| // Copyright 2015 The LUCI Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package types |
| |
| import ( |
| "fmt" |
| ) |
| |
| const ( |
| // MaxTagKeySize is the maximum number of bytes allowed in a tag's key |
| // parameter. |
| MaxTagKeySize = 64 |
| |
| // MaxTagValueSize is the maximum number of bytes allowed in a tag's value |
| // parameter. |
| MaxTagValueSize = 4096 |
| ) |
| |
| // ValidateTag returns an error if a tag contains a nonconfirming value. |
| func ValidateTag(k, v string) error { |
| if err := StreamName(k).Validate(); err != nil { |
| return fmt.Errorf("invalid tag key: %s", err) |
| } |
| if len(k) > MaxTagKeySize { |
| return fmt.Errorf("tag key exceeds maximum size (%d > %d)", len(k), MaxTagKeySize) |
| } |
| if len(v) > MaxTagValueSize { |
| return fmt.Errorf("tag value exceeds maximum size (%d > %d)", len(v), MaxTagValueSize) |
| } |
| return nil |
| } |