class Grape::Middleware::Stack
Class to handle the stack of middlewares based on ActionDispatch::MiddlewareStack It allows to insert and insert after
Attributes
middlewares[RW]
others[RW]
Public Class Methods
new()
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# File lib/grape/middleware/stack.rb, line 43 def initialize @middlewares = [] @others = [] end
Public Instance Methods
[](index)
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# File lib/grape/middleware/stack.rb, line 60 def [](index) middlewares[index] end
build(builder = Rack::Builder.new)
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@return [Rack::Builder] the builder object with our middlewares applied
# File lib/grape/middleware/stack.rb, line 96 def build(builder = Rack::Builder.new) others.shift(others.size).each { |m| merge_with(m) } middlewares.each do |m| m.use_in(builder) end builder end
concat(other_specs)
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@description Add middlewares with :use operation to the stack. Store others with :insert_* operation for later @param [Array] other_specs An array of middleware specifications (e.g. [[:use, klass], [:insert_before, *args]])
# File lib/grape/middleware/stack.rb, line 106 def concat(other_specs) @others << Array(other_specs).reject { |o| o.first == :use } merge_with(Array(other_specs).select { |o| o.first == :use }) end
each(&block)
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# File lib/grape/middleware/stack.rb, line 48 def each(&block) @middlewares.each(&block) end
insert(index, *args, &block)
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# File lib/grape/middleware/stack.rb, line 64 def insert(index, *args, &block) index = assert_index(index, :before) middleware = self.class::Middleware.new(*args, &block) middlewares.insert(index, middleware) end
Also aliased as: insert_before
insert_after(index, *args, &block)
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# File lib/grape/middleware/stack.rb, line 73 def insert_after(index, *args, &block) index = assert_index(index, :after) insert(index + 1, *args, &block) end
last()
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# File lib/grape/middleware/stack.rb, line 56 def last middlewares.last end
merge_with(middleware_specs)
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# File lib/grape/middleware/stack.rb, line 84 def merge_with(middleware_specs) middleware_specs.each do |operation, *args| if args.last.is_a?(Proc) last_proc = args.pop public_send(operation, *args, &last_proc) else public_send(operation, *args) end end end
size()
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# File lib/grape/middleware/stack.rb, line 52 def size middlewares.size end
use(...)
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# File lib/grape/middleware/stack.rb, line 79 def use(...) middleware = self.class::Middleware.new(...) middlewares.push(middleware) end
Protected Instance Methods
assert_index(index, where)
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# File lib/grape/middleware/stack.rb, line 113 def assert_index(index, where) i = index.is_a?(Integer) ? index : middlewares.index(index) i || raise("No such middleware to insert #{where}: #{index.inspect}") end