Class: Falcon::Middleware::Proxy
- Inherits:
-
Protocol::HTTP::Middleware
- Object
- Protocol::HTTP::Middleware
- Falcon::Middleware::Proxy
- Defined in:
- lib/falcon/middleware/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.
55 56 57 58 59 60 61 62 63 64 |
# File 'lib/falcon/middleware/proxy.rb', line 55 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.
66 67 68 |
# File 'lib/falcon/middleware/proxy.rb', line 66 def count @count end |
Instance Method Details
#call(request) ⇒ Object
127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 |
# File 'lib/falcon/middleware/proxy.rb', line 127 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}: #{$!.backtrace.join("\n")}"]] end |
#close ⇒ Object
68 69 70 71 72 |
# File 'lib/falcon/middleware/proxy.rb', line 68 def close @clients.each_value(&:close) super end |
#connect(endpoint) ⇒ Object
74 75 76 |
# File 'lib/falcon/middleware/proxy.rb', line 74 def connect(endpoint) @clients[endpoint] ||= Async::HTTP::Client.new(endpoint) end |
#lookup(request) ⇒ Object
78 79 80 81 82 83 |
# File 'lib/falcon/middleware/proxy.rb', line 78 def lookup(request) # Trailing dot and port is ignored/normalized. if = request.&.sub(/(\.)?(:\d+)?$/, '') return @hosts[] end end |
#prepare_headers(headers) ⇒ Object
85 86 87 88 89 90 91 |
# File 'lib/falcon/middleware/proxy.rb', line 85 def prepare_headers(headers) if connection = headers[CONNECTION] headers.extract(connection) end headers.extract(HOP_HEADERS) end |
#prepare_request(request, host) ⇒ Object
93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 |
# File 'lib/falcon/middleware/proxy.rb', line 93 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 |