# -*- coding: utf-8 -*-
"""检查 UEditor iframe 是否可以访问"""
import sys, socket, json, time, urllib.request, urllib.parse
sys.stdout.reconfigure(encoding='utf-8')

HOST = 'localhost'
PORT = 9223

pages = json.loads(urllib.request.urlopen(f'http://{HOST}:{PORT}/json').read())
page_id = [p['id'] for p in pages if 'baijiahao.baidu.com' in p['url']][0]

ws_url = f'ws://{HOST}:{PORT}/devtools/page/{page_id}'
parsed = urllib.parse.urlparse(ws_url)
sock = socket.create_connection((parsed.hostname, parsed.port or 80), timeout=15)
key = 'dGhlIHNhbXBsZSBub25jZQ=='
handshake = f'GET {parsed.path} HTTP/1.1\r\nHost:{parsed.hostname}:{parsed.port}\r\nUpgrade:websocket\r\nConnection:Upgrade\r\nSec-WebSocket-Key:{key}\r\nSec-WebSocket-Version:13\r\n\r\n'
sock.send(handshake.encode())
resp = b''
while b'\r\n\r\n' not in resp:
    resp += sock.recv(4096)

def send(s, d):
    data = json.dumps(d).encode('utf-8')
    n = len(data)
    mask = b'\x01\x02\x03\x04'
    if n <= 125:
        hdr = bytes([0x81, n|0x80]) + mask
    elif n <= 65535:
        hdr = bytes([0x81, 0xFE]) + n.to_bytes(2, 'big') + mask
    s.send(hdr + bytes(data[i] ^ mask[i%4] for i in range(n)))

def recv(s):
    h = s.recv(2)
    n = h[1] & 0x7f
    if n == 126:
        n = int.from_bytes(s.recv(2), 'big')
    elif n == 127:
        n = int.from_bytes(s.recv(8), 'big')
    return s.recv(n).decode('utf-8')

# 检查 UEditor iframe
expr = '''
(function(){
    var iframe = document.getElementById('ueditor_0');
    if(!iframe) return 'no_iframe';
    
    try{
        var doc = iframe.contentDocument || iframe.contentWindow.document;
        if(!doc) return 'no_doc';
        
        var body = doc.body;
        return 'iframe_accessible:body_len=' + (body.innerText||'').length + ':html_len=' + (body.innerHTML||'').length;
    } catch(e){
        return 'blocked:' + e.message;
    }
})()
'''
send(sock, {'id':1,'method':'Runtime.evaluate','params':{'expression':expr}})
r = recv(sock)
print('UEditor iframe 访问:')
print(json.loads(r)['result']['result']['value'])

sock.close()