Class: HTTP::Client::Request

Inherits:
Object
  • Object
show all
Defined in:
lib/http/client.rb

Constant Summary collapse

VALID_PARAMETERS = 
%w(headers files query body auth timeout open_timeout ssl_timeout read_timeout max_redirects ssl_verify jar)
DEFAULT_HEADERS = 
{'User-Agent' => 'HTTP Client API/1.0'}
REDIRECT_WITH_GET = 
[301, 302, 303]
REDIRECT_WITH_ORIGINAL = 
[307, 308]
VALID_VERBS = 
[GET, HEAD, PUT, POST, DELETE, OPTIONS, TRACE]
VALID_SSL_VERIFICATIONS = 
[SSL_VERIFY_NONE, SSL_VERIFY_PEER]
VALID_REDIRECT_CODES = 
REDIRECT_WITH_GET + REDIRECT_WITH_ORIGINAL

Instance Method Summary collapse

Constructor Details

#initialize(verb, uri, args = {}) ⇒ HTTP::Client::Request

Create a new HTTP Client Request.

Examples:

Retrieve a page using GET.

request  = HTTP::Client::Request.new(:get, "http://www.example.org/", query: {q: "search something"})
response = request.execute

Handle redirects.

request  = HTTP::Client::Request.new(:get, "http://www.example.org/", max_redirects: 3)
response = request.execute

Perform request and return result in one go.

response = HTTP::Client.get("http://www.example.org/", max_redirects: 3)

Upload a few files in a POST request.

request  = HTTP::Client::Request.new(
  :post, "http://www.example.org/",
  files: {"cats" => "cats.jpg", "dogs" => "dogs.jpg"},
  query: {title: "cute pics"}
)
response = request.execute

Pass in an external cookie jar.

jar  = HTTP::CookieJar.new
jar.load("mycookies.cky")
response = HTTP::Client.get("http://www.example.org/", jar: jar)

Parameters:

  • verb (Symbol) —

    HTTP verb, one of :get, :head, :put, :post, :delete, :options, :trace.

  • uri (String or URI) —

    Remote URI.

  • args (Hash) (defaults to: {}) —

    Options, see below.

Options Hash (args):

  • headers (Hash) —

    Net::HTTP headers, in key-value pairs.

  • query (Hash) —

    Net::HTTP query-string in key-value pairs.

  • files (Hash) —

    Multi-part file uploads, in key-value pairs of name & path or name & File object.

  • body (String) —

    Request body.

  • auth (Hash) —

    Basic-Auth hash. Requires :username and :password.

  • timeout (Integer) —

    Fixed timeout for connection, read and ssl handshake in seconds.

  • open_timeout (Integer) —

    Connection timeout in seconds.

  • read_timeout (Integer) —

    Read timeout in seconds.

  • ssl_timeout (Integer) —

    SSL handshake timeout in seconds.

  • max_redirects (Integer) —

    Max redirect follow, default: 0

  • ssl_verify (Integer) —

    OpenSSL verification, SSL_VERIFY_PEER (default) or SSL_VERIFY_NONE.

  • jar (HTTP::CookieJar) —

    Optional cookie jar to use. Relies on HTTP::CookieJar from http-cookie gem.



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# File 'lib/http/client.rb', line 80

def initialize verb, uri, args = {}
  args.each do |k, v|
    raise Error::Argument, "unknown argument #{k}" unless VALID_PARAMETERS.include?(k.to_s)
  end

  uri       = parse_uri!(uri)
  @delegate = create_request_delegate(verb, uri, args)

  if body = args[:body]
    raise Error::Argument, "#{verb} cannot have body" unless @delegate.class.const_get(:REQUEST_HAS_BODY)
    @delegate.body = body
  end

  if auth = args[:auth]
    @delegate.basic_auth(auth.fetch(:username), auth.fetch(:password))
  end

  # generic timeout
  if timeout = args[:timeout]
    @open_timeout = timeout
    @ssl_timeout  = timeout
    @read_timeout = timeout
  end

  # overrides
  @open_timeout = args[:open_timeout] if args[:open_timeout]
  @ssl_timeout  = args[:ssl_timeout]  if args[:ssl_timeout]
  @read_timeout = args[:read_timeout] if args[:read_timeout]

  @max_redirects = args.fetch(:max_redirects, 0)
  @ssl_verify    = args.fetch(:ssl_verify, SSL_VERIFY_PEER)
  @jar           = args.fetch(:jar, HTTP::CookieJar.new)
end

Instance Method Details

#execute ⇒ HTTP::Client::Response

Executes a request.

Returns:



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# File 'lib/http/client.rb', line 118

def execute
  last_effective_uri = uri

  cookie = HTTP::Cookie.cookie_value(@jar.cookies(uri))
  if cookie && !cookie.empty?
    @delegate.add_field('Cookie', cookie)
  end

  response = request!(uri, @delegate)
  @jar.parse(response['set-cookie'].to_s, uri)

  redirects = 0
  while redirects < @max_redirects && VALID_REDIRECT_CODES.include?(response.code.to_i)
    redirects         += 1
    last_effective_uri = parse_uri! response['location']
    redirect_delegate  = redirect_to(last_effective_uri, response.code.to_i)

    cookie = HTTP::Cookie.cookie_value(@jar.cookies(last_effective_uri))
    if cookie && !cookie.empty?
      redirect_delegate.add_field('Cookie', cookie)
    end

    response = request!(last_effective_uri, redirect_delegate)
    @jar.parse(response['set-cookie'].to_s, last_effective_uri)
  end

  Response.new(response, last_effective_uri)
end