feature: add ssl.set_http_version API

lib/ngx/ssl.lua

@@ -58,6 +58,8 @@ int ngx_http_lua_ffi_set_priv_key(void *r, void *cdata, char **err);
 void ngx_http_lua_ffi_free_cert(void *cdata);
 
 void ngx_http_lua_ffi_free_priv_key(void *cdata);
+
+int ngx_http_lua_ffi_set_httpv(ngx_http_request_t *r, int hv, char **err);
 ]]
 
 
@@ -284,4 +286,23 @@ do
 end
 
 
+function _M.set_http_version(hv)
+    local r = getfenv(0).__ngx_req
+    if not r then
+        return error("no request found")
+    end
+
+    local v = tonumber(hv)
+    if v < 0 then
+        return error("no negative number")
+    end
+
+    local rc = C.ngx_http_lua_ffi_set_httpv(r, v, errmsg)
+    if rc == FFI_OK then
+        return true
+    end
+
+    return nil, ffi_str(errmsg[0])
+end
+
 return _M

lib/ngx/ssl.md

@@ -23,6 +23,7 @@ Table of Contents
     * [parse_pem_priv_key](#parse_pem_priv_key)
     * [set_cert](#set_cert)
     * [set_priv_key](#set_priv_key)
+    * [set_http_version](#set_http_version)
 * [Community](#community)
     * [English Mailing List](#english-mailing-list)
     * [Chinese Mailing List](#chinese-mailing-list)
@@ -45,8 +46,8 @@ Synopsis
 lua_package_path "/path/to/lua-resty-core/lib/?.lua;;";
 
 server {
-    listen 443 ssl;
-    server_name   test.com;
+    listen 443 ssl http2;
+    server_name   test.com hello.com;
 
     # useless placeholders: just to shut up NGINX configuration
     # loader errors:
@@ -91,6 +92,15 @@ server {
             ngx.log(ngx.ERR, "failed to set DER private key: ", err)
             return ngx.exit(ngx.ERROR)
         end
+
+        local sn, err = ssl.server_name()
+        if not sn then
+            ngx.log(ngx.ERR, "failed to get server name: ", err)
+            return ngx.exit(ngx.ERROR)
+        end
+        if sn == "test.com" then
+            ssl.set_http_version(1)
+        end
     }
 
     location / {
@@ -381,6 +391,23 @@ This function was first added in version `0.1.7`.
 
 [Back to TOC](#table-of-contents)
 
+set_http_version
+------------
+**syntax:** *ok, err = ssl.set_http_version(http_version)*
+
+**context:** *ssl_certificate_by_lua**
+
+Sets the ALPN(NPN) http version.
+
+http_version:
+
+* 1 - http1.1
+* 2 - http2
+
+Returns `true` on success, or a `nil` value and a string describing the error otherwise.
+
+[Back to TOC](#table-of-contents)
+
 Community
 =========
 

t/http2.t

@@ -0,0 +1,80 @@
+# vim:set ft= ts=4 sw=4 et fdm=marker:
+
+use Test::Nginx::Socket::Lua;
+use Cwd qw(cwd);
+
+log_level('debug');
+# server_port('443');
+server_name('test.com');
+
+repeat_each(2);
+
+plan tests => repeat_each() * blocks();
+
+our $CWD = cwd();
+
+#no_diff();
+#no_long_string();
+no_shuffle();
+
+$ENV{TEST_NGINX_USE_HTTP2} = 1;
+$ENV{TEST_NGINX_LUA_PACKAGE_PATH} = "$::CWD/lib/?.lua;;";
+
+run_tests();
+
+
+__DATA__
+
+
+=== TEST 1: test set http2
+--- http_config
+    lua_package_path "$TEST_NGINX_LUA_PACKAGE_PATH/?.lua;;";
+
+
+--- config
+    ssl_certificate      ../../cert/test.crt;
+    ssl_certificate_key  ../../cert/test.key;
+
+    ssl_certificate_by_lua_block {
+        local ssl = require "ngx.ssl";
+        ssl.set_http_version(2);
+    }
+    location /t {
+        return 200 "ok";
+    }
+
+--- http2
+--- sni
+--- request
+GET /t
+--- ignore_response
+--- error_log
+LUA SSL ALPN selected: h2
+
+
+
+=== TEST 2: test set http1.1
+--- http_config
+    lua_package_path "$TEST_NGINX_LUA_PACKAGE_PATH/?.lua;;";
+
+
+--- config
+    ssl_certificate      ../../cert/test.crt;
+    ssl_certificate_key  ../../cert/test.key;
+
+    ssl_certificate_by_lua_block {
+        local ssl = require "ngx.ssl";
+        ssl.set_http_version(1);
+    }
+    location /t {
+        return 200 "ok";
+    }
+
+--- http2
+--- sni
+--- request
+GET /t
+--- ignore_response
+--- error_log
+LUA SSL ALPN selected: http/1.1
+