Allows for custom/any HTTP method (other than POST) (#76)

Author: MonsieurV

gql/transport/requests.py

@@ -29,6 +29,7 @@ def __init__(
         timeout=None,  # type: int
         verify=True,  # type: bool
         retries=0,  # type: int
+        method="POST",  # type: str
         **kwargs  # type: Any
     ):
         """Initialize the transport with the given request parameters.
@@ -43,6 +44,7 @@ def __init__(
             the server's TLS certificate, or a string, in which case it must be a path
             to a CA bundle to use. (Default: True).
         :param retries: Pre-setup of the requests' Session for performing retries
+        :param method: HTTP method used for requests. (Default: POST).
         :param kwargs: Optional arguments that ``request`` takes. These can be seen at the :requests_: source code
             or the official :docs_:
 
@@ -56,6 +58,7 @@ def __init__(
         self.use_json = use_json
         self.default_timeout = timeout
         self.verify = verify
+        self.method = method
         self.kwargs = kwargs
 
         # Creating a session that can later be re-use to configure custom mechanisms
@@ -101,7 +104,7 @@ def execute(self, document, variable_values=None, timeout=None):
         post_args.update(self.kwargs)
 
         # Using the created session to perform requests
-        response = self.session.post(self.url, **post_args)  # type: ignore
+        response = self.session.request(self.method, self.url, **post_args)  # type: ignore
         try:
             result = response.json()
             if not isinstance(result, dict):

tests/test_client.py

@@ -167,6 +167,37 @@ def test_http_transport_verify_error(http_transport_query):
     assert "Unverified HTTPS request is being made to host" in str(record[0].message)
 
 
+def test_http_transport_specify_method_valid(http_transport_query):
+    client = Client(
+        transport=RequestsHTTPTransport(
+            url="https://countries.trevorblades.com/",
+            use_json=True,
+            headers={"Content-type": "application/json"},
+            method="POST",
+        )
+    )
+
+    result = client.execute(http_transport_query)
+    client.close()
+    assert result is not None
+
+
+def test_http_transport_specify_method_invalid(http_transport_query):
+    client = Client(
+        transport=RequestsHTTPTransport(
+            url="https://countries.trevorblades.com/",
+            use_json=True,
+            headers={"Content-type": "application/json"},
+            method="GET",
+        )
+    )
+
+    with pytest.raises(Exception) as exc_info:
+        client.execute(http_transport_query)
+    client.close()
+    assert "400 Client Error: Bad Request for url" in str(exc_info.value)
+
+
 def test_gql():
     sample_path = os.path.join(
         os.path.dirname(os.path.abspath(__file__)),