Shopify.REST

Installation

Shopify.REST is published on Hex. Add it to your list of dependencies in mix.exs;

defp deps do
  { :shopify_rest, "~> 1.0" }
end

Shopify.REST requires you to provide an HTTP client and a JSON codec. hackney and jason are used by default. If you wish to use these defaults you will need to specify hackney and jason as dependencies as well.

Usage

You can send a request to the Shopify admin API by building a Shopify.REST.Operation struct and passing it as the first argument to Shopify.REST.request/2.

operation = %Shopify.REST.Operation{ method: :get, params: %{ fields: ["name"] }, path: "/shop.json" }

{:ok, response} = Shopify.REST.request(operation, %{access_token: "f85632530bf277ec9ac6f649fc327f17", shop: "some-shop"})

Shopify.REST.Operation is a struct that contains fields :method, :params and :path.

:method - an HTTP method and can be one of :delete, :get, :post or :put.
:params - a map containing the request body or query string depending on whether :method is :get (query string), :post or :put (request body).
:path - the path to send the requst to. Must begin with a forward slash.

Public Applications (Authentication with OAuth)

As a public app, when sending a request to Shopify, you can authenticate a by supplying an :access_token config field to the second argument of Shopify.REST.request/2.

See the Usage section for an example.

See Shopify’s official documentation for more details.

Private Application

Shopify provides support for authenticating a private application using basic HTTP authentication and the X-Shopify-Access-Token header (similar to authenticating with OAuth).

See Shopify’s official documentation for more details.

Access Token

Provide your private app’s password as the :access_token config value.

See the Usage section for an example.

Basic Authentication

You can authenticate via basic HTTP authentication in one of two ways.

You can provide {api key}:{password}@{shop}.myshopify.com as the :host config value.

operation = %Shopify.REST.Operation{ method: :get, params: %{ fields: ["name"] }, path: "/shop.json" }

api_key = "a1d5c494473570dde9beb107ebe7d0ba"
password = "93bbe468834c7dadbb7209c3223cb722"
shop = "some-shop"

{:ok, response} = Shopify.REST.request(operation, %{host: "#{api_key}:#{password}@#{shop}.myshopify.com"})

You can also provide an Authorization header with your api key and password joined by a colon (:), base-64 encoded and prepended with the string Basic.

operation = %Shopify.REST.Operation{ method: :get, params: %{ fields: ["name"] }, path: "/shop.json" }

api_key = "a1d5c494473570dde9beb107ebe7d0ba"
password = "93bbe468834c7dadbb7209c3223cb722"
shop = "some-shop"

header = Base.encode64("#{api_key}:#{password}") 

{:ok, response} = Shopify.REST.request(operation, %{headers: [{"Authorization", "Basic #{header}"}], shop: shop})

Verifying HMAC Signatures

Shopify.REST provides verify_hmac/2 and verify_hmac/3 functions for verifying HMAC signatures returned by the Shopify API.

Please see the Shopify Authentication with REST documentation for the technical details regarding HMAC verification.

verify_hmac/2

query = "code=0907a61c0c8d55e99db179b68161bc00&hmac=700e2dadb827fcc8609e9d5ce208b2e9cdaab9df07390d2cbca10d7c328fc4bf&shop=some-shop.myshopify.com&state=0.6784241404160823&timestamp=1337178173"
shared_secret = "hush"

{:ok, hmac} = Shopify.REST.verify_hmac(query, shared_secret)

verify_hmac/3

hmac = "700e2dadb827fcc8609e9d5ce208b2e9cdaab9df07390d2cbca10d7c328fc4bf"
message = "code=0907a61c0c8d55e99db179b68161bc00&shop=some-shop.myshopify.com&timestamp=1337178173"
shared_secret = "hush"

{:ok, hmac} = Shopify.HMAC.verify(hmac, message, shared_secret)

Configuration

Configuration is passed as a map to the second argument of Shopify.REST.request/2.

:access_token - Shopify access token for making authenticated requests
:headers - a list of additional headers to send when making a request.
```
         Defaults to `[]`.
```
:host - HTTP host to make requests to. Defaults to myshopify.com.
:http_client - the HTTP client used for making requests. Defaults to Shopify.REST.Client.Hackney.
:http_client_opts - additional options passed to :http_client. Defaults to [].
:json_codec - codec for encoding and decoding JSON payloads. Defaults to Jason.
:path - path to prefix on each request. Defaults to /admin.
:port - the HTTP port used when making a request
:protocol - the HTTP protocol used when making a request. Defaults to https.
:retry - whether to automatically retry failed API calls. May be true or false. Defaults to false.
:retry_opts - options used when performing retries. Defaults to [].
- :max_attempts - the maximum number of retry attempts. Defaults to 3.
:shop - subdomain of the shop that a request is to be made to
:version - version of the API to use. Defaults to nil. According to Shopify, when not specifying a version Shopify will use the oldest stable version of its API.