add read to httpclienttransportresponse

sdk/core/azure-core/azure/core/pipeline/transport/_base.py

@@ -537,13 +537,7 @@ def __init__(self, **kwargs):
         self.headers = _case_insensitive_dict(self._internal_response.getheaders())
         self.reason = self._internal_response.reason
         self.content_type = self.headers.get("Content-Type")
-        self._data = None
-
-    @property
-    def content(self):
-        if self._data is None:
-            self._data = self._internal_response.read()
-        return self._data
+        self._content = None
 
 class RestHttpClientTransportResponse(_RestHttpClientTransportResponse, RestHttpResponse):
     """Create a Rest HTTPResponse from an http.client response.
@@ -555,6 +549,11 @@ def iter_bytes(self):
     def iter_raw(self):
         raise TypeError("We do not support iter_raw for this transport response")
 
+    def read(self):
+        if self._content is None:
+            self._content = self._internal_response.read()
+        return self._content
+
 
 class BytesIOSocket(object):
     """Mocking the "makefile" of socket for HTTPResponse.

sdk/core/azure-core/azure/core/pipeline/transport/_base_async.py

@@ -171,6 +171,11 @@ async def iter_bytes(self):
     async def iter_raw(self):
         raise TypeError("We do not support iter_raw for this transport response")
 
+    async def read(self):
+        if self._content is None:
+            self._content = self._internal_response.read()
+        return self._content
+
 
 class AsyncHttpTransport(
     AbstractAsyncContextManager,