千猫图

NO3/third.py

+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])