Initial: multi-agent XMPP communication system with dashboard
- Platform-based architecture (Windows/Linux/Mac) - Agent instance registry (agents.yaml) - Management dashboard with cross-platform monitoring - xmpp_bot with HTTP bridge + health endpoints - wechat_agent with WeChat-Hermes bridging - Platform services: ProcessGuardian, HealthProbe, APIRouter, ChannelBridge - Deployment: systemd (Linux) + PowerShell (Windows) - Monitoring: SSH+ejabberdctl for cross-platform presence
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"""
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api_proxy.py — 多 upstream API 错误码吞掉代理
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监听本地端口，转发请求到 upstream API。
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- 2xx: 透传，完全透明
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- 429/5xx: 自动重试最多 3 次（指数退避 1s/2s/4s）
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- 重试耗尽: 返回假 200，错误信息嵌入响应文本
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→ opencode 永远看不到 HTTP 错误码，retry-cache 永不触发
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支持多 upstream 路由:
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volcengine / opencode-go-new — 按模型名自动选择
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"""
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import os, sys, json, time, logging
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from http.server import HTTPServer, BaseHTTPRequestHandler
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from urllib.request import Request, urlopen, HTTPError
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from urllib.error import URLError
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# ── 项目根目录 ──────────────────────────────────────────────
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PROJECT_ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
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sys.path.insert(0, os.path.join(PROJECT_ROOT, "scripts"))
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from proc_guard import guard # PID 锁
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# ── 配置 ────────────────────────────────────────────────────
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LISTEN_HOST = "0.0.0.0"
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LISTEN_PORT = 8787
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MAX_RETRIES = 3
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RETRY_DELAYS = [1, 2, 4] # seconds
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# upstream 路由表: 名称 → base URL + API key
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UPSTREAMS = {
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"volcengine": {
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"base_url": "https://ark.cn-beijing.volces.com/api/coding/v3",
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"api_key": "b0359bed-09f2-49e2-a53c-32ba057412e3",
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},
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"opencode-go-new": {
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"base_url": "https://opencode.ai/zen/go/v1",
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"api_key": "sk-5miR8xAMhlaXWJz3kXoYPub4ZSUISr8Fy3BXN7teThGkWonQAjZmeJdMu17htGTB",
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},
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"opencode-go-old": {
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"base_url": "https://opencode.ai/zen/go/v1",
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"api_key": "sk-MBLGxsGQU1Ngr1M7DKMt1TiCKvOEdKiwClwiUTcOPJKRZ4wbrgKZ25l3dHmvozhj",
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},
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}
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# 模型路由: 模型名 → 走哪个 upstream
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# 支持 volcengine 原生模型名（如 deepseek-v4-flash）也支持 proxy 安全名（如 deepseek-v4-flash-go-safe）
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MODEL_ROUTES = {
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"deepseek-v4-flash-safe": "volcengine",
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"deepseek-v4-pro-safe": "volcengine",
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"deepseek-v4-flash-go-safe": "opencode-go-new",
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"deepseek-v4-pro-go-safe": "opencode-go-new",
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# volcengine 原生模型名 → 走 opencode-go（劫持 volcengine baseURL 后使用）
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"deepseek-v4-flash": "opencode-go-new",
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"deepseek-v4-pro": "opencode-go-new",
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}
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# 模型名映射: 安全名 → upstream 真正用的名称
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MODEL_MAP = {
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"deepseek-v4-flash-safe": "deepseek-v4-flash",
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"deepseek-v4-pro-safe": "deepseek-v4-pro",
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"deepseek-v4-flash-go-safe": "deepseek-v4-flash",
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"deepseek-v4-pro-go-safe": "deepseek-v4-pro",
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}
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# 默认 upstream（当模型名不在路由表中时）
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DEFAULT_UPSTREAM = "volcengine"
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LOG_DIR = os.path.join(PROJECT_ROOT, "logs")
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os.makedirs(LOG_DIR, exist_ok=True)
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logging.basicConfig(
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level=logging.INFO,
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format="%(asctime)s [%(levelname)s] %(message)s",
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handlers=[
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logging.FileHandler(os.path.join(LOG_DIR, "api_proxy.log"), encoding="utf-8"),
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logging.StreamHandler(),
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],
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)
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log = logging.getLogger("api_proxy")
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def make_fake_response(model: str, error_text: str, stream: bool) -> tuple:
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"""构造假 200 响应，把错误信息嵌入文案。"""
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content = f"[api_proxy] upstream API 请求失败（{MAX_RETRIES} 次重试均未成功）。原始错误: {error_text}"
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if stream:
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fake_chunks = [
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f'data: {{"choices":[{{"delta":{{"role":"assistant","content":""}},"index":0}}]}}\n\n',
