Encode Spaces in Query Strings as '%20' Instead of '+' (#1125)

lib/faraday/utils.rb

@@ -16,12 +16,20 @@ module Faraday
       NestedParamsEncoder.encode(params)
     end
 
+    def default_space_encoding
+      @default_space_encoding ||= '+'
+    end
+
+    class << self
+      attr_writer :default_space_encoding
+    end
+
     ESCAPE_RE = /[^a-zA-Z0-9 .~_-]/.freeze
 
     def escape(str)
       str.to_s.gsub(ESCAPE_RE) do |match|
         '%' + match.unpack('H2' * match.bytesize).join('%').upcase
-      end.tr(' ', '+')
+      end.gsub(' ', default_space_encoding)
     end
 
     def unescape(str)

spec/faraday/request/url_encoded_spec.rb

@@ -67,4 +67,17 @@ RSpec.describe Faraday::Request::UrlEncoded do
     response = conn.post('/echo', 'a' => { 'b' => { 'c' => ['d'] } })
     expect(response.body).to eq('a%5Bb%5D%5Bc%5D%5B%5D=d')
   end
+
+  context 'customising default_space_encoding' do
+    around do |example|
+      Faraday::Utils.default_space_encoding = '%20'
+      example.run
+      Faraday::Utils.default_space_encoding = nil
+    end
+
+    it 'uses the custom character to encode spaces' do
+      response = conn.post('/echo', str: 'apple banana')
+      expect(response.body).to eq('str=apple%20banana')
+    end
+  end
 end