109 lines
2.6 KiB
Go
109 lines
2.6 KiB
Go
package amazon
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"net/http"
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"os"
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)
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const (
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// SandboxURL is the endpoint for local environment.
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SandboxURL string = "http://localhost:8080/RVSSandbox"
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// ProductionURL is the endpoint for production environment.
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ProductionURL string = "https://appstore-sdk.amazon.com"
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)
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func getSandboxURL() string {
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url := os.Getenv("IAP_SANDBOX_URL")
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if url == "" {
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url = SandboxURL
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}
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return url
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}
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// The IAPResponse type has the response properties
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type IAPResponse struct {
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ReceiptID string `json:"receiptId"`
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ProductType string `json:"productType"`
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ProductID string `json:"productId"`
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PurchaseDate int64 `json:"purchaseDate"`
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CancelDate int64 `json:"cancelDate"`
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TestTransaction bool `json:"testTransaction"`
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}
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// The IAPResponseError typs has error message and status.
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type IAPResponseError struct {
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Message string `json:"message"`
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Status bool `json:"status"`
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}
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// IAPClient is an interface to call validation API in Amazon App Store
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type IAPClient interface {
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Verify(context.Context, string, string) (IAPResponse, error)
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}
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// Client implements IAPClient
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type Client struct {
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URL string
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Secret string
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httpCli *http.Client
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}
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// New creates a client object
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func New(secret string) *Client {
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client := &Client{
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URL: getSandboxURL(),
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Secret: secret,
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httpCli: http.DefaultClient,
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}
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if os.Getenv("IAP_ENVIRONMENT") == "production" {
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client.URL = ProductionURL
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}
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return client
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}
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// NewWithClient creates a client with a custom client.
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func NewWithClient(secret string, cli *http.Client) *Client {
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client := &Client{
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URL: getSandboxURL(),
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Secret: secret,
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httpCli: cli,
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}
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if os.Getenv("IAP_ENVIRONMENT") == "production" {
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client.URL = ProductionURL
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}
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return client
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}
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// Verify sends receipts and gets validation result
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func (c *Client) Verify(ctx context.Context, userID string, receiptID string) (IAPResponse, error) {
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result := IAPResponse{}
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url := fmt.Sprintf("%v/version/1.0/verifyReceiptId/developer/%v/user/%v/receiptId/%v", c.URL, c.Secret, userID, receiptID)
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req, err := http.NewRequest("GET", url, nil)
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if err != nil {
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return result, err
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}
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req = req.WithContext(ctx)
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resp, err := c.httpCli.Do(req)
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if err != nil {
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return result, fmt.Errorf("%v", err)
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}
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defer resp.Body.Close()
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if resp.StatusCode < 200 || resp.StatusCode >= 300 {
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responseError := IAPResponseError{}
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err = json.NewDecoder(resp.Body).Decode(&responseError)
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return result, errors.New(responseError.Message)
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}
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err = json.NewDecoder(resp.Body).Decode(&result)
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return result, err
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}
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