The ngx_http_spdy_module module provides experimental support for SPDY. Currently, draft 2 of SPDY protocol is implemented.

This module is not built by default, it should be enabled with the --with-http_spdy_module configuration parameter.

The module is experimental, caveat emptor applies.

Current implementation of SPDY protocol does not support “server push”.

Responses in SPDY connections cannot be rate limited.

server {
    listen 443 ssl spdy;

    ssl_certificate server.crt;
    ssl_certificate_key server.key;
    ...
}

Note that in order to accept both HTTPS and SPDY connections simultaneously on the same port, OpenSSL library used should support “Next Protocol Negotiation” TLS extension, available since OpenSSL version 1.0.1.

spdy_headers_comp 0;

Sets a header compression level of a response in a range from 1 (fastest, less compression) to 9 (slowest, best compression). The special value 0 turns off header compression.

The ngx_http_spdy_module module supports the following embedded variables:

$spdy

SPDY protocol version for SPDY connections, or an empty string otherwise;

$spdy_request_priority

request priority for SPDY connections, or an empty string otherwise.