Class: Async::HTTP::Protocol::HTTP2
- Inherits:
-
Object
- Object
- Async::HTTP::Protocol::HTTP2
- Defined in:
- lib/async/http/protocol/http2.rb
Overview
A server that supports both HTTP1.0 and HTTP1.1 semantics by detecting the version of the request.
Constant Summary collapse
- HTTPS =
'https'.freeze
- SCHEME =
':scheme'.freeze
- METHOD =
':method'.freeze
- PATH =
':path'.freeze
- AUTHORITY =
':authority'.freeze
- REASON =
':reason'.freeze
- STATUS =
':status'.freeze
- VERSION =
'HTTP/2.0'.freeze
Instance Attribute Summary collapse
-
#count ⇒ Object
readonly
Returns the value of attribute count.
Class Method Summary collapse
Instance Method Summary collapse
- #call(request) ⇒ Object
- #close ⇒ Object
-
#good? ⇒ Boolean
Can we use this connection to make requests?.
-
#initialize(controller, stream) ⇒ HTTP2
constructor
A new instance of HTTP2.
-
#multiplex ⇒ Object
Multiple requests can be processed at the same time.
- #read_in_background(task: Task.current) ⇒ Object
- #receive_requests(task: Task.current, &block) ⇒ Object
- #reusable? ⇒ Boolean
- #start_connection ⇒ Object
- #version ⇒ Object
Constructor Details
#initialize(controller, stream) ⇒ HTTP2
Returns a new instance of HTTP2.
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# File 'lib/async/http/protocol/http2.rb', line 52 def initialize(controller, stream) @controller = controller @stream = stream @controller.on(:frame) do |data| @stream.write(data) @stream.flush end @controller.on(:frame_sent) do |frame| Async.logger.debug(self) {"Sent frame: #{frame.inspect}"} end @controller.on(:frame_received) do |frame| Async.logger.debug(self) {"Received frame: #{frame.inspect}"} end @goaway = false @controller.on(:goaway) do |payload| Async.logger.error(self) {"goaway: #{payload.inspect}"} @goaway = true end @count = 0 end |
Instance Attribute Details
#count ⇒ Object (readonly)
Returns the value of attribute count.
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# File 'lib/async/http/protocol/http2.rb', line 80 def count @count end |
Class Method Details
.client(stream) ⇒ Object
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# File 'lib/async/http/protocol/http2.rb', line 35 def self.client(stream) self.new(::HTTP2::Client.new, stream) end |
.server(stream) ⇒ Object
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# File 'lib/async/http/protocol/http2.rb', line 39 def self.server(stream) self.new(::HTTP2::Server.new, stream) end |
Instance Method Details
#call(request) ⇒ Object
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# File 'lib/async/http/protocol/http2.rb', line 195 def call(request) request.version ||= self.version stream = @controller.new_stream @count += 1 headers = Headers::Merged.new({ SCHEME => HTTPS, METHOD => request.method, PATH => request.path, AUTHORITY => request., }, request.headers) finished = Async::Notification.new exception = nil response = Response.new response.version = self.version response.headers = Headers.new body = Body::Writable.new response.body = body stream.on(:headers) do |headers| headers.each do |key, value| if key == STATUS response.status = value.to_i elsif key == REASON response.reason = value else response.headers[key] = value end end # At this point, we are now expecting two events: data and close. stream.on(:close) do |error| # If we receive close after this point, it's not a request error, but a failure we need to signal to the body. if error body.stop(EOFError.new(error)) else body.finish end end finished.signal end stream.on(:data) do |chunk| body.write(chunk.to_s) unless chunk.empty? end stream.on(:close) do |error| # The remote server has closed the connection while we were sending the request. if error exception = EOFError.new(error) finished.signal end end if request.body.nil? or request.body.empty? stream.headers(headers, end_stream: true) request.body.read if request.body else begin stream.headers(headers) rescue raise RequestFailed.new end request.body.each do |chunk| stream.data(chunk, end_stream: false) end stream.data("") end start_connection @stream.flush Async.logger.debug(self) {"Stream flushed, waiting for signal."} finished.wait if exception raise exception end Async.logger.debug(self) {"Stream finished: #{response.inspect}"} return response end |
#close ⇒ Object
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# File 'lib/async/http/protocol/http2.rb', line 116 def close Async.logger.debug(self) {"Closing connection"} @reader.stop if @reader @stream.close end |
#good? ⇒ Boolean
Can we use this connection to make requests?
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# File 'lib/async/http/protocol/http2.rb', line 88 def good? @stream.connected? end |
#multiplex ⇒ Object
Multiple requests can be processed at the same time.
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# File 'lib/async/http/protocol/http2.rb', line 83 def multiplex @controller.remote_settings[:settings_max_concurrent_streams] end |
#read_in_background(task: Task.current) ⇒ Object
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# File 'lib/async/http/protocol/http2.rb', line 104 def read_in_background(task: Task.current) task.async do |nested_task| nested_task.annotate("#{version} reading data") while buffer = @stream.read_partial @controller << buffer end Async.logger.debug(self) {"Connection reset by peer!"} end end |
#receive_requests(task: Task.current, &block) ⇒ Object
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# File 'lib/async/http/protocol/http2.rb', line 123 def receive_requests(task: Task.current, &block) # emits new streams opened by the client @controller.on(:stream) do |stream| request = Request.new request.version = self.version request.headers = Headers.new body = Body::Writable.new request.body = body stream.on(:headers) do |headers| headers.each do |key, value| if key == METHOD request.method = value elsif key == PATH request.path = value elsif key == AUTHORITY request. = value else request.headers[key] = value end end end stream.on(:data) do |chunk| # puts "Got request data: #{chunk.inspect}" body.write(chunk.to_s) unless chunk.empty? end stream.on(:close) do |error| if error body.stop(EOFError.new(error)) end end stream.on(:half_close) do # The requirements for this to be in lock-step with other opertaions is minimal. # TODO consider putting this in it's own async task. begin # We are no longer receiving any more data frames: body.finish # Generate the response: response = yield request headers = {STATUS => response.status.to_s} headers.update(response.headers) if response.body.nil? or response.body.empty? stream.headers(headers, end_stream: true) response.body.read if response.body else stream.headers(headers, end_stream: false) response.body.each do |chunk| stream.data(chunk, end_stream: false) end stream.data("", end_stream: true) end rescue Async.logger.error(self) {$!} # Generating the response failed. stream.close(:internal_error) end end end start_connection @reader.wait end |
#reusable? ⇒ Boolean
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# File 'lib/async/http/protocol/http2.rb', line 92 def reusable? !@goaway || !@stream.closed? end |
#start_connection ⇒ Object
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# File 'lib/async/http/protocol/http2.rb', line 100 def start_connection @reader ||= read_in_background end |
#version ⇒ Object
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# File 'lib/async/http/protocol/http2.rb', line 96 def version VERSION end |