47 lines
1.2 KiB
Ruby
47 lines
1.2 KiB
Ruby
module Rack
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class LiveReload
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LIVERELOAD_JS_PATH = '/__rack/livereload.js'
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attr_reader :app
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def initialize(app)
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@app = app
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end
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def call(env)
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if env['PATH_INFO'] == LIVERELOAD_JS_PATH
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deliver_file(::File.expand_path('../../../js/livereload.js', __FILE__))
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else
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status, headers, body = @app.call(env)
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case headers['Content-Type']
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when %r{text/html}
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new_body = []
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body.each do |line|
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if line['</head>']
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src = LIVERELOAD_JS_PATH.dup
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src << "?host=#{env['HTTP_HOST'].gsub(%r{:.*}, '')}" if env['HTTP_HOST']
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line.gsub!('</head>', %{<script type="text/javascript" src="#{src}"></script></head>})
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end
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new_body << line
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headers["X-Rack-LiveReload"] = '1'
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end
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body = new_body
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headers['Content-Length'] = body.join.length.to_s
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end
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[ status, headers, body ]
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end
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end
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private
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def deliver_file(file)
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[ 200, { 'Content-Type' => 'text/javascript', 'Content-Length' => ::File.size(file).to_s }, [ ::File.read(file) ] ]
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end
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end
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end
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