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request.rb
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request.rb
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require "cgi"
require "multi_json"
require 'crack'
require 'crack/xml'
module Flexirest
class Request
include AttributeParsing
include JsonAPIProxy
include ActiveSupport::Inflector
attr_accessor :post_params, :get_params, :url, :path, :headers, :method, :object, :body, :forced_url, :original_url, :retrying
def initialize(method, object, params = {})
@method = method
@method[:options] ||= {}
@method[:options][:lazy] ||= []
@method[:options][:array] ||= []
@method[:options][:has_one] ||= {}
@overridden_name = @method[:options][:overridden_name]
@object = object
@response_delegate = Flexirest::RequestDelegator.new(nil)
@params = params
@headers = HeadersList.new
(@method[:options][:headers] || {}).each do |k,v|
@headers[k] = v
end
@forced_url = nil
end
def object_is_class?
!@object.respond_to?(:dirty?)
end
def class_name
if object_is_class?
@object.name
else
@object.class.name
end
end
def original_object_class
if object_is_class?
@object
else
@object.class
end
end
def base_url
if object_is_class?
url = @object.base_url
else
url = @object.class.base_url
end
if url.is_a?(Array)
url = url.sample
end
url
end
def using_api_auth?
if object_is_class?
@object.using_api_auth?
else
@object.class.using_api_auth?
end
end
def api_auth_access_id
if object_is_class?
@object.api_auth_access_id
else
@object.class.api_auth_access_id
end
end
def api_auth_secret_key
if object_is_class?
@object.api_auth_secret_key
else
@object.class.api_auth_secret_key
end
end
def api_auth_options
if object_is_class?
@object.api_auth_options
else
@object.class.api_auth_options
end
end
def username
ret = nil
if object_is_class?
ret = @object.username
ret = ret.call if ret.respond_to?(:call)
else
ret = @object.class.username
ret = ret.call(@object) if ret.respond_to?(:call)
end
ret
end
def password
ret = nil
if object_is_class?
ret = @object.password
ret = ret.call if ret.respond_to?(:call)
else
ret = @object.class.password
ret = ret.call(@object) if ret.respond_to?(:call)
end
ret
end
def request_body_type
if @method[:options][:request_body_type]
@method[:options][:request_body_type]
elsif @object.nil?
nil
elsif object_is_class?
@object.request_body_type
else
@object.class.request_body_type
end
end
def verbose?
if object_is_class?
@object.verbose
else
@object.class.verbose
end
end
def translator
if object_is_class?
@object.translator
else
@object.class.translator
end
end
def proxy
if object_is_class?
@object.proxy
else
@object.class.proxy
end
rescue
nil
end
def http_method
@method[:method]
end
def get?
http_method == :get
end
def post?
http_method == :post
end
def put?
http_method == :put
end
def delete?
http_method == :delete
end
def call(explicit_parameters=nil)
@instrumentation_name = "#{class_name}##{@method[:name]}"
result = nil
cached = nil
ActiveSupport::Notifications.instrument("request_call.flexirest", :name => @instrumentation_name) do
@explicit_parameters = explicit_parameters
@body = nil
prepare_params
prepare_url
if fake = @method[:options][:fake]
if fake.respond_to?(:call)
fake = fake.call(self)
end
Flexirest::Logger.debug " \033[1;4;32m#{Flexirest.name}\033[0m #{@instrumentation_name} - Faked response found"
content_type = @method[:options][:fake_content_type] || "application/json"
return handle_response(OpenStruct.new(status:200, body:fake, response_headers:{"X-ARC-Faked-Response" => "true", "Content-Type" => content_type}))
end
if object_is_class?
callback_result = @object.send(:_callback_request, :before, @method[:name], self)
else
callback_result = @object.class.send(:_callback_request, :before, @method[:name], self)
end
if callback_result == false
return false
end
append_get_parameters
prepare_request_body
self.original_url = self.url
cached = original_object_class.read_cached_response(self)
if cached && !cached.is_a?(String)
if cached.expires && cached.expires > Time.now
Flexirest::Logger.debug " \033[1;4;32m#{Flexirest.name}\033[0m #{@instrumentation_name} - Absolutely cached copy found"
return handle_cached_response(cached)
elsif cached.etag.to_s != "" #present? isn't working for some reason
Flexirest::Logger.debug " \033[1;4;32m#{Flexirest.name}\033[0m #{@instrumentation_name} - Etag cached copy found with etag #{cached.etag}"
etag = cached.etag
end
end
response = (
if proxy && proxy.is_a?(Class)
proxy.handle(self) do |request|
request.do_request(etag)
end
else
do_request(etag)
end
)
# This block is called immediately when this request is not inside a parallel request block.
# Otherwise this callback is called after the parallel request block ends.
response.on_complete do |response_env|
if verbose?
