Allow setting websockets to use binary

Signed-off-by: Nijat K <nijat.khanbabayev@gmail.com>

cpp/csp/adapters/websocket/WebsocketEndpoint.h

@@ -232,6 +232,8 @@ class WebsocketSessionNoTLS final: public WebsocketSession<WebsocketSessionNoTLS
                                     self->m_on_fail(ec.message());
                                     return;
                                 }
+                                if( self->m_properties->get<bool>("binary") )
+                                    self->m_ws.binary( true );
                                 self->m_on_open();
                                 self->m_ws.async_read(
                                     self->m_buffer,
@@ -339,6 +341,8 @@ class WebsocketSessionTLS final: public WebsocketSession<WebsocketSessionTLS> {
                                             self->m_on_fail(ec.message());
                                             return;
                                         }
+                                        if( self->m_properties->get<bool>("binary") )
+                                            self->m_ws.binary( true );
                                         self->m_on_open();
                                         self->m_ws.async_read(
                                             self->m_buffer,

csp/adapters/websocket.py

@@ -423,6 +423,7 @@ def __init__(
         dynamic: bool = False,
         connection_request: Optional[ConnectionRequest] = None,
         num_threads: int = 1,
+        binary: bool = False,
     ):
         """
         uri: str
@@ -436,9 +437,11 @@ def __init__(
         num_threads: int = 1
             Determines number of threads to allocate for running the websocket endpoints.
             Defaults to 1 to avoid thread switching
+        binary: bool = False
+            Whether to send/receive text or binary data
         """
 
-        self._properties = dict(dynamic=dynamic, num_threads=num_threads)
+        self._properties = dict(dynamic=dynamic, num_threads=num_threads, binary=binary)
         # Enumerating for clarity
         if connection_request is not None and uri is not None:
             raise ValueError("'connection_request' cannot be set along with 'uri'")
@@ -485,6 +488,7 @@ def _get_properties(self, conn_request: ConnectionRequest) -> dict:
             on_connect_payload=conn_request.on_connect_payload,
             uri=uri,
             dynamic=self._dynamic,
+            binary=self._properties.get("binary", False),
         )
         return res
 

csp/tests/adapters/test_websocket.py

@@ -30,6 +30,9 @@ def on_message(self, msg):
             # Carve-out to allow inspecting the headers
             if msg == "header1":
                 msg = self.request.headers.get(msg, "")
+            elif not isinstance(msg, str) and msg.decode("utf-8") == "header1":
+                # Need this for bytes
+                msg = self.request.headers.get("header1", "")
             return self.write_message(msg)
 
     @contextmanager
@@ -98,11 +101,12 @@ def g():
         msgs = csp.run(g, starttime=datetime.now(pytz.UTC), realtime=True)
         assert msgs["recv"][0][1] == "Hello, World!"
 
-    def test_headers(self):
+    @pytest.mark.parametrize("binary", [False, True])
+    def test_headers(self, binary):
         @csp.graph
         def g(dynamic: bool):
             if dynamic:
-                ws = WebsocketAdapterManager(dynamic=True)
+                ws = WebsocketAdapterManager(dynamic=True, binary=binary)
                 # Connect with header
                 conn_request1 = csp.const(
                     [