共计 2260 个字符，预计需要花费 6 分钟才能阅读完成。
可参看 Knowsmore
抓取 Youtube 列表数据的前提是 scrapy 部署的机器可以正常访问 Youtube 网站
示例网址
存取到 Mongo 中的数据如下：
{
“playlist_id” : “PLEbPmOCXPYV67l45xFBdmodrPkhzuwSe9”,
“videos” : [
{
“playlist_id” : “PLEbPmOCXPYV67l45xFBdmodrPkhzuwSe9”,
“video_id” : “9pTwztLOvj4”,
“thumbnail” : [
{
“url” : “https://i.ytimg.com/vi/9pTwztLOvj4/hqdefault.jpg?sqp=-oaymwEZCPYBEIoBSFXyq4qpAwsIARUAAIhCGAFwAQ==&rs=AOn4CLCmUXUPe-HgXiie0SRfL5cYz0JRrg”,
“width” : 245,
“height” : 137
}
],
“title” : “Legend of the galactic heroes (1988) episode 1”,
“index” : 1,
“length_seconds” : 1445,
“is_playable” : true
},
{
“playlist_id” : “PLEbPmOCXPYV67l45xFBdmodrPkhzuwSe9”,
“video_id” : “zzD1xU37Vtc”,
“thumbnail” : [
{
“url” : “https://i.ytimg.com/vi/zzD1xU37Vtc/hqdefault.jpg?sqp=-oaymwEZCPYBEIoBSFXyq4qpAwsIARUAAIhCGAFwAQ==&rs=AOn4CLCnLCYaZVBeHnZR0T73rfEd_Dbyew”,
“width” : 245,
“height” : 137
}
],
“title” : “Legend of the galactic heroes (1988) episode 2”,
“index” : 2,
“length_seconds” : 1447,
“is_playable” : true
},
代码如下：
# -*- coding: utf-8 -*-
import scrapy
import re
import json
from scrapy import Selector
from knowsmore.items import YoutubePlaylistItem, YoutubePlaylistVideoItem
from ..common import *
class YoutubeListSpider(scrapy.Spider):
name = ‘youtube_list’
allowed_domains = [‘www.youtube.com’]
start_urls = [‘https://www.youtube.com/playlist?list=PLEbPmOCXPYV67l45xFBdmodrPkhzuwSe9′]
def parse(self, response):
# Extract JSON Data with Regex Expression
ytInitialData = r1(r’window\[“ytInitialData”\] = (.*?)}};’, response.body)
if ytInitialData:
ytInitialData = ‘%s}}’ % ytInitialData
ytInitialDataObj = json.loads(ytInitialData)
# Assign VideoList info to variable
playListInfo = ytInitialDataObj[‘contents’][‘twoColumnBrowseResultsRenderer’][‘tabs’][0][‘tabRenderer’][‘content’][‘sectionListRenderer’][‘contents’][0][‘itemSectionRenderer’][‘contents’][0][‘playlistVideoListRenderer’]
# Build Scrapy Item
playList = YoutubePlaylistItem(
playlist_id = playListInfo[‘playlistId’],
videos = []
)
# Insert the videoItem to YoutubePlaylistItem videos field
for videoInfo in playListInfo[‘contents’]:
videoInfo = videoInfo[‘playlistVideoRenderer’]
videoItem = YoutubePlaylistVideoItem(
playlist_id = playListInfo[‘playlistId’],
video_id = videoInfo[‘videoId’],
thumbnail = videoInfo[‘thumbnail’][‘thumbnails’],
title = videoInfo[‘title’][‘simpleText’],
index = videoInfo[‘index’][‘simpleText’],
length_seconds = videoInfo[‘lengthSeconds’],
is_playable = videoInfo[‘isPlayable’]
)
playList[‘videos’].append(videoItem)
yield playList