[mod_proxy] use case-insensitive comparision to filter headers, send Connection: Close to backend (fixes #421)

From: Stefan Bühler <stbuehler@web.de>

git-svn-id: svn://svn.lighttpd.net/lighttpd/branches/lighttpd-1.4.x@3093 152afb58-edef-0310-8abb-c4023f1b3aa9

NEWS

@@ -23,6 +23,7 @@ NEWS
   * [mod_cgi] consolidate CGI cleanup code
   * [mod_cgi] simplify mod_cgi_handle_subrequest()
   * [mod_cgi] kill CGI if fail to write request body
+  * [mod_proxy] use case-insensitive comparision to filter headers, send Connection: Close to backend (fixes #421)
 
 - 1.4.39 - 2016-01-02
   * [core] fix memset_s call (fixes #2698)

src/mod_proxy.c

@@ -490,8 +490,8 @@ static int proxy_create_env(server *srv, handler_ctx *hctx) {
 		ds = (data_string *)con->request.headers->data[i];
 
 		if (!buffer_is_empty(ds->value) && !buffer_is_empty(ds->key)) {
-			if (buffer_is_equal_string(ds->key, CONST_STR_LEN("Connection"))) continue;
-			if (buffer_is_equal_string(ds->key, CONST_STR_LEN("Proxy-Connection"))) continue;
+			if (buffer_is_equal_caseless_string(ds->key, CONST_STR_LEN("Connection"))) continue;
+			if (buffer_is_equal_caseless_string(ds->key, CONST_STR_LEN("Proxy-Connection"))) continue;
 
 			buffer_append_string_buffer(b, ds->key);
 			buffer_append_string_len(b, CONST_STR_LEN(": "));
@@ -500,7 +500,7 @@ static int proxy_create_env(server *srv, handler_ctx *hctx) {
 		}
 	}
 
-	buffer_append_string_len(b, CONST_STR_LEN("\r\n"));
+	buffer_append_string_len(b, CONST_STR_LEN("Connection: close\r\n\r\n"));
 
 	chunkqueue_append_buffer(hctx->wb, b);
 	buffer_free(b);