Permit urllib3.Timeout instances for defining timeout values.

Using that, you can configure both the socket `connect` and `read`
timeout settings, in seconds.

CHANGES.txt

@@ -5,6 +5,10 @@ Changes for crate
 Unreleased
 ==========
 
+- Permit ``urllib3.Timeout`` instances for defining timeout values.
+  This way, both ``connect`` and ``read`` socket timeout settings can be
+  configured. The unit is seconds.
+
 
 2023/09/29 0.34.0
 =================

docs/by-example/client.rst

@@ -48,12 +48,25 @@ traceback if a server error occurs:
     >>> connection = client.connect([crate_host], error_trace=True)
     >>> connection.close()
 
+Network Timeouts
+----------------
+
 It's possible to define a default timeout value in seconds for all servers
-using the optional parameter ``timeout``:
+using the optional parameter ``timeout``. In this case, it will serve as a
+total timeout (connect and read):
 
     >>> connection = client.connect([crate_host, invalid_host], timeout=5)
     >>> connection.close()
 
+If you want to adjust the connect- vs. read-timeout values individually,
+please use the ``urllib3.Timeout`` object like:
+
+    >>> import urllib3
+    >>> connection = client.connect(
+    ...     [crate_host, invalid_host],
+    ...     timeout=urllib3.Timeout(connect=5, read=None))
+    >>> connection.close()
+
 Authentication
 --------------
 

docs/by-example/http.rst

@@ -199,8 +199,8 @@ timeout exception:
     {...}
     >>> http_client.close()
 
-It's possible to define a HTTP timeout in seconds on client instantiation, so
-an exception is raised when the timeout is reached:
+It is possible to define a HTTP timeout in seconds when creating a client
+object, so an exception is raised when the timeout expires:
 
     >>> http_client = HttpClient(crate_host, timeout=0.01)
     >>> http_client.sql('select fib(32)')
@@ -209,6 +209,17 @@ an exception is raised when the timeout is reached:
     crate.client.exceptions.ConnectionError: No more Servers available, exception from last server: ...
     >>> http_client.close()
 
+In order to adjust the connect- vs. read-timeout values individually,
+please use the ``urllib3.Timeout`` object like:
+
+    >>> import urllib3
+    >>> http_client = HttpClient(crate_host, timeout=urllib3.Timeout(connect=1.11, read=0.01))
+    >>> http_client.sql('select fib(32)')
+    Traceback (most recent call last):
+    ...
+    crate.client.exceptions.ConnectionError: No more Servers available, exception from last server: ...
+    >>> http_client.close()
+
 When connecting to non-CrateDB servers, the HttpClient will raise a ConnectionError like this:
 
     >>> http_client = HttpClient(["https://example.org/"])

src/crate/client/http.py

@@ -273,7 +273,9 @@ def _pool_kw_args(verify_ssl_cert, ca_cert, client_cert, client_key,
         'key_file': client_key,
     }
     if timeout is not None:
-        kw['timeout'] = float(timeout)
+        if isinstance(timeout, str):
+            timeout = float(timeout)
+        kw['timeout'] = timeout
     if pool_size is not None:
         kw['maxsize'] = int(pool_size)
     return kw

src/crate/client/test_connection.py

@@ -1,5 +1,7 @@
 import datetime
 
+from urllib3 import Timeout
+
 from .connection import Connection
 from .http import Client
 from crate.client import connect
@@ -72,3 +74,25 @@ def test_with_timezone(self):
         cursor = connection.cursor()
         self.assertEqual(cursor.time_zone.tzname(None), "UTC")
         self.assertEqual(cursor.time_zone.utcoffset(None), datetime.timedelta(0))
+
+    def test_timeout_float(self):
+        """
+        Verify setting the timeout value as a scalar (float) works.
+        """
+        with connect('localhost:4200', timeout=2.42) as conn:
+            self.assertEqual(conn.client._pool_kw["timeout"], 2.42)
+
+    def test_timeout_string(self):
+        """
+        Verify setting the timeout value as a scalar (string) works.
+        """
+        with connect('localhost:4200', timeout="2.42") as conn:
+            self.assertEqual(conn.client._pool_kw["timeout"], 2.42)
+
+    def test_timeout_object(self):
+        """
+        Verify setting the timeout value as a Timeout object works.
+        """
+        timeout = Timeout(connect=2.42, read=0.01)
+        with connect('localhost:4200', timeout=timeout) as conn:
+            self.assertEqual(conn.client._pool_kw["timeout"], timeout)