refactor: change config name to capitalize_headers

lib/net/http.rb

@@ -507,10 +507,10 @@ class HTTPHeaderSyntaxError < StandardError; end
  # Returns the write timeout.
  # - {write_timeout=}[rdoc-ref:Net::HTTP#write_timeout=]:
  # Sets the write timeout.
- # - {:preserve_headers}[rdoc-ref:Net::HTTP#preserve_headers]:
- # Returns the open timeout.
- # - {:preserve_headers=}[rdoc-ref:Net::HTTP#preserve_headers=]:
- # Sets the read timeout.
+ # - {:capitalize_headers}[rdoc-ref:Net::HTTP#capitalize_headers]:
+ # Returns the capitalize_headers config.
+ # - {:capitalize_headers=}[rdoc-ref:Net::HTTP#capitalize_headers=]:
+ # Sets the capitalize_headers config.
  #
  # === Requests
  #
@@ -1127,7 +1127,7 @@ def initialize(address, port = nil) # :nodoc:
  @ssl_context = nil
  @ssl_session = nil
  @sspi_enabled = false
- @preserve_headers = false
+ @capitalize_headers = true
  SSL_IVNAMES.each do |ivname|
  instance_variable_set ivname, nil
  end
@@ -1537,8 +1537,8 @@ def use_ssl=(flag)
  # See {OpenSSL::SSL::SSLContext#verify_hostname=}[https://docs.ruby-lang.org/en/master/OpenSSL/SSL/SSLContext.html#attribute-i-verify_mode].
  attr_accessor :verify_hostname
 
- # Sets or returns whether to preserve the headers case
- attr_accessor :preserve_headers
+ # Sets or returns whether to capitalize the headers
+ attr_accessor :capitalize_headers
 
  # Returns the X509 certificate chain (an array of strings)
  # for the session's socket peer,
@@ -2308,7 +2308,7 @@ def request(req, body = nil, &block) # :yield: +response+
  return request(req, body, &block)
  }
  end
- req.preserve_headers = preserve_headers
+ req.capitalize_headers = capitalize_headers
  if proxy_user()
  req.proxy_basic_auth proxy_user(), proxy_pass() unless use_ssl?
  end

lib/net/http/generic_request.rb

@@ -55,7 +55,7 @@ def initialize(m, reqbody, resbody, uri_or_path, initheader = nil) # :nodoc:
  @body = nil
  @body_stream = nil
  @body_data = nil
- @preserve_headers = false
+ @capitalize_headers = true
  end
 
  # Returns the string method name for the request:
@@ -95,8 +95,8 @@ def initialize(m, reqbody, resbody, uri_or_path, initheader = nil) # :nodoc:
  #
  attr_reader :decode_content
 
- # Sets if will preserve case from headers
- attr_accessor :preserve_headers
+ # Sets if will capitalize headers
+ attr_accessor :capitalize_headers
 
  # Returns a string representation of the request:
  #
@@ -407,12 +407,12 @@ def write_header(sock, ver, path)
  end
  buf = +''
  buf << reqline << "\r\n"
- if preserve_headers
- each_header do |k,v|
+ if capitalize_headers
+ each_capitalized do |k,v|
  buf << "#{k}: #{v}\r\n"
  end
  else
- each_capitalized do |k,v|
+ each_header do |k,v|
  buf << "#{k}: #{v}\r\n"
  end
  end

test/net/http/test_http.rb

@@ -1368,7 +1368,7 @@ def test_partial_response
  assert_raise(EOFError) {http.get('/')}
  end
 
- def test_no_preserved_headers
+ def test_capitalized_headers
  headers = { accept: '*/*' }
  expected_raw_header = "Accept: */*\r\n"
  @server.mount_proc('/') do |req, _res|
@@ -1379,15 +1379,15 @@ def test_no_preserved_headers
  http.get('/', headers)
  end
 
- def test_preserved_headers
+ def test_no_capitalized_headers
  headers = { accept: '*/*' }
  expected_raw_header = "accept: */*\r\n"
  @server.mount_proc('/') do |req, _res|
  assert_includes(req.raw_header, expected_raw_header)
  end
 
  http = Net::HTTP.new(config('host'), config('port'))
- http.preserve_headers = true
+ http.capitalize_headers = false
  http.get('/', headers)
  end
 end