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client.go
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client.go
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package appstore
import (
"bytes"
"context"
"crypto/ecdsa"
"crypto/x509"
"encoding/base64"
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
"os"
"time"
"github.com/erictse/appstore-go/notification"
"github.com/erictse/appstore-go/refund"
"github.com/erictse/appstore-go/transaction"
"github.com/golang-jwt/jwt/v4"
)
const (
hostProd = "https://api.storekit.itunes.apple.com"
hostSandbox = "https://api.storekit-sandbox.itunes.apple.com"
pathNotificationHistory = "/inApps/v1/notifications/history"
pathOrderLookup = "/inApps/v1/lookup/"
pathRefundHistory = "/inApps/v2/refund/lookup/"
pathRequestTestNotification = "/inApps/v1/notifications/test"
pathSendConsumptionInfo = "/inApps/v1/transactions/consumption/"
pathSubscriptionExtend = "/inApps/v1/subscriptions/extend/"
pathSubscriptionMassExtend = "/inApps/v1/subscriptions/extend/mass/"
pathSubscriptionStatuses = "/inApps/v1/subscriptions/"
pathTestNotificationStatus = "/inApps/v1/notifications/test/"
pathTransactionHistory = "/inApps/v1/history/"
headerAuthorization = "Authorization"
headerContentType = "Content-Type"
contentTypeJSON = "application/json"
contentTypeFormURLEncoded = "application/x-www-form-urlencoded"
)
type AppleAPIClaims struct {
jwt.RegisteredClaims
BundleID string `json:"bid,omitempty"`
}
type Client struct {
httpClient *http.Client
certAppleInterm *x509.Certificate
certAppleRoot *x509.Certificate
claims *AppleAPIClaims
host *string
keyFunc jwt.Keyfunc
keyID *string
privateKey *ecdsa.PrivateKey
teamID *string
verifyOptions *x509.VerifyOptions
}
type JWSDecoder interface {
DecodeJWS(jwt.Keyfunc, []byte) error
}
type ClientOption func(*Client)
func WithSandbox() ClientOption {
return func(c *Client) {
host := hostSandbox
c.host = &host
}
}
func WithClaimsAndKey(bundleID, issuerID, keyID, teamID string, keyPEM []byte) (ClientOption, error) {
key, parseErr := jwt.ParseECPrivateKeyFromPEM(keyPEM)
if parseErr != nil {
return nil, fmt.Errorf("appleapi: could not read private key: %v", parseErr)
}
return func(c *Client) {
c.claims.Issuer = issuerID
c.claims.BundleID = bundleID
c.keyID = &keyID
c.privateKey = key
c.teamID = &teamID
}, nil
}
func WithAppleCerts(intermCertPath, rootCertPath string) (ClientOption, error) {
intermCertDER, err := os.ReadFile(intermCertPath)
if err != nil {
return nil, err
}
intermCert, err := x509.ParseCertificate(intermCertDER)
if err != nil {
return nil, err
}
intermPool := x509.NewCertPool()
intermPool.AddCert(intermCert)
certAppleRootDER, err := os.ReadFile(rootCertPath)
if err != nil {
return nil, err
}
rootCert, err := x509.ParseCertificate(certAppleRootDER)
if err != nil {
return nil, err
}
rootPool := x509.NewCertPool()
rootPool.AddCert(rootCert)
return func(c *Client) {
c.verifyOptions = &x509.VerifyOptions{
Intermediates: intermPool,
Roots: rootPool,
}
c.certAppleInterm = intermCert
c.certAppleRoot = rootCert
}, nil
}
func NewClient(opts ...ClientOption) (*Client, error) {
host := hostProd
keyFunc := func(t *jwt.Token) (any, error) {
if multi, ok := t.Header["x5c"].([]any); !ok {
return nil, fmt.Errorf("cert not found in JWS header")
} else if encoded, ok := multi[0].(string); !ok {
return nil, fmt.Errorf("invalid cert format in JWS header")
} else if decoded, err := base64.StdEncoding.DecodeString(encoded); err != nil {
return nil, fmt.Errorf("unable base64 decode JWS cert: %v", err)
} else if cert, err := x509.ParseCertificate(decoded); err != nil {
return nil, fmt.Errorf("could not parse JWS cert: %v", err)
} else {
return cert.PublicKey, nil
}
}
c := &Client{
httpClient: &http.Client{},
claims: &AppleAPIClaims{},
host: &host,
keyFunc: keyFunc,
}
c.claims.RegisteredClaims.Audience = []string{"appstoreconnect-v1"}
for _, opt := range opts {
opt(c)
}
return c, nil
}
func (c Client) endpoint(path string) string {
return *c.host + path
}
func (c Client) newClaims(issuedAt time.Time) jwt.Claims {
