Spider爬虫--手机App抓包爬虫

import scrapy
import json
from Letv.items import LetvItem


# LetvliveSpider名字可以任意，继承scrapy.Spider,基本爬虫
class LetvliveSpider(scrapy.Spider):
    # 爬虫名称，在当前项目中名字不能重复发
    name = 'Letvlive'
    # 爬取的网站，只能在这个范围内容,如果注释掉，没有域名的限制，所以的网站都可以爬
    allowed_domains = ['letv.com']
    page = 1
    pre = "http://dynamic.live.app.m.letv.com/android/dynamic.php?luamod=main&mod=live&ctl=liveHuya&act=channelList&pcode=010210000&version=7.17&channelId=2168&pages="
    suf = "&country=CN&provinceid=1&districtid=9&citylevel=1&location=%E5%8C%97%E4%BA%AC%E5%B8%82%7C%E6%9C%9D%E9%98%B3%E5%8C%BA&lang=chs&region=CN"
    # start_urls里面的链接不受allowed_domains这里面的现在
    start_urls = [pre + str(page) + suf]
    def parse(self, response):
        json_text = response.text
        # 把json_text 转换成python_dict
        python_dict = json.loads(json_text)
        for item in python_dict["body"]["result"]:
            letvItem = LetvItem()
            # 获取昵称
            nick = item["nick"]
            image = item["screenshot"]
            letvItem["nick"] = nick
            letvItem["image"] = image
            print(letvItem)
            # 传递给pipelines（管道）
            yield letvItem
        if python_dict.get("header").get("status") == "1":
            self.page += 1
        new_url = self.pre + str(self.page) + self.suf

        # 会有相同的url链接，这个链接请求了，就不去请求
        # 把所以添加的链接，做去重处理，请求，当再次添加相同的链接进入的时候，判断请求过了，就不请求了
        # 把添加的，没有重复的请求后，爬虫结束了
        yield scrapy.Request(new_url, callback=self.parse)

import scrapy
from scrapy.pipelines.images import ImagesPipeline
# 保存图片
import json
import os
from Letv.settings import IMAGES_STORE


# from scrapy.utils.project import get_project_settings
class LetvImagePipeline(ImagesPipeline):
    # IMAGES_STORE = get_project_settings().get("IMAGES_STORE")

    # 添加请求图片的路径
    def get_media_requests(self, item, info):
        # 图片下载路径
        image = item["image"]
        # 把图片路径添加到scrapy引擎里面，让对应的下载器帮我们下载图片
        yield scrapy.Request(image)

    # 当图片下载完成后，会调用的方法，并且把下载后的路径，回传到这个方法里
    def item_completed(self, results, item, info):
        print("results===", results)
        image = [x["path"] for ok, x in results if ok][0]
        print(image)
        # 把图片的名字重命名
        old_image_name = IMAGES_STORE + "/" + image
        # ./images/黑作坊丶小美儿.jpg
        new_image_name = IMAGES_STORE + "/" + item["nick"] + ".jpg"
        print("old_image_name==", old_image_name)
        print("new_image_name==", new_image_name)
        # 重命名
        os.rename(old_image_name, new_image_name)
        print(image)
        item["image_path"] = new_image_name
        return item


# 默认是处理文本
class LetvPipeline(object):
    # 爬虫开始执行的时候调用
    def open_spider(self, spider):
        self.file = open(spider.name + ".json", "w")

    def process_item(self, item, spider):
        python_dict = dict(item)
        # pyhton 字典-->pyhton str
        json_str = json.dumps(python_dict, ensure_ascii=False) + "\n"
        self.file.write(json_str)
        return item

    # 当爬虫结束的时候调用
    def close_spider(self, spider):
        self.file.close()

# 不遵循爬虫协议
ROBOTSTXT_OBEY = False

ITEM_PIPELINES = {
    'Letv.pipelines.LetvPipeline': 301,  # 保存文本
    'Letv.pipelines.LetvImagePipeline': 300,  # 保存图片
}

# 图片保存的路径，一定要写，否则不去下载图片，要写对
IMAGES_STORE = "./images"

from scrapy import cmdline

cmdline.execute("scrapy crawl Letvlive".split())