gscloud.cn下载GDEMV3 DEM模型-526互联

采用Selenium+Chromedriver方式下载，具体安装Selenium+Chromedriver请看

https://zhuanlan.zhihu.com/p/588679601

（1）Python没有自带selenium库，需要自行下载，只需要用简单的命令即可实现：

pip install selenium

（2）安装Chrome浏览器

（3）接着去下载对应版本的Chromedriver。通常从以下网址下载：

https://npm.taobao.org/mirrors/

http://chromedriver.storage.googleapis.com/index.html

（4）下载程序：

from selenium import webdriver
import time
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.support import expected_conditions
from selenium.webdriver.support.wait import WebDriverWait
from selenium.webdriver.common.by import By
import os

driver = webdriver.Chrome(executable_path=r'C:\Users\Hx\AppData\Local\Programs\Python\Python310\chromedriver.exe')
driver.get('http://www.gscloud.cn/accounts/login_user')

urlpage = driver.current_url
dem = r'https://www.gscloud.cn/sources/accessdata/aeab8000652a45b38afbb7ff023ddabb?pid=302'
while urlpage!=dem:
   urlpage = driver.current_url
   time.sleep(1)


# 开始下载
# #一共是7页
page_num = 382
page = 1

while page <= page_num:
    print('当前下载第{}页'.format(page))
    for tr_num in range(1,10):  # 每页10个
        # d_everypage = '//*[@id="datasource"]/div/table/tr[dlv-row dlv-row-'+str(tr_num)+']/td[8]/div/div/p[2]/img'
        d_everypage = '//*[@id="datasource"]/div/table/tr['+str(2+tr_num)+']/td[9]/div/div/p[2]/img'
        WebDriverWait(driver, 20).until(expected_conditions.visibility_of_element_located((By.XPATH, d_everypage)))  # 翻页后重新定位，否则报错ElementClickInterceptedException:
        #element = driver.find_element_by_xpath(d_everypage)
        element = driver.find_element(By.XPATH, d_everypage)
        webdriver.ActionChains(driver).move_to_element(element).click(element).perform()
        time.sleep(5)  #下载间隔
    page += 1
    next = driver.find_element(By.XPATH, '//*[@id="pager"]/div/table/tr/td[10]/a/span/span/span').click()  # 下一页
    time.sleep(3)