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|
package auth
import (
"context"
"database/sql"
"errors"
"fmt"
"log/slog"
"time"
"github.com/ansg191/ibd-trader/backend/internal/database"
"github.com/ansg191/ibd-trader/backend/internal/ibd"
"github.com/ansg191/ibd-trader/backend/internal/keys"
"github.com/ansg191/ibd-trader/backend/internal/leader/manager/ibd/auth"
"github.com/ansg191/ibd-trader/backend/internal/redis/taskqueue"
"github.com/redis/go-redis/v9"
)
const (
lockTimeout = 1 * time.Minute
dequeueTimeout = 5 * time.Second
)
func RunAuthScraper(
ctx context.Context,
client *ibd.Client,
redis *redis.Client,
db database.TransactionExecutor,
kms keys.KeyManagementService,
name string,
) error {
queue, err := taskqueue.New(
ctx,
redis,
auth.Queue,
name,
taskqueue.WithEncoding[auth.TaskInfo](auth.QueueEncoding),
)
if err != nil {
return err
}
for {
select {
case <-ctx.Done():
return ctx.Err()
default:
waitForTask(ctx, queue, client, db, kms)
}
}
}
func waitForTask(
ctx context.Context,
queue taskqueue.TaskQueue[auth.TaskInfo],
client *ibd.Client,
db database.TransactionExecutor,
kms keys.KeyManagementService,
) {
task, err := queue.Dequeue(ctx, lockTimeout, dequeueTimeout)
if err != nil {
slog.ErrorContext(ctx, "Failed to dequeue task", "error", err)
return
}
if task == nil {
// No task available.
return
}
slog.DebugContext(ctx, "Picked up auth task", "task", task.ID, "user", task.Data.UserSubject)
ch := make(chan error)
defer close(ch)
go func() {
ch <- scrapeCookies(ctx, client, db, kms, task.Data.UserSubject)
}()
ticker := time.NewTicker(lockTimeout / 5)
defer ticker.Stop()
for {
select {
case <-ctx.Done():
// The context was canceled. Return early.
return
case <-ticker.C:
// Extend the lock periodically.
func() {
ctx, cancel := context.WithTimeout(ctx, lockTimeout/5)
defer cancel()
err := queue.Extend(ctx, task.ID)
if err != nil {
slog.ErrorContext(ctx, "Failed to extend lock", "error", err)
}
}()
case err = <-ch:
// scrapeCookies has completed.
if err != nil {
slog.ErrorContext(ctx, "Failed to scrape cookies", "error", err)
_, err = queue.Return(ctx, task.ID, err)
if err != nil {
slog.ErrorContext(ctx, "Failed to return task", "error", err)
return
}
} else {
err = queue.Complete(ctx, task.ID, "")
if err != nil {
slog.ErrorContext(ctx, "Failed to complete task", "error", err)
return
}
slog.DebugContext(ctx, "Authenticated user", "user", task.Data.UserSubject)
}
return
}
}
}
func scrapeCookies(
ctx context.Context,
client *ibd.Client,
db database.TransactionExecutor,
kms keys.KeyManagementService,
user string,
) error {
ctx, cancel := context.WithTimeout(ctx, lockTimeout)
defer cancel()
// Check if the user has valid cookies
done, err := hasValidCookies(ctx, db, user)
if err != nil {
return fmt.Errorf("failed to check cookies: %w", err)
}
if done {
return nil
}
// Health check degraded cookies
done, err = healthCheckDegradedCookies(ctx, client, db, kms, user)
if err != nil {
return fmt.Errorf("failed to health check cookies: %w", err)
}
if done {
return nil
}
// No cookies are valid, so scrape new cookies
return scrapeNewCookies(ctx, client, db, kms, user)
}
func hasValidCookies(ctx context.Context, db database.Executor, user string) (bool, error) {
// Check if the user has non-degraded cookies
row := db.QueryRowContext(ctx, `
SELECT 1
FROM ibd_tokens
WHERE user_subject = $1
AND expires_at > NOW()
AND degraded = FALSE;`, user)
var exists bool
err := row.Scan(&exists)
if errors.Is(err, sql.ErrNoRows) {
return false, nil
}
if err != nil {
return false, fmt.Errorf("failed to get non-degraded cookies: %w", err)
}
return true, nil
}
func healthCheckDegradedCookies(
ctx context.Context,
client *ibd.Client,
db database.Executor,
kms keys.KeyManagementService,
user string,
) (bool, error) {
// Check if the user has degraded cookies
cookies, err := database.GetCookies(ctx, db, kms, user, true)
if err != nil {
return false, fmt.Errorf("failed to get degraded cookies: %w", err)
}
valid := false
for _, cookie := range cookies {
slog.DebugContext(ctx, "Health checking cookie", "cookie", cookie.ID)
// Health check the cookie
up, err := client.UserInfo(ctx, cookie.ToHTTPCookie())
if err != nil {
slog.ErrorContext(ctx, "Failed to health check cookie", "error", err)
continue
}
if up.Status != ibd.UserStatusSubscriber {
continue
}
// Cookie is valid
valid = true
// Update the cookie
err = database.RepairCookie(ctx, db, cookie.ID)
if err != nil {
slog.ErrorContext(ctx, "Failed to repair cookie", "error", err)
}
}
return valid, nil
}
func scrapeNewCookies(
ctx context.Context,
client *ibd.Client,
db database.TransactionExecutor,
kms keys.KeyManagementService,
user string,
) error {
// Get the user's credentials
username, password, err := database.GetIBDCreds(ctx, db, kms, user)
if err != nil {
return fmt.Errorf("failed to get IBD credentials: %w", err)
}
// Scrape the user's cookies
cookie, err := client.Authenticate(ctx, username, password)
if err != nil {
return fmt.Errorf("failed to authenticate user: %w", err)
}
// Store the cookie
err = database.AddCookie(ctx, db, kms, user, cookie)
if err != nil {
return fmt.Errorf("failed to store cookie: %w", err)
}
return nil
}
|
