Class: Peddler::API

Inherits:
Object
  • Object
show all
Defined in:
lib/peddler/api.rb

Overview

Wraps an Amazon Selling Partner API (SP-API)

Direct Known Subclasses

Peddler::APIs::AmazonWarehousingAndDistribution20240509, Peddler::APIs::AplusContent20201101, Peddler::APIs::ApplicationIntegrations20240401, Peddler::APIs::ApplicationManagement20231130, Peddler::APIs::CatalogItems20201201, Peddler::APIs::CatalogItems20220401, Peddler::APIs::CatalogItemsV0, Peddler::APIs::CustomerFeedback20240601, Peddler::APIs::DataKiosk20231115, Peddler::APIs::DeliveryByAmazon20220701, Peddler::APIs::EasyShip20220323, Peddler::APIs::ExternalFulfillmentInventory20240911, Peddler::APIs::ExternalFulfillmentReturns20240911, Peddler::APIs::ExternalFulfillmentShipments20240911, Peddler::APIs::FBAInboundEligibilityV1, Peddler::APIs::FBAInventoryV1, Peddler::APIs::Feeds20210630, Peddler::APIs::Finances20240619, Peddler::APIs::FinancesV0, Peddler::APIs::FulfillmentInbound20240320, Peddler::APIs::FulfillmentInboundV0, Peddler::APIs::FulfillmentOutbound20200701, Peddler::APIs::Invoices20240619, Peddler::APIs::ListingsItems20200901, Peddler::APIs::ListingsItems20210801, Peddler::APIs::ListingsRestrictions20210801, Peddler::APIs::MerchantFulfillmentV0, Peddler::APIs::MessagingV1, Peddler::APIs::NotificationsV1, Peddler::APIs::Orders20260101, Peddler::APIs::OrdersV0, Peddler::APIs::ProductFeesV0, Peddler::APIs::ProductPricing20220501, Peddler::APIs::ProductPricingV0, Peddler::APIs::ProductTypeDefinitions20200901, Peddler::APIs::Replenishment20221107, Peddler::APIs::Reports20210630, Peddler::APIs::SalesV1, Peddler::APIs::SellerWallet20240301, Peddler::APIs::SellersV1, Peddler::APIs::ServicesV1, Peddler::APIs::ShipmentInvoicingV0, Peddler::APIs::ShippingV1, Peddler::APIs::ShippingV2, Peddler::APIs::SolicitationsV1, Peddler::APIs::SupplySources20200701, Peddler::APIs::Tokens20210301, Peddler::APIs::Transfers20240601, Peddler::APIs::Uploads20201101, Peddler::APIs::Vehicles20241101, Peddler::APIs::VendorDirectFulfillmentInventoryV1, Peddler::APIs::VendorDirectFulfillmentOrders20211228, Peddler::APIs::VendorDirectFulfillmentOrdersV1, Peddler::APIs::VendorDirectFulfillmentPaymentsV1, Peddler::APIs::VendorDirectFulfillmentSandboxTestData20211028, Peddler::APIs::VendorDirectFulfillmentShipping20211228, Peddler::APIs::VendorDirectFulfillmentShippingV1, Peddler::APIs::VendorDirectFulfillmentTransactions20211228, Peddler::APIs::VendorDirectFulfillmentTransactionsV1, Peddler::APIs::VendorInvoicesV1, Peddler::APIs::VendorOrdersV1, Peddler::APIs::VendorShipmentsV1, Peddler::APIs::VendorTransactionStatusV1

Defined Under Namespace

Classes: CannotSandbox, MustSandbox

Constant Summary collapse

TRANSIENT_STATUSES = 
[429, 500, 502, 503, 504].freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(aws_region, access_token, retries: 0, http: HTTP::Client.new) ⇒ API

Returns a new instance of API.

Parameters:

  • aws_region (String) —

    The AWS region to use for the endpoint

  • access_token (String) —

    The access token for authentication

  • retries (Integer) (defaults to: 0) —

    The number of retries if throttled (default: 0)

  • http (HTTP::Client) (defaults to: HTTP::Client.new) —

    HTTP client



29
30
31
32
33
34
35
 
# File 'lib/peddler/api.rb', line 29

def initialize(aws_region, access_token, retries: 0, http: HTTP::Client.new)
  @endpoint = Endpoint.find(aws_region)
  @access_token = access_token
  @retries = retries
  @http = http
  @sandbox = false
end

Instance Attribute Details

#access_token ⇒ String (readonly)

Returns:

  • (String) 


18
19
20
 
# File 'lib/peddler/api.rb', line 18

def access_token
  @access_token
end

#endpoint ⇒ Peddler::Endpoint (readonly)

Returns:



15
16
17
 
# File 'lib/peddler/api.rb', line 15

def endpoint
  @endpoint
end

#retries ⇒ Integer (readonly)

Number of retries if throttled (default: 0)

Returns:

  • (Integer) 


23
24
25
 
# File 'lib/peddler/api.rb', line 23

def retries
  @retries
end

Instance Method Details

#endpoint_uri ⇒ URI::HTTPS

Returns:

  • (URI::HTTPS) 


38
39
40
 
# File 'lib/peddler/api.rb', line 38

def endpoint_uri
  sandbox? ? endpoint.sandbox : endpoint.production
end

#http(rate_limit: nil) ⇒ HTTP::Session

Returns:

  • (HTTP::Session)

See Also:



59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
 
# File 'lib/peddler/api.rb', line 59

def http(rate_limit: nil)
  client = @http.headers(
    "Host" => endpoint_uri.host,
    "User-Agent" => user_agent,
    "X-Amz-Access-Token" => access_token,
    "X-Amz-Date" => timestamp,
  )

  return client if retries.zero?

  on_retry = ->(_req, _err, res) {
    Thread.current[:peddler_last_retry_status] = res&.status
  }

  delay = ->(iteration) {
    last_status = Thread.current[:peddler_last_retry_status]

    if last_status == 429 && rate_limit
      # Rate-limit-aware exponential backoff with jitter if throttled
      # @see https://aws.amazon.com/blogs/architecture/exponential-backoff-and-jitter/
      initial_delay = sandbox? ? 0.2 : 1.0 / rate_limit
      (initial_delay * (2.0**(iteration - 1))) + (rand * 0.1)
    else
      # Standard backoff for network errors and 5xx
      (2.0**(iteration - 1)) - 1 + rand
    end
  }

  client.retriable(
    tries: retries + 1,
    delay: delay,
    on_retry: on_retry,
    retry_statuses: TRANSIENT_STATUSES,
  )
end

#sandbox ⇒ self

Switches to the SP-API sandbox to make test calls

Returns:

  • (self)

See Also:



46
47
48
49
 
# File 'lib/peddler/api.rb', line 46

def sandbox
  @sandbox = true
  self
end

#sandbox? ⇒ Boolean

Returns:

  • (Boolean) 


52
53
54
 
# File 'lib/peddler/api.rb', line 52

def sandbox?
  @sandbox
end