# -*- coding: utf-8 -*-
import socket, json, urllib.request, urllib.parse

HOST = 'localhost'
PORT = 9223

# 获取页面
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]

# 连接
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')

# 找标题框 - cheetah-input 组件
expr = """
(function(){
    var results = [];
    var all = document.querySelectorAll('*');
    for(var el of all){
        if(el.className && el.className.toString().includes("cheetah-input")){
            var inp = el.querySelector("input");
            results.push({
                tag: el.tagName,
                class: el.className.toString().substring(0,80),
                inputExists: !!inp,
                inputValue: inp ? inp.value : "",
                inputPlaceholder: inp ? inp.placeholder : ""
            });
        }
    }
    return JSON.stringify(results.slice(0, 10));
})()
"""
send(sock, {'id':1,'method':'Runtime.evaluate','params':{'expression':expr}})
r = recv(sock)
print('cheetah-input 组件:')
print(json.loads(r)['result']['result']['value'])

# 尝试用另一种方式找标题 - 查找所有带有 placeholder 的 input
expr2 = """
(function(){
    var results = [];
    var inputs = document.querySelectorAll('input');
    for(var inp of inputs){
        if(inp.placeholder || inp.className.toString().length > 10){
            results.push({
                type: inp.type,
                placeholder: inp.placeholder || '',
                class: inp.className.toString().substring(0,60),
                value: inp.value ? inp.value.substring(0,20) : ''
            });
        }
    }
    return JSON.stringify(results.slice(0, 15));
})()
"""
send(sock, {'id':2,'method':'Runtime.evaluate','params':{'expression':expr2}})
r2 = recv(sock)
print('\n所有可能有用的 input:')
print(json.loads(r2)['result']['result']['value'])

sock.close()
