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# frozen_string_literal: true
module Excon
module Utils
module_function
CONTROL = "#{(0x0..0x1f).map(&:chr).join}\u007F"
DELIMS = '<>#%"'
UNWISE = '{}|\\^[]`'
NONASCII = (0x80..0xff).map(&:chr).join
UNESCAPED = /([#{Regexp.escape("#{CONTROL} #{DELIMS}#{UNWISE}#{NONASCII}")}])/.freeze
ESCAPED = /%([0-9a-fA-F]{2})/.freeze
def binary_encode(string)
if FORCE_ENC && string.encoding != Encoding::ASCII_8BIT
if string.frozen?
string.dup.force_encoding('BINARY')
else
string.force_encoding('BINARY')
end
else
string
end
end
def connection_uri(datum = @data)
raise ArgumentError, '`datum` must be given unless called on a Connection' unless datum
if datum[:scheme] == UNIX
"#{datum[:scheme]}://#{datum[:socket]}"
else
"#{datum[:scheme]}://#{datum[:host]}#{port_string(datum)}"
end
end
# Redact sensitive info from provided data
def redact(datum)
datum = datum.dup
if datum.key?(:headers)
if datum[:headers].key?('Authorization') || datum[:headers].key?('Proxy-Authorization')
datum[:headers] = datum[:headers].dup
end
datum[:headers]['Authorization'] = REDACTED if datum[:headers].key?('Authorization')
datum[:headers]['Proxy-Authorization'] = REDACTED if datum[:headers].key?('Proxy-Authorization')
end
datum[:password] = REDACTED if datum.key?(:password)
if datum.key?(:proxy) && datum[:proxy]&.key?(:password)
datum[:proxy] = datum[:proxy].dup
datum[:proxy][:password] = REDACTED
end
datum
end
def request_uri(datum)
connection_uri(datum) + datum[:path] + query_string(datum)
end
def port_string(datum)
if !default_port?(datum) || datum[:include_default_port] || !datum[:omit_default_port]
":#{datum[:port]}"
else
''
end
end
def default_port?(datum)
(!datum[:scheme]&.casecmp?('unix') && datum[:port].nil?) ||
(datum[:scheme]&.casecmp?('http') && datum[:port] == 80) ||
(datum[:scheme]&.casecmp?('https') && datum[:port] == 443)
end
def query_string(datum)
str = +''
case datum[:query]
when String
str << '?' << datum[:query]
when Hash
str << '?'
datum[:query].sort_by { |k, _| k.to_s }.each do |key, values|
key = CGI.escape(key.to_s)
if values.nil?
str << key << '&'
else
[values].flatten.each do |value|
str << key << '=' << CGI.escape(value.to_s) << '&'
end
end
end
str.chop! # remove trailing '&'
end
str
end
# Splits a header value +str+ according to HTTP specification.
def split_header_value(str)
return [] if str.nil?
str = str.dup.strip
str = binary_encode(str)
str.scan(/\G((?:"(?:\\.|[^"])+?"|[^",])+)
(?:,\s*|\Z)/xn).flatten
end
# Escapes HTTP reserved and unwise characters in +str+
def escape_uri(str)
str = str.dup
str = binary_encode(str)
str.gsub(UNESCAPED) { format('%%%02X', ::Regexp.last_match(1)[0].ord) }
end
# Unescapes HTTP reserved and unwise characters in +str+
def unescape_uri(str)
str = str.dup
str = binary_encode(str)
str.gsub(ESCAPED) { ::Regexp.last_match(1).hex.chr }
end
# Unescape form encoded values in +str+
def unescape_form(str)
str = str.dup
str = binary_encode(str)
str.tr!('+', ' ')
str.gsub(ESCAPED) { ::Regexp.last_match(1).hex.chr }
end
# Performs validation on the passed header hash and returns a string representation of the headers
def headers_hash_to_s(headers)
headers_str = +''
headers.each do |key, values|
if key.to_s.match?(/[\r\n]/)
raise Excon::Errors::InvalidHeaderKey, "#{key.to_s.inspect} contains forbidden \"\\r\" or \"\\n\""
end
[values].flatten.each do |value|
if value.to_s.match?(/[\r\n]/)
# Don't include the potentially sensitive header value (i.e. authorization token) in the message
raise Excon::Errors::InvalidHeaderValue, "#{key} header value contains forbidden \"\\r\" or \"\\n\""
end
headers_str << key.to_s << ': ' << value.to_s << CR_NL
end
end
headers_str
end
end
end
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