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Merge pull request #85 from jmoriau/fix-filter-middleware

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Fix filter middleware
This commit is contained in:
Serdar Dogruyol 2016-02-12 13:09:59 +02:00
commit 52538afb10
1 changed files with 28 additions and 3 deletions
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31
src/kemal/middleware/filters.cr
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@ -17,6 +17,11 @@ module Kemal::Middleware
process_filter(context, :after)
end
def filter_for_path_type_defined?(path, type)
lookup = @tree.find radix_path(type, path)
lookup.found? && lookup.payload.is_a? Block
end
private def process_filter(context, type)
lookup = @tree.find radix_path(type, context.request.path)
if lookup.found? && lookup.payload.is_a? Block
@ -28,6 +33,19 @@ module Kemal::Middleware
private def radix_path(type : Symbol, path)
"/#{type}#{path}"
end
class BeforeFilterAlreadyDefinedException < Exception
def initialize(path)
super "A before-filter is already defined for path: '#{path}'."
end
end
class AfterFilterAlreadyDefinedException < Exception
def initialize(path)
super "An after-filter is already defined for path: '#{path}'."
end
end
end
class Block
@ -35,18 +53,25 @@ module Kemal::Middleware
def initialize(&@block : HTTP::Server::Context -> _)
end
end
end
def add_filters
Kemal.config.add_handler Kemal::Middleware::Filter.new
unless filter = Kemal.config.handlers.any? { |handler| handler.is_a? Kemal::Middleware::Filter }
filter = Kemal::Middleware::Filter.new
Kemal.config.add_handler filter
end
filter
end
def before(path = "*", options = {} of Symbol => String, &block : HTTP::Server::Context -> _)
filter = Kemal.config.handlers.first as Kemal::Middleware::Filter
filter = (Kemal.config.handlers.find { |handler| handler.is_a? Kemal::Middleware::Filter } || add_filters) as Kemal::Middleware::Filter
raise Kemal::Middleware::Filter::BeforeFilterAlreadyDefinedException.new(path) if filter.filter_for_path_type_defined?(path, :before)
filter.add :before, path, options, &block
end
def after(path = "*", options = {} of Symbol => String, &block : HTTP::Server::Context -> _)
filter = Kemal.config.handlers.first as Kemal::Middleware::Filter
filter = (Kemal.config.handlers.find { |handler| handler.is_a? Kemal::Middleware::Filter } || add_filters) as Kemal::Middleware::Filter
raise Kemal::Middleware::Filter::AfterFilterAlreadyDefinedException.new(path) if filter.filter_for_path_type_defined?(path, :after)
filter.add :after, path, options, &block
end