Class: HTTPX::Request

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Includes:
Callbacks, Loggable
Defined in:
lib/httpx/request.rb,
sig/request.rbs

Overview

Defines how an HTTP request is handled internally, both in terms of making attributes accessible, as well as maintaining the state machine which manages streaming the request onto the wire.

Direct Known Subclasses

Plugins::Proxy::HTTP::ConnectRequest

Defined Under Namespace

Classes: Body

Constant Summary collapse

ALLOWED_URI_SCHEMES = 
%w[https http].freeze
METHODS = 

      
        
USER_AGENT =
          
        

        

      
    

  



  
  
  
Constants included
     from Loggable

  
Loggable::COLORS, Loggable::USE_DEBUG_LOG



  
Instance Attribute Summary collapse

  




  
    

      Instance Method Summary
      collapse
    


    
    
  


  
  
  
  
  
  
  
  
  
  
  
Methods included from Callbacks

  
#callbacks, #callbacks_for?, #emit, #on, #once


  
  
  
  
  
  
  
  
  
  
Methods included from Loggable

  
#log, #log_exception, log_identifiers, #log_redact, #log_redact_body, #log_redact_headers



  
Constructor Details

  
    

  

  
    #initialize(verb, uri, options, params = EMPTY_HASH)  ⇒ Request 
  

  

  




  

    
initializes the instance with the given verb (an upppercase String, ex. 'GEt'),
an absolute or relative uri (either as String or URI::HTTP object), the
request options (instance of HTTPX::Options) and an optional Hash of params.


Besides any of the options documented in HTTPX::Options (which would override or merge with what
options sets), it accepts also the following:


:params :: hash or array of key-values which will be encoded and set in the query string of request uris.
:body :: to be encoded in the request body payload. can be a String, an IO object (i.e. a File), or an Enumerable.
:form :: hash of array of key-values which will be form-urlencoded- or multipart-encoded in requests body payload.
:json :: hash of array of key-values which will be JSON-encoded in requests body payload.
:xml :: Nokogiri XML nodes which will be encoded in requests body payload.
:http2_stream_options :: hash of options to be used to set the HTTP/2 priority by sending an initial PRIORITY frame.


:body, :form, :json and :xml are all mutually exclusive, i.e. only one of them gets picked up.


  





  

Raises:





  

    
      


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# File 'lib/httpx/request.rb', line 80

def initialize(verb, uri, options, params = EMPTY_HASH)
  @verb    = verb.to_s.upcase
  @uri     = Utils.to_uri(uri)

  @headers = options.headers.dup
  merge_headers(params.delete(:headers)) if params.key?(:headers)

  @query_params = params.delete(:params) if params.key?(:params)

  @http2_stream_options = params.key?(:http2_stream_options) ? params.delete(:http2_stream_options) : EMPTY_HASH

  @body = options.request_body_class.new(@headers, options, **params)

  @options = @body.options

  if @uri.relative? || @uri.host.nil?
    origin = @options.origin
    raise(Error, "invalid URI: #{@uri}") unless origin

    base_path = @options.base_path

    @uri = origin.merge("#{base_path}#{@uri}")
  end

  raise UnsupportedSchemeError, "#{@uri}: #{@uri.scheme}: unsupported URI scheme" unless ALLOWED_URI_SCHEMES.include?(@uri.scheme)

  @state = :idle
  @connection = @response =
    @drainer = @peer_address = @callbacks =
                 @informational_status = @on_response_arrived = nil
  @ping = @started = @complete = false
  @persistent = @options.persistent
  @active_timeouts = []
end


    		
  





  



  

    
Instance Attribute Details

    
      
      
      

  

  
    #active_timeouts  ⇒ Array[Timers::Timer]  (readonly)
  

  

  




  

    
Returns the value of attribute active_timeouts.


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 57

def active_timeouts
  @active_timeouts
end


    		
  





    
      
      
      

  

  
    #body  ⇒ Body  (readonly)
  

  

  




  

    
an HTTPX::Request::Body object containing the request body payload (or nil, whenn there is none).


