{packet,http} allow empty response phrase

Packet type 'http' for erlang:deocode:packet and gen_tcp allow a
response line with an empty phrase string, like
"HTTP/1.1 200\r\n".
Earlier, an empty phrase was only accepted if the status code
was followed by space or tab, like
"HTTP/1.1 200 \r\n".

1 files changed, 1 insertions, 1 deletions

diff --git a/erts/emulator/beam/packet_parser.c b/erts/emulator/beam/packet_parser.c
index 8c8029d450..5bcd567b5f 100644
--- a/erts/emulator/beam/packet_parser.c
+++ b/erts/emulator/beam/packet_parser.c
@@ -679,7 +679,7 @@ int packet_parse_http(const char* buf, int len, int* statep,
             while (n && SP(ptr)) {
                 ptr++; n--;
             }
-            if (ptr==p0) return -1;
+            if (ptr==p0 && n>0) return -1;
             
             /* NOTE: the syntax allows empty reason phrases */
             (*statep) = !0;