Flexirest::Logger.debug " Response"
Flexirest::Logger.debug " << Status : #{response_env.status}"
response_env.response_headers.each do |k,v|
Flexirest::Logger.debug " << #{k} : #{v}"
end
Flexirest::Logger.debug " << Body:\n#{response_env.body}"
end
if object_is_class? && @object.record_response?
@object.record_response(self.url, response_env)
end
begin
if object_is_class?
callback_result = @object.send(:_callback_request, :after, @method[:name], response_env)
else
callback_result = @object.class.send(:_callback_request, :after, @method[:name], response_env)
end
rescue Flexirest::CallbackRetryRequestException
if self.retrying != true
self.retrying = true
return call()
end
end
result = handle_response(response_env, cached)
@response_delegate.__setobj__(result)
original_object_class.write_cached_response(self, response_env, result)
end
# If this was not a parallel request just return the original result
return result if response.finished?
# Otherwise return the delegate which will get set later once the call back is completed
return @response_delegate
end
end
def prepare_params
if http_method == :post || http_method == :put || http_method == :patch
params = (@object._attributes rescue {}).merge(@params || {}) rescue {}
else
params = @params || @object._attributes rescue {}
end
if params.is_a?(String) || params.is_a?(Integer)
params = {id:params}
end
# Format includes parameter for jsonapi
if proxy == :json_api
JsonAPIProxy::Request::Params.translate(params, @object._include_associations)
@object._reset_include_associations!
end
if @method[:options][:defaults].respond_to?(:call)
default_params = @method[:options][:defaults].call(params)
else
default_params = @method[:options][:defaults] || {}
end
if @explicit_parameters
params = @explicit_parameters
end
if http_method == :get
@get_params = default_params.merge(params || {})
@post_params = nil
elsif http_method == :delete && @method[:options][:send_delete_body]
@post_params = default_params.merge(params || {})
@get_params = {}
elsif params.is_a? String
@post_params = params
@get_params = {}
else
@post_params = (default_params || {}).merge(params || {})
@get_params = {}
end
# Evaluate :only_changed
if @method[:options][:only_changed]
if http_method == :post or http_method == :put or http_method == :patch
# we only ever mess with @post_params in here, because @get_params will/should never match our method criteria
if @method[:options][:only_changed].is_a? Hash
# only include the listed attributes marked 'true' when they are changed; attributed marked false are always included
newPostHash = {}
@method[:options][:only_changed].each_pair do |changed_attr_k,changed_attr_v|
if changed_attr_v == false or @object.changes.has_key? changed_attr_k.to_sym
newPostHash[changed_attr_k.to_sym] = @object[changed_attr_k.to_sym]
end
end
@post_params = newPostHash
elsif @method[:options][:only_changed].is_a? Array
# only send these listed attributes, and only if they are changed
newPostHash = {}
@method[:options][:only_changed].each do |changed_attr|
if @object.changes.has_key? changed_attr.to_sym
newPostHash[changed_attr.to_sym] = @object[changed_attr.to_sym]
end
end
@post_params = newPostHash
else
# only send attributes if they are changed, drop the rest
newPostHash = {}
@object.changed.each do |k|
newPostHash[k] = @object[k]
end
@post_params = newPostHash
end
end
end
if @method[:options][:requires]
requires = @method[:options][:requires].dup
merged_params = @get_params.merge(@post_params || {})
missing = []
requires.each do |key|
if merged_params[key.to_sym].blank? && ![true, false].include?(merged_params[key.to_sym])
missing << key
end
end
if missing.any?
raise Flexirest::MissingParametersException.new("The following parameters weren't specifed: #{missing.join(", ")}")
end
end
end
def prepare_url
if @forced_url && @forced_url.present?
