instagram_image_urls.py

import re
import json
import requests
from json_api.errors import ExceptionWithStatusCode

UA = (
    'Mozilla/5.0 (iPhone; CPU iPhone OS 13_1_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) '
    'Mobile/15E148 MicroMessenger/7.0.8(0x17000820) NetType/WIFI Language/zh_CN'
)


def unesacpe(url):
    return url.replace(r"\/", "/")


def grep_urls(html):
    html = html.encode().decode('unicode-escape')
    regex = re.compile(
        r"((https?|ftp|file)://[-A-Za-z0-9\+&@#/%?=~_|!:,.;]*[-A-Za-z0-9\+&@#/%=~_|])",
        re.I | re.S,
    )
    urls = set(unesacpe(x[0]) for x in regex.findall(html))
    return sorted(urls)


def uniq(lst):
    return sorted(filter(lambda x: x and x.strip(), set(lst)))


def clean_url(url: str):
    if not url.startswith("http"):
        urls = grep_urls(url)
        url = urls and urls[0]
    if not isinstance(url, str) or not str(url).startswith("http"):
        raise ExceptionWithStatusCode("invalid url", status=400)
    return url


def http_get_url(url):
    resp = requests.get(url, headers={'User-Agent': UA})
    return resp.status_code, resp.text


def get_image_urls_via_instagram_graphql(url):
    url = clean_url(url)
    if "?" in url:
        url += "&__a=1"
    else:
        url += "?__a=1"
    status, html = http_get_url(url)
    if status != 200:
        raise ExceptionWithStatusCode(
            f'get url content failed, status code {status}', status=status
        )

    fn_urls = lambda html: list(
        get_by_key(json.loads(html), ["video_url", "display_url"])
    )
    return {'urls': uniq(fn_urls(html))}


def get_by_key(data, keys):
    """
    test links:
    2 vidoes: https://www.instagram.com/p/B3RAsfZAww6/
    2 images: https://www.instagram.com/p/B3Ob1HugPge/
    """
    if isinstance(data, dict):
        if data.get("__typename") in ["GraphVideo", "GraphImage"]:
            for key in keys:
                if key in data:
                    yield data[key]
                    break

        for _, v in data.items():
            yield from get_by_key(v, keys)
    elif isinstance(data, list):
        for x in data:
            yield from get_by_key(x, keys)
    else:
        return


print(get_image_urls_via_instagram_graphql('https://www.instagram.com/p/B3Ob1HugPge/'))