爬取搜狐新闻科技类

#-*-coding:utf-8-*-
# @Time :2021/4/22 7:08
# @Author:shuaichao
# @File :.py
# @Software: PyCharm
from bs4 import BeautifulSoup        #网页解析，获悉数据.231
import re                            #正则表达式
import urllib.request,urllib.error   #制定URL，获取网页数据
import pymysql
import traceback
import time
import requests
import json
def askUrl(url):
    head={
        # "Cookie": "pgv_pvid = 2445437098;RK = IWJFENCj / 2;ptcz = 0dc31e9c452a0701259378ea4d93881f2a4d4ab7d29d637d6da1b0b24d857f4c;Qs_lvt_323937 = 1588214559;Qs_pv_323937 = 3783410537228747000;pgv_pvi = 5491528704;eas_sid = t196y05258V4B6g478m7t073P2;luin = o0775929901;lskey = 000100001264ed0bece633b72b741fb54e5137a729bfa3647db8a18c0ee96579fd05aff03206e6cafbeb0f88",
        # "Connection": "keep-alive",
        # "Cache-Control": "max-age = 0",
        # "Accept-Language": "zh - CN, zh;q = 0.9",
        # "Accept-Encoding": "gzip, deflate, br",
        # "Accept": "text / html, application / xhtml + xml, application / xml;q = 0.9, image / webp, image / apng, * / *;q = 0.8",
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36 Edg/89.0.774.57"
    }
    if __name__ == ‘__main__‘:
        request = urllib.request.Request(url, headers=head)
        html = ""
        try:
            response = urllib.request.urlopen(request)
            html = response.read().decode("utf-8")
        except urllib.error.URLError as e:
            if hasattr(e,"code"):
                print(e.code)
            if hasattr(e,"reason"):
                print(e.reasen)
        return html
def get_info(baseurl):
    html = askUrl(baseurl)
    bs = BeautifulSoup(html, "html.parser")
    return bs
#soup处理并转换成字符串
def transport(bs, info):
    ex_info = bs.find_all(class_=info)
    info = str(ex_info)
    return ex_info, info
def get_conn():
    conn = pymysql.connect(
        host="localhost",
        user="root",
        passwd="qwer1234",
        db="news",
        charset="utf8mb4"
    )
    cursor = conn.cursor()
    return conn, cursor
#关闭数据库
def close_conn(conn, cursor):
    if cursor:
        cursor.close()
    if conn:
        conn.close()
#更新新闻数据
def update_news(allinfo):
    cursor = None
    conn = None
    try:
        conn, cursor = get_conn()
        sql = "insert into new(title, article, type) values(%s,%s,%s)"
        print(f"{time.asctime()}开始更新最新数据")
        for item in allinfo:
            cursor.execute(sql, item)
        conn.commit()
        print(f"{time.asctime()}更新最新数据完毕")
    except:
        traceback.print_exc()
    finally:
        close_conn(conn, cursor)

if __name__=="__main__":
    head = {
        # "Cookie": "pgv_pvid = 2445437098;RK = IWJFENCj / 2;ptcz = 0dc31e9c452a0701259378ea4d93881f2a4d4ab7d29d637d6da1b0b24d857f4c;Qs_lvt_323937 = 1588214559;Qs_pv_323937 = 3783410537228747000;pgv_pvi = 5491528704;eas_sid = t196y05258V4B6g478m7t073P2;luin = o0775929901;lskey = 000100001264ed0bece633b72b741fb54e5137a729bfa3647db8a18c0ee96579fd05aff03206e6cafbeb0f88",
        # "Connection": "keep-alive",
        # "Cache-Control": "max-age = 0",
        # "Accept-Language": "zh - CN, zh;q = 0.9",
        # "Accept-Encoding": "gzip, deflate, br",
        # "Accept": "text / html, application / xhtml + xml, application / xml;q = 0.9, image / webp, image / apng, * / *;q = 0.8",
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36 Edg/89.0.774.57"
    }
    #存放所有的新闻网址
    linkall = []
    #所有存放新闻的.js文件
    linkJQ = []
    #所有超链接id
    Linkid = []
    #所有超链接Authorid
    LinkAid = []
    #存放所有标题
    allTitle = []
    #存放所有文章
    allArticle = []
    #存放所有图片链接
    allImg = []
    #汇总所有存入mysql的数据
    allinfo = []
    #制作每个js网页的链接
    for i in range(1,9):
        linkJQ.append(
            ‘https://cis.sohu.com/cis/feeds?clientType=3&pvId=1619445764450DO5aazw&requestId=2011032041009993_1619445764450&refererSpm=smpc.ch30.fd-news&sceneParam=[{%22spm%22:%22smpc.ch30.fd-news%22,%22page%22:‘ + str(
                i) + ‘,%22size%22:25}]‘)
        res = requests.get(linkJQ[i - 1], headers=head)
        response_data = json.loads(res.text)
    #存入每个新闻的id和authorid
        for index, value in enumerate(response_data[‘smpc.ch30.fd-news‘][‘data‘]):
            if int(response_data[‘smpc.ch30.fd-news‘][‘data‘][index][‘resourceData‘][‘id‘]) > 1000000:
                Linkid.append(response_data[‘smpc.ch30.fd-news‘][‘data‘][index][‘resourceData‘][‘id‘])
                LinkAid.append(str(response_data[‘smpc.ch30.fd-news‘][‘data‘][index][‘resourceData‘][‘contentData‘][‘authorId‘]))

    #制作旅游新闻所有网址
    for index,value in enumerate(Linkid):
        linkall.append(‘https://www.sohu.com/a/‘+str(Linkid[index])+‘_‘+str(LinkAid[index])+‘?scm=1004.768163804164063232.0.0.4162&spm=smpc.travel-home.feed.5.1619267001122I92VC4c‘)
    #最后一个链接是广告，删除
    linkall.pop()
    #开始爬取主要数据
    for index, value in enumerate(linkall):
        bs = get_info(value)
        title = bs.select("h1")
        article = bs.select("article > p")
        if title and article:
            str = ‘‘
            # 总文章表添加文章
            for item in range(1, len(article)):
                str += article[item].get_text()
            if len(str) * 4 > 21000:
                print("超出可储存长度")
                del linkall[index]
                continue
            # article = article[0].get_text().replace("返回搜狐，查看更多", "").replace("责任编辑：", "").replace(r"\n", "")
            allArticle.append(str.replace("返回搜狐，查看更多", "").replace("责任编辑：", ""))
            # 总标题表添加标题
            allTitle.append(title[0].get_text().strip().replace("原创", "").replace("\n", ""))
            print(index)
            print(value)
            print(title[0].get_text().strip().replace("原创", ""))
            # 总图片表添加图片
            # ex_info, info = transport(bs, "ql-align-center")
            # findImg = re.compile(r‘<p class="ql-align-center"><img max-width="600" src="(.*?)"/></p>‘)
            # Img = re.findall(findImg, info)
            # if Img:
            #     allImg.append(Img)
            # else:
            #     allImg.append("")
        else:
            print(index)
            print(value)
            del linkall[index]
    # for item in linkall:
    #     allinfo.append([item])
    for index, value in enumerate(allTitle):
        allinfo.append([value])
        allinfo[index].append(allArticle[index])
        allinfo[index].append(‘科技‘)
    update_news(allinfo)