@url = @forced_url
else
@url = @method[:url].dup
matches = @url.scan(/(:[a-z_-]+)/)
@get_params ||= {}
@post_params ||= {}
matches.each do |token|
token = token.first[1,999]
# pull URL path variables out of @get_params/@post_params
target = @get_params.delete(token.to_sym) || @post_params.delete(token.to_sym) || @get_params.delete(token.to_s) || @post_params.delete(token.to_s) || ""
unless object_is_class?
# it's possible the URL path variable may not be part of the request, in that case, try to resolve it from the object attributes
target = @object._attributes[token.to_sym] || "" if target == ""
end
@url.gsub!(":#{token}", URI.escape(target.to_s).gsub("/", "%2F").gsub("+", "%2B"))
end
end
end
def append_get_parameters
if @get_params.any?
if @method[:options][:params_encoder] == :flat
@url += "?" + URI.encode_www_form(@get_params)
else
@url += "?" + @get_params.to_query
end
end
end
def prepare_request_body(params = nil)
if proxy == :json_api
if http_method == :get || (http_method == :delete && !@method[:options][:send_delete_body])
@body = ""
else
headers["Content-Type"] ||= "application/vnd.api+json"
@body = JsonAPIProxy::Request::Params.create(
params || @post_params || {},
object_is_class? ? @object.new : @object
).to_json
end
headers["Accept"] ||= "application/vnd.api+json"
JsonAPIProxy::Headers.save(headers)
elsif http_method == :get || (http_method == :delete && !@method[:options][:send_delete_body])
if request_body_type == :form_encoded
headers["Content-Type"] ||= "application/x-www-form-urlencoded; charset=utf-8"
elsif request_body_type == :json
headers["Content-Type"] ||= "application/json; charset=utf-8"
end
@body = ""
elsif request_body_type == :form_encoded
@body ||= if params.is_a?(String)
params
elsif @post_params.is_a?(String)
@post_params
else
p = (params || @post_params || {})
if @method[:options][:wrap_root].present?
p = {@method[:options][:wrap_root] => p}
end
p.to_query
end
headers["Content-Type"] ||= "application/x-www-form-urlencoded"
elsif request_body_type == :json
@body ||= if params.is_a?(String)
params
elsif @post_params.is_a?(String)
@post_params
else
if @method[:options][:wrap_root].present?
{@method[:options][:wrap_root] => (params || @post_params || {})}.to_json
else
(params || @post_params || {}).to_json
end
end
headers["Content-Type"] ||= "application/json; charset=utf-8"
elsif request_body_type == :plain && @post_params[:body].present?
@body = @post_params[:body]
headers["Content-Type"] ||= "text/plain"
headers["Content-Type"] = @post_params[:content_type] if @post_params[:content_type].present?
end
end
def do_request(etag)
http_headers = {}
http_headers["If-None-Match"] = etag if etag
http_headers["Accept"] = "application/hal+json, application/json;q=0.5"
headers.each do |key,value|
value = value.join(",") if value.is_a?(Array)
http_headers[key] = value
end
if @method[:options][:url] || @forced_url
@url = @method[:options][:url] || @method[:url]
@url = @forced_url if @forced_url
if connection = Flexirest::ConnectionManager.find_connection_for_url(@url)
@url = @url.slice(connection.base_url.length, 255)
else
parts = @url.match(%r{^(https?://[a-z\d\.:-]+?)(/.*)}).to_a
if (parts.empty?) # Not a full URL, so use hostname/protocol from existing base_url
uri = URI.parse(base_url)
@base_url = "#{uri.scheme}://#{uri.host}#{":#{uri.port}" if uri.port != 80 && uri.port != 443}"
@url = "#{base_url}#{@url}".gsub(@base_url, "")
else
_, @base_url, @url = parts
end
base_url.gsub!(%r{//(.)}, "//#{username}:#{password}@\\1") if username && !base_url[%r{//[^/]*:[^/]*@}]
connection = Flexirest::ConnectionManager.get_connection(base_url)
end
else
parts = @url.match(%r{^(https?://[a-z\d\.:-]+?)(/.*)?$}).to_a
if (parts.empty?) # Not a full URL, so use hostname/protocol from existing base_url
uri = URI.parse(base_url)
@base_url = "#{uri.scheme}://#{uri.host}#{":#{uri.port}" if uri.port != 80 && uri.port != 443}"
@url = "#{base_url}#{@url}".gsub(@base_url, "")
base_url = @base_url
else
base_url = parts[0]
end
base_url.gsub!(%r{//(.)}, "//#{username}:#{password}@\\1") if username && !base_url[%r{//[^/]*:[^/]*@}]
connection = Flexirest::ConnectionManager.get_connection(base_url)
end
if @method[:options][:direct]
Flexirest::Logger.info " \033[1;4;32m#{Flexirest.name}\033[0m #{@instrumentation_name} - Requesting #{@url}"
else
Flexirest::Logger.info " \033[1;4;32m#{Flexirest.name}\033[0m #{@instrumentation_name} - Requesting #{connection.base_url}#{@url}"
end
if verbose?
