Class: Chef::HTTP

Inherits:
Object
  • Object
show all
Defined in:
lib/chef/http.rb,
lib/chef/http/simple.rb,
lib/chef/http/cookie_jar.rb,
lib/chef/http/json_input.rb,
lib/chef/http/json_output.rb,
lib/chef/http/simple_json.rb,
lib/chef/http/api_versions.rb,
lib/chef/http/basic_client.rb,
lib/chef/http/decompressor.rb,
lib/chef/http/http_request.rb,
lib/chef/http/ssl_policies.rb,
lib/chef/http/authenticator.rb,
lib/chef/http/cookie_manager.rb,
lib/chef/http/auth_credentials.rb,
lib/chef/http/remote_request_id.rb,
lib/chef/http/json_to_model_output.rb,
lib/chef/http/validate_content_length.rb,
lib/chef/http/socketless_chef_zero_client.rb

Overview

Chef::HTTP

Basic HTTP client, with support for adding features via middleware

Defined Under Namespace

Classes: APISSLPolicy, APIVersions, AuthCredentials, Authenticator, BasicClient, CookieJar, CookieManager, Decompressor, DefaultSSLPolicy, HTTPRequest, JSONInput, JSONOutput, JSONToModelOutput, RemoteRequestID, Simple, SimpleJSON, SocketlessChefZeroClient, StreamHandler, ValidateContentLength

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(url, options = {}) ⇒ HTTP

Create a HTTP client object. The supplied url is used as the base for all subsequent requests. For example, when initialized with a base url localhost:4000, a call to get with 'nodes' will make an HTTP GET request to localhost:4000/nodes


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# File 'lib/chef/http.rb', line 87

def initialize(url, options = {})
  @url = url
  @default_headers = options[:headers] || {}
  @sign_on_redirect = true
  @redirects_followed = 0
  @redirect_limit = 10
  @keepalives = options[:keepalives] || false
  @options = options

  @middlewares = []
  self.class.middlewares.each do |middleware_class|
    @middlewares << middleware_class.new(options)
  end
end

Instance Attribute Details

#keepalivesObject (readonly)

Boolean

if we're doing keepalives or not


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# File 'lib/chef/http.rb', line 81

def keepalives
  @keepalives
end

#middlewaresObject (readonly)

Returns the value of attribute middlewares


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# File 'lib/chef/http.rb', line 78

def middlewares
  @middlewares
end

#optionsObject (readonly)

Returns the value of attribute options


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# File 'lib/chef/http.rb', line 76

def options
  @options
end

#redirect_limitObject (readonly)

Returns the value of attribute redirect_limit


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# File 'lib/chef/http.rb', line 74

def redirect_limit
  @redirect_limit
end

#sign_on_redirectObject (readonly)

Returns the value of attribute sign_on_redirect


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# File 'lib/chef/http.rb', line 73

def sign_on_redirect
  @sign_on_redirect
end

#urlObject (readonly)

Returns the value of attribute url


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# File 'lib/chef/http.rb', line 72

def url
  @url
end

Class Method Details

.middlewaresObject


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# File 'lib/chef/http.rb', line 64

def self.middlewares
  @middlewares ||= []
end

.use(middleware_class) ⇒ Object


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# File 'lib/chef/http.rb', line 68

def self.use(middleware_class)
  middlewares << middleware_class
end

Instance Method Details

#delete(path, headers = {}) ⇒ Object

Send an HTTP DELETE request to the path

Parameters

path

path part of the request URL


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# File 'lib/chef/http.rb', line 138

def delete(path, headers = {})
  request(:DELETE, path, headers)
end

#get(path, headers = {}) ⇒ Object

Send an HTTP GET request to the path

Parameters

path

The path to GET


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# File 'lib/chef/http.rb', line 114

def get(path, headers = {})
  request(:GET, path, headers)
end

#head(path, headers = {}) ⇒ Object

Send an HTTP HEAD request to the path

Parameters

path

path part of the request URL


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# File 'lib/chef/http.rb', line 106

def head(path, headers = {})
  request(:HEAD, path, headers)
end

#http_client(base_url = nil) ⇒ Object


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# File 'lib/chef/http.rb', line 267

def http_client(base_url = nil)
  base_url ||= url
  if keepalives && !base_url.nil?
    # only reuse the http_client if we want keepalives and have a base_url
    @http_client ||= {}
    # the per-host per-port cache here gets peristent connections correct when
    # redirecting to different servers
    if base_url.is_a?(String) # sigh, this kind of abuse can't happen with strongly typed languages
      @http_client[base_url] ||= build_http_client(base_url)
    else
      @http_client[base_url.host] ||= {}
      @http_client[base_url.host][base_url.port] ||= build_http_client(base_url)
    end
  else
    build_http_client(base_url)
  end
end

#last_responseObject

DEPRECATED: This is only kept around to provide access to cache control data in lib/chef/provider/remote_file/http.rb FIXME: Find a better API.


