87 lines
2.8 KiB
Python
87 lines
2.8 KiB
Python
import datetime
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import subprocess
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import sys
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import tempfile
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from pathlib import Path
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import chromedriver_autoinstaller
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import requests
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from selenium import webdriver
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from selenium.webdriver import Keys
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from selenium.webdriver.chrome.options import Options
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from selenium.webdriver.common.by import By
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from selenium.webdriver.support import expected_conditions as EC
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from selenium.webdriver.support.ui import WebDriverWait
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IONEX_BASE_URL = 'https://cddis.nasa.gov/archive/gnss/products/ionex/'
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def fetch_latest_ionex(username: str, password: str):
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now = datetime.date.today()
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url = IONEX_BASE_URL + str(now.year)
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chromedriver_autoinstaller.install()
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options = Options()
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options.add_argument('--headless=new')
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driver = webdriver.Chrome(options=options)
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driver.get(url)
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# Login
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username_field = WebDriverWait(driver, 30).until(EC.presence_of_element_located((By.ID, "username")))
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username_field.clear()
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username_field.send_keys(username)
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password_field = WebDriverWait(driver, 10).until(EC.presence_of_element_located((By.ID, "password")))
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password_field.clear()
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password_field.send_keys(password)
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password_field.send_keys(Keys.RETURN)
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# Wait until we're redirected to the right page.
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WebDriverWait(driver, 30).until(EC.visibility_of_element_located((By.ID, "parDirTextContainer")))
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# Get the days in the year.
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day_elements = driver.find_elements(By.XPATH, '//div[@class="archiveDir"]/div[@class="archiveDirTextContainer"]/a[@class="archiveDirText"]')
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day_urls = [element.get_attribute('href') for element in day_elements]
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# Load the latest day.
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driver.get(day_urls[-1])
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# Find our file.
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file_elements = driver.find_elements(By.XPATH, '//a[@class="archiveItemText"]')
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file_urls = [element.get_attribute('href') for element in file_elements]
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found_url = None
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for u in file_urls:
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parts = u.split('/')
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if parts[-1].startswith('c2pg'):
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found_url = u
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break
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if found_url is None:
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print('Did not find c2pg')
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sys.exit(1)
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# Download our file.
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auth_cookie = None
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for cookie in driver.get_cookies():
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if cookie['name'] == 'ProxyAuth':
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auth_cookie = cookie['value']
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break
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if auth_cookie is None:
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print('Did not find ProxyAuth cookie')
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sys.exit(1)
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driver.close()
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del driver
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# Download data.
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zip_data_r = requests.get(found_url, cookies={'ProxyAuth': auth_cookie})
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zip_data_r.raise_for_status()
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# Read data.
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tmp_file = tempfile.NamedTemporaryFile()
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tmp_file.write(zip_data_r.content)
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tmp_dir = tempfile.TemporaryDirectory()
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subprocess.run(["7z", "e", tmp_file.name, f"-o{tmp_dir.name}"], check=True, stdout=subprocess.PIPE)
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p = Path(tmp_dir.name)
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target_file = list(p.iterdir())[-1]
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data = target_file.read_text()
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return data
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