1.自定义需求
英雄联盟的英雄皮肤,手机app查看太麻烦,一个个翻,看起来不够直观,想要实现按英雄名称文件夹命名,分类保存在本地,英雄的数据信息保存在数据库中,需求很简单吧!
2.需求分析
a)根据英雄名称创建文件夹
b)根据英雄所有皮肤图片链接保存图片
c)英雄的属性信息保存MongoDb
3.实现思路
a)用到技术点:Fiddler抓包工具+Python语言+Scrapy框架+MongoDb数据库+virtualenv沙箱
b)抓包分析
①首先设置Fiddler代理,手机连接无线网,设置无线网代理
②获取全部英雄属性数据
http://gpcd.gtimg.cn/upload/qqtalk/lol_hero/1d/hero_list.js
③英雄皮肤图片数据
http://lol.qq.com/biz/hero/skins.js
④英雄数据格式
⑤根据英雄英文名称en_name查找皮肤数据,ok,数据关系已经找到了
⑥代码实现,请求链接,解析数据,实现保存
Spider代码:请求数据,保存图片
# -*- coding: utf-8 -*-
import scrapy
from scrapy.linkextractors import LinkExtractor
from scrapy.spiders import CrawlSpider, Rule,Request
import json,re,os
class SkinSpider(CrawlSpider):
name = 'Skin'
allowed_domains = ['lol.qq.com']
start_urls = ['http://gpcd.gtimg.cn/upload/qqtalk/lol_hero/1d/hero_list.js']
count = 0
rules = (
#Rule(LinkExtractor(allow=r'lol_hero/'), callback='parse_item', follow=True),
)
def parse_start_url(self, response):
datas = json.loads(response.text)
dicnames = {}
meta = {}
for data in datas:
dicnames[data["en_name"]] = data["name"]
yield data
meta["datanames"] = dicnames
yield Request('http://lol.qq.com/biz/hero/skins.js',meta = meta,callback=self.parse_skin,dont_filter=True)
def parse_skin(self,respomse):
strskins = re.findall(r'{"Aatrox.*.}]}',respomse.text)[0]
datas = json.loads(strskins)
datanames = respomse.meta["datanames"]
for key in datas:
if datas[key]:
for item in datas[key]:
meta = {}
meta["dir"] = datanames[key]
meta["filename"] = item["name"]
yield Request("http://ossweb-img.qq.com/images/lol/appskin/{}.jpg".format(item["id"]),meta = meta, callback=self.parse_image, dont_filter=True)
def parse_image(self,response):
self.create_dir(response.meta)
dirpath = response.meta["dir"].strip().rstrip("\\")
filename = response.meta["filename"].strip().rstrip("\\")
fullname = "./SkinsPic/{}/{}.jpg".format(dirpath,filename)
with open(fullname, 'wb') as f:
f.write(response.body)
self.count = self.count+1
print('success count:',self.count)
def create_dir(self,meta):
basepath = './SkinsPic'
dirpath = basepath+'/'+meta["dir"].strip().rstrip("\\")
if not os.path.exists(basepath):
os.makedirs(basepath)
if not os.path.exists(dirpath):
os.makedirs(dirpath)
Piplines代码:英雄属性数据插入到MongoingDb
# -*- coding: utf-8 -*-
from pymongo import MongoClient
import datetime
class LolskinPipeline(object):
def __init__(self):
client = MongoClient('mongodb://localhost:27017')
db = client['LOL']
self.collection = db["skin"]
self.count = 0
def process_item(self, item, spider):
print('********************************************')
print(item,item.keys())
if 'en_name' in item.keys():
item["time"] =datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')
self.collection.insert_one(item)
self.count = self.count + 1
return self.count
else:
return 'no item'
settings配置
ITEM_PIPELINES = {
'LOlSkin.pipelines.LolskinPipeline': 300,
}
4.效果图
5.总结
①简单掌握Scrapy框架
②熟悉Linux开发环境,之前都是在Windows环境
③virtualenv简单掌握