解决了返回data为空、爬取大图、以title命名文件的bug

[Anodsaber]

import requests
from urllib.parse import urlencode
from requests import codes
import os
from hashlib import md5
from multiprocessing.pool import Pool
import re


def get_page(offset):
    headers = {
        'cookie': 'tt_webid=6667396596445660679; csrftoken=3a212e0c06e7821650315a4fecf47ac9; tt_webid=6667396596445660679; WEATHER_CITY=%E5%8C%97%E4%BA%AC; UM_distinctid=16b846003e03d7-0dd00a2eb5ea11-353166-1fa400-16b846003e1566; CNZZDATA1259612802=2077267981-1561291030-https%253A%252F%252Fwww.baidu.com%252F%7C1561361230; __tasessionId=4vm71cznd1561363013083; sso_uid_tt=47d6f9788277e4e071f3825a3c36a294; toutiao_sso_user=e02fd616c83dff880adda691cd201aaa; login_flag=6859a0b8ffdb01687b00fe96bbeeba6e; sessionid=21f852358a845d783bdbe1236c9b385b; uid_tt=d40499ec45187c2d411cb7bf656330730d8c15a783bb6284da0f73104cd300a2; sid_tt=21f852358a845d783bdbe1236c9b385b; sid_guard="21f852358a845d783bdbe1236c9b385b|1561363028|15552000|Sat\054 21-Dec-2019 07:57:08 GMT"; s_v_web_id=6f40e192e0bdeb62ff50fca2bcdf2944',
        'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.157 Safari/537.36',
        'x-requested-with': 'XMLHttpRequest',
        'referer': 'https://www.toutiao.com/search/?keyword=%E8%A1%97%E6%8B%8D',
    }
    params = {
        'aid': '24',
        'app_name': 'web_search',
        'offset': offset,
        'format': 'json',
        'keyword': '街拍',
        'autoload': 'true',
        'count': '20',
        'en_qc': '1',
        'cur_tab': '1',
        'from': 'search_tab',
        'pd': 'synthesis',
    }
    base_url = 'https://www.toutiao.com/api/search/content/?'
    url = base_url + urlencode(params)
    # print(url)
    try:
        resp = requests.get(url, headers=headers)
        if 200  == resp.status_code:
            return resp.json()
    except requests.ConnectionError:
        return None


def get_images(json):
    if json.get('data'):
        data = json.get('data')
        for item in data:
            if item.get('title') is None:
                continue
            title = re.sub('[\t]', '', item.get('title'))
            images = item.get('image_list')
            for image in images:
                origin_image = re.sub("list.*?pgc-image", "large/pgc-image", image.get('url'))
                yield {
                    'image': origin_image,
                    'title': title
                }


def save_image(item):
    img_path = 'img' + os.path.sep + item.get('title')
    if not os.path.exists(img_path):
        os.makedirs(img_path)
    try:
        resp = requests.get(item.get('image'))
        if codes.ok == resp.status_code:
            file_path = img_path + os.path.sep + '{file_name}.{file_suffix}'.format(
                file_name=md5(resp.content).hexdigest(),
                file_suffix='jpg')
            if not os.path.exists(file_path):
                with open(file_path, 'wb') as f:
                    f.write(resp.content)
                print('Downloaded image path is %s' % file_path)
            else:
                print('Already Downloaded', file_path)
    except Exception as e:
        print(e)


def main(offset):
    json = get_page(offset)
    for item in get_images(json):
        save_image(item)


GROUP_START = 0
GROUP_END = 9

if __name__ == '__main__':
    pool = Pool()
    groups = ([x * 20 for x in range(GROUP_START, GROUP_END + 1)])
    pool.map(main, groups)
    pool.close()
    pool.join()

代码主要修改了以下内容：
1.添加了headers，使返回的json数据的data不为空

headers = {
        'cookie': 'tt_webid=6667396596445660679; csrftoken=3a212e0c06e7821650315a4fecf47ac9; tt_webid=6667396596445660679; WEATHER_CITY=%E5%8C%97%E4%BA%AC; UM_distinctid=16b846003e03d7-0dd00a2eb5ea11-353166-1fa400-16b846003e1566; CNZZDATA1259612802=2077267981-1561291030-https%253A%252F%252Fwww.baidu.com%252F%7C1561361230; __tasessionId=4vm71cznd1561363013083; sso_uid_tt=47d6f9788277e4e071f3825a3c36a294; toutiao_sso_user=e02fd616c83dff880adda691cd201aaa; login_flag=6859a0b8ffdb01687b00fe96bbeeba6e; sessionid=21f852358a845d783bdbe1236c9b385b; uid_tt=d40499ec45187c2d411cb7bf656330730d8c15a783bb6284da0f73104cd300a2; sid_tt=21f852358a845d783bdbe1236c9b385b; sid_guard="21f852358a845d783bdbe1236c9b385b|1561363028|15552000|Sat\054 21-Dec-2019 07:57:08 GMT"; s_v_web_id=6f40e192e0bdeb62ff50fca2bcdf2944',
        'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.157 Safari/537.36',
        'x-requested-with': 'XMLHttpRequest',
        'referer': 'https://www.toutiao.com/search/?keyword=%E8%A1%97%E6%8B%8D',
    }

