Class: Faraday::Connection

Inherits:
Object show all
Includes:
Addressable, Rack::Utils
Defined in:
lib/faraday/connection.rb

Constant Summary collapse

HEADERS = 
Hash.new do |h, k|
  if k.respond_to?(:to_str)
    k
  else 
    k.to_s.split('_').            # :user_agent => %w(user agent)
      each { |w| w.capitalize! }. # => %w(User Agent)
      join('-')                   # => "User-Agent"
  end
end
METHODS = 
Set.new [:get, :post, :put, :delete, :head]
METHODS_WITH_BODIES = 
Set.new [:post, :put]

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(url = nil, options = {}, &block) ⇒ Connection

:url :params :headers :request :ssl



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# File 'lib/faraday/connection.rb', line 33

def initialize(url = nil, options = {}, &block)
  if url.is_a?(Hash)
    options = url
    url     = options[:url]
  end
  @headers          = HeaderHash.new
  @params           = {}
  @options          = options[:request] || {}
  @ssl              = options[:ssl]     || {}
  @parallel_manager = options[:parallel]
  self.url_prefix = url if url
  proxy(options[:proxy])
  merge_params  @params,  options[:params]  if options[:params]
  merge_headers @headers, options[:headers] if options[:headers]

  if block
    @builder = Builder.new
    @builder.build { block.call(self) }
  else
    @builder = options[:builder] || Builder.new
  end
end

Instance Attribute Details

#builder ⇒ Object (readonly)

Returns the value of attribute builder.



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# File 'lib/faraday/connection.rb', line 26

def builder
  @builder
end

#headers ⇒ Object

Returns the value of attribute headers.



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# File 'lib/faraday/connection.rb', line 25

def headers
  @headers
end

#host ⇒ Object

Returns the value of attribute host.



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# File 'lib/faraday/connection.rb', line 25

def host
  @host
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/faraday/connection.rb', line 26

def options
  @options
end

#parallel_manager ⇒ Object

Returns the value of attribute parallel_manager.



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# File 'lib/faraday/connection.rb', line 25

def parallel_manager
  @parallel_manager
end

#params ⇒ Object

Returns the value of attribute params.



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# File 'lib/faraday/connection.rb', line 25

def params
  @params
end

#path_prefix ⇒ Object

Returns the value of attribute path_prefix.



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# File 'lib/faraday/connection.rb', line 26

def path_prefix
  @path_prefix
end

#port ⇒ Object

Returns the value of attribute port.



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# File 'lib/faraday/connection.rb', line 25

def port
  @port
end

#scheme ⇒ Object

Returns the value of attribute scheme.



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# File 'lib/faraday/connection.rb', line 25

def scheme
  @scheme
end

#ssl ⇒ Object (readonly)

Returns the value of attribute ssl.



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# File 'lib/faraday/connection.rb', line 26

def ssl
  @ssl
end

Instance Method Details

#adapter(key, *args, &block) ⇒ Object 



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# File 'lib/faraday/connection.rb', line 68

def adapter(key, *args, &block)
  @builder.adapter(key, *args, &block)
end

#basic_auth(login, pass) ⇒ Object 



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# File 'lib/faraday/connection.rb', line 96

def basic_auth(, pass)
  @headers['authorization'] = "Basic #{Base64.encode64("#{}:#{pass}").strip}"
end

#build(options = {}, &block) ⇒ Object 



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# File 'lib/faraday/connection.rb', line 72

def build(options = {}, &block)
  @builder.build(options, &block)
end

#build_url(url, params = nil) ⇒ Object

Takes a relative url for a request and combines it with the defaults set on the connection instance.

conn = Faraday::Connection.new { ... }
conn.url_prefix = "https://sushi.com/api?token=abc"
conn.scheme      # => https
conn.path_prefix # => "/api"

conn.build_url("nigiri?page=2")      # => https://sushi.com/api/nigiri?token=abc&page=2
conn.build_url("nigiri", :page => 2) # => https://sushi.com/api/nigiri?token=abc&page=2



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# File 'lib/faraday/connection.rb', line 201

def build_url(url, params = nil)
  uri          = URI.parse(url.to_s)
  if @path_prefix && uri.path !~ /^\//
    uri.path = "#{@path_prefix.size > 1 ? @path_prefix : nil}/#{uri.path}"
  end
  uri.host   ||= @host
  uri.port   ||= @port
  uri.scheme ||= @scheme
  replace_query(uri, params)
  uri
end

#delete(url = nil, headers = nil, &block) ⇒ Object 



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# File 'lib/faraday/connection.rb', line 92

def delete(url = nil, headers = nil, &block)
  run_request(:delete, url, nil, headers, &block)
end

#dup ⇒ Object 



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# File 'lib/faraday/connection.rb', line 213

def dup
  self.class.new(build_url(''), :headers => headers.dup, :params => params.dup, :builder => builder.dup)
end

#escape(s) ⇒ Object

Be sure to URI escape ‘+’ symbols to %2B. Otherwise, they get interpreted as spaces.



