Class: FaradayMiddleware::FollowRedirects

Inherits:
Faraday::Middleware
  • Object
show all
Defined in:
lib/faraday_middleware/response/follow_redirects.rb

Overview

Public: Follow HTTP 301, 302, 303, 307, and 308 redirects.

For HTTP 301, 302, and 303, the original GET, POST, PUT, DELETE, or PATCH request gets converted into a GET. With :standards_compliant => true, however, the HTTP method after 301/302 remains unchanged. This allows you to opt into HTTP/1.1 compliance and act unlike the major web browsers.

This middleware currently only works with synchronous requests; i.e. it doesn't support parallelism.

If you wish to persist cookies across redirects, you could use the faraday-cookie_jar gem:

Faraday.new(:url => url) do |faraday|
faraday.use FaradayMiddleware::FollowRedirects
faraday.use :cookie_jar
faraday.adapter Faraday.default_adapter
end

Constant Summary collapse

ALLOWED_METHODS =

HTTP methods for which 30x redirects can be followed

Set.new %i[head options get post put patch delete]
REDIRECT_CODES =

HTTP redirect status codes that this middleware implements

Set.new [301, 302, 303, 307, 308]
ENV_TO_CLEAR =

Keys in env hash which will get cleared between requests

Set.new %i[status response response_headers]
FOLLOW_LIMIT =

Default value for max redirects followed

3
URI_UNSAFE =

Regex that matches characters that need to be escaped in URLs, sans the "%" character which we assume already represents an escaped sequence.

%r{[^\-_.!~*'()a-zA-Z\d;/?:@&=+$,\[\]%]}.freeze
AUTH_HEADER = 
'Authorization'

Instance Method Summary collapse

Constructor Details

#initialize(app, options = {}) ⇒ FollowRedirects

Public: Initialize the middleware.

options - An options Hash (default: {}): :limit - A Numeric redirect limit (default: 3) :standards_compliant - A Boolean indicating whether to respect the HTTP spec when following 301/302 (default: false) :callback - A callable used on redirects with the old and new envs :cookies - An Array of Strings (e.g. ['cookie1', 'cookie2']) to choose cookies to be kept, or :all to keep all cookies (default: []). :clear_authorization_header - A Boolean indicating whether the request Authorization header should be cleared on redirects (default: true)



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# File 'lib/faraday_middleware/response/follow_redirects.rb', line 58

def initialize(app, options = {})
  super(app)
  @options = options

  @convert_to_get = Set.new [303]
  @convert_to_get << 301 << 302 unless standards_compliant?
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/faraday_middleware/response/follow_redirects.rb', line 66

def call(env)
  perform_with_redirection(env, follow_limit)
end