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GitHub - careerbuilder/rack-request-id-passthrough: Rack middleware which persists the X-Request-Id header to all outgoing http requests
GitHub - enoliglesias/rack-middleware-example: Dummy rails app in order to illustrate a simple integration of rack middleware
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ANN] rails-auth 1.0.0: a pluggable ACL-based AuthN/AuthZ library built on composable Rack Middleware : r/ruby
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