获取首页元素信息：
目标 test_URL：http://www.xxx.com.cn/
首先检查元素，a 标签下是我们需要爬取得链接，通过获取链接路径，定位出我们需要的信息
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soup = Bs4(reaponse.text, "lxml")urls_li = soup.select("#mainmenu_top > div > div > ul > li") |
首页的URL链接获取：
完成首页的URL链接获取，具体代码如下：
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'''遇到不懂的问题？Python学习交流群：821460695满足你的需求，资料都已经上传群文件，可以自行下载！'''def get_first_url(): list_href = [] reaponse = requests.get("http://www.xxx.com.cn", headers=headers) soup = Bs4(reaponse.text, "lxml") urls_li = soup.select("#mainmenu_top > div > div > ul > li") for url_li in urls_li: urls = url_li.select("a") for url in urls: url_href = url.get("href") list_href.append(head_url+url_href) out_url = list(set(list_href)) for reg in out_url: print(reg) |
遍历第一次返回的结果：
从第二步获取URL的基础上，遍历请求每个页面，获取页面中的URL链接，过滤掉不需要的信息
具体代码如下：
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def get_next_url(urllist): url_list = [] for url in urllist: response = requests.get(url,headers=headers) soup = Bs4(response.text,"lxml") urls = soup.find_all("a") if urls: for url2 in urls: url2_1 = url2.get("href") if url2_1: if url2_1[0] == "/": url2_1 = head_url + url2_1 url_list.append(url2_1) if url2_1[0:24] == "http://www.xxx.com.cn": url2_1 = url2_1 url_list.append(url2_1) else: pass else: pass else: pass else: pass url_list2 = set(url_list) for url_ in url_list2: res = requests.get(url_) if res.status_code ==200: print(url_) print(len(url_list2)) |
递归循环遍历：
递归实现爬取所有url，在get_next_url()函数中调用自身，代码如下：
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get_next_url(url_list2) |
全部代码如下：
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import requestsfrom bs4 import BeautifulSoup as Bs4head_url = "http://www.xxx.com.cn"headers = { "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36"}def get_first_url(): list_href = [] reaponse = requests.get(head_url, headers=headers) soup = Bs4(reaponse.text, "lxml") urls_li = soup.select("#mainmenu_top > div > div > ul > li") for url_li in urls_li: urls = url_li.select("a") for url in urls: url_href = url.get("href") list_href.append(head_url+url_href) out_url = list(set(list_href)) return out_urldef get_next_url(urllist): url_list = [] for url in urllist: response = requests.get(url,headers=headers) soup = Bs4(response.text,"lxml") urls = soup.find_all("a") if urls: for url2 in urls: url2_1 = url2.get("href") if url2_1: if url2_1[0] == "/": url2_1 = head_url + url2_1 url_list.append(url2_1) if url2_1[0:24] == "http://www.xxx.com.cn": url2_1 = url2_1 url_list.append(url2_1) else: pass else: pass else: pass else: pass url_list2 = set(url_list) for url_ in url_list2: res = requests.get(url_) if res.status_code ==200: print(url_) print(len(url_list2)) get_next_url(url_list2)if __name__ == "__main__": urllist = get_first_url() get_next_url(urllist) |
以上这篇Python3 实现爬取网站下所有URL方式就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/fei347795790/article/details/99471972
