对于跨域总是not call back 的问题

本文针对跨域请求中出现的notcallback问题提供了两种解决方案:一是使用async确保AJAX请求异步执行;二是通过将多个AJAX请求封装进函数,并在前一个请求成功后再执行下一个请求,从而避免同步执行导致的问题。

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跨域是一大问题,尤其跨着跨着跨不动了是最骚的,其中***not call back就是一大问题,很多人都是在这边,明明自己的代码都是正确,但是却出现了not callback

这个问题其实很简单,就是ajax请求同步进行了,需要让他们异步一个一个的执行就好了,可以用async,或者还有一种根治的方法也是最保险的就是强制让ajax一个一个执行,可以把ajax写入function里面,然后在function的结尾也就是ajax的success结尾执行下一个ajax,这样就不会出现not callback了

import sys import json import sqlite3 import requests from PyQt5.QtWidgets import (QApplication, QMainWindow, QSplitter, QListWidget, QWidget, QVBoxLayout, QHBoxLayout, QPushButton, QLineEdit, QLabel, QMessageBox, QStatusBar) from PyQt5.QtWebEngineWidgets import QWebEngineView, QWebEngineProfile from PyQt5.QtCore import QUrl, Qt, QTimer from PyQt5.QtNetwork import QNetworkCookie class AccountManager: """账号管理类,处理账号的存储和加载""" def __init__(self, db_name='bilibili_accounts.db'): self.conn = sqlite3.connect(db_name) self.cursor = self.conn.cursor() self._create_table() def _create_table(self): self.cursor.execute(''' CREATE TABLE IF NOT EXISTS accounts ( id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL UNIQUE, cookies TEXT NOT NULL ) ''') self.conn.commit() def add_account(self, name, cookies): """添加新账号""" try: self.cursor.execute( "INSERT INTO accounts (name, cookies) VALUES (?, ?)", (name, json.dumps(cookies)) ) self.conn.commit() return True except sqlite3.IntegrityError: return False def get_accounts(self): """获取所有账号""" self.cursor.execute("SELECT id, name, cookies FROM accounts") return [ {'id': row[0], 'name': row[1], 'cookies': json.loads(row[2])} for row in self.cursor.fetchall() ] def delete_account(self, account_id): """删除账号""" self.cursor.execute("DELETE FROM accounts WHERE id=?", (account_id,)) self.conn.commit() def __del__(self): self.conn.close() class BilibiliBrowser(QMainWindow): def __init__(self): super().__init__() self.setWindowTitle("B站多账号浏览器") self.resize(1200, 800) # 初始化账号管理器 self.account_manager = AccountManager() # 创建UI self.init_ui() # 加载账号列表 self.load_accounts() # 设置状态栏 self.status_bar = QStatusBar() self.setStatusBar(self.status_bar) self.status_bar.showMessage("就绪", 3000) def init_ui(self): """初始化用户界面""" # 主分割布局 main_splitter = QSplitter(Qt.Horizontal) # 左侧账号管理区 account_widget = QWidget() account_layout = QVBoxLayout() # 账号列表 account_layout.addWidget(QLabel("账号列表")) self.account_list = QListWidget() self.account_list.itemClicked.connect(self.switch_account) account_layout.addWidget(self.account_list) # 添加账号区 add_account_layout = QHBoxLayout() self.account_name_input = QLineEdit() self.account_name_input.setPlaceholderText("输入账号名称") add_account_layout.addWidget(self.account_name_input) add_btn = QPushButton("添加账号") add_btn.clicked.connect(self.add_account) add_account_layout.addWidget(add_btn) account_layout.addLayout(add_account_layout) # 删除账号按钮 del_btn = QPushButton("删除选中账号") del_btn.clicked.connect(self.delete_account) account_layout.addWidget(del_btn) # 检测账号状态按钮 check_btn = QPushButton("检测账号状态") check_btn.clicked.connect(self.check_account_status) account_layout.addWidget(check_btn) account_widget.setLayout(account_layout) # 右侧浏览器区 browser_widget = QWidget() browser_layout = QVBoxLayout() # 导航栏 nav_layout = QHBoxLayout() self.url_bar = QLineEdit() self.url_bar.setPlaceholderText("输入网址或搜索内容") self.url_bar.returnPressed.connect(self.navigate_to_url) nav_layout.addWidget(self.url_bar) home_btn = QPushButton("首页") home_btn.clicked.connect(self.go_home) nav_layout.addWidget(home_btn) refresh_btn = QPushButton("刷新") refresh_btn.clicked.connect(self.refresh_page) nav_layout.addWidget(refresh_btn) browser_layout.addLayout(nav_layout) # 浏览器视图 self.browser = QWebEngineView() self.browser.load(QUrl("https://www.bilibili.com")) self.browser.urlChanged.connect(self.update_url_bar) browser_layout.addWidget(self.browser) browser_widget.setLayout(browser_layout) # 添加组件到主分割器 main_splitter.addWidget(account_widget) main_splitter.addWidget(browser_widget) main_splitter.setSizes([300, 900]) self.setCentralWidget(main_splitter) def load_accounts(self): """加载所有账号到列表""" self.account_list.clear() accounts = self.account_manager.get_accounts() for account