[PATCH] HTTP/2: add debug logging of pseudo-headers and control frames

[Piotr Sikora]

# HG changeset patch
# User Piotr Sikora <piotrsikora at google.com>
# Date 1490516711 25200
#      Sun Mar 26 01:25:11 2017 -0700
# Node ID 6990fb6463ce47705e06ff6d0fbd9ae6696aeb37
# Parent  22be63bf21edaa1b8ea916c7d8cd4e5fe4892061
HTTP/2: add debug logging of pseudo-headers and control frames.

Signed-off-by: Piotr Sikora <piotrsikora at google.com>

diff -r 22be63bf21ed -r 6990fb6463ce src/http/v2/ngx_http_v2.c
--- a/src/http/v2/ngx_http_v2.c
+++ b/src/http/v2/ngx_http_v2.c
@@ -1585,6 +1585,10 @@ ngx_http_v2_state_process_header(ngx_htt
         rc = ngx_http_v2_pseudo_header(r, header);
 
         if (rc == NGX_OK) {
+            ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                           "http2 http header: \":%V: %V\"",
+                           &header->name, &header->value);
+
             return ngx_http_v2_state_header_complete(h2c, pos, end);
         }
 
@@ -1955,6 +1959,9 @@ ngx_http_v2_state_settings(ngx_http_v2_c
             return ngx_http_v2_connection_error(h2c, NGX_HTTP_V2_SIZE_ERROR);
         }
 
+        ngx_log_debug0(NGX_LOG_DEBUG_HTTP, h2c->connection->log, 0,
+                       "http2 SETTINGS frame ack:1");
+
         h2c->settings_ack = 1;
 
         return ngx_http_v2_state_complete(h2c, pos, end);
@@ -1968,6 +1975,9 @@ ngx_http_v2_state_settings(ngx_http_v2_c
         return ngx_http_v2_connection_error(h2c, NGX_HTTP_V2_SIZE_ERROR);
     }
 
+    ngx_log_debug0(NGX_LOG_DEBUG_HTTP, h2c->connection->log, 0,
+                   "http2 SETTINGS frame ack:0");
+
     ngx_http_v2_send_settings(h2c, 1);
 
     return ngx_http_v2_state_settings_params(h2c, pos, end);
@@ -2070,12 +2080,16 @@ ngx_http_v2_state_ping(ngx_http_v2_conne
     }
 
     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, h2c->connection->log, 0,
-                   "http2 PING frame, flags: %ud", h2c->state.flags);
+                   "http2 PING frame ack:%ud",
+                   h2c->state.flags & NGX_HTTP_V2_ACK_FLAG ? 1 : 0);
 
     if (h2c->state.flags & NGX_HTTP_V2_ACK_FLAG) {
         return ngx_http_v2_state_skip(h2c, pos, end);
     }
 
+    ngx_log_debug0(NGX_LOG_DEBUG_HTTP, h2c->connection->log, 0,
+                   "http2 send PING frame ack:1");
+
     frame = ngx_http_v2_get_frame(h2c, NGX_HTTP_V2_PING_SIZE,
                                   NGX_HTTP_V2_PING_FRAME,
                                   NGX_HTTP_V2_ACK_FLAG, 0);