Event ID not recognized by Chrome when it follows after two new lines

[rda-dev]

I need to specify unique ID to each of my event. For this purpose on server I use method set_event_id after add_message method call.

On server I use:

sse.add_message('myevent', 'hello')
sse.set_event_id('123')
yield

In browser I get

event: myevent
data: hello

id: 123

and after reconnect by EventSource object, browser doesn't set HTTP_LAST_EVENT_ID header.

I tried to manual modify server response and set it to

event: myevent
data: hello
id: 123

With this response browser normally set HTTP_LAST_EVENT_ID to '123' after next reconnect.

What I'm doing wrong? How can I force the browser to set header to 123 with Sse methods?

I used Chrome 33.0.1750