Support identity transfer-encoding in httpc

> The default (identity) encoding; the use of no transformation whatsoever.

> The Internet Assigned Numbers Authority (IANA) acts as a registry for
> transfer-coding value tokens. Initially, the registry contains the
> following tokens: "chunked" (section 3.6.1), "identity" (section 3.6.2),
> "gzip" (section 3.5), "compress" (section 3.5), and "deflate" (section 3.5).

Reported-by: Andrew Houghton

2 files changed, 24 insertions, 10 deletions

diff --git a/lib/inets/src/http_client/httpc_handler.erl b/lib/inets/src/http_client/httpc_handler.erl
index a89a457a51..03cd9aac44 100644
--- a/lib/inets/src/http_client/httpc_handler.erl
+++ b/lib/inets/src/http_client/httpc_handler.erl
@@ -1119,15 +1119,8 @@ handle_http_body(Body, #state{headers       = Headers,
 		    handle_response(State#state{headers = NewHeaders, 
 						body    = NewBody})
 	    end;
-        Encoding when is_list(Encoding) ->
-	    ?hcrt("handle_http_body - encoding", [{encoding, Encoding}]),
-	    NewState = answer_request(Request, 
-				      httpc_response:error(Request, 
-							   unknown_encoding),
-				      State),
-	    {stop, normal, NewState};
-        _ ->
-	    ?hcrt("handle_http_body - other", []),
+        Enc when Enc =:= "identity"; Enc =:= undefined ->
+            ?hcrt("handle_http_body - identity", []),
             Length =
                 list_to_integer(Headers#http_response_h.'content-length'),
             case ((Length =< MaxBodySize) orelse (MaxBodySize =:= nolimit)) of
@@ -1149,7 +1142,14 @@ handle_http_body(Body, #state{headers       = Headers,
 							    body_too_big),
 				       State),
                     {stop, normal, NewState}
-            end
+            end;
+        Encoding when is_list(Encoding) ->
+            ?hcrt("handle_http_body - other", [{encoding, Encoding}]),
+            NewState = answer_request(Request,
+                                      httpc_response:error(Request,
+                                                           unknown_encoding),
+                                      State),
+            {stop, normal, NewState}
     end.
 
 handle_response(#state{status = new} = State) ->
diff --git a/lib/inets/test/httpc_SUITE.erl b/lib/inets/test/httpc_SUITE.erl
index fe6edd504e..a4b24919a1 100644
--- a/lib/inets/test/httpc_SUITE.erl
+++ b/lib/inets/test/httpc_SUITE.erl
@@ -104,6 +104,7 @@ only_simulated() ->
      remote_socket_close,
      remote_socket_close_async,
      transfer_encoding,
+     transfer_encoding_identity,
      redirect_loop,
      redirect_moved_permanently,
      redirect_multiple_choises,
@@ -624,6 +625,12 @@ transfer_encoding(Config) when is_list(Config) ->
 
 %%-------------------------------------------------------------------------
 
+transfer_encoding_identity(Config) when is_list(Config) ->
+    URL = url(group_name(Config), "/identity_transfer_encoding.html", Config),
+    {ok, {{_,200,_}, [_|_], "IDENTITY"}} = httpc:request(URL).
+
+%%-------------------------------------------------------------------------
+
 empty_response_header() ->
     [{doc, "Test the case that the HTTP server does not send any headers. Solves OTP-6830"}].
 empty_response_header(Config) when is_list(Config) ->
@@ -1609,6 +1616,13 @@ handle_uri(_,"/capital_transfer_encoding.html",_,_,Socket,_) ->
     send(Socket, http_chunk:encode("obar</BODY></HTML>")),
     http_chunk:encode_last();
 
+handle_uri(_,"/identity_transfer_encoding.html",_,_,_,_) ->
+    "HTTP/1.0 200 OK\r\n"
+    "Transfer-Encoding:identity\r\n"
+    "Content-Length:8\r\n"
+    "\r\n"
+    "IDENTITY";
+
 handle_uri(_,"/cookie.html",_,_,_,_) ->
     "HTTP/1.1 200 ok\r\n" ++
 	"set-cookie:" ++ "test_cookie=true; path=/;" ++