in accounts: self.account_list.addItem(f"{account['name']} (ID:{account['id']})") def add_account(self): """添加新账号""" account_name = self.account_name_input.text().strip() if not account_name: QMessageBox.warning(self, "输入错误", "请输入账号名称") return # 获取当前浏览器的Cookie cookie_store = self.browser.page().profile().cookieStore() cookies = [] # 使用闭包捕获cookies列表 def capture_cookies(cookie): print(cookie) cookies.append({ 'name': cookie.name().data().decode(), 'value': cookie.value().data().decode(), 'domain': cookie.domain(), 'path': cookie.path(), 'expirationDate': cookie.expirationDate().toSecsSinceEpoch() if cookie.expirationDate().isValid() else None }) # 连接信号捕获Cookie cookie_store.cookieAdded.connect(capture_cookies) # 设置一个定时器来等待Cookie收集完成 QTimer.singleShot(1000, lambda: self.finalize_account_creation(account_name, cookies, cookie_store)) # 提示用户登录 self.browser.load(QUrl("https://passport.bilibili.com/login")) self.status_bar.showMessage("请在浏览器中登录B站账号...", 5000) def finalize_account_creation(self, account_name, cookies, cookie_store): """完成账号创建过程""" # 断开信号连接 cookie_store.cookieAdded.disconnect() print(cookies) # 过滤B站相关Cookie bili_cookies = [c for c in cookies if 'bilibili' in c['domain']] print(bili_cookies) if not bili_cookies: QMessageBox.warning(self, "添加失败", "未检测到有效的B站Cookie") return # 保存账号 if self.account_manager.add_account(account_name, bili_cookies): self.load_accounts() self.account_name_input.clear() self.status_bar.showMessage(f"账号 '{account_name}' 添加成功", 3000) else: QMessageBox.warning(self, "添加失败", "账号名称已存在") def delete_account(self): """删除选中账号""" current_item = self.account_list.currentItem() if not current_item: return account_id = int(current_item.text().split("ID:")[1].strip(")")) self.account_manager.delete_account(account_id) self.load_accounts() self.status_bar.showMessage("账号已删除", 3000) def switch_account(self, item): """切换到选中的账号""" account_id = int(item.text().split("ID:")[1].strip(")")) accounts = self.account_manager.get_accounts() account = next((a for a in accounts if a['id'] == account_id), None) if account: self.apply_cookies(account['cookies']) self.browser.load(QUrl("https://www.bilibili.com")) self.status_bar.showMessage(f"已切换到账号: {account['name']}", 3000) def apply_cookies(self, cookies): """应用Cookie到浏览器""" profile = QWebEngineProfile.defaultProfile() cookie_store = profile.cookieStore() cookie_store.deleteAllCookies() # 清除现有Cookie for cookie_data in cookies: cookie = QNetworkCookie() cookie.setName(cookie_data['name'].encode()) cookie.setValue(cookie_data['value'].encode()) cookie.setDomain(cookie_data['domain']) cookie.setPath(cookie_data['path']) if cookie_data['expirationDate']: cookie.setExpirationDate(cookie_data['expirationDate']) cookie_store.setCookie(cookie) def check_account_status(self): """检查选中账号的状态""" current_item = self.account_list.currentItem() if not current_item: return account_id = int(current_item.text().split("ID:")[1].strip(")")) accounts = self.account_manager.get_accounts() account = next((a for a in accounts if a['id'] == account_id), None) if account: # 使用requests验证Cookie有效性 session = requests.Session() for cookie in account['cookies']: session.cookies.set( cookie['name'], cookie['value'], domain=cookie['domain'], path=cookie['path'] ) try: response = session.get("https://api.bilibili.com/x/web-interface/nav") data = response.json() if data['code'] == 0: uname = data['data']['uname'] self.status_bar.showMessage(f"账号有效: {uname}", 5000) else: self.status_bar.showMessage("账号已失效,请重新登录", 5000) except Exception as e: self.status_bar.showMessage(f"检测失败: {str(e)}", 5000) def navigate_to_url(self): """导航到输入的URL""" url = self.url_bar.text().strip() if not url.startswith(('http://', 'https://')): url = 'https://' + url self.browser.load(QUrl(url)) def update_url_bar(self, q): """更新URL地址栏""" self.url_bar.setText(q.toString()) def go_home(self): """返回B站首页""" self.browser.load(QUrl("https://www.bilibili.com")) def refresh_page(self): """刷新当前页面""" self.browser.reload() if __name__ == "__main__": app = QApplication(sys.argv) browser = BilibiliBrowser() browser.show() sys.exit(app.exec_()) 获取不到cookie请帮我检查修改并且完整返回
07-09
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