claims := c.claims
claims.RegisteredClaims.IssuedAt = jwt.NewNumericDate(issuedAt)
claims.RegisteredClaims.ExpiresAt = jwt.NewNumericDate(issuedAt.Add(time.Minute * 15))
return claims
}
func (c *Client) newRequest(ctx context.Context, method, url string, body io.Reader) (*http.Request, error) {
token := jwt.NewWithClaims(jwt.SigningMethodES256, c.newClaims(time.Now()))
token.Header["kid"] = c.keyID
jwtString, err := token.SignedString(c.privateKey)
if err != nil {
return nil, err
}
header := make(http.Header)
header.Set(headerContentType, contentTypeFormURLEncoded)
header.Set(headerAuthorization, fmt.Sprintf("Bearer %s", jwtString))
req, err := http.NewRequestWithContext(ctx, method, url, body)
if err != nil {
return nil, err
}
req.Header = header
return req, nil
}
func (c *Client) send(req *http.Request, decoder JWSDecoder) error {
resp, doErr := c.httpClient.Do(req)
if doErr != nil {
return doErr
}
defer resp.Body.Close()
data, readErr := io.ReadAll(resp.Body)
if readErr != nil {
return readErr
}
switch resp.StatusCode {
case http.StatusOK:
if err := decoder.DecodeJWS(c.keyFunc, data); err != nil {
return err
}
return nil
case http.StatusUnauthorized:
return fmt.Errorf("JWT authorization header is invalid: %s", req.Header.Get(headerAuthorization))
}
var payload Error
if err := json.Unmarshal(data, &payload); err != nil {
return fmt.Errorf("status: %s err: %v", resp.Status, err)
}
return payload
}
func (c *Client) ExtendRenewalDate(ctx context.Context, originalTransactionID string,
body ExtendRenewalDateRequest) (ExtendRenewalDateResponse, error) {
var r ExtendRenewalDateResponse
data, err := json.Marshal(body)
if err != nil {
return r, err
}
uri := c.endpoint(pathSubscriptionExtend + originalTransactionID)
req, err := c.newRequest(ctx, http.MethodPut, uri, bytes.NewReader(data))
if err != nil {
return r, fmt.Errorf("appleapi: client ExtendRenewalDate: %v", err)
}
req.Header.Set(headerContentType, contentTypeJSON)
if err := c.send(req, &r); err != nil {
return r, fmt.Errorf("appleapi: client ExtendRenewalDate: %v", err)
}
return r, nil
}
func (c *Client) GetMassExtendRenewalDateStatus(ctx context.Context, productID, requestID string) (MassExtendRenewalDateStatusResponse, error) {
var r MassExtendRenewalDateStatusResponse
uri := c.endpoint(pathSubscriptionMassExtend + requestID + "/" + productID)
req, err := c.newRequest(ctx, http.MethodGet, uri, nil)
if err != nil {
return r, fmt.Errorf("appleapi: client GetMassExtendRenewalDateStatus: %v", err)
}
if err := c.send(req, &r); err != nil {
return r, fmt.Errorf("appleapi: client GetMassExtendRenewalDateStatus: %v", err)
}
return r, nil
}
func (c *Client) GetNotificationHistory(ctx context.Context, start, end time.Time, opts ...notification.HistoryOption) (NotificationHistoryResponse, error) {
var r NotificationHistoryResponse
query := url.Values{}
body := notification.HistoryBody{
StartDate: start.UnixMilli(),
EndDate: end.UnixMilli(),
}
for _, opt := range opts {
opt(&query, &body)
}
data, jsonErr := json.Marshal(body)
if jsonErr != nil {
return r, jsonErr
}
buf := bytes.NewBuffer(data)
uri := c.endpoint(pathNotificationHistory)
if len(query) > 0 {
uri = fmt.Sprintf("%s?%s", uri, query.Encode())
}
req, err := c.newRequest(ctx, http.MethodPost, uri, buf)
if err != nil {
return r, fmt.Errorf("appleapi: client GetNotificationHistory: %v", err)
}
req.Header.Set(headerContentType, contentTypeJSON)
if err := c.send(req, &r); err != nil {
return r, fmt.Errorf("appleapi: client GetNotificationHistory: %v", err)
}
return r, nil
}
func (c *Client) GetRefundHistory(ctx context.Context, originalTransactionID string, opts ...refund.HistoryOption) (RefundHistoryResponse, error) {
var r RefundHistoryResponse
query := url.Values{}
for _, opt := range opts {
opt(&query)
}
uri := c.endpoint(pathRefundHistory + originalTransactionID)
if len(query) > 0 {
uri = fmt.Sprintf("%s?%s", uri, query.Encode())
}
req, err := c.newRequest(ctx, http.MethodGet, uri, nil)
if err != nil {