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 28

def body
  @body
end


    		
  





    
      
      
      

  

  
    #connection=(value)  ⇒ Object  (writeonly)
  

  

  




  

    
the connection the request is currently being sent to (none if before or after transaction)


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 50

def connection=(value)
  @connection = value
end


    		
  





    
      
      
      

  

  
    #drain_error  ⇒ StandardError?  (readonly)
  

  

  




  

    
Exception raised during enumerable body writes.


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 40

def drain_error
  @drain_error
end


    		
  





    
      
      
      

  

  
    #headers  ⇒ Headers  (readonly)
  

  

  




  

    
an HTTPX::Headers object containing the request HTTP headers.


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 25

def headers
  @headers
end


    		
  





    
      
      
      

  

  
    #http2_stream_options  ⇒ { ?dependency: Integer, ?exclusive: bool, ?weight: Integer }  (readonly)
  

  

  




  

    
when this request is sent via HTTP/2, it'll use this hash of options to set the priority of the
respective HTTP/2 frame.


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 44

def http2_stream_options
  @http2_stream_options
end


    		
  





    
      
      
      

  

  
    #on_response_arrived=(value)  ⇒ Object  (writeonly)
  

  

  




  

    
callback triggered when a response (which may not be the final response) was assigned to the request.


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 53

def on_response_arrived=(value)
  @on_response_arrived = value
end


    		
  





    
      
      
      

  

  
    #options  ⇒ Options  (readonly)
  

  

  




  

    
an HTTPX::Options object containing request options.


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 34

def options
  @options
end


    		
  





    
      
      
      

  

  
    #peer_address  ⇒ String, ... 
  

  

  




  

    
The IP address from the peer server.


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 47

def peer_address
  @peer_address
end


    		
  





    
      
      
      

  

  
    #persistent=(value)  ⇒ Object  (writeonly)
  

  

  




  

    
Sets the attribute persistent


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 55

def persistent=(value)
  @persistent = value
end


    		
  





    
      
      
      

  

  
    #response  ⇒ response? 
  

  

  




  

    
the corresponding HTTPX::Response object, when there is one.


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 37

def response
  @response
end


    		
  





    
      
      
      

  

  
    #state  ⇒ Symbol  (readonly)
  

  

  




  

    
a symbol describing which frame is currently being flushed.


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 31

def state
  @state
end


    		
  





    
      
      
      

  

  
    #uri  ⇒ http_uri  (readonly)
  

  

  




  

    
the absolute URI object for this request.


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 22

def uri
  @uri
end


    		
  





    
      
      
      

  

  
    #verb  ⇒ verb  (readonly)
  

  

  




  

    
the upcased string HTTP verb for this request.


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 19

def verb
  @verb
end


    		
  





    
  



  

    
Instance Method Details


    
      

  

  
    #authority  ⇒ String 
  

  

  




  

    
returs the URI authority of the request.


session.build_request("GET", "https://google.com/query").authority #=> "google.com"
session.build_request("GET", "http://internal:3182/a").authority #=> "internal:3182"


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 244

def authority
  @uri.authority
end


    		
  





    
      

  

  
    #can_buffer?  ⇒ Boolean 
  

  

  




  

    
      


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# File 'lib/httpx/request.rb', line 182

def can_buffer?
  @state != :done
end


    		
  





    
      

  

  
    #close  ⇒ void 
  

  

  




  

    
      


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# File 'sig/request.rbs', line 49

def close: () -> void


    		
  





    
      

  

  
    #complete!(response = @response)  ⇒ Boolean 
  

  

  




  

    
      


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# File 'lib/httpx/request.rb', line 123

def complete!(response = @response)
  return false if @complete

  emit(:complete, response)
  reset_timers(true)
  @complete = true
end


    		
  





    
      

  

  
    #drain_body  ⇒ String? 
  

  

  




  

    
consumes and returns the next available chunk of request body that can be sent


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 274

def drain_body
  return if @body.nil?

