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Example of early head flush on load time
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset=utf-8 /> | |
| <title>Hello</title> | |
| <link rel="stylesheet" href="styles.css"> | |
| </head> | |
| <body> | |
| Hello World | |
| </body> | |
| </html> | |
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| require 'goliath' | |
| class Delay < Goliath::API | |
| def response(env) | |
| case env['REQUEST_PATH'] | |
| when /css$/ then | |
| # simulate slow (1s delay) stylesheet | |
| EM::Synchrony.sleep(1) | |
| return [200, {'Content-Type' => 'text/css'}, 'body { color: red }'] | |
| else | |
| data = File.open('file.html') | |
| # flush the HTML head (140 bytes) immediately after the headers | |
| # this will allow the preloader to request the stylesheet before | |
| # the rest of the page completes | |
| EM.add_timer(0.01) do | |
| env.chunked_stream_send(data.read(140)) | |
| end | |
| # flush remainder of document after 1.5s | |
| EM.add_timer(1.5) do | |
| env.chunked_stream_send(data.read.to_s) | |
| env.chunked_stream_close | |
| end | |
| # flush 200 response immediately | |
| chunked_streaming_response(200, {'Content-Type' => 'text/html'}) | |
| end | |
| end | |
| end |
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