Class: Falcon::Proxy
- Inherits:
-
Protocol::HTTP::Middleware
- Object
- Protocol::HTTP::Middleware
- Falcon::Proxy
- Defined in:
- lib/falcon/proxy.rb
Constant Summary collapse
- FORWARDED =
'forwarded'.freeze
- X_FORWARDED_FOR =
'x-forwarded-for'.freeze
- X_FORWARDED_PROTO =
'x-forwarded-proto'.freeze
- VIA =
'via'.freeze
- CONNECTION =
'connection'.freeze
- HOP_HEADERS =
[ 'connection', 'keep-alive', 'public', 'proxy-authenticate', 'transfer-encoding', 'upgrade', ]
Instance Attribute Summary collapse
-
#count ⇒ Object
readonly
Returns the value of attribute count.
Instance Method Summary collapse
- #call(request) ⇒ Object
- #close ⇒ Object
- #connect(endpoint) ⇒ Object
-
#initialize(app, hosts) ⇒ Proxy
constructor
A new instance of Proxy.
- #lookup(request) ⇒ Object
- #prepare_headers(headers) ⇒ Object
- #prepare_request(request, host) ⇒ Object
Constructor Details
#initialize(app, hosts) ⇒ Proxy
Returns a new instance of Proxy.
52 53 54 55 56 57 58 59 60 61 |
# File 'lib/falcon/proxy.rb', line 52 def initialize(app, hosts) super(app) @server_context = nil @hosts = hosts @clients = {} @count = 0 end |
Instance Attribute Details
#count ⇒ Object (readonly)
Returns the value of attribute count.
63 64 65 |
# File 'lib/falcon/proxy.rb', line 63 def count @count end |
Instance Method Details
#call(request) ⇒ Object
124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 |
# File 'lib/falcon/proxy.rb', line 124 def call(request) if host = lookup(request) @count += 1 request = self.prepare_request(request, host) client = connect(host.endpoint) client.call(request) else super end rescue Async.logger.error(self) {$!} return Protocol::HTTP::Response[502, {'content-type' => 'text/plain'}, ["#{$!.inspect}: #{$!.backtrace.join("\n")}"]] end |
#close ⇒ Object
65 66 67 68 69 |
# File 'lib/falcon/proxy.rb', line 65 def close @clients.each_value(&:close) super end |
#connect(endpoint) ⇒ Object
71 72 73 |
# File 'lib/falcon/proxy.rb', line 71 def connect(endpoint) @clients[endpoint] ||= Async::HTTP::Client.new(endpoint) end |
#lookup(request) ⇒ Object
75 76 77 78 79 80 |
# File 'lib/falcon/proxy.rb', line 75 def lookup(request) # Trailing dot and port is ignored/normalized. if = request.&.sub(/(\.)?(:\d+)?$/, '') return @hosts[] end end |
#prepare_headers(headers) ⇒ Object
82 83 84 85 86 87 88 |
# File 'lib/falcon/proxy.rb', line 82 def prepare_headers(headers) if connection = headers[CONNECTION] headers.extract(connection) end headers.extract(HOP_HEADERS) end |
#prepare_request(request, host) ⇒ Object
90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 |
# File 'lib/falcon/proxy.rb', line 90 def prepare_request(request, host) forwarded = [] Async.logger.debug(self) do |buffer| buffer.puts "Request authority: #{request.}" buffer.puts "Host authority: #{host.}" buffer.puts "Request: #{request.method} #{request.path} #{request.version}" buffer.puts "Request headers: #{request.headers.inspect}" end # The authority of the request must match the authority of the endpoint we are proxying to, otherwise SNI and other things won't work correctly. request. = host. if address = request.remote_address request.headers.add(X_FORWARDED_FOR, address.ip_address) forwarded << "for=#{address.ip_address}" end if scheme = request.scheme request.headers.add(X_FORWARDED_PROTO, scheme) forwarded << "proto=#{scheme}" end unless forwarded.empty? request.headers.add(FORWARDED, forwarded.join(';')) end request.headers.add(VIA, "#{request.version} #{self.class}") self.prepare_headers(request.headers) return request end |