Comply with latest token format

Author: Viicos

logfire/_internal/config.py

@@ -115,6 +115,7 @@
 COMMON_REQUEST_HEADERS = {'User-Agent': f'logfire/{VERSION}'}
 """Common request headers for requests to the Logfire API."""
 PROJECT_NAME_PATTERN = r'^[a-z0-9]+(?:-[a-z0-9]+)*$'
+PYDANTIC_LOGFIRE_TOKEN_PATTERN = re.compile(r'^pylf_v(?P<version>[0-9]+)_(?P<region>[a-z]+)_(?P<token>[a-zA-Z0-9]+)$')
 
 METRICS_PREFERRED_TEMPORALITY = {
     Counter: AggregationTemporality.DELTA,
@@ -173,18 +174,20 @@ class AdvancedOptions:
     """Configuration for OpenTelemetry logging. This is experimental and may be removed."""
 
     def generate_base_url(self, token: str | None) -> str:
-        if token and '-' in token:
-            region, _ = token.split('-', maxsplit=1)
-        else:
-            region = None
         if self.base_url is not None:
             return self.base_url
-        if region:
-            return f'https://api-{region}.pydantic.dev'
-        else:
-            # default to us region for tokens that were created before regions were added
+
+        if token is None:
+            # default to US region if no token is provided:
             return 'https://logfire-api.pydantic.dev'
 
+        match = PYDANTIC_LOGFIRE_TOKEN_PATTERN.match(token)
+        if not match:
+            # default to US region for tokens that were created before regions were added:
+            return 'https://logfire-api.pydantic.dev'
+
+        return f'https://api-{match.group("region")}.pydantic.dev'
+
 
 @dataclass
 class PydanticPlugin:

logfire/_internal/config_params.py

@@ -99,9 +99,9 @@ class _DefaultCallback:
 IGNORE_NO_CONFIG = ConfigParam(env_vars=['LOGFIRE_IGNORE_NO_CONFIG'], allow_file_config=True, default=False, tp=bool)
 """Whether to show a warning message if logfire if used without calling logfire.configure()"""
 BASE_URL = ConfigParam(env_vars=['LOGFIRE_BASE_URL'], allow_file_config=True, default=None, tp=Union[str, None])
+"""The base URL of the Logfire backend. Primarily for testing purposes."""
 REGION = ConfigParam(env_vars=['LOGFIRE_REGION'], allow_file_config=True, default='us')
 """The region of the Logfire backend."""
-"""The base URL of the Logfire backend. Primarily for testing purposes."""
 DISTRIBUTED_TRACING = ConfigParam(env_vars=['LOGFIRE_DISTRIBUTED_TRACING'], allow_file_config=True, default=None, tp=bool)
 """Whether to extract incoming trace context. By default, will extract but warn about it."""
 # fmt: on