Flexirest::Logger.debug "Flexirest Verbose Log:"
Flexirest::Logger.debug " Request"
Flexirest::Logger.debug " >> #{http_method.upcase} #{@url} HTTP/1.1"
http_headers.each do |k,v|
Flexirest::Logger.debug " >> #{k} : #{v}"
end
Flexirest::Logger.debug " >> Body:\n#{@body}"
end
request_options = {:headers => http_headers}
if using_api_auth?
request_options[:api_auth] = {
:api_auth_access_id => api_auth_access_id,
:api_auth_secret_key => api_auth_secret_key,
:api_auth_options => api_auth_options
}
end
if @method[:options][:timeout]
request_options[:timeout] = @method[:options][:timeout]
end
case http_method
when :get
response = connection.get(@url, request_options)
when :put
response = connection.put(@url, @body, request_options)
when :post
response = connection.post(@url, @body, request_options)
when :patch
response = connection.patch(@url, @body, request_options)
when :delete
response = connection.delete(@url, @body, request_options)
else
raise InvalidRequestException.new("Invalid method #{http_method}")
end
response
end
def handle_cached_response(cached)
if cached.result.is_a? Flexirest::ResultIterator
cached.result
else
if object_is_class?
cached.result
else
@object._copy_from(cached.result)
@object
end
end
end
def handle_response(response, cached = nil)
@response = response
status = @response.status || 200
if @response.body.blank?
@response.response_headers['Content-Type'] = "application/json"
@response.body = "{}"
end
if cached && response.status == 304
Flexirest::Logger.debug " \033[1;4;32m#{Flexirest.name}\033[0m #{@instrumentation_name}" +
' - Etag copy is the same as the server'
return handle_cached_response(cached)
end
if (200..399).include?(status)
if @method[:options][:plain]
return @response = Flexirest::PlainResponse.from_response(@response)
elsif is_json_response? || is_xml_response?
if @response.respond_to?(:proxied) && @response.proxied
Flexirest::Logger.debug " \033[1;4;32m#{Flexirest.name}\033[0m #{@instrumentation_name} - Response was proxied, unable to determine size"
else
Flexirest::Logger.debug " \033[1;4;32m#{Flexirest.name}\033[0m #{@instrumentation_name} - Response received #{@response.body.size} bytes"
end
result = generate_new_object(ignore_root: @method[:options][:ignore_root], ignore_xml_root: @method[:options][:ignore_xml_root])
# TODO: Cleanup when ignore_xml_root is removed
else
raise ResponseParseException.new(status:status, body:@response.body, headers: @response.headers)
end
else
if is_json_response? || is_xml_response?
