Python 2.7 BeautifulSoup電子郵件抓取在完整數據庫結束之前停止

Question

希望你一切都好！ 我是新手，正在使用Python 2.7！ 我正試圖從似乎沒有API的公共可用目錄網站中提取電子郵件：這是該網站： http : //www.tecomdirectory.com/companies.php? segment=&activity=&search=&search=category&submit=Search
，代碼將停止收集電子郵件，該電子郵件位於頁面底部“顯示更多內容”的位置！ 這是我的代碼：

import requests
import re
from bs4 import BeautifulSoup
file_handler = open('mail.txt','w')

soup  = BeautifulSoup(requests.get('http://www.tecomdirectory.com/companies.php?segment=&activity=&search=category&submit=Search').content)
tags = soup('a') 
list_new =[]
for tag in tags:
    if (re.findall(r'href="mailto:([^"@]+@[^"]+)">\1</a>',('%s'%tag))): list_new = list_new +(re.findall(r'href="mailto:([^"@]+@[^"]+)">\1</a>', ('%s'%tag)))

for x in list_new:
    file_handler.write('%s\n'%x)
file_handler.close()

我如何確保代碼到達目錄末尾並且不會在顯示更多負載的地方停下來？ 謝謝。 溫馨問候

Answer 1

您只需要發布一些數據，尤其是遞增group_no即可模擬單擊“加載更多”按鈕：

from bs4 import BeautifulSoup
import requests

# you can set whatever here to influence the results
data = {"group_no": "1",
        "search": "category",
        "segment": "",
        "activity": "",
        "retail": "",
        "category": "",
        "Bpark": "",
        "alpha": ""} 

post = "http://www.tecomdirectory.com/getautocomplete_keyword.php"

with requests.Session() as s:
    soup = BeautifulSoup(
        s.get("http://www.tecomdirectory.com/companies.php?segment=&activity=&search=category&submit=Search").content,
        "html.parser")
    print([a["href"] for a in soup.select("a[href^=mailto:]")])
    for i in range(1, 5):
        data["group_no"] = str(i)
        soup = BeautifulSoup(s.post(post, data=data).content, "html.parser")
        print([a["href"] for a in soup.select("a[href^=mailto:]")])

要走到最后，您可以循環播放，直到帖子沒有返回html為止，這表明我們無法再加載任何頁面：

def yield_all_mails():
    data = {"group_no": "1",
            "search": "category",
            "segment": "",
            "activity": "",
            "retail": "",
            "category": "",
            "Bpark": "",
            "alpha": ""}

    post = "http://www.tecomdirectory.com/getautocomplete_keyword.php"
    start = "http://www.tecomdirectory.com/companies.php?segment=&activity=&search=category&submit=Search"
    with requests.Session() as s:
        resp = s.get(start)
        soup = BeautifulSoup(s.get(start).content, "html.parser")
        yield (a["href"] for a in soup.select("a[href^=mailto:]"))
        i = 1
        while resp.content.strip():
            data["group_no"] = str(i)
            resp = s.post(post, data=data)
            soup = BeautifulSoup(resp.content, "html.parser")
            yield (a["href"] for a in soup.select("a[href^=mailto:]"))
            i += 1

因此，如果我們像下面那樣運行函數，將"alpha": "Z"為僅在Z上進行迭代：

from itertools import chain
for mail in chain.from_iterable(yield_all_mails()):
    print(mail)

我們會得到：

mailto:info@10pearls.com
mailto:fady@24group.ae
mailto:pepe@2heads.tv
mailto:2interact@2interact.us
mailto:gc@worldig.com
mailto:marilyn.pais@3i-infotech.com
mailto:3mgulf@mmm.com
mailto:venkat@4gid.com
mailto:info@4power.biz
mailto:info@4sstudyabroad.com
mailto:fouad@622agency.com
mailto:sahar@7quality.com
mailto:mike.atack@8ack.com
mailto:zyara@emirates.net.ae
mailto:aokasha@zynx.com

Process finished with exit code 0

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