Biegral Blog

创建项目

scrapy startproject douyu

编写items.py

1 import scrapy
2 
3 class DouyuItem(scrapy.Item):
4     nickname = scrapy.Field()
5     imagelink = scrapy.Field()
6     imagePath = scrapy.Field()

创建基础类的爬虫

scrapy genspider douyutupian capi.douyucdn.cn

手机抓包得到API接口，返回JSON格式数据

douyutupian.py

import scrapy
from douyu.items import DouyuItem
import json

'''
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'''
class DouyumeinvSpider(scrapy.Spider):
    name = "douyutupian"
    allowed_domains = ["capi.douyucdn.cn"]

    offset = 0
    url = "http://capi.douyucdn.cn/api/v1/getVerticalRoom?limit=20&offset="

    start_urls = [url + str(offset)]

    def parse(self, response):
        # 把json格式的数据转换为python格式，data段是列表
        data = json.loads(response.text)["data"]
        for each in data:
            item = DouyuItem()
            item["nickname"] = each["nickname"]
            item["imagelink"] = each["vertical_src"]

            yield item

        self.offset += 20
        yield scrapy.Request(self.url + str(self.offset), callback = self.parse)

管道文件pipelines.py

import scrapy
from scrapy.utils.project import get_project_settings
from scrapy.pipelines.images import ImagesPipeline
import os

class ImagesPipeline(ImagesPipeline):
    #def process_item(self, item, spider):
    #    return item
    # 获取settings文件里设置的变量值
    IMAGES_STORE = get_project_settings().get("IMAGES_STORE")

    def get_media_requests(self, item, info):
        image_url = item["imagelink"]
        yield scrapy.Request(image_url)

    def item_completed(self, result, item, info):
        image_path = [x["path"] for ok, x in result if ok]

        os.rename(self.IMAGES_STORE + "/" + image_path[0], self.IMAGES_STORE + "/" + item["nickname"] + ".jpg")

        item["imagePath"] = self.IMAGES_STORE + "/" + item["nickname"]

        return item

settings.py

BOT_NAME = 'douyu'

SPIDER_MODULES = ['douyu.spiders']
NEWSPIDER_MODULE = 'douyu.spiders'

DEFAULT_REQUEST_HEADERS = {
    "User-Agent" : "DYZB/1 CFNetwork/808.2.16 Darwin/16.3.0"
}

ITEM_PIPELINES = {
    'douyu.pipelines.ImagesPipeline': 300,
}

IMAGES_STORE = "IMAGES_STORE = "../../Images"