import time

from multiprocessing import Pool

from selenium import webdriver

from selenium.webdriver.common.by import By

from selenium.webdriver.support.ui import WebDriverWait

from selenium.webdriver.support import expected_conditions as EC

from selenium.common.exceptions import TimeoutException

from bs4 import BeautifulSoup

from pymongo import MongoClient

from pymongo.errors import PyMongoError

# monogdb配置信息

MONGO_HOST = "localhost"

MONGO_DATABASE = "douyu"

MONGO_TABLE = "zhibo"

client = MongoClient(host=MONGO_HOST)

db = client[MONGO_DATABASE]

# PhantomJS 命令行相关配置

# 参见 http://phantomjs.org/api/command-line.html

SERVICE_ARGS = ['--disk-cache=true', '--load-images=false']

# driver = webdriver.Chrome()  # 有界面

driver = webdriver.PhantomJS(service_args=SERVICE_ARGS)  # *面

delay = 10

wait = WebDriverWait(driver, delay)

driver.maximize_window()

def get_total_pages():

    url = 'https://www.douyu.com/directory/all'

    driver.get(url)

    pages = int(driver.find_element_by_css_selector(

        '.shark-pager-dot + .shark-pager-item').text)

    print("正在获取第1页数据")

    room_list = get_rooms_by_beautifulsoup()

    save_to_monogodb(room_list)

    return pages

# 根据页码获取指定页数据，并将其保存到数据库中

def parse_page(page_num):

    print("正在获取第%d页数据" % page_num)

    try:

        page_num_box = wait.until(

            EC.presence_of_element_located(

                (By.CSS_SELECTOR, "input.jumptxt")))

        go_btn = wait.until(EC.element_to_be_clickable(

            (By.CSS_SELECTOR, 'a.shark-pager-submit')))

        page_num_box.clear()

        page_num_box.send_keys(page_num)

        go_btn.click()

        # driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")

        # time.sleep(0.1)

        wait.until(

            EC.text_to_be_present_in_element(

                (By.CSS_SELECTOR,

                 '.shark-pager-item.current'),

                str(page_num)))

        # 对于By.CLASS_NAME invalid selector: Compound class names not permitted

        room_list = get_rooms_by_beautifulsoup()

        save_to_monogodb(room_list)

    except TimeoutException:

        print("请求第%d页失败" % page_num)

        print("尝试重新获取第%d页" % page_num)

        return parse_page(page_num)

# 通过bs4解析数据

def get_rooms_by_beautifulsoup():

    '''

    通过bs4库解析数据

    获取直播间的名称，观看人数,标签，主播名

    '''

    wait.until(EC.presence_of_element_located(

        (By.CSS_SELECTOR, "ul#live-list-contentbox > li")))

    html = driver.page_source

    soup = BeautifulSoup(html, 'lxml')

    rooms = soup.select('ul#live-list-contentbox > li')

    for room in rooms:

        room_name = room.find(

            'h3', attrs={

                'class': 'ellipsis'}).get_text(

            strip=True)

        view_count = room.find('span', class_='dy-num fr').text

        tag = room.find('span', class_='tag ellipsis').text

        hostname = room.find('span', class_='dy-name ellipsis fl').text

        #print("房间名: " + room_name + "\t观看人数: " + view_count + "\t标签: " + tag + "\t主播名: " + hostname)

        yield {

            'room_name': room_name,

            'view_count': view_count,

            'tag': tag,

            'hostname': hostname,

        }

def save_to_monogodb(room_list):

    for room in room_list:

        try:

            db[MONGO_TABLE].insert(room)   # insert支持插入多条数据

            print("mongodb插入数据成功:", room)

        except PyMongoError as e:

            print("mongodb插入数据失败:", room, e)

if __name__ == '__main__':

    try:

        total_pages = get_total_pages()

        for page_num in range(2, total_pages + 1):

            parse_page(page_num)

    except Exception as e:

        print("出错了", e)

    finally:  # 确保 浏览器能正常关闭

        print("共有%d页" % total_pages)

        driver.close()