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|
package ibd
import (
"context"
"errors"
"log/slog"
"net/http"
"slices"
"github.com/ansg191/ibd-trader/backend/internal/database"
"github.com/ansg191/ibd-trader/backend/internal/ibd/transport"
"github.com/ansg191/ibd-trader/backend/internal/keys"
)
var ErrNoAvailableCookies = errors.New("no available cookies")
var ErrNoAvailableTransports = errors.New("no available transports")
type Client struct {
transports []transport.Transport
db database.Executor
kms keys.KeyManagementService
}
func NewClient(
db database.Executor,
kms keys.KeyManagementService,
transports ...transport.Transport,
) *Client {
return &Client{transports, db, kms}
}
func (c *Client) getCookie(ctx context.Context, subject *string) (uint, *http.Cookie, error) {
if subject == nil {
// No subject requirement, get any cookie
cookie, err := database.GetAnyCookie(ctx, c.db, c.kms)
if err != nil {
return 0, nil, err
}
if cookie == nil {
return 0, nil, ErrNoAvailableCookies
}
return cookie.ID, cookie.ToHTTPCookie(), nil
}
// Get cookie by subject
cookies, err := database.GetCookies(ctx, c.db, c.kms, *subject, false)
if err != nil {
return 0, nil, err
}
if len(cookies) == 0 {
return 0, nil, ErrNoAvailableCookies
}
cookie := cookies[0]
return cookie.ID, cookie.ToHTTPCookie(), nil
}
func (c *Client) Do(req *http.Request, opts ...optionFunc) (*http.Response, error) {
o := defaultOptions
for _, opt := range opts {
opt(&o)
}
// Sort and filter transports by properties
transports := transport.FilterTransports(c.transports, o.requiredProps)
transport.SortTransports(transports)
for _, tp := range transports {
resp, err := tp.Do(req)
if errors.Is(err, transport.ErrUnsupportedRequest) {
// Skip unsupported transport
continue
}
if err != nil {
slog.ErrorContext(req.Context(), "transport error",
"transport", tp.String(),
"error", err,
)
continue
}
if slices.Contains(o.expectedStatuses, resp.StatusCode) {
return resp, nil
} else {
slog.ErrorContext(req.Context(), "unexpected status code",
"transport", tp.String(),
"expected", o.expectedStatuses,
"actual", resp.StatusCode,
)
continue
}
}
return nil, ErrNoAvailableTransports
}
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