Class: HttpClient::Resource

Inherits:
Object
  • Object
show all
Defined in:
lib/http_client/resource.rb

Overview

A class that can be instantiated for access to a HTTPful resource, including authentication.

Example:

resource = HttpClient::Resource.new('http://some/resource')
jpg = resource.get(:accept => 'image/jpg')

With HTTP basic authentication:

resource = HttpClient::Resource.new('http://protected/resource', :user => 'user', :password => 'password')
resource.delete

With a timeout (seconds):

HttpClient::Resource.new('http://slow', :timeout => 10)

With an open timeout (seconds):

HttpClient::Resource.new('http://behindfirewall', :open_timeout => 10)

You can also use resources to share common headers. For headers keys, symbols are converted to strings. Example:

resource = HttpClient::Resource.new('http://some/resource', :headers => { :client_version => 1 })

This header will be transported as X-Client-Version (notice the X prefix, capitalization and hyphens)

Use the [] syntax to allocate subresources:

site = HttpClient::Resource.new('http://example.com', :user => 'adam', :password => 'mypasswd')
site['posts/1/comments'].post 'Good article.', :content_type => 'text/plain'

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(url, options = {}, backwards_compatibility = nil) ⇒ Resource

Returns a new instance of Resource.



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# File 'lib/http_client/resource.rb', line 39

def initialize(url, options={}, backwards_compatibility=nil)
  @url = url
  if options.class == Hash
    @options = options
  else # compatibility with previous versions
    @options = { :user => options, :password => backwards_compatibility }
  end
end

Instance Attribute Details

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/http_client/resource.rb', line 37

def options
  @options
end

#url ⇒ Object (readonly)

Returns the value of attribute url.



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# File 'lib/http_client/resource.rb', line 37

def url
  @url
end

Instance Method Details

#[](suburl) ⇒ Object

Construct a subresource, preserving authentication.

Example:

site = HttpClient::Resource.new('http://example.com', 'adam', 'mypasswd')
site['posts/1/comments'].post 'Good article.', :content_type => 'text/plain'

This is especially useful if you wish to define your site in one place and call it in multiple locations:

def orders
  HttpClient::Resource.new('http://example.com/orders', 'admin', 'mypasswd')
end

orders.get                     # GET http://example.com/orders
orders['1'].get                # GET http://example.com/orders/1
orders['1/items'].delete       # DELETE http://example.com/orders/1/items

Nest resources as far as you want:

site = HttpClient::Resource.new('http://example.com')
posts = site['posts']
first_post = posts['1']
comments = first_post['comments']
comments.post 'Hello', :content_type => 'text/plain'



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# File 'lib/http_client/resource.rb', line 132

def [](suburl)
  self.class.new(concat_urls(url, suburl), options)
end

#concat_urls(url, suburl) ⇒ Object

:nodoc:



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# File 'lib/http_client/resource.rb', line 136

def concat_urls(url, suburl)   # :nodoc:
  url = url.to_s
  suburl = suburl.to_s
  if url.slice(-1, 1) == '/' or suburl.slice(0, 1) == '/'
    url + suburl
  else
    "#{url}/#{suburl}"
  end
end

#delete(additional_headers = {}) ⇒ Object 



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# File 'lib/http_client/resource.rb', line 74

def delete(additional_headers={})
  Request.execute(options.merge(
    :method => :delete,
    :url => url,
    :headers => headers.merge(additional_headers)
  ))
end

#get(additional_headers = {}) ⇒ Object 



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# File 'lib/http_client/resource.rb', line 48

def get(additional_headers={})
  Request.execute(options.merge(
    :method => :get,
    :url => url,
    :headers => headers.merge(additional_headers)
  ))
end

#headers ⇒ Object 



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# File 'lib/http_client/resource.rb', line 94

def headers
  options[:headers] || {}
end

#open_timeout ⇒ Object 



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# File 'lib/http_client/resource.rb', line 102

def open_timeout
  options[:open_timeout]
end

#password ⇒ Object 



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# File 'lib/http_client/resource.rb', line 90

def password
  options[:password]
end

#post(payload, additional_headers = {}) ⇒ Object 



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# File 'lib/http_client/resource.rb', line 56

def post(payload, additional_headers={})
  Request.execute(options.merge(
    :method => :post,
    :url => url,
    :payload => payload,
    :headers => headers.merge(additional_headers)
  ))
end

#put(payload, additional_headers = {}) ⇒ Object 



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# File 'lib/http_client/resource.rb', line 65

def put(payload, additional_headers={})
  Request.execute(options.merge(
    :method => :put,
    :url => url,
    :payload => payload,
    :headers => headers.merge(additional_headers)
  ))
end

#timeout ⇒ Object 



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# File 'lib/http_client/resource.rb', line 98

def timeout
  options[:timeout]
end

#to_s ⇒ Object 



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# File 'lib/http_client/resource.rb', line 82

def to_s
  url
end

#user ⇒ Object 



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# File 'lib/http_client/resource.rb', line 86

def user
  options[:user]
end