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f'data: {{"choices":[{{"delta":{{"content":{json.dumps(content)}}},"index":0}}]}}\n\n',
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f"data: [DONE]\n\n",
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]
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body = "".join(fake_chunks).encode("utf-8")
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return body, "text/event-stream"
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else:
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resp = {
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"id": "api_proxy_error_fallback",
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"object": "chat.completion",
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"created": int(time.time()),
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"model": model,
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"choices": [
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{
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"index": 0,
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"message": {"role": "assistant", "content": content},
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"finish_reason": "stop",
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}
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],
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"usage": {"prompt_tokens": 0, "completion_tokens": 0, "total_tokens": 0},
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}
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return json.dumps(resp, ensure_ascii=False).encode("utf-8"), "application/json"
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class ProxyHandler(BaseHTTPRequestHandler):
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"""HTTP 请求代理处理器。"""
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# 禁止 BaseHTTPRequestHandler 写日志到 stderr（我们自己记）
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def log_message(self, format, *args):
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pass
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def do_GET(self):
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self._handle_request("GET")
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def do_POST(self):
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self._handle_request("POST")
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def do_DELETE(self):
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self._handle_request("DELETE")
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def _handle_request(self, method):
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start = time.time()
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req_id = f"{method}{self.path}"[:80]
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log.info("→ %s %s", method, self.path)
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# 读取请求体
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content_length = int(self.headers.get("Content-Length", 0))
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body = self.rfile.read(content_length) if content_length > 0 else b""
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# 解析模型名、路由和流式标记
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is_stream = False
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model_in = ""
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upstream_name = DEFAULT_UPSTREAM
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if body:
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try:
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req_json = json.loads(body)
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is_stream = req_json.get("stream", False)
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model_in = req_json.get("model", "")
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# 根据模型名选 upstream
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upstream_name = MODEL_ROUTES.get(model_in, DEFAULT_UPSTREAM)
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# 模型名映射: 安全名 → 真实 upstream 名
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if model_in in MODEL_MAP:
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real_model = MODEL_MAP[model_in]
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req_json["model"] = real_model
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body = json.dumps(req_json, ensure_ascii=False).encode("utf-8")
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log.info(" model remap: %s → %s (upstream: %s)", model_in, real_model, upstream_name)
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except (json.JSONDecodeError, UnicodeDecodeError):
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pass
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# 构建 upstream URL（从路由表选 base URL）
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upstream_cfg = UPSTREAMS.get(upstream_name, UPSTREAMS[DEFAULT_UPSTREAM])
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upstream_url = upstream_cfg["base_url"] + self.path
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# 准备转发的头部（过滤 hop-by-hop 头）
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excluded_headers = {
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"host", "connection", "keep-alive", "proxy-authenticate",
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"proxy-authorization", "te", "trailers", "transfer-encoding",
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"upgrade", "content-length", "content-encoding",
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}
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upstream_headers = {
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k: v for k, v in self.headers.items()
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if k.lower() not in excluded_headers
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}
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# 用 upstream 自己的 API key 覆盖客户端传过来的
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if "api_key" in upstream_cfg:
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upstream_headers["Authorization"] = f"Bearer {upstream_cfg['api_key']}"
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last_error = ""
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last_status = 0
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for attempt in range(1, MAX_RETRIES + 1):
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try:
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upstream_headers.pop("Content-Length", None)
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req = Request(upstream_url, data=body, headers=upstream_headers, method=method)
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with urlopen(req, timeout=120) as resp:
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# 成功 — 透传
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status = resp.status
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if status < 400:
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resp_body = resp.read()