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# File 'lib/faraday/connection.rb', line 250

def escape(s)
  s.to_s.gsub(/([^a-zA-Z0-9_.-]+)/n) do
    '%' << $1.unpack('H2'*bytesize($1)).join('%').tap { |c| c.upcase! }
  end
end

#get(url = nil, headers = nil, &block) ⇒ Object 



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# File 'lib/faraday/connection.rb', line 76

def get(url = nil, headers = nil, &block)
  run_request(:get, url, nil, headers, &block)
end

#head(url = nil, headers = nil, &block) ⇒ Object 



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# File 'lib/faraday/connection.rb', line 88

def head(url = nil, headers = nil, &block)
  run_request(:head, url, nil, headers, &block)
end

#in_parallel(manager) ⇒ Object 



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# File 'lib/faraday/connection.rb', line 114

def in_parallel(manager)
  @parallel_manager = manager
  yield
  @parallel_manager && @parallel_manager.run
ensure
  @parallel_manager = nil
end

#in_parallel? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/faraday/connection.rb', line 110

def in_parallel?
  !!@parallel_manager
end

#merge_headers(existing_headers, new_headers) ⇒ Object

turns headers keys and values into strings. Look up symbol keys in the the HEADERS hash.

h = merge_headers(HeaderHash.new, :content_type => 'text/plain')
h['Content-Type'] # = 'text/plain'



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# File 'lib/faraday/connection.rb', line 242

def merge_headers(existing_headers, new_headers)
  new_headers.each do |key, value|
    existing_headers[HEADERS[key]] = value.to_s
  end
end

#merge_params(existing_params, new_params) ⇒ Object

turns param keys into strings



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# File 'lib/faraday/connection.rb', line 230

def merge_params(existing_params, new_params)
  new_params.each do |key, value|
    existing_params[key.to_s] = value
  end
end

#post(url = nil, body = nil, headers = nil, &block) ⇒ Object 



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# File 'lib/faraday/connection.rb', line 80

def post(url = nil, body = nil, headers = nil, &block)
  run_request(:post, url, body, headers, &block)
end

#proxy(arg = nil) ⇒ Object 



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# File 'lib/faraday/connection.rb', line 122

def proxy(arg = nil)
  return @proxy if arg.nil?

  @proxy = 
    case arg
      when String then {:uri => proxy_arg_to_uri(arg)}
      when URI    then {:uri => arg}
      when Hash   then arg
        if arg[:uri] = proxy_arg_to_uri(arg[:uri])
          arg
        else
          raise ArgumentError, "no :uri option."
        end
    end
end

#proxy_arg_to_uri(arg) ⇒ Object 



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# File 'lib/faraday/connection.rb', line 256

def proxy_arg_to_uri(arg)
  case arg
    when String then URI.parse(arg)
    when URI    then arg
  end
end

#put(url = nil, body = nil, headers = nil, &block) ⇒ Object 



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# File 'lib/faraday/connection.rb', line 84

def put(url = nil, body = nil, headers = nil, &block)
  run_request(:put, url, body, headers, &block)
end

#replace_query(uri, params) ⇒ Object 



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# File 'lib/faraday/connection.rb', line 217

def replace_query(uri, params)
  url_params = @params.dup
  if uri.query && !uri.query.empty?
    merge_params(url_params, parse_query(uri.query))
  end
  if params && !params.empty?
    merge_params(url_params, params)
  end
  uri.query = url_params.empty? ? nil : build_query(url_params)
  uri
end

#request(key, *args, &block) ⇒ Object 



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# File 'lib/faraday/connection.rb', line 60

def request(key, *args, &block)
  @builder.request(key, *args, &block)
end

#response(key, *args, &block) ⇒ Object 



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# File 'lib/faraday/connection.rb', line 64

def response(key, *args, &block)
  @builder.response(key, *args, &block)
end

#run_request(method, url, body, headers) ⇒ Object 



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# File 'lib/faraday/connection.rb', line 177

def run_request(method, url, body, headers)
  if !METHODS.include?(method)
    raise ArgumentError, "unknown http method: #{method}"
  end

  Request.run(self, method) do |req|
    req.url(url)                if url
    req.headers.update(headers) if headers
    req.body = body             if body
    yield req if block_given?
  end
end

#to_app ⇒ Object

return the assembled Rack application for this instance.



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# File 'lib/faraday/connection.rb', line 173

def to_app
  @builder.to_app
end

#token_auth(token, options = {}) ⇒ Object 



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# File 'lib/faraday/connection.rb', line 100

def token_auth(token, options = {})
  values = ["token=#{token.to_s.inspect}"]
  options.each do |key, value|
    values << "#{key}=#{value.to_s.inspect}"
  end
  # 21 = "Authorization: Token ".size
  comma = ",\n#{' ' * 21}"
  @headers['authorization'] = "Token #{values * comma}"
end

#url_prefix=(url) ⇒ Object

Parses the giving url with Addressable::URI and stores the individual components in this connection. These components serve as defaults for requests made by this connection.

conn = Faraday::Connection.new { ... }
conn.url_prefix = "https://sushi.com/api"
conn.scheme      # => https
conn.path_prefix # => "/api"

conn.get("nigiri?page=2") # accesses https://sushi.com/api/nigiri



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# File 'lib/faraday/connection.rb', line 149

def url_prefix=(url)
  uri              = URI.parse(url)
  self.scheme      = uri.scheme
  self.host        = uri.host
  self.port        = uri.port
  self.path_prefix = uri.path
  if uri.query && !uri.query.empty?
    merge_params @params, parse_query(uri.query)
  end
  if uri.user && uri.password
    basic_auth(uri.user, uri.password)
  end
end

#use(klass, *args, &block) ⇒ Object 



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# File 'lib/faraday/connection.rb', line 56

def use(klass, *args, &block)
  @builder.use(klass, *args, &block)
end