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HTTP/2: workaround for clients which fail on table size updates.

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There are clients which cannot handle HPACK's dynamic table size updates
as added in 12cadc4669a7 (1.13.6).  Notably, old versions of OkHttp library
are known to fail on it (ticket #1397).

This change makes it possible to work with such clients by only sending
dynamic table size updates in response to SETTINGS_HEADER_TABLE_SIZE.  As
a downside, clients which do not use SETTINGS_HEADER_TABLE_SIZE will
continue to maintain default 4k table.
This commit is contained in:
Maxim Dounin 2018-08-09 20:12:17 +03:00
parent dd8e1e178c
commit 0d224602e9
1 changed files with 5 additions and 2 deletions
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7
src/http/v2/ngx_http_v2.c
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@ -270,8 +270,6 @@ ngx_http_v2_init(ngx_event_t *rev)
h2c->frame_size = NGX_HTTP_V2_DEFAULT_FRAME_SIZE;
h2c->table_update = 1;
h2scf = ngx_http_get_module_srv_conf(hc->conf_ctx, ngx_http_v2_module);
h2c->concurrent_pushes = h2scf->concurrent_pushes;
@ -2075,6 +2073,11 @@ ngx_http_v2_state_settings_params(ngx_http_v2_connection_t *h2c, u_char *pos,
h2c->concurrent_pushes = ngx_min(value, h2scf->concurrent_pushes);
break;
case NGX_HTTP_V2_HEADER_TABLE_SIZE_SETTING:
h2c->table_update = 1;
break;
default:
break;
}