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HTTP/2: limited maximum number of requests in connection.

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The new directive "http2_max_requests" is introduced.  From users point of
view it works quite similar to "keepalive_requests" but has significantly
bigger default value that is more suitable for HTTP/2.
This commit is contained in:
Valentin Bartenev 2016-10-31 16:33:02 +03:00
parent 271d306056
commit df9b2b9011
3 changed files with 32 additions and 8 deletions
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16
src/http/v2/ngx_http_v2.c
View File

@ -326,9 +326,13 @@ ngx_http_v2_read_handler(ngx_event_t *rev)
if (c->close) {
c->close = 0;
if (!h2c->goaway) {
h2c->goaway = 1;
if (ngx_http_v2_send_goaway(h2c, NGX_HTTP_V2_NO_ERROR) == NGX_ERROR) {
if (ngx_http_v2_send_goaway(h2c, NGX_HTTP_V2_NO_ERROR)
== NGX_ERROR)
{
ngx_http_v2_finalize_connection(h2c, 0);
return;
}
@ -337,6 +341,7 @@ ngx_http_v2_read_handler(ngx_event_t *rev)
ngx_http_v2_finalize_connection(h2c, 0);
return;
}
}
h2c->blocked = 0;
@ -1177,6 +1182,15 @@ ngx_http_v2_state_headers(ngx_http_v2_connection_t *h2c, u_char *pos,
ngx_http_v2_set_dependency(h2c, node, depend, excl);
}
if (h2c->connection->requests >= h2scf->max_requests) {
h2c->goaway = 1;
if (ngx_http_v2_send_goaway(h2c, NGX_HTTP_V2_NO_ERROR) == NGX_ERROR) {
return ngx_http_v2_connection_error(h2c,
NGX_HTTP_V2_INTERNAL_ERROR);
}
}
return ngx_http_v2_state_header_block(h2c, pos, end);
rst_stream:

9
src/http/v2/ngx_http_v2_module.c
View File

@ -73,6 +73,13 @@ static ngx_command_t ngx_http_v2_commands[] = {
offsetof(ngx_http_v2_srv_conf_t, concurrent_streams),
NULL },
{ ngx_string("http2_max_requests"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_num_slot,
NGX_HTTP_SRV_CONF_OFFSET,
offsetof(ngx_http_v2_srv_conf_t, max_requests),
NULL },
{ ngx_string("http2_max_field_size"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_size_slot,
@ -322,6 +329,7 @@ ngx_http_v2_create_srv_conf(ngx_conf_t *cf)
h2scf->pool_size = NGX_CONF_UNSET_SIZE;
h2scf->concurrent_streams = NGX_CONF_UNSET_UINT;
h2scf->max_requests = NGX_CONF_UNSET_UINT;
h2scf->max_field_size = NGX_CONF_UNSET_SIZE;
h2scf->max_header_size = NGX_CONF_UNSET_SIZE;
@ -347,6 +355,7 @@ ngx_http_v2_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
ngx_conf_merge_uint_value(conf->concurrent_streams,
prev->concurrent_streams, 128);
ngx_conf_merge_uint_value(conf->max_requests, prev->max_requests, 1000);
ngx_conf_merge_size_value(conf->max_field_size, prev->max_field_size,
4096);

1
src/http/v2/ngx_http_v2_module.h
View File

@ -23,6 +23,7 @@ typedef struct {
typedef struct {
size_t pool_size;
ngx_uint_t concurrent_streams;
ngx_uint_t max_requests;
size_t max_field_size;
size_t max_header_size;
size_t preread_size;