87 lines
2.0 KiB
Go
87 lines
2.0 KiB
Go
/*
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* Copyright 2020 The Dragonfly Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package idgen
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import (
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"strings"
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commonv1 "d7y.io/api/pkg/apis/common/v1"
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"d7y.io/dragonfly/v2/pkg/digest"
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neturl "d7y.io/dragonfly/v2/pkg/net/url"
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pkgstrings "d7y.io/dragonfly/v2/pkg/strings"
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)
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const (
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filterSeparator = "&"
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)
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// TaskID generates a task id.
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// filter is separated by & character.
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func TaskID(url string, meta *commonv1.UrlMeta) string {
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return taskID(url, meta, false)
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}
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// ParentTaskID generates a task id like TaskID, but without range.
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// this func is used to check the parent tasks for ranged requests
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func ParentTaskID(url string, meta *commonv1.UrlMeta) string {
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return taskID(url, meta, true)
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}
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// taskID generates a task id.
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// filter is separated by & character.
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func taskID(url string, meta *commonv1.UrlMeta, ignoreRange bool) string {
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if meta == nil {
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return digest.SHA256FromStrings(url)
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}
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filters := parseFilters(meta.Filter)
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var (
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u string
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err error
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)
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u, err = neturl.FilterQuery(url, filters)
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if err != nil {
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u = ""
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}
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data := []string{u}
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if meta.Digest != "" {
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data = append(data, meta.Digest)
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}
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if !ignoreRange && meta.Range != "" {
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data = append(data, meta.Range)
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}
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if meta.Tag != "" {
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data = append(data, meta.Tag)
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}
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return digest.SHA256FromStrings(data...)
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}
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// parseFilters parses a filter string to filter slice.
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func parseFilters(rawFilters string) []string {
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if pkgstrings.IsBlank(rawFilters) {
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return nil
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}
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return strings.Split(rawFilters, filterSeparator)
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}
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