[FFmpeg-cvslog] avformat/http: Return EIO for prematurely broken connection

[Ulrik]

ffmpeg | branch: master | Ulrik <ulrikm at spotify.com> | Mon Jul 27 11:46:56 2020 +0200| [1306e5c7d3107f00208b924af6caff8408c14902] | committer: Tomas Härdin

avformat/http: Return EIO for prematurely broken connection

Currently, a prematurely broken connection normally leads to the same
EOF, as a completed successful transfer. However, enabling reconnect
changes this logic, and leads to the return of EIO.

This patch unifies that logic, leading to the return of EIO for premature
disconnect, regardless of setting of "reconnect".

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=1306e5c7d3107f00208b924af6caff8408c14902
---

 libavformat/http.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/libavformat/http.c b/libavformat/http.c
index ec60bc0b17..65ea5d993c 100644
--- a/libavformat/http.c
+++ b/libavformat/http.c
@@ -19,6 +19,8 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <stdbool.h>
+
 #include "config.h"
 #include "config_components.h"
 
@@ -1747,6 +1749,7 @@ static int http_read_stream(URLContext *h, uint8_t *buf, int size)
     read_ret = http_buf_read(h, buf, size);
     while (read_ret < 0) {
         uint64_t target = h->is_streamed ? 0 : s->off;
+        bool is_premature = s->filesize > 0 && s->off < s->filesize;
 
         if (read_ret == AVERROR_EXIT)
             break;
@@ -1754,9 +1757,13 @@ static int http_read_stream(URLContext *h, uint8_t *buf, int size)
         if (h->is_streamed && !s->reconnect_streamed)
             break;
 
-        if (!(s->reconnect && s->filesize > 0 && s->off < s->filesize) &&
-            !(s->reconnect_at_eof && read_ret == AVERROR_EOF))
-            break;
+        if (!(s->reconnect && is_premature) &&
+            !(s->reconnect_at_eof && read_ret == AVERROR_EOF)) {
+            if (is_premature)
+                return AVERROR(EIO);
+            else
+                break;
+        }
 
         if (reconnect_delay > s->reconnect_delay_max || (s->reconnect_max_retries >= 0 && conn_attempts > s->reconnect_max_retries) ||
             reconnect_delay_total > s->reconnect_delay_total_max)