tree 69ca52b24a7e53f8a59fd80d0edfbec533a6b5a1
parent 2749fb681d15c9a969f26aa6716de4fdd97e8927
author Piotr Sikora <piotrsikora@google.com> 1504129931 -0700
committer Piotr Sikora <piotrsikora@google.com> 1504129931 -0700

HTTP/2: signal 0-byte HPACK's dynamic table size.

This change lets NGINX talk to clients with SETTINGS_HEADER_TABLE_SIZE
smaller than the default 4KB. Previously, NGINX would ACK the SETTINGS
frame with a small dynamic table size, but it would never send dynamic
table size update, leading to a connection-level COMPRESSION_ERROR.

Also, it allows clients to release 4KB of memory per connection, since
NGINX doesn't use HPACK's dynamic table when encoding headers, however
clients had to maintain it, since NGINX never signaled that it doesn't
use it.

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