|
|
|
|
|
|
| """统一浏览器 headers 生成。
|
|
|
| 提供 build_dynamic_headers() 作为唯一入口。
|
|
|
| ⚠️ 此处只生成真实浏览器同源 fetch 请求中实际带的最小集合，避免被阿里云 ESA/WAF
|
| 按"非浏览器指纹"判别拦截（参见 chat.z.ai 抓包对比）。
|
| - 不发 Origin（同源请求浏览器不发）
|
| - 不发 Cache-Control / Pragma / Connection（fetch 不发）
|
| - 不发 Sec-Fetch-*（fetch 自身管理，写死反而成为指纹）
|
| - 不发 Referer 路径（chat.z.ai 前端的 referrer policy 让其为空）
|
| """
|
|
|
| import random
|
| from typing import Dict
|
|
|
| from app.utils.user_agent import get_random_user_agent
|
|
|
|
|
| def build_dynamic_headers(fe_version: str, chat_id: str = "") -> Dict[str, str]:
|
| """生成上游请求所需的最小浏览器 headers。
|
|
|
| Args:
|
| fe_version: 前端版本号，填充到 X-FE-Version header。
|
| chat_id: 当前对话 ID（保留参数以兼容现有调用方，不再用于构造 Referer）。
|
|
|
| Returns:
|
| 与真实浏览器同源 fetch 一致的最小 header 集合。
|
| Firefox UA 不带 sec-ch-ua 系列；Chromium 系带。
|
| """
|
| del chat_id
|
| browser_choices = ["chrome", "chrome", "chrome", "edge", "edge", "firefox", "safari"]
|
| browser_type = random.choice(browser_choices)
|
| user_agent = get_random_user_agent(browser_type)
|
|
|
| chrome_version = "139"
|
| edge_version = "139"
|
|
|
| if "Chrome/" in user_agent:
|
| try:
|
| chrome_version = user_agent.split("Chrome/")[1].split(".")[0]
|
| except Exception:
|
| pass
|
|
|
| if "Edg/" in user_agent:
|
| try:
|
| edge_version = user_agent.split("Edg/")[1].split(".")[0]
|
| sec_ch_ua = (
|
| f'"Microsoft Edge";v="{edge_version}", '
|
| f'"Chromium";v="{chrome_version}", "Not_A Brand";v="24"'
|
| )
|
| except Exception:
|
| sec_ch_ua = (
|
| f'"Not_A Brand";v="8", "Chromium";v="{chrome_version}", '
|
| f'"Google Chrome";v="{chrome_version}"'
|
| )
|
| elif "Firefox/" in user_agent:
|
| sec_ch_ua = None
|
| else:
|
| sec_ch_ua = (
|
| f'"Not_A Brand";v="8", "Chromium";v="{chrome_version}", '
|
| f'"Google Chrome";v="{chrome_version}"'
|
| )
|
|
|
| if "Windows" in user_agent:
|
| platform = '"Windows"'
|
| elif "Macintosh" in user_agent or "Mac OS X" in user_agent:
|
| platform = '"macOS"'
|
| elif "Linux" in user_agent:
|
| platform = '"Linux"'
|
| else:
|
| platform = '"Windows"'
|
|
|
| headers: Dict[str, str] = {
|
| "Content-Type": "application/json",
|
| "User-Agent": user_agent,
|
| "Accept-Language": "en-US",
|
| "X-FE-Version": fe_version,
|
| "X-Region": "overseas",
|
| }
|
|
|
| if sec_ch_ua:
|
| headers["sec-ch-ua"] = sec_ch_ua
|
| headers["sec-ch-ua-mobile"] = "?0"
|
| headers["sec-ch-ua-platform"] = platform
|
|
|
| return headers
|
|
|
