=supervisord

DAEMON=/usr/local/bin/$PROGNAME

CONFIG=/opt/app/supervisor/$PROGNAME.conf

PIDFILE=/tmp/$PROGNAME.pid

DESC="supervisord daemon"

SCRIPTNAME=/etc/init.d/$PROGNAME

# Gracefully exit if the package has been removed.

test -x $DAEMON || exit 0


start()

{

echo -n "Starting $DESC: $PROGNAME"

$DAEMON -c $CONFIG

echo ".............start success"

}

stop()

{

echo "Stopping $DESC: $PROGNAME"

if [ -f "$PIDFILE" ];
then
supervisor_pid=$(cat $PIDFILE)
kill -15 $supervisor_pid
echo "......"
echo "stop success"
else
echo "$DESC: $PROGNAME is not Runing"
echo ".........................stop sucess"
fi
}

status()

{ statusport=`netstat -lntp|grep 9001|awk -F ' ' '{print $4}'|awk -F ':' '{print $2}'`

if [ -f "$PIDFILE" ];
then
supervisor_pid=$(cat $PIDFILE)
echo "$DESC: $PROGNAME is Runing pid=$supervisor_pid"
else
echo "$DESC: $PROGNAME is not Runing"
echo "please use command /etc/init.d/supervisord start Run the service"
fi
}

case "$1" in

start)

start

;;

stop)

stop

;;

restart)

stop

start

;;

status)

status

;;

*)

echo "Usage: $SCRIPTNAME {start|stop|restart}" >&2

exit 1

;;

esac

exit 0

# 增加执行权限
chmod a+x /etc/init.d/supervisord

�放入配置文件

cp /home/wechat/wechat-spider/supervisord.conf /opt/app/supervisor/conf.d/.

调整/opt/app/supervisor/conf.d/supervisord.conf中的启动路径

启动并观察进程


# 启动supervisord

rm--supervisord

supervisord -c /opt/app/supervisor/supervisord.conf

# 观察进程情况

ps -fe|grep python

root      8659     1  0 14:47 ?        00:00:00 /usr/local/bin/python /usr/local/bin/supervisord
wechat    8660  8659  0 14:47 ?        00:00:00 python /home/wechat/wechat-spider/manage.py runserver 0.0.0.0:8001
wechat    8661  8659  1 14:47 ?        00:00:00 python /home/wechat/wechat-spider/bin/downloader.py
wechat    8662  8659  1 14:47 ?        00:00:00 python /home/wechat/wechat-spider/bin/downloader.py
wechat    8663  8659  0 14:47 ?        00:00:00 python /home/wechat/wechat-spider/bin/processor.py
wechat    8664  8659  1 14:47 ?        00:00:00 python /home/wechat/wechat-spider/bin/extractor.py
wechat    8665  8659  1 14:47 ?        00:00:00 python /home/wechat/wechat-spider/bin/extractor.py
wechat    8666  8659  0 14:47 ?        00:00:00 python /home/wechat/wechat-spider/bin/scheduler.py
wechat    8699  8660  1 14:47 ?        00:00:00 /usr/local/bin/python /home/wechat/wechat-spider/manage.py runserver 0.0.0.0:8001

进程单个管理

# 启动全部程序
supervisorctl -u 用户名 -p 密码 start all
# 停止全部程序
supervisorctl -u 用户名 -p 密码 stop all
# 启动/停止/重启 单个进程
supervisorctl -u 用户名 -p 密码 �start|stop|restart 程序名

程序名清单:
wechatspider    爬虫管理平台
wechatspider_scheduler   调度进程
wechatspider_downloader  下载进程
wechatspider_extractor   渲染处理进程
wechatspider_processor   数据落地进程

例如：supervisorctl -u admin -p admin123 start  wechatspider

通过web界面管理

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微信公众号爬虫

wechatspider.0fenbei.com/

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