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Versions: 34
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Contents
module Startback
class Context
#
# Rack middleware that installs a particular context instance
# on the Rack environment.
#
# Examples:
#
# # Use the default context class
# Rack::Builder.new do
# use Startback::Context::Middleware
#
# run ->(env){
# ctx = env[Startback::Context::Middleware::RACK_ENV_KEY]
# ctx.is_a?(Startback::Context) # => true
# }
# end
#
# # Use a user defined context class
# Rack::Builder.new do
# use Startback::Context::Middleware, MyContextClass.new
#
# run ->(env){
# ctx = env[Startback::Context::Middleware::RACK_ENV_KEY]
# ctx.is_a?(MyContextClass) # => true (your subclass)
# ctx.is_a?(Startback::Context) # => true (required!)
# }
# end
#
class Middleware
RACK_ENV_KEY = 'SAMBACK_CONTEXT'
def initialize(app, context = Context.new)
@app = app
@context = context
end
attr_reader :context
def call(env)
env[RACK_ENV_KEY] ||= context.dup.tap{|c|
c.original_rack_env = env.dup
}
@app.call(env)
end
def self.context(env)
env[RACK_ENV_KEY]
end
end # class Middleware
end # class Context
end # module Startback
Version data entries
34 entries across 34 versions & 3 rubygems