HTTP: retry failed HEAD requests too

Mark's new document about HTTP Retries
(https://mnot.github.io/I-D/httpbis-retry/) made me check our code and I
spotted that we don't retry failed HEAD requests which seems totally
inconsistent and I can't see any reason for that separate treatment.

So, no separate treatment for HEAD starting now. A HTTP request sent
over a reused connection that gets cut off before a single byte is
received will be retried on a fresh connection.

Made-aware-by: Mark Nottingham

1 files changed, 6 insertions, 7 deletions

diff --git a/lib/transfer.c b/lib/transfer.c
index 82a961f0e..e4a2835f8 100644
--- a/lib/transfer.c
+++ b/lib/transfer.c
@@ -1890,13 +1890,12 @@ CURLcode Curl_retry_request(struct connectdata *conn,
     return CURLE_OK;
 
   if((data->req.bytecount + data->req.headerbytecount == 0) &&
-      conn->bits.reuse &&
-      !data->set.opt_no_body &&
-      (data->set.rtspreq != RTSPREQ_RECEIVE)) {
-    /* We got no data, we attempted to re-use a connection and yet we want a
-       "body". This might happen if the connection was left alive when we were
-       done using it before, but that was closed when we wanted to read from
-       it again. Bad luck. Retry the same request on a fresh connect! */
+     conn->bits.reuse &&
+     (data->set.rtspreq != RTSPREQ_RECEIVE)) {
+    /* We didn't get a single byte when we attempted to re-use a
+       connection. This might happen if the connection was left alive when we
+       were done using it before, but that was closed when we wanted to use it
+       again. Bad luck. Retry the same request on a fresh connect! */
     infof(conn->data, "Connection died, retrying a fresh connect\n");
     *url = strdup(conn->data->change.url);
     if(!*url)