error_response = generate_new_object(mutable: false, ignore_xml_root: @method[:options][:ignore_xml_root])
else
error_response = @response.body
end
if status == 400
raise HTTPBadRequestClientException.new(status:status, result:error_response, raw_response: @response.body, url:@url, method: http_method)
elsif status == 401
raise HTTPUnauthorisedClientException.new(status:status, result:error_response, raw_response: @response.body, url:@url, method: http_method)
elsif status == 403
raise HTTPForbiddenClientException.new(status:status, result:error_response, raw_response: @response.body, url:@url, method: http_method)
elsif status == 404
raise HTTPNotFoundClientException.new(status:status, result:error_response, raw_response: @response.body, url:@url, method: http_method)
elsif status == 405
raise HTTPMethodNotAllowedClientException.new(status:status, result:error_response, raw_response: @response.body, url:@url, method: http_method)
elsif status == 406
raise HTTPNotAcceptableClientException.new(status:status, result:error_response, raw_response: @response.body, url:@url, method: http_method)
elsif status == 408
raise HTTPTimeoutClientException.new(status:status, result:error_response, raw_response: @response.body, url:@url, method: http_method)
elsif status == 409
raise HTTPConflictClientException.new(status:status, result:error_response, raw_response: @response.body, url:@url, method: http_method)
elsif status == 409
raise HTTPTooManyRequestsClientException.new(status:status, result:error_response, raw_response: @response.body, url:@url, method: http_method)
elsif (400..499).include? status
raise HTTPClientException.new(status:status, result:error_response, raw_response: @response.body, url:@url, method: http_method)
elsif (500..599).include? status
raise HTTPServerException.new(status:status, result:error_response, raw_response: @response.body, url:@url, method: http_method)
elsif status == 0
raise TimeoutException.new("Timed out getting #{response.url}")
end
end
result
end
def new_object(attributes, name = nil)
@method[:options][:has_many] ||= {}
name = name.to_sym rescue nil
if @method[:options][:has_many][name]
overridden_name = name
object = @method[:options][:has_many][name].new
elsif @method[:options][:has_one][name]
overridden_name = name
object = @method[:options][:has_one][name].new
else
object = create_object_instance
end
if hal_response? && name.nil?
attributes = handle_hal_links_embedded(object, attributes)
end
attributes.each do |k,v|
if @method[:options][:rubify_names]
k = rubify_name(k)
else
k = k.to_sym
end
overridden_name = select_name(k, overridden_name)
if @method[:options][:lazy].include?(k)
object._attributes[k] = Flexirest::LazyAssociationLoader.new(overridden_name, v, self, overridden_name:(overridden_name))
elsif v.is_a? Hash
object._attributes[k] = new_object(v, overridden_name )
elsif v.is_a? Array
if @method[:options][:array].include?(k)
object._attributes[k] = Array.new
else
object._attributes[k] = Flexirest::ResultIterator.new
end
v.each do |item|
if item.is_a? Hash
object._attributes[k] << new_object(item, overridden_name)
else
object._attributes[k] << item
end
end
else
parse_fields = [ @method[:options][:parse_fields], @object._date_fields ].compact.reduce([], :|)
parse_fields = nil if parse_fields.empty?
if (parse_fields && parse_fields.include?(k))
object._attributes[k] = parse_attribute_value(v)
elsif parse_fields
object._attributes[k] = v
elsif Flexirest::Base.disable_automatic_date_parsing
object._attributes[k] = v
else
object._attributes[k] = parse_attribute_value(v)
end
end
end
object.clean! unless object_is_class?
object
end
def hal_response?
_, content_type = @response.response_headers.detect{|k,v| k.downcase == "content-type"}
faked_response = @response.response_headers.detect{|k,v| k.downcase == "x-arc-faked-response"}
if content_type && content_type.respond_to?(:each)
content_type.each do |ct|
return true if ct[%r{application\/hal\+json}i]
return true if ct[%r{application\/json}i]
end
faked_response
elsif content_type && (content_type[%r{application\/hal\+json}i] || content_type[%r{application\/json}i]) || faked_response
true
else
false
end
end
def handle_hal_links_embedded(object, attributes)
attributes["_links"] = attributes[:_links] if attributes[:_links]
attributes["_embedded"] = attributes[:_embedded] if attributes[:_embedded]
if attributes["_links"]
attributes["_links"].each do |key, value|
if value.is_a?(Array)
object._attributes[key.to_sym] ||= Flexirest::ResultIterator.new
value.each do |element|
begin
embedded_version = attributes["_embedded"][key].detect{|embed| embed["_links"]["self"]["href"] == element["href"]}
object._attributes[key.to_sym] << new_object(embedded_version, key)
rescue NoMethodError
object._attributes[key.to_sym] << Flexirest::LazyAssociationLoader.new(key, element, self)
end
end
else
begin
embedded_version = attributes["_embedded"][key]
object._attributes[key.to_sym] = new_object(embedded_version, key)
rescue NoMethodError
object._attributes[key.to_sym] = Flexirest::LazyAssociationLoader.new(key, value, self)
end
end
end
attributes.delete("_links")
attributes.delete("_embedded")
end
attributes
end
private
def create_object_instance
return object_is_class? ? @object.new : @object.class.new
end
def select_name(name, parent_name)
if @method[:options][:has_many][name] || @method[:options][:has_one][name]
return name
end
parent_name || name
end
def is_json_response?
