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// Package origin is a client for parts of the Origin API used by Northstar for
// authentication.
package origin
import (
"context"
"encoding/xml"
"errors"
"fmt"
"io"
"mime"
"net/http"
"strconv"
"strings"
"sync/atomic"
)
var (
ErrInvalidResponse = errors.New("invalid origin api response")
ErrOrigin = errors.New("origin api error")
ErrAuthRequired = errors.New("origin authentication required")
)
type SIDStore interface {
GetSID(ctx context.Context) (string, error)
SetSID(ctx context.Context, sid string) error
}
type MemorySIDStore struct {
SID atomic.Pointer[string]
}
var _ SIDStore = (*MemorySIDStore)(nil)
func (s *MemorySIDStore) GetSID(ctx context.Context) (string, error) {
if v := s.SID.Load(); v != nil {
return *v, nil
}
return "", nil
}
func (s *MemorySIDStore) SetSID(ctx context.Context, sid string) error {
s.SID.Store(&sid)
return nil
}
type Client struct {
Endpoint string
Username string
Password string
SIDStore SIDStore
Transport http.Transport
}
func (c *Client) endpoint() string {
if c.Endpoint != "" {
return strings.TrimRight(c.Endpoint, "/")
}
return "https://api1.origin.com"
}
func (c *Client) do(req *http.Request) (*http.Response, error) {
return (&http.Client{
Transport: &c.Transport,
Jar: nil,
}).Do(req)
}
func (c *Client) Login(ctx context.Context) error {
panic("not implemented")
}
type UserInfo struct {
UserID int
PersonaID string
EAID string
}
func (c *Client) GetUserInfo(ctx context.Context, uid ...int) ([]UserInfo, error) {
return c.getUserInfo(true, ctx, uid...)
}
func (c *Client) getUserInfo(retry bool, ctx context.Context, uid ...int) ([]UserInfo, error) {
uids := make([]string, len(uid))
for _, x := range uid {
uids = append(uids, strconv.Itoa(x))
}
req, err := http.NewRequestWithContext(ctx, http.MethodGet, c.endpoint()+"/atom/users?userIds="+strings.Join(uids, ","), nil)
if err != nil {
return nil, err
}
sid, err := c.SIDStore.GetSID(ctx)
if err != nil {
return nil, err
}
req.Header.Set("AuthToken", sid)
req.Header.Set("X-Origin-Platform", "UnknownOS")
req.Header.Set("Referrer", "https://www.origin.com/")
resp, err := c.do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
buf, root, err := checkResponseXML(resp)
if err != nil {
return nil, err
}
return parseUserInfo(buf, root)
}
func checkResponseXML(resp *http.Response) ([]byte, xml.Name, error) {
var root xml.Name
buf, err := io.ReadAll(resp.Body)
if err != nil {
return buf, root, err
}
if mt, _, _ := mime.ParseMediaType(resp.Header.Get("Content-Type")); mt != "application/xml" && mt != "text/xml" {
if resp.StatusCode != http.StatusOK {
return buf, root, fmt.Errorf("%w: response status %d (%s)", ErrOrigin, resp.StatusCode, resp.Status)
}
return buf, root, fmt.Errorf("%w: expected xml, got %q", ErrOrigin, mt)
}
if err := xml.Unmarshal(buf, &root); err != nil {
return buf, root, fmt.Errorf("%w: invalid xml: %v", ErrInvalidResponse, err)
}
if root.Local == "error" {
var obj struct {
Code int `xml:"code,attr"`
Failure []struct {
Field string `xml:"field,attr"`
Cause string `xml:"cause,attr"`
Value string `xml:"value,attr"`
} `xml:"failure"`
}
if err := xml.Unmarshal(buf, &obj); err != nil {
return buf, root, fmt.Errorf("%w: response %#q (unmarshal: %v)", ErrOrigin, string(buf), err)
}
for _, f := range obj.Failure {
if f.Cause == "invalid_token" {
return buf, root, fmt.Errorf("%w: invalid token", ErrAuthRequired)
}
}
if len(obj.Failure) == 1 {
return buf, root, fmt.Errorf("%w: error %d: %s (%s) %q", ErrOrigin, obj.Code, obj.Failure[0].Cause, obj.Failure[0].Field, obj.Failure[0].Value)
}
return buf, root, fmt.Errorf("%w: error %d: response %#q", ErrOrigin, obj.Code, string(buf))
}
return buf, root, nil
}
func parseUserInfo(buf []byte, root xml.Name) ([]UserInfo, error) {
var obj struct {
User []struct {
UserID string `xml:"userId"`
PersonaID string `xml:"personaId"`
EAID string `xml:"EAID"`
} `xml:"user"`
}
if root.Local != "users" {
return nil, fmt.Errorf("%w: unexpected %s response", ErrInvalidResponse, root.Local)
}
if err := xml.Unmarshal(buf, &obj); err != nil {
return nil, fmt.Errorf("%w: invalid xml: %v", ErrInvalidResponse, err)
}
res := make([]UserInfo, len(obj.User))
for i, x := range obj.User {
var v UserInfo
if uid, err := strconv.Atoi(x.UserID); err == nil {
v.UserID = uid
} else {
return nil, fmt.Errorf("parse userId %q: %w", x.UserID, err)
}
v.PersonaID = x.PersonaID
v.EAID = x.EAID
res[i] = v
}
return res, nil
}
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