import requests
import re
HEADERS = {
"User-Agent": "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 Safari/537.36"
}
# 获取分页
def get_pagesize(html):
# 编写简单的正则表达式 <a href='68_(\d+).html'>末页</a>
pagesize = re.search("<a href='68_(\d+).html'>末页</a>", html)
if pagesize is not None:
return pagesize.group(1)
else:
return 0
# 获取待抓取列表
def get_wait_list(url):
wait_urls = []
try:
res = requests.get(url=url, headers=HEADERS, timeout=5)
res.encoding = "gb2312"
html_text = res.text
pagesize = int(get_pagesize(html_text))
if pagesize > 0:
print(f"获取到{pagesize}页数据")
# 生成待抓取列表
for i in range(1, pagesize + 1):
wait_urls.append(f"http://p.ik123.com/zt/maomi/68_{i}.html")
return wait_urls
except Exception as e:
print("获取分页异常", e)
# 正则匹配详情页链接
def format_detail(html):
# 多次模拟得到正则表达式 <a class=preview href="(.*?)"
# 注意单引号与双引号嵌套
detail_urls = re.findall('<a class=preview href="(.*?)"', html)
return detail_urls
# 获取所有详情页链接数据
def get_detail_list(url):
try:
res = requests.get(url=url, headers=HEADERS, timeout=5)
res.encoding = "gb2312"
html_text = res.text
return format_detail(html_text)
except Exception as e:
print("获取详情页异常", e)
def format_mao_img(html):
# 匹配猫咪图正则表达式 <img alt=".*?" src=".*?" />
mao_img_urls = re.findall('<img alt=".*?" src="(.*?)" />', html)
return mao_img_urls
# 获取猫咪图片地址
def get_mao_img(detail_url):
try:
res = requests.get(url=detail_url, headers=HEADERS, timeout=5)
res.encoding = "gb2312"
html_text = res.text
return format_mao_img(html_text)
except Exception as e:
print("获取猫咪图片异常", e)
if __name__ == '__main__':
start_url = "http://p.ik123.com/zt/maomi/68_1.html"
wait_urls = get_wait_list(url=start_url)
detail_list = []
for url in wait_urls:
print(f"正在抓取{url}")
detail_list.extend(get_detail_list(url))
print(f"获取到{len(detail_list)}条详情页")
mao_imgs = []
for index, mao_detail in enumerate(detail_list):
if len(mao_detail) > 0:
print(f"正抓取第{index}页数据")
mao_imgs.extend(get_mao_img(mao_detail))
# 以下代码测试用
if len(mao_imgs) > 100:
break
print(f"获取到{len(mao_imgs)}条猫咪图")
print(mao_imgs[:5])
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