Test against Ruby 3.0

.travis.yml

@@ -9,6 +9,7 @@ rvm:
   - ruby-2.5
   - ruby-2.6
   - ruby-2.7
+  - ruby-3.0
   - ruby-head
 script:
   - bundle exec bundler-audit

README.md

@@ -19,7 +19,7 @@ This gem provides a safe and easy way to fetch content from user-submitted urls.
 - handles URIs/IPv4/IPv6, redirects, DNS, etc, correctly
 - has 0 runtime dependencies
 - has a comprehensive test suite (100% code coverage)
-- is tested against ruby `2.0`, `2.1`, `2.2`, `2.3`, `2.4`, `2.5`, `2.6`, `2.7`, and `ruby-head`
+- is tested against ruby `2.0`, `2.1`, `2.2`, `2.3`, `2.4`, `2.5`, `2.6`, `2.7`, `3.0`, and `ruby-head`
 
 ### Quick start
 

spec/lib/ssrf_filter_spec.rb

@@ -172,7 +172,7 @@
     it 'should disallow header values with newlines and carriage returns' do
       # Starting in ruby 2.5, assigning a header value with newlines throws an ArgumentError
       major, minor = RUBY_VERSION.scan(/\A(\d+)\.(\d+)\.\d+\Z/).first.map(&:to_i)
-      exception = major >= 2 && minor >= 5 ? ArgumentError : SsrfFilter::CRLFInjection
+      exception = major >= 3 || (major >= 2 && minor >= 5) ? ArgumentError : SsrfFilter::CRLFInjection
 
       expect do
         SsrfFilter.get("https://#{public_ipv4}", headers: {'name' => "val\nue"})
@@ -417,9 +417,10 @@ def inject_custom_trust_store(*certificates)
     end
 
     it 'should follow redirects and succeed on a public hostname' do
+      major = RUBY_VERSION.scan(/\A(\d+)\.\d+\.\d+\Z/).first.map(&:to_i).first
       stub_request(:post, "https://#{public_ipv4}/path?key=value").with(headers: {host: 'www.example.com'})
         .to_return(status: 301, headers: {location: 'https://www.example2.com/path2?key2=value2'})
-      stub_request(:post, "https://#{public_ipv6}/path2?key2=value2")
+      stub_request(:post, "https://#{major >= 3 ? "[#{public_ipv6}]" : public_ipv6}/path2?key2=value2")
         .with(headers: {host: 'www.example2.com'}).to_return(status: 200, body: 'response body')
       resolver = proc do |hostname|
         [{

ssrf_filter.gemspec

@@ -20,9 +20,8 @@ Gem::Specification.new do |gem|
   gem.add_development_dependency('bundler-audit', '~> 0.6.1')
   gem.add_development_dependency('coveralls', '~> 0.8.22')
   gem.add_development_dependency('rspec', '~> 3.8.0')
-  gem.add_development_dependency('webmock', '~> 3.5.1')
-
-  raise 'Unsupported version of ruby' unless major == 2
+  gem.add_development_dependency('webmock', '>= 3.5.1')
+  gem.add_development_dependency('webrick') if major >= 3
 
   if minor > 1
     gem.add_development_dependency('rubocop', '~> 0.65.0')