Class: Dommy::Request

Inherits:
Object
  • Object
show all
Includes:
Bridge::Methods
Defined in:
lib/dommy/fetch.rb

Overview

Request polyfill — minimal Fetch API Request object so callers constructing new Request(url, init) get a value with .url, .method, .headers, .body. The stub-based fetch doesn't consume it directly (it still takes (url, init)), but having Request available means JS code that constructs one before passing to fetch keeps working.

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Bridge::Methods

included

Constructor Details

#initialize(url, init = nil, window = nil) ⇒ Request

Returns a new instance of Request.



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# File 'lib/dommy/fetch.rb', line 569

def initialize(url, init = nil, window = nil)
  opts = init.is_a?(Hash) ? init : {}
  @window = window
  @url = url.to_s
  @method = (opts["method"] || opts[:method] || "GET").to_s.upcase
  @body = opts["body"] || opts[:body]
  raw_headers = opts["headers"] || opts[:headers] || {}
  @headers = Headers.new(raw_headers)
  # WHATWG "extract a body": normalize the body source to a byte string once
  # (shared with Response), so the Body consume methods (text/arrayBuffer/…)
  # read from it. A default Content-Type from the extraction is applied only
  # when the caller supplied none.
  unless @body.nil?
    @body_bytes, default_ct = Response.extract_body(@body)
    if default_ct && !@headers.__js_call__("has", ["content-type"])
      @headers.__js_call__("set", ["content-type", default_ct])
    end
  end
  @body_bytes ||= ""
  @credentials = (opts["credentials"] || opts[:credentials] || "same-origin").to_s
  @mode = (opts["mode"] || opts[:mode] || "cors").to_s
  @cache = (opts["cache"] || opts[:cache] || "default").to_s
  @redirect = (opts["redirect"] || opts[:redirect] || "follow").to_s
  # WHATWG: a Request ALWAYS has an associated signal (an AbortSignal). Use a
  # provided signal when present (so `request.signal` is the caller's own
  # controller signal — react-router add/removeEventListener's it directly),
  # else a fresh, never-aborted one. Never undefined, or consumers that read
  # `request.signal.removeEventListener` crash.
  sig = opts["signal"] || opts[:signal]
  @signal = sig.respond_to?(:__js_call__) ? sig : AbortSignal.new
end

Instance Attribute Details

#body ⇒ Object (readonly)

Returns the value of attribute body.



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# File 'lib/dommy/fetch.rb', line 567

def body
  @body
end

#cache ⇒ Object (readonly)

Returns the value of attribute cache.



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# File 'lib/dommy/fetch.rb', line 601

def cache
  @cache
end

#credentials ⇒ Object (readonly)

Returns the value of attribute credentials.



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# File 'lib/dommy/fetch.rb', line 601

def credentials
  @credentials
end

#headers ⇒ Object (readonly)

Returns the value of attribute headers.



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# File 'lib/dommy/fetch.rb', line 601

def headers
  @headers
end

#method ⇒ Object (readonly)

Returns the value of attribute method.



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# File 'lib/dommy/fetch.rb', line 567

def method
  @method
end

#mode ⇒ Object (readonly)

Returns the value of attribute mode.



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# File 'lib/dommy/fetch.rb', line 601

def mode
  @mode
end

#redirect ⇒ Object (readonly)

Returns the value of attribute redirect.



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# File 'lib/dommy/fetch.rb', line 601

def redirect
  @redirect
end

#signal ⇒ Object (readonly)

Returns the value of attribute signal.



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# File 'lib/dommy/fetch.rb', line 601

def signal
  @signal
end

#url ⇒ Object (readonly)

Returns the value of attribute url.



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# File 'lib/dommy/fetch.rb', line 567

def url
  @url
end

Instance Method Details

#__js_call__(method, _args) ⇒ Object 



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# File 'lib/dommy/fetch.rb', line 630

def __js_call__(method, _args)
  case method
  when "clone"
    Request.new(
      @url,
      {
        "method" => @method,
        "body" => @body,
        "headers" => @headers.to_h,
        "credentials" => @credentials,
        "mode" => @mode,
        "cache" => @cache,
        "redirect" => @redirect,
        "signal" => @signal
      },
      @window
    )
  when "text"
    consume_body { immediate(Response.utf8_decode(@body_bytes)) }
  when "json"
    consume_body do
      immediate(JSON.parse(Response.utf8_decode(@body_bytes)))
    rescue JSON::ParserError => e
      rejected(ErrorValue.new("JSON parse: #{e.message}"))
    end
  when "arrayBuffer"
    consume_body { immediate(Bridge::ArrayBuffer.new(@body_bytes.bytes)) }
  when "bytes"
    consume_body { immediate(Bridge::Bytes.new(@body_bytes.bytes)) }
  when "blob"
    ct = @headers.__js_call__("get", ["content-type"]) || ""
    consume_body { immediate(Blob.new([@body_bytes], {"type" => ct}, @window)) }
  end
end

#__js_get__(key) ⇒ Object 



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# File 'lib/dommy/fetch.rb', line 603

def __js_get__(key)
  case key
  when "url"
    @url
  when "method"
    @method
  when "headers"
    @headers
  when "body"
    @body
  when "credentials"
    @credentials
  when "mode"
    @mode
  when "cache"
    @cache
  when "redirect"
    @redirect
  when "signal"
    @signal
  else
    Bridge::ABSENT
  end
end