Download iOS Headers from http://developer.limneos.net. Includes settings for iOS version, download path and only downloading select frameworks.

downloadiOSHeaders.py

from lxml import html
import requests
import re
import os

def createDir(path):
    if not os.path.exists(path): os.makedirs(path)

# Settings
iosVersion = "14.4"
downloadOnly = ["SpringBoard", "NotificationCenter", "UserNotifications", "UserNotificationsKit", "UserNotificationsServer", "UserNotificationsUI", "UserNotificationsUIKit"]
downloadPath = "./Headers"

mainPageLink = "http://developer.limneos.net/index.php?ios={}"
downloadPageLink = "http://developer.limneos.net/headers/{}/{}/Headers/{}"
frameworkLinkRegex = "\?ios=.*&framework=(.*)"
headerLinkRegex = "\?ios=.*&framework=.*&header=(.*)"

main = mainPageLink.format(iosVersion)

page = requests.get(main, verify=False)
tree = html.fromstring(page.content)

frameworks = tree.xpath('/html/body/div[@id="container"]/div/a/@href')

headerDownloads = []
for frameworkLink in frameworks:
    frameworkName = re.search(frameworkLinkRegex, frameworkLink)
    frameworkName = frameworkName.group(1) if frameworkName is not None else None
    if frameworkName.replace(".framework", "") not in downloadOnly and len(downloadOnly) != 0: continue

    frameworkPage = requests.get(main.split("?")[0] + frameworkLink, verify=False)
    frameworkTree = html.fromstring(frameworkPage.content)

    headers = frameworkTree.xpath('/html/body/div[@id="container"]/div/a/@href')

    for headerLink in headers:
        headerFileName = re.search(headerLinkRegex, headerLink)
        headerFileName = headerFileName.group(1) if headerFileName is not None else None

        if headerFileName is None: continue
    
        headerDownloads.append([frameworkName, headerFileName])

numOfDownloads = len(headerDownloads)
maxDigits = str(len(str(numOfDownloads)))
progressStringFormat = "{:" + maxDigits + "d}/{:" + maxDigits + "d}"
stringFormat = "(" + progressStringFormat + ") {:13}:{} - {}"

for i in range(len(headerDownloads)):
    download = headerDownloads[i]
    downloadLink = downloadPageLink.format(iosVersion, download[0], download[1])
    savePath = os.path.join(downloadPath, download[0], download[1])
    if os.path.isfile(savePath):
        print(stringFormat.format(i, numOfDownloads, "Skipping", download[0], download[1]));
        continue
    else:
        createDir(os.path.join(downloadPath, download[0]))
        print(stringFormat.format(i, numOfDownloads, "Downloading", download[0], download[1]));

    r = requests.get(downloadLink, verify=False) 
    with open(savePath, 'wb') as out:
        out.write(r.content)

Fixed SSLError : certificate verify failed

Make use you install lxml using, pip3 install lxml

OG code by @menushka

what a lovely script!! ヽ(♡‿♡)ノ to get rid of the warnings, add this up top:

import urllib3

urllib3.disable_warnings()