// load loads the session from dynamodb.
// It checks expiration date before it returns the session.
// returns error if session data does not exist in dynamodb or was expired.
func (s *Store) load(session *sessions.Session) error {
data := make(map[string]interface{})
err := s.Table.GetItem(
attributes.String(session.ID), nil,
&data,
option.ConsistentRead(),
)
if err != nil {
return err
}
expiresAtData, ok := data[SessionExpiresName]
if !ok {
return errSessionBroken
}
var expiresAtInt int64
switch v := expiresAtData.(type) {
case int64:
expiresAtInt = v
case int:
expiresAtInt = int64(v)
// otherwise it will be used as zero-value
}
expiresAt := time.Unix(expiresAtInt, 0)
if time.Now().After(expiresAt) {
s.delete(session)
// Don't want to return nil even we delete the session successfully
return errSessionExpired
}
value, ok := data[SessionDataKeyName]
if !ok {
return errSessionNotFound
}
blob, ok := value.([]byte)
if !ok {
return errSessionBroken
}
return gob.NewDecoder(bytes.NewReader(blob)).Decode(&session.Values)
}
func TestTable(t *testing.T) {
name := os.Getenv("TEST_DYNAMODB_TABLE_NAME")
if len(name) == 0 {
t.Skip("TEST_DYNAMODB_TABLE_NAME must be set")
}
assert := assert.New(t)
dtable := New(dynamodb.New(nil), name).
WithHashKey("user_id", "S").
WithRangeKey("date", "N")
now := time.Now()
items := []TestItem{
{
UserID: "foobar-1",
Date: now.Unix(),
Status: "waiting",
},
TestItem{
UserID: "foobar-1",
Date: now.Add(1 * time.Minute).Unix(),
Status: "waiting",
},
}
hashKey := attributes.String(items[0].UserID)
rangeKey := attributes.Number(items[0].Date)
status := attributes.String(items[0].Status)
role := []string{"user", "manager"}
sort.Strings(role)
// Try to get non-exist key and it should return table.ErrItemNotFound
{
var actualItem TestItem
err := dtable.GetItem(hashKey, rangeKey, &actualItem, option.ConsistentRead())
assert.Equal(ErrItemNotFound, err)
}
{
for _, item := range items {
if err := dtable.PutItem(item); err != nil {
t.Error(err)
}
}
}
// Add conditon and it should fail
{
err := dtable.PutItem(
items[0],
option.PutExpressionAttributeName("date", "#date"),
option.PutCondition("attribute_not_exists(#date)"),
)
assert.Error(err)
dynamoErr, ok := err.(awserr.Error)
assert.True(ok, "err must be awserr.Error")
assert.Equal("ConditionalCheckFailedException", dynamoErr.Code())
}
// Update the item with incrementing counter and setting role as StringSet
{
err := dtable.UpdateItem(
hashKey,
rangeKey,
option.UpdateExpressionAttributeName("login_count", "#count"),
option.UpdateExpressionAttributeName("role", "#role"),
option.UpdateExpressionAttributeValue(":i", attributes.Number(1)),
option.UpdateExpressionAttributeValue(":role", attributes.StringSet(role)),
option.UpdateExpression("ADD #count :i SET #role = :role"),
)
if err != nil {
t.Error(err)
}
}
// Get the item
{
var actualItem TestItem
if err := dtable.GetItem(hashKey, rangeKey, &actualItem, option.ConsistentRead()); err != nil {
t.Error(err)
}
sort.Strings(actualItem.Role)
assert.Equal("waiting", actualItem.Status)
assert.Equal(1, actualItem.LoginCount)
assert.Equal(role, actualItem.Role)
}
// Update the item with decrementing counter and removing role
{
err := dtable.UpdateItem(
hashKey,
rangeKey,
option.UpdateExpressionAttributeName("login_count", "#count"),
option.UpdateExpressionAttributeName("role", "#role"),
option.UpdateExpressionAttributeValue(":i", attributes.Number(-1)),
option.UpdateExpression("ADD #count :i REMOVE #role"),
)
if err != nil {
t.Error(err)
}
}
// Query the items
{
var actualItems []TestItem
lastEvaluatedKey, err := dtable.Query(
&actualItems,
option.QueryExpressionAttributeValue(":hashval", hashKey),
option.QueryKeyConditionExpression("user_id = :hashval"),
)
assert.NoError(err)
assert.Nil(lastEvaluatedKey)
assert.Len(actualItems, 2)
// default is ascending order
assert.Equal(items, actualItems)
}
// Delete the item with the conditon but it should fail
{
err := dtable.DeleteItem(
hashKey,
rangeKey,
option.DeleteExpressionAttributeName("status", "#status"),
option.DeleteExpressionAttributeValue(":s", attributes.String("done")),
option.DeleteCondition("#status = :s"),
)
if err == nil {
t.Error("DeleteItem should fail but not fail")
}
dynamoErr, ok := err.(awserr.Error)
if !ok {
t.Error("err must be awserr.Error")
}
if dynamoErr.Code() != "ConditionalCheckFailedException" {
t.Error("dynamoErr must be conditional error")
}
}
// Delete the item with the conditon and it should succeed
{
for _, item := range items {
hk := attributes.String(item.UserID)
rk := attributes.Number(item.Date)
err := dtable.DeleteItem(
hk,
rk,
option.DeleteExpressionAttributeName("status", "#status"),
option.DeleteExpressionAttributeValue(":s", status),
option.DeleteCondition("#status = :s"),
)
if err != nil {
t.Error(err)
}
}
}
}