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module Rack
class MethodOverride
HTTP_METHODS = %w(GET HEAD PUT POST DELETE OPTIONS PATCH)
METHOD_OVERRIDE_PARAM_KEY = "_method".freeze
HTTP_METHOD_OVERRIDE_HEADER = "HTTP_X_HTTP_METHOD_OVERRIDE".freeze
def initialize(app)
@app = app
end
def call(env)
if env["REQUEST_METHOD"] == "POST"
method = method_override(env)
if HTTP_METHODS.include?(method)
env["rack.methodoverride.original_method"] = env["REQUEST_METHOD"]
env["REQUEST_METHOD"] = method
end
end
@app.call(env)
end
def method_override(env)
req = Request.new(env)
method = req.POST[METHOD_OVERRIDE_PARAM_KEY] ||
env[HTTP_METHOD_OVERRIDE_HEADER]
method.to_s.upcase
end
end
end
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