Class: Arrest::HttpSource

Inherits:
Object
  • Object
show all
Defined in:
lib/arrest/http_source.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(base) ⇒ HttpSource

Returns a new instance of HttpSource.



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# File 'lib/arrest/http_source.rb', line 10

def initialize base
  @base = base
end

Instance Attribute Details

#base ⇒ Object (readonly)

Returns the value of attribute base.



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# File 'lib/arrest/http_source.rb', line 8

def base
  @base
end

Instance Method Details

#add_headers(context, headers) ⇒ Object 



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# File 'lib/arrest/http_source.rb', line 18

def add_headers(context,headers)
  decorator = context.header_decorator if context
  decorator ||= Arrest::Source.header_decorator
  hds = decorator.headers
  hds.each_pair do |k,v|
    headers[k.to_s] = v.to_s
  end
  hds
end

#connection ⇒ Object 



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# File 'lib/arrest/http_source.rb', line 166

def connection
  conn = Faraday.new(:url => @base) do |builder|
    builder.request  :url_encoded
    builder.request  :json
    builder.adapter  :net_http
    builder.use Faraday::Response::Logger, Arrest::logger
  end
end

#delete(context, rest_resource) ⇒ Object 



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# File 'lib/arrest/http_source.rb', line 73

def delete(context, rest_resource)
  raise "To delete an object it must have an id" unless rest_resource.respond_to?(:id) && rest_resource.id != nil
  headers = nil
  response = self.connection().delete do |req|
    req.url(rest_resource.resource_location)
    headers = add_headers(context, req.headers)
  end
  rql = RequestLog.new(:delete, rest_resource.resource_location, nil, headers)
  rsl = ResponseLog.new(response.env[:status], response.body)
  Arrest::Source.call_logger.log(rql, rsl)
  if response.env[:status] != 200
    handle_errors(rest_resource, response.body, response.env[:status])
  end
  response.env[:status] == 200
end

#delete_all(context, resource_path) ⇒ Object 



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# File 'lib/arrest/http_source.rb', line 60

def delete_all(context, resource_path)
  headers = nil
  response = self.connection().delete do |req|
    req.url(resource_path)
    headers = add_headers(context, req.headers)
  end
  rql = RequestLog.new(:delete, "#{resource_path}", nil, headers)
  rsl = ResponseLog.new(response.env[:status], response.body)
  Arrest::Source.call_logger.log(rql, rsl)

  response.env[:status] == 200
end

#get_many(context, sub, filter = {}) ⇒ Object 



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# File 'lib/arrest/http_source.rb', line 47

def get_many(context, sub, filter={})
  headers = nil
  response = self.connection().get do |req|
    req.url(sub, filter)
    headers = add_headers(context, req.headers)
  end
  rql = RequestLog.new(:get, "#{sub}#{hash_to_query filter}", nil, headers)
  rsl = ResponseLog.new(response.env[:status], response.body)
  Arrest::Source.call_logger.log(rql, rsl)
  response.body
end

#get_many_other_ids(context, path) ⇒ Object 



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# File 'lib/arrest/http_source.rb', line 43

def get_many_other_ids(context, path)
  get_one(context, path)
end

#get_one(context, sub, filter = {}) ⇒ Object 



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# File 'lib/arrest/http_source.rb', line 28

def get_one(context, sub, filter={})
  headers = nil
  response = self.connection().get do |req|
    req.url(sub, filter)
    headers = add_headers(context, req.headers)
  end
  rql = RequestLog.new(:get, "#{sub}#{hash_to_query filter}", nil, headers)
  rsl = ResponseLog.new(response.env[:status], response.body)
  Arrest::Source.call_logger.log(rql, rsl)
  if response.env[:status] != 200
    raise Errors::DocumentNotFoundError
  end
  response.body
end

#hash_to_query(hash) ⇒ Object 



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# File 'lib/arrest/http_source.rb', line 175

def hash_to_query hash
  return "" if hash.empty?
  r = ""
  c = '?'
  hash.each_pair do |k,v|
    r << c
    r << k.to_s
    r << '='
    r << v.to_s
    c = '&'
  end
  r
end

#insert_nulls!(rest_resource, hash) ⇒ Object 



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# File 'lib/arrest/http_source.rb', line 126

def insert_nulls!(rest_resource, hash)
  rest_resource.class.all_fields.each do |field|
    changed = (!rest_resource.respond_to?("#{field.name}_changed?" || rest_resource.send("#{field}_changed?")))
    if !field.read_only && hash[field.json_name] == nil && changed
      hash[field.json_name] = Null.singleton
    end
  end
end

#internal_put(rest_resource, location, body) ⇒ Object 



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# File 'lib/arrest/http_source.rb', line 110

def internal_put(rest_resource, location, body)
  headers = nil
  response = self.connection().put do |req|
    req.url(location)
    headers = add_headers(rest_resource.context, req.headers)
    req.body = body
  end
  rql = RequestLog.new(:put, location, body, headers)
  rsl = ResponseLog.new(response.env[:status], response.body)
  Arrest::Source.call_logger.log(rql, rsl)
  if response.env[:status] != 200
    handle_errors(rest_resource, response.body, response.env[:status])
  end
  response.env[:status] == 200
end

#post(context, rest_resource) ⇒ Object 



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# File 'lib/arrest/http_source.rb', line 135

def post(context, rest_resource)
  raise "new object must have setter for id" unless rest_resource.respond_to?(:id=)
  raise "new object must not have id" if rest_resource.respond_to?(:id) && rest_resource.id != nil
  hash = rest_resource.to_jhash
  hash.delete(:id)
  hash.delete('id')

  insert_nulls!(rest_resource,hash)

  body = JSON.generate(hash)
  headers = nil
  response = self.connection().post do |req|
    req.url rest_resource.resource_path
    headers = add_headers(context, req.headers)
    req.body = body
  end
  rql = RequestLog.new(:post, rest_resource.resource_path, body, headers)
  rsl = ResponseLog.new(response.env[:status], response.body)
  Arrest::Source.call_logger.log(rql, rsl)
  if (response.env[:status] == 201)
    location = response.env[:response_headers][:location]
    id = location.gsub(/^.*\//, '')
    rest_resource.id= id
    true
  else
    handle_errors(rest_resource, response.body, response.env[:status])
    false
  end

end

#put(context, rest_resource) ⇒ Object 



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# File 'lib/arrest/http_source.rb', line 96

def put(context, rest_resource)
  raise "To change an object it must have an id" unless rest_resource.respond_to?(:id) && rest_resource.id != nil
  hash = rest_resource.to_jhash
  insert_nulls!(rest_resource,hash)
  hash.delete(:id)
  hash.delete("id")
  body = JSON.generate(hash)

  internal_put(rest_resource, rest_resource.resource_location, body)
end

#put_sub_resource(rest_resource, sub_url, ids) ⇒ Object 



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# File 'lib/arrest/http_source.rb', line 89

def put_sub_resource(rest_resource, sub_url, ids)
  location = "#{rest_resource.resource_location}/#{sub_url}"
  body = ids.to_json

  internal_put(rest_resource, location, body)
end

#url ⇒ Object 



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# File 'lib/arrest/http_source.rb', line 14

def url
  @base
end