Scrapy爬取携程桂林问答

guilin.sql：

CREATE TABLE `guilin_ask` (
  `id` INT(11) NOT NULL AUTO_INCREMENT COMMENT '主键',
  `question` VARCHAR(255) DEFAULT NULL COMMENT '问题的标题',
  `full_question` VARCHAR(255) DEFAULT NULL COMMENT '问题的详情',
  `keyword` VARCHAR(255) DEFAULT NULL COMMENT '关键字',
  `ask_time` VARCHAR(255) DEFAULT NULL COMMENT '提问时间',
  `accept_answer` TEXT COMMENT '提问者采纳的答案',
  `recommend_answer` TEXT COMMENT '旅游推荐的答案',
  `agree_answer` TEXT COMMENT '赞同数最高的答案',
  PRIMARY KEY (`id`),
  UNIQUE KEY `question` (`question`)
) ENGINE=INNODB DEFAULT CHARSET=utf8 COMMENT='桂林_问答表'

guilin.py：

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

import scrapy
from scrapy import Request

from QuestionAndAnswer.items import QuestionandanswerItem
from pyquery import PyQuery as pq

class GuilinSpider(scrapy.Spider):
    name = 'guilin'
    allowed_domains = ['you.ctrip.com']

    def start_requests(self):
        # 重写start_requests方法
        ctrip_url = "http://you.ctrip.com/asks/search/?keywords=%e6%a1%82%e6%9e%97&type=2"
        # 携程~攻略~问答~桂林~已回答问题

        yield Request(ctrip_url, callback=self.list_page)

    def list_page(self, response):
        result = pq(response.text)
        # 调用pyquery.PyQuery
        result_list = result(".cf")
        # 问题列表
        question_urls = []
        # 问题链接列表
        for ask_url in result_list.items():
            question_urls.append(ask_url.attr("href"))
        while None in question_urls:
            question_urls.remove(None)
            # 去除None

        for url in question_urls:
            yield response.follow(url, callback=self.detail_page)

        result.make_links_absolute(base_url="http://you.ctrip.com/")
        # 把相对路径转换成绝对路径
        next_link = result(".nextpage")
        next_url = next_link.attr("href")
        # 下一页
        if next_url is not None:
            # 如果下一页不为空
            yield scrapy.Request(next_url, callback=self.list_page)

    def detail_page(self, response):
        detail = pq(response.text)
        question_frame = detail(".detailmain")
        # 问答框

        for i_item in question_frame.items():
            ask = QuestionandanswerItem()
            ask["question"] = i_item(".ask_title").text()
            ask["full_question"] = i_item("#host_asktext").text()
            ask["keyword"] = i_item(".asktag_oneline.cf").text()
            ask["ask_time"] = i_item(".ask_time").text().strip("发表于")
            ask["accept_answer"] = i_item(".bestanswer_con > div > p.answer_text").text()
            ask["recommend_answer"] = i_item(".youyouanswer_con > div > p.answer_text").text()
            ask["agree_answer"] = i_item("#replyboxid > ul > li:nth-child(1) > div > p.answer_text").text()
            yield ask

items.py：

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

# Define here the models for your scraped items
#
# See documentation in:
# https://doc.scrapy.org/en/latest/topics/items.html

import scrapy

class QuestionandanswerItem(scrapy.Item):
    # define the fields for your item here like:
    # name = scrapy.Field()

    question = scrapy.Field()
    # 问题的标题
    full_question = scrapy.Field()
    # 问题的详情
    keyword = scrapy.Field()
    # 关键字
    ask_time = scrapy.Field()
    # 提问时间
    accept_answer = scrapy.Field()
    # 提问者采纳的答案
    recommend_answer = scrapy.Field()
    # 旅游推荐的答案
    agree_answer = scrapy.Field()
    # 赞同数最高的答案

MySQLPipline.py：

from pymysql import connect

class MySQLPipeline(object):
    def __init__(self):
        self.connect = connect(
            host='192.168.1.108',
            port=3306,
            db='scrapy',
            user='root',
            passwd='Abcdef@123456',
            charset='utf8',
            use_unicode=True)
        # MySQL数据库
        self.cursor = self.connect.cursor()
        # 使用cursor()方法获取操作游标

    def process_item(self, item, spider):
        self.cursor.execute(
            """select * from guilin_ask WHERE question = %s""",
            item['question'])
        # 是否有重复问题
        repetition = self.cursor.fetchone()

        if repetition:
            pass
        # 丢弃

        else:
            self.cursor.execute(
                """insert into guilin_ask(
question, full_question, keyword, ask_time, accept_answer, recommend_answer, agree_answer) 
VALUE (%s, %s, %s, %s, %s, %s, %s)""",
                (item['question'],
                 item['full_question'],
                 item['keyword'],
                 item['ask_time'],
                 item['accept_answer'],
                 item['recommend_answer'],
                 item['agree_answer']
                 ))
            # 执行sql语句，item里面定义的字段和表字段一一对应
            self.connect.commit()
            # 提交
            return item
            # 返回item

    def close_spider(self, spider):
        self.cursor.close()
        # 关闭游标
        self.connect.close()
        # 关闭数据库连接