  @drainer ||= @body.each
  @drainer.next.dup
rescue StopIteration
  nil
rescue StandardError => e
  # in case an error occurs while emitting body chunks
  @drain_error = e
  nil
end


    		
  





    
      

  

  
    #emit_response(response)  ⇒ void 
  

  

  




  

    
      


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# File 'lib/httpx/request.rb', line 364

def emit_response(response)
  emit(:response, response)

  return unless @on_response_arrived

  @on_response_arrived.call
end


    		
  





    
      

  

  
    #empty?  ⇒ Boolean 
  

  

  




  

    
      


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# File 'sig/request.rbs', line 47

def empty?: () -> bool


    		
  





    
      

  

  
    #expects?  ⇒ Boolean 
  

  

  




  

    
whether the request supports the 100-continue handshake and already processed the 100 response.


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 341

def expects?
  @headers["expect"] == "100-continue" && @informational_status == 100 && !@response
end


    		
  





    
      

  

  
    #handle_error(error)  ⇒ void 
  

  

  




  

    
      


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# File 'lib/httpx/request.rb', line 354

def handle_error(error)
  if (connection = @connection)
    connection.on_error(error, self)
  else
    response = ErrorResponse.new(self, error)
    self.response = response
    emit_response(response)
  end
end


    		
  





    
      

  

  
    #initialize_dup(orig)  ⇒ Object 
  

  

  




  

    
dupped initialization


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 116

def initialize_dup(orig)
  super
  @headers = orig.instance_variable_get(:@headers).dup
  @body = orig.instance_variable_get(:@body).dup
  @active_timeouts = orig.instance_variable_get(:@active_timeouts).dup
end


    		
  





    
      

  

  
    #inspect  ⇒ String 
  

  

  




  

    
simplecov:disable


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 288

def inspect
  "#<#{self.class}:#{object_id} " \
    "#{@verb} " \
    "#{uri} " \
    "@headers=#{@headers} " \
    "@body=#{@body}>"
end


    		
  





    
      

  

  
    #interests  ⇒ :r, :w 
  

  

  




  

    
returns :r or :w, depending on whether the request is waiting for a response or flushing.


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 176

def interests
  return :r if @state == :done || @state == :expect

  :w
end


    		
  





    
      

  

  
    #merge_headers(h)  ⇒ void 
  

  

  




  

    
This method returns an undefined value.
merges h into the instance of HTTPX::Headers of the request.


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 191

def merge_headers(h)
  @headers = @headers.merge(h)
  return unless @headers.key?("range")

  @headers.delete("accept-encoding")
end


    		
  





    
      

  

  
    #origin  ⇒ String 
  

  

  




  

    
returs the URI origin of the request.


session.build_request("GET", "https://google.com/query").authority #=> "https://google.com"
session.build_request("GET", "http://internal:3182/a").authority #=> "http://internal:3182"


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 252

def origin
  @uri.origin
end


    		
  





    
      

  

  
    #path  ⇒ String 
  

  

  




  

    
returnns the URI path of the request uri.


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 232

def path
  path = uri.path.dup
  path =  +"" if path.nil?
  path << "/" if path.empty?
  path << "?#{query}" unless query.empty?
  path
end


    		
  





    
      

  

  
    #persistent?  ⇒ Boolean 
  

  

  




  

    
      


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# File 'lib/httpx/request.rb', line 161

def persistent?
  @persistent
end


    		
  





    
      

  

  
    #ping!  ⇒ void 
  

  

  




  

    
This method returns an undefined value.
marks the request as having been buffered with a ping


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 137

def ping!
  @ping = true
end


    		
  





    
      

  

  
    #ping?  ⇒ Boolean 
  

  

  




  

    
whether request has been buffered with a ping


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 132

def ping?
  @ping
end


    		
  





    
      

  

  
    #query  ⇒ String 
  

  

  




  

    
returs the URI query string of the request (when available).


session.build_request("GET", "https://search.com").query #=> ""
session.build_request("GET", "https://search.com?q=a").query #=> "q=a"
session.build_request("GET", "https://search.com", params: { q: "a"}).query #=> "q=a"
session.build_request("GET", "https://search.com?q=a", params: { foo: "bar"}).query #=> "q=a&foo&bar"


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 262

def query
  return @query if defined?(@query)

  query = []
  if (q = @query_params) && !q.empty?
    query << Transcoder::Form.encode(q)
  end
  query << @uri.query if @uri.query
  @query = query.join("&")
end


    		
  





    
      

  

  
    #read_timeout  ⇒ interval? 
  