return r, fmt.Errorf("appleapi: client GetRefundHistory: %v", err)
}
req.Header.Set(headerContentType, contentTypeJSON)
if err := c.send(req, &r); err != nil {
return r, fmt.Errorf("appleapi: client GetRefundHistory: %v", err)
}
return r, nil
}
func (c *Client) GetSubscriptionStatuses(ctx context.Context, originalTransactionID string) (StatusResponse, error) {
var r StatusResponse
uri := c.endpoint(pathSubscriptionStatuses + originalTransactionID)
req, err := c.newRequest(ctx, http.MethodGet, uri, nil)
if err != nil {
return r, fmt.Errorf("appleapi: client GetSubscriptionStatuses: %v", err)
}
if err := c.send(req, &r); err != nil {
return r, fmt.Errorf("appleapi: client GetSubscriptionStatuses: %v", err)
}
return r, nil
}
func (c *Client) GetTestNotificationStatus(ctx context.Context, token string) (CheckTestNotificationResponse, error) {
var resp CheckTestNotificationResponse
uri := c.endpoint(pathTestNotificationStatus + token)
req, err := c.newRequest(ctx, http.MethodGet, uri, nil)
if err != nil {
return resp, fmt.Errorf("appleapi: client RequestTestNotification: %v", err)
}
if err := c.send(req, &resp); err != nil {
return resp, fmt.Errorf("appleapi: client RequestTestNotification: %v", err)
}
return resp, nil
}
func (c *Client) GetTransactionHistory(ctx context.Context, originalTransactionID string, opts ...transaction.HistoryOption) (HistoryResponse, error) {
var r HistoryResponse
query := url.Values{}
for _, opt := range opts {
opt(&query)
}
uri := c.endpoint(pathTransactionHistory + originalTransactionID)
if len(query) > 0 {
uri = fmt.Sprintf("%s?%s", uri, query.Encode())
}
req, err := c.newRequest(ctx, http.MethodGet, uri, nil)
if err != nil {
return r, fmt.Errorf("appleapi: client GetTransactionHistory: %v", err)
}
if err := c.send(req, &r); err != nil {
return r, fmt.Errorf("appleapi: client GetTransactionHistory: %v", err)
}
return r, nil
}
func (c *Client) LookupOrder(ctx context.Context, orderID string) (OrderLookupResponse, error) {
var r OrderLookupResponse
uri := c.endpoint(pathOrderLookup + orderID)
req, err := c.newRequest(ctx, http.MethodGet, uri, nil)
if err != nil {
return r, fmt.Errorf("appleapi: client create request LookupOrder: %v", err)
}
if err := c.send(req, &r); err != nil {
return r, fmt.Errorf("appleapi: client send LookupOrder: %v", err)
}
return r, nil
}
func (c *Client) MassExtendRenewalDates(ctx context.Context, body MassExtendRenewalDateRequest) (MassExtendRenewalDateResponse, error) {
var r MassExtendRenewalDateResponse
data, err := json.Marshal(body)
if err != nil {
return r, err
}
uri := c.endpoint(pathSubscriptionMassExtend)
req, err := c.newRequest(ctx, http.MethodPost, uri, bytes.NewReader(data))
if err != nil {
return r, fmt.Errorf("appleapi: client MassExtendRenewalDates: %v", err)
}
req.Header.Set(headerContentType, contentTypeJSON)
if err := c.send(req, &r); err != nil {
return r, fmt.Errorf("appleapi: client MassExtendRenewalDates: %v", err)
}
return r, nil
}
func (c *Client) RequestTestNotification(ctx context.Context) (SendTestNotificationResponse, error) {
var r SendTestNotificationResponse
uri := c.endpoint(pathRequestTestNotification)
req, err := c.newRequest(ctx, http.MethodPost, uri, nil)
if err != nil {
return r, fmt.Errorf("appleapi: client RequestTestNotification: %v", err)
}
if err := c.send(req, &r); err != nil {
return r, fmt.Errorf("appleapi: client RequestTestNotification: %v", err)
}
return r, nil
}
func (c *Client) SendConsumptionInfo(ctx context.Context, originalTransactionID string, body ConsumptionRequest) error {
var r SendTestNotificationResponse
uri := c.endpoint(pathSendConsumptionInfo + originalTransactionID)
data, jsonErr := json.Marshal(body)
if jsonErr != nil {
return jsonErr
}
req, err := c.newRequest(ctx, http.MethodPut, uri, bytes.NewReader(data))
if err != nil {
return fmt.Errorf("appleapi: client SendConsumptionInfo: %v", err)
}
req.Header.Set(headerContentType, contentTypeJSON)
if err := c.send(req, &r); err != nil {
return fmt.Errorf("appleapi: client SendConsumptionInfo: %v", err)
}
return nil
}