@response.response_headers['Content-Type'].nil? || @response.response_headers['Content-Type'].include?('json')
end
def is_json_api_response?
@response.response_headers['Content-Type'] && @response.response_headers['Content-Type'].include?('application/vnd.api+json')
end
def is_xml_response?
@response.response_headers['Content-Type'].include?('xml')
end
def generate_new_object(options={})
if @response.body.is_a?(Array) || @response.body.is_a?(Hash)
body = @response.body
elsif is_json_response?
begin
body = @response.body.blank? ? {} : MultiJson.load(@response.body)
body = {} if body.nil?
rescue MultiJson::ParseError
raise ResponseParseException.new(status:@response.status, body:@response.body, headers:@response.headers)
end
if is_json_api_response?
body = JsonAPIProxy::Response.parse(body, @object)
end
if options[:ignore_root]
[options[:ignore_root]].flatten.each do |key|
body = body[key.to_s]
end
end
elsif is_xml_response?
body = @response.body.blank? ? {} : Crack::XML.parse(@response.body)
if options[:ignore_root]
[options[:ignore_root]].flatten.each do |key|
body = body[key.to_s]
end
elsif options[:ignore_xml_root]
Flexirest::Logger.warn("Using `ignore_xml_root` is deprecated, please switch to `ignore_root`")
body = body[options[:ignore_xml_root].to_s]
end
end
if translator
body = begin
@method[:name].nil? ? body : translator.send(@method[:name], body)
rescue NoMethodError
body
end
end
if body.is_a? Array
result = Flexirest::ResultIterator.new(@response)
add_nested_body_to_iterator(result, body)
else
result = new_object(body, @overridden_name)
result._status = @response.status
result._headers = @response.response_headers
result._etag = @response.response_headers['ETag']
if !object_is_class? && options[:mutable] != false
@object._copy_from(result)
@object._clean!
result = @object
end
end
result
end
def add_nested_body_to_iterator(result, items)
items.each do |json_object|
if json_object.is_a?(Array)
iterator = ResultIterator.new
add_nested_body_to_iterator(iterator, json_object)
result << iterator
else
result << new_object(json_object, @overridden_name)
end
end
end
def rubify_name(k)
k.underscore.to_sym
end
end
class RequestException < StandardError ; end
class InvalidRequestException < RequestException ; end
class MissingParametersException < RequestException ; end
class ResponseParseException < RequestException
attr_accessor :status, :body, :headers
def initialize(options)
@status = options[:status]
@body = options[:body]
@headers = options[:headers]
end
end
class HTTPException < RequestException
attr_accessor :status, :result, :request_url
def initialize(options)
@status = options[:status]
@result = options[:result]
@request_url = options[:url]
@raw_response = options[:raw_response]
@method = options[:method]
end
def message
method = @method.try(:upcase)
"The #{method} to '#{@request_url}' returned a #{@status} status, which raised a #{self.class.to_s} with a body of: #{@raw_response}"
end
def to_s
message
end
end
class HTTPClientException < HTTPException ; end
class HTTPUnauthorisedClientException < HTTPClientException ; end
class HTTPBadRequestClientException < HTTPClientException ; end
class HTTPForbiddenClientException < HTTPClientException ; end
class HTTPMethodNotAllowedClientException < HTTPClientException ; end
class HTTPNotAcceptableClientException < HTTPClientException ; end
class HTTPTimeoutClientException < HTTPClientException ; end
class HTTPConflictClientException < HTTPClientException ; end
class HTTPNotFoundClientException < HTTPClientException ; end
class HTTPTooManyRequestsClientException < HTTPClientException ; end
class HTTPServerException < HTTPException ; end
end