  

  




  

    
the read timeout defined for this request.


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 142

def read_timeout
  @options.timeout[:read_timeout]
end


    		
  





    
      

  

  
    #request_timeout  ⇒ interval? 
  

  

  




  

    
the request timeout defined for this request.


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 152

def request_timeout
  @options.timeout[:request_timeout]
end


    		
  





    
      

  

  
    #reset_timers(reset_total_request_timers)  ⇒ void 
  

  

  




  

    
      


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# File 'lib/httpx/request.rb', line 374

def reset_timers(reset_total_request_timers)
  timers = @active_timeouts

  until (timer = timers.shift).nil?
    next if !reset_total_request_timers && timer.label == :total_request_timeout

    # cancel active timers.
    timer.cancel
  end
end


    		
  





    
      

  

  
    #scheme  ⇒ String 
  

  

  




  

    
the URI scheme of the request uri.


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 199

def scheme
  @uri.scheme
end


    		
  





    
      

  

  
    #set_timeout_callback(event) {|arg0| ... } ⇒ void 
  

  

  




  

    
This method returns an undefined value.


  





  

Yields:


    
  
    
  • 
      
      
        
      
      
      
    
    • 
  



Yield Parameters:


    
  
    
  • 
      
        arg0
      
      
        (Object)
      
      
      
    
    • 
  



Yield Returns:


    
  
    
  • 
      
      
        (void)
      
      
      
    
    • 
  





  

    
      


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# File 'lib/httpx/request.rb', line 345

def set_timeout_callback(event, &callback)
  clb = once(event, &callback)

  # reset timeout callbacks when requests get rerouted to a different connection
  once(:idle) do
    callbacks(event).delete(clb)
  end
end


    		
  





    
      

  

  
    #started?  ⇒ Boolean 
  

  

  




  

    
      


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# File 'lib/httpx/request.rb', line 186

def started?
  @started
end


    		
  





    
      

  

  
    #total_request_timeout  ⇒ Object 
  

  

  




  

    
the total request timeout defined for this request.


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 157

def total_request_timeout
  @options.timeout[:total_request_timeout]
end


    		
  





    
      

  

  
    #trailers  ⇒ Headers 
  

  

  




  

    
returns an instance of HTTPX::Headers containing the trailer headers


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 171

def trailers
  @trailers ||= @options.headers_class.new
end


    		
  





    
      

  

  
    #trailers?  ⇒ Boolean 
  

  

  




  

    
if the request contains trailer headers


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 166

def trailers?
  defined?(@trailers)
end


    		
  





    
      

  

  
    #transition(nextstate)  ⇒ void 
  

  

  




  

    
This method returns an undefined value.
moves on to the nextstate of the request state machine (when all preconditions are met)


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 298

def transition(nextstate)
  case nextstate
  when :idle
    @body.rewind
    @ping = @complete = false
    @response = @drainer = nil

    # request may be sent to a different connection and will be
    # reassigned a new set of timers.
    reset_timers(false)
  when :headers
    return unless @state == :idle

    @started = true
  when :body
    return unless @state == :headers ||
                  @state == :expect

    if @headers.key?("expect")
      if @informational_status && @informational_status == 100
        # check for 100 Continue response, and deallocate the var
        # if @informational_status == 100
        #   @response = nil
        # end
      else
        return if @state == :expect # do not re-set it

        nextstate = :expect
      end
    end
  when :trailers
    return unless @state == :body
  when :done
    return if @state == :expect

  end
  log(level: 3) { "#{@state} -> #{nextstate}" }
  @state = nextstate
  emit(@state, self)
  nil
end


    		
  





    
      

  

  
    #write_timeout  ⇒ interval? 
  

  

  




  

    
the write timeout defined for this request.


  





  



  

    
      


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# File 'lib/httpx/request.rb', line 147

def write_timeout
  @options.timeout[:write_timeout]
end