Fix http_request:http_headers/1 to send content-length when length is zero

In R16B01, the http_request:http_headers/1 function removes the content-length
field from the HTTP headers if the content length is zero. This results in
some (perhaps many) HTTP servers rejecting POSTs and PUTs without data with
a 411 status word. From RFC2616, section 14.13: "Any Content-Length greater than
or EQUAL to zero is a valid value".

1 files changed, 2 insertions, 7 deletions

diff --git a/lib/inets/src/http_lib/http_request.erl b/lib/inets/src/http_lib/http_request.erl
index c214aca4a4..fbfbe7c632 100644
--- a/lib/inets/src/http_lib/http_request.erl
+++ b/lib/inets/src/http_lib/http_request.erl
@@ -248,13 +248,8 @@ key_value_str(Key = 'content-language', Headers) ->
     key_value_str(atom_to_list(Key), 
 		    Headers#http_request_h.'content-language');
 key_value_str(Key = 'content-length', Headers) ->
-    case Headers#http_request_h.'content-length' of
-	"0" ->
-	    undefined;
-	_ -> 
-	    key_value_str(atom_to_list(Key), 
-			    Headers#http_request_h.'content-length')
-    end;
+    key_value_str(atom_to_list(Key), 
+		    Headers#http_request_h.'content-length');
 key_value_str(Key = 'content-location', Headers) ->
     key_value_str(atom_to_list(Key),
 		    Headers#http_request_h.'content-location');