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self._send_response(status, resp.headers, resp_body)
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elapsed = time.time() - start
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log.info("✓ %s %s → %d (%.2fs)", method, self.path, status, elapsed)
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return
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# 4xx/5xx — 记录准备重试
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last_status = status
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last_error = f"HTTP {status}: {resp.read().decode('utf-8', errors='replace')[:500]}"
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log.warning("⚠ attempt %d/%d: %s", attempt, MAX_RETRIES, last_error)
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except HTTPError as e:
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last_status = e.code
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last_error = f"HTTP {e.code}: {e.read().decode('utf-8', errors='replace')[:500]}"
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log.warning("⚠ attempt %d/%d: %s", attempt, MAX_RETRIES, last_error)
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except URLError as e:
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last_status = 0
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last_error = f"URLError: {e.reason}"
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log.warning("⚠ attempt %d/%d: %s", attempt, MAX_RETRIES, last_error)
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except Exception as e:
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last_status = 0
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last_error = f"Exception: {e}"
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log.warning("⚠ attempt %d/%d: %s", attempt, MAX_RETRIES, last_error)
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# 最后一次尝试失败了，不 sleep
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if attempt < MAX_RETRIES:
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delay = RETRY_DELAYS[min(attempt - 1, len(RETRY_DELAYS) - 1)]
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log.info(" sleep %ds before retry %d/%d", delay, attempt + 1, MAX_RETRIES)
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time.sleep(delay)
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# ── 所有重试耗尽，返回假 200 ──
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model_name = "unknown"
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if body:
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try:
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req_json = json.loads(body)
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model_name = req_json.get("model", "unknown")
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except Exception:
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pass
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log.warning("✗ %s %s — 重试耗尽, model=%s, error=%s", method, self.path, model_name, last_error)
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fake_body, content_type = make_fake_response(model_name, last_error, is_stream)
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fake_headers = {
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"Content-Type": content_type,
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"Access-Control-Allow-Origin": "*",
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"Cache-Control": "no-cache",
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}
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self._send_response(200, fake_headers, fake_body)
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elapsed = time.time() - start
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log.info("✗ %s %s → fake 200 (%.2fs)", method, self.path, elapsed)
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def _send_response(self, status: int, headers, body: bytes):
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"""发送响应给客户端。"""
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self.send_response(status)
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# 透传安全/有用的响应头
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allowed = {"content-type", "content-encoding", "cache-control",
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"x-request-id", "x-ratelimit-remaining", "x-ratelimit-reset",
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"access-control-allow-origin"}
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if isinstance(headers, dict):
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for k, v in headers.items():
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if k.lower() in allowed:
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self.send_header(k, v)
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else:
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# http.client.HTTPMessage 对象
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for k, v in headers.items():
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if k.lower() in allowed:
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self.send_header(k, v)
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self.send_header("Content-Length", str(len(body)))
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self.end_headers()
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self.wfile.write(body)
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self.wfile.flush()
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def main():
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# PID 锁
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g = guard("api_proxy")
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if not g.ok:
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log.error("api_proxy 已有实例在运行 (PID %s)，退出", g.pid)
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sys.exit(1)
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server = HTTPServer((LISTEN_HOST, LISTEN_PORT), ProxyHandler)
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log.info("api_proxy 启动 → http://%s:%d", LISTEN_HOST, LISTEN_PORT)
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for name, cfg in UPSTREAMS.items():
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log.info(" upstream [%s]: %s", name, cfg["base_url"])
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log.info("retry: %d 次, 退避 %s", MAX_RETRIES, RETRY_DELAYS)
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log.info("重试耗尽后返回 fake 200（opencode retry-cache 永不触发）")
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try:
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server.serve_forever()
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except KeyboardInterrupt:
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log.info("收到中断信号，关闭服务器...")
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server.shutdown()
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if __name__ == "__main__":
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main()
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