2.将title中的制表符删掉，避免出现文件名不符合要求的bug

title = re.sub('[\t]', '', item.get('title'))

3.原始的大图URL过期了，于是改成新的形式

origin_image = re.sub("list.*?pgc-image", "large/pgc-image", image.get('url'))

[Null-Bot9875]

这两个链接是指向同一个图片的，按照这个正则应该是没有办法爬到大图的

http://p9-tt.byteimg.com/large/dfic-imagehandler/55304da6-077c-4308-9277-68e5db8bd814
和http://p3-tt.byteimg.com/large/dfic-imagehandler/55304da6-077c-4308-9277-68e5db8bd814
指向的又是同一个，所以实际上还是能用

[Anodsaber]

这两个链接是指向同一个图片的，按照这个正则应该是没有办法爬到大图的

http://p9-tt.byteimg.com/large/dfic-imagehandler/55304da6-077c-4308-9277-68e5db8bd814
和http://p3-tt.byteimg.com/large/dfic-imagehandler/55304da6-077c-4308-9277-68e5db8bd814
指向的又是同一个，所以实际上还是能用

因为large_image_url的写法变了，最早的re表达式匹配不着大图，所以修改了一下

[wjw1379321500]

爬了一些图片后出现NotADirectoryError: [Errno 20] 目录名称无效的问题，怎么解决啊？

[Jianyang1000]

接口是不是又改了，用requests.get()获取json获取不到，获取的都是
{"count":0,"return_count":0,"query_id":"6537385837821170952","has_more":0,"request_id":"2019080919093101015204407463655ED","search_id":"2019080919093101015204407463655ED","cur_ts":1565348972,"offset":250,"message":"success","pd":"synthesis","show_tabs":1,"keyword":"街拍","city":"北京","tokens":["街拍"],"log_pb":{"impr_id":"2019080919093101015204407463655ED"},"data":null,"data_head":[{"cell_type":79,"forword_search":true,"data_head_type":"data_head_intervention","query":"街拍"}],"ab_fields":null,"latency":675,"search_type":2,"tab_rank":null}

[JwDong2019]

1:根据自己浏览器情况，更改headers里面的内容
2:防止找不到图片报错，修改get_images函数。将‘’‘ images = item.get('image_list')’‘’修改为
if item.get('image_list') is None:
continue
images = item.get('image_list')

[yesxcv]

getpage(offset)方法里卖弄为什么要传入offset参数？有想交流下爬虫技术的吗？加我微信2761491796

[lipeng12138]

现在今日头条搜索“街拍”返回的结果中包含视频，只爬取图片需要在搜索条件包含has_video=False。其次，image_list字段并不包含文章内的所有图片，如需获取所有图片应该到文章中爬取节点属性为pgc-img的节点内容。2019-8-18

[lisilpython]

现在又加了时间戳了吧，请问你时间戳是怎么处理的

[lisilpython]

我用str(round(time.time()*1000))返回的json，data=None 哎苦恼

[lisilpython]

我用str(round(time.time()*1000))返回的json，data=None 哎苦恼

[838957471]

有多个参数timestamp 怎么解决

[lisilpython]

举个例子

…

------------------ 原始邮件 ------------------ 发件人: "CUG_ZuChuan Huang"<notifications@github.com>; 发送时间: 2019年9月4日(星期三) 下午4:25 收件人: "Python3WebSpider/Jiepai"<Jiepai@noreply.github.com>; 抄送: "X J"<641535181@qq.com>;"Comment"<comment@noreply.github.com>; 主题: Re: [Python3WebSpider/Jiepai] 解决了返回data为空、爬取大图、以title命名文件的bug (#21) 有多个参数timestamp 怎么解决 — You are receiving this because you commented. Reply to this email directly, view it on GitHub, or mute the thread.

[EndTime1874]

有多个参数timestamp怎么解决

那是当前时间，不用理会

[HIT-Owen]

现在又加了时间戳了吧，请问你时间戳是怎么处理的

不用管的 这个参数不用传 应该是请求的时候自动加上去的

[GlamyX]

小白复制进去，修改了headers，但是出现了'NoneType' object is not iterable这个错误是怎么回事呀？哪位大佬可以解答一下么？