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require "abstract_unit"
class QueryStringParsingTest < ActionDispatch::IntegrationTest
class TestController < ActionController::Base
class << self
attr_accessor :last_query_parameters
end
def parse
self.class.last_query_parameters = request.query_parameters
head :ok
end
end
class EarlyParse
def initialize(app)
@app = app
end
def call(env)
# Trigger a Rack parse so that env caches the query params
Rack::Request.new(env).params
@app.call(env)
end
end
def teardown
TestController.last_query_parameters = nil
end
test "query string" do
assert_parses(
{ "action" => "create_customer", "full_name" => "David Heinemeier Hansson", "customerId" => "1" },
"action=create_customer&full_name=David%20Heinemeier%20Hansson&customerId=1"
)
end
test "deep query string" do
assert_parses(
{ "x" => { "y" => { "z" => "10" } } },
"x[y][z]=10"
)
end
test "deep query string with array" do
assert_parses({ "x" => { "y" => { "z" => ["10"] } } }, "x[y][z][]=10")
assert_parses({ "x" => { "y" => { "z" => ["10", "5"] } } }, "x[y][z][]=10&x[y][z][]=5")
end
test "deep query string with array of hash" do
assert_parses({ "x" => { "y" => [{ "z" => "10" }] } }, "x[y][][z]=10")
assert_parses({ "x" => { "y" => [{ "z" => "10", "w" => "10" }] } }, "x[y][][z]=10&x[y][][w]=10")
assert_parses({ "x" => { "y" => [{ "z" => "10", "v" => { "w" => "10" } }] } }, "x[y][][z]=10&x[y][][v][w]=10")
end
test "deep query string with array of hashes with one pair" do
assert_parses({ "x" => { "y" => [{ "z" => "10" }, { "z" => "20" }] } }, "x[y][][z]=10&x[y][][z]=20")
end
test "deep query string with array of hashes with multiple pairs" do
assert_parses(
{ "x" => { "y" => [{ "z" => "10", "w" => "a" }, { "z" => "20", "w" => "b" }] } },
"x[y][][z]=10&x[y][][w]=a&x[y][][z]=20&x[y][][w]=b"
)
end
test "query string with nil" do
assert_parses(
{ "action" => "create_customer", "full_name" => "" },
"action=create_customer&full_name="
)
end
test "query string with array" do
assert_parses(
{ "action" => "create_customer", "selected" => ["1", "2", "3"] },
"action=create_customer&selected[]=1&selected[]=2&selected[]=3"
)
end
test "query string with amps" do
assert_parses(
{ "action" => "create_customer", "name" => "Don't & Does" },
"action=create_customer&name=Don%27t+%26+Does"
)
end
test "query string with many equal" do
assert_parses(
{ "action" => "create_customer", "full_name" => "abc=def=ghi" },
"action=create_customer&full_name=abc=def=ghi"
)
end
test "query string without equal" do
assert_parses({ "action" => nil }, "action")
assert_parses({ "action" => { "foo" => nil } }, "action[foo]")
assert_parses({ "action" => { "foo" => { "bar" => nil } } }, "action[foo][bar]")
assert_parses({ "action" => { "foo" => { "bar" => [] } } }, "action[foo][bar][]")
assert_parses({ "action" => { "foo" => [] } }, "action[foo][]")
assert_parses({ "action" => { "foo" => [{ "bar" => nil }] } }, "action[foo][][bar]")
end
def test_array_parses_without_nil
assert_parses({ "action" => ["1"] }, "action[]=1&action[]")
end
test "perform_deep_munge" do
old_perform_deep_munge = ActionDispatch::Request::Utils.perform_deep_munge
ActionDispatch::Request::Utils.perform_deep_munge = false
begin
assert_parses({ "action" => nil }, "action")
assert_parses({ "action" => { "foo" => nil } }, "action[foo]")
assert_parses({ "action" => { "foo" => { "bar" => nil } } }, "action[foo][bar]")
assert_parses({ "action" => { "foo" => { "bar" => [nil] } } }, "action[foo][bar][]")
assert_parses({ "action" => { "foo" => [nil] } }, "action[foo][]")
assert_parses({ "action" => { "foo" => [{ "bar" => nil }] } }, "action[foo][][bar]")
assert_parses({ "action" => ["1", nil] }, "action[]=1&action[]")
ensure
ActionDispatch::Request::Utils.perform_deep_munge = old_perform_deep_munge
end
end
test "query string with empty key" do
assert_parses(
{ "action" => "create_customer", "full_name" => "David Heinemeier Hansson" },
"action=create_customer&full_name=David%20Heinemeier%20Hansson&=Save"
)
end
test "query string with many ampersands" do
assert_parses(
{ "action" => "create_customer", "full_name" => "David Heinemeier Hansson" },
"&action=create_customer&&&full_name=David%20Heinemeier%20Hansson"
)
end
test "unbalanced query string with array" do
assert_parses(
{ "location" => ["1", "2"], "age_group" => ["2"] },
"location[]=1&location[]=2&age_group[]=2"
)
end
test "ambiguous query string returns a bad request" do
with_routing do |set|
set.draw do
ActiveSupport::Deprecation.silence do
get ":action", to: ::QueryStringParsingTest::TestController
end
end
get "/parse", headers: { "QUERY_STRING" => "foo[]=bar&foo[4]=bar" }
assert_response :bad_request
end
end
private
def assert_parses(expected, actual)
with_routing do |set|
set.draw do
ActiveSupport::Deprecation.silence do
get ":action", to: ::QueryStringParsingTest::TestController
end
end
@app = self.class.build_app(set) do |middleware|
middleware.use(EarlyParse)
end
get "/parse", params: actual
assert_response :ok
assert_equal(expected, ::QueryStringParsingTest::TestController.last_query_parameters)
end
end
end
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