Function http_get_json

proxy/csswitch_proxy.py:304–319

GET 上游并解析 JSON（relay 回源拉 /v1/models 用）。连接抖动重试，服务端明确响应不重试。

(url, headers, attempts=3, timeout=30)

def http_get_json(url, headers, attempts=3, timeout=30):
    """GET 上游并解析 JSON（relay 回源拉 /v1/models 用）。连接抖动重试，服务端明确响应不重试。"""
    headers = {"User-Agent": UPSTREAM_UA, **headers}
    for i in range(attempts):
        req = urllib.request.Request(url, headers=headers, method="GET")
        try:
            with urllib.request.urlopen(req, timeout=timeout) as r:
                return json.loads(r.read())
        except urllib.error.HTTPError:
            raise
        except Exception as e:
            if i < attempts - 1:
                log(f"  ~ 上游连接抖动，重试 {i + 1}/{attempts - 1}: {e}")
                time.sleep(0.6 * (i + 1))
                continue
            raise


def normalize_openai_base(base):