Add request_object:peer() for NGINX adapter

host and port are extracted via
box.session.peer().

family, type and protocol are hardcoded.

README.md

@@ -208,8 +208,10 @@ end
 * `req.headers` - normalized request headers. A normalized header
   is in the lower case, all headers joined together into a single string.
 * `req.peer` - a Lua table with information about the remote peer
-  (like `socket:peer()`). **NOTE**: not available when using NGINX TSGI
-  adapter.
+  (like `socket:peer()`).
+  **NOTE**: when router is being used with
+  nginx adapter, `req.peer` contains information on iproto connection with
+  nginx, not the original HTTP user-agent.
 * `tostring(req)` - returns a string representation of the request.
 * `req:request_line()` - returns the request body.
 * `req:read(delimiter|chunk|{delimiter = x, chunk = x}, timeout)` - reads the

http/nginx_server/init.lua

@@ -43,6 +43,10 @@ local function make_env(server, req)
         body = json.decode(req.body).params
     end
 
+    local hostport = box.session.peer(box.session.id())  -- luacheck: ignore
+    local hostport_parts = string.split(hostport, ':')   -- luacheck: ignore
+    local peer_host, peer_port = hostport_parts[1], tonumber(hostport_parts[2])
+
     local env = {
         ['tsgi.version'] = '1',
         ['tsgi.url_scheme'] = 'http',     -- no support for https
@@ -62,6 +66,13 @@ local function make_env(server, req)
         ['PATH_INFO'] = path_info,
         ['QUERY_STRING'] = query_string,
         ['SERVER_PROTOCOL'] = req.proto,
+        [tsgi.KEY_PEER] = {
+            host = peer_host,
+            port = peer_port,
+            family = 'AF_INET',
+            type = 'SOCK_STREAM',
+            protocol = 'tcp',
+        },
 
         [KEY_BODY] = body,            -- http body string; used in `tsgi_input_read`
     }

http/router/init.lua

@@ -26,7 +26,7 @@ local function request_from_env(env, router)  -- luacheck: ignore
     local request = {
         router = router,
         env = env,
-        peer = env[tsgi.KEY_PEER],       -- only for builtin server
+        peer = env[tsgi.KEY_PEER],
         method = env['REQUEST_METHOD'],
         path = env['PATH_INFO'],
         query = env['QUERY_STRING'],

test/http.test.lua

@@ -318,18 +318,12 @@ test:test("server requests", function(test)
     test:is(r.status, 500, 'die 500')
     --test:is(r.reason, 'Internal server error', 'die reason')
 
-    -- request.peer is not supported in NGINX TSGI
-    if is_builtin_test() then
-        router:route({ path = '/info' }, function(cx)
-                return cx:render({ json = cx.peer })
-        end)
-        local r = json.decode(http_client.get('http://127.0.0.1:12345/info').body)
-        test:is(r.host, '127.0.0.1', 'peer.host')
-        test:isnumber(r.port, 'peer.port')
-    else
-        test:ok(true, 'peer.host - ignore on NGINX')
-        test:ok(true, 'peer.port - ignore on NGINX')
-    end
+    router:route({ path = '/info' }, function(cx)
+            return cx:render({ json = cx.peer })
+    end)
+    local r = json.decode(http_client.get('http://127.0.0.1:12345/info').body)
+    test:is(r.host, '127.0.0.1', 'peer.host')
+    test:isnumber(r.port, 'peer.port')
 
     local r = router:route({method = 'POST', path = '/dit', file = 'helper.html.el'},
         function(tx)