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# File 'lib/chef/http.rb', line 288

def last_response
  @last_response
end

#post(path, json, headers = {}) ⇒ Object

Send an HTTP POST request to the path

Parameters

path

path part of the request URL


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# File 'lib/chef/http.rb', line 130

def post(path, json, headers = {})
  request(:POST, path, headers, json)
end

#put(path, json, headers = {}) ⇒ Object

Send an HTTP PUT request to the path

Parameters

path

path part of the request URL


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# File 'lib/chef/http.rb', line 122

def put(path, json, headers = {})
  request(:PUT, path, headers, json)
end

#request(method, path, headers = {}, data = false) ⇒ Object

Makes an HTTP request to path with the given method, headers, and data (if applicable).


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# File 'lib/chef/http.rb', line 144

def request(method, path, headers = {}, data = false)
  http_attempts ||= 0
  url = create_url(path)
  processed_method, url, processed_headers, processed_data = apply_request_middleware(method, url, headers, data)

  response, rest_request, return_value = send_http_request(processed_method, url, processed_headers, processed_data)
  response, rest_request, return_value = apply_response_middleware(response, rest_request, return_value)

  response.error! unless success_response?(response)
  return_value

rescue Net::HTTPClientException => e
  http_attempts += 1
  response = e.response
  if response.is_a?(Net::HTTPNotAcceptable) && version_retries - http_attempts > 0
    Chef::Log.trace("Negotiating protocol version with #{url}, retry #{http_attempts}/#{version_retries}")
    retry
  else
    raise
  end
rescue Exception => exception
  log_failed_request(response, return_value) unless response.nil?

  if exception.respond_to?(:chef_rest_request=)
    exception.chef_rest_request = rest_request
  end
  raise
end

#streaming_request(path, headers = {}, tempfile = nil) {|tempfile| ... } ⇒ Object

Makes a streaming download request, streaming the response body to a tempfile. If a block is given, the tempfile is passed to the block and the tempfile will automatically be unlinked after the block is executed.

If no block is given, the tempfile is returned, which means it's up to you to unlink the tempfile when you're done with it.

Yields:

  • (tempfile)

    block to process the tempfile

Yield Parameters:

  • tempfile (tempfile<Tempfile>)

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# File 'lib/chef/http.rb', line 220

def streaming_request(path, headers = {}, tempfile = nil)
  http_attempts ||= 0
  url = create_url(path)
  response, rest_request, return_value = nil, nil, nil
  data = nil

  method = :GET
  method, url, processed_headers, data = apply_request_middleware(method, url, headers, data)

  response, rest_request, return_value = send_http_request(method, url, processed_headers, data) do |http_response|
    if http_response.is_a?(Net::HTTPSuccess)
      tempfile = stream_to_tempfile(url, http_response, tempfile)
    end
    apply_stream_complete_middleware(http_response, rest_request, return_value)
  end

  return nil if response.is_a?(Net::HTTPRedirection)

  unless response.is_a?(Net::HTTPSuccess)
    response.error!
  end

  if block_given?
    begin
      yield tempfile
    ensure
      tempfile && tempfile.close!
    end
  end
  tempfile
rescue Net::HTTPClientException => e
  http_attempts += 1
  response = e.response
  if response.is_a?(Net::HTTPNotAcceptable) && version_retries - http_attempts > 0
    Chef::Log.trace("Negotiating protocol version with #{url}, retry #{http_attempts}/#{version_retries}")
    retry
  else
    raise
  end
rescue Exception => e
  log_failed_request(response, return_value) unless response.nil?
  if e.respond_to?(:chef_rest_request=)
    e.chef_rest_request = rest_request
  end
  raise
end

#streaming_request_with_progress(path, headers = {}, tempfile = nil, &progress_block) ⇒ Object


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# File 'lib/chef/http.rb', line 173

def streaming_request_with_progress(path, headers = {}, tempfile = nil, &progress_block)
  http_attempts ||= 0
  url = create_url(path)
  response, rest_request, return_value = nil, nil, nil
  data = nil

  method = :GET
  method, url, processed_headers, data = apply_request_middleware(method, url, headers, data)

  response, rest_request, return_value = send_http_request(method, url, processed_headers, data) do |http_response|
    if http_response.is_a?(Net::HTTPSuccess)
      tempfile = stream_to_tempfile(url, http_response, tempfile, &progress_block)
    end
    apply_stream_complete_middleware(http_response, rest_request, return_value)
  end
  return nil if response.is_a?(Net::HTTPRedirection)

  unless response.is_a?(Net::HTTPSuccess)
    response.error!
  end
  tempfile
rescue Net::HTTPClientException => e
  http_attempts += 1
  response = e.response
  if response.is_a?(Net::HTTPNotAcceptable) && version_retries - http_attempts > 0
    Chef::Log.trace("Negotiating protocol version with #{url}, retry #{http_attempts}/#{version_retries}")
    retry
  else
    raise
  end
rescue Exception => e
  log_failed_request(response, return_value) unless response.nil?
  if e.respond_to?(:chef_rest_request=)
    e.chef_rest_request = rest_request
  end
  raise
end