#!/usr/bin/env python3
"""修复标题"""
import socket, json, urllib.request, urllib.parse, time

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')

print("Step 1: 清空 .input-box")
expr1 = '''
(function(){
    var box = document.querySelector('.input-box');
    if(box){
        box.innerHTML = '<p><br></p>';
    }
    return 'cleared';
})()
'''
send(sock, {'id':1,'method':'Runtime.evaluate','params':{'expression':expr1}})
r = recv(sock)
print("  结果:", r)

time.sleep(1)

print("\nStep 2: 设置正确标题")
title = "山东第二医科大学：山东省重点大学还是普通本科？"
expr2 = '''
(function(){
    var box = document.querySelector('.input-box');
    if(box){
        box.innerText = "''' + title + '''";
        box.dispatchEvent(new Event('input', {bubbles: true}));
    }
    return box ? box.innerText.length : 0;
})()
'''
send(sock, {'id':2,'method':'Runtime.evaluate','params':{'expression':expr2}})
r = recv(sock)
print("  结果:", r)

sock.close()
print("\n完成！请查看页面")
