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task_id.go
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task_id.go
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/*
* Copyright 2020 The Dragonfly 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 idgen
import (
"fmt"
"strings"
commonv1 "d7y.io/api/v2/pkg/apis/common/v1"
pkgdigest "d7y.io/dragonfly/v2/pkg/digest"
neturl "d7y.io/dragonfly/v2/pkg/net/url"
pkgstrings "d7y.io/dragonfly/v2/pkg/strings"
)
const (
// FilteredQueryParamsSeparator is the separator of filtered query params.
FilteredQueryParamsSeparator = "&"
)
// TaskIDV1 generates v1 version of task id.
// filter is separated by & character.
func TaskIDV1(url string, meta *commonv1.UrlMeta) string {
return taskIDV1(url, meta, false)
}
// ParentTaskIDV1 generates v1 version of parent task id, but without range.
// this func is used to check the parent tasks for ranged requests
func ParentTaskIDV1(url string, meta *commonv1.UrlMeta) string {
return taskIDV1(url, meta, true)
}
// taskIDV1 generates v1 version of task id.
// filter is separated by & character.
func taskIDV1(url string, meta *commonv1.UrlMeta, ignoreRange bool) string {
if meta == nil {
return pkgdigest.SHA256FromStrings(url)
}
filteredQueryParams := parseFilteredQueryParams(meta.Filter)
var (
u string
err error
)
u, err = neturl.FilterQueryParams(url, filteredQueryParams)
if err != nil {
u = ""
}
data := []string{u}
if meta.Digest != "" {
data = append(data, meta.Digest)
}
if !ignoreRange && meta.Range != "" {
data = append(data, meta.Range)
}
if meta.Tag != "" {
data = append(data, meta.Tag)
}
if meta.Application != "" {
data = append(data, meta.Application)
}
return pkgdigest.SHA256FromStrings(data...)
}
// parseFilteredQueryParams parses filtered query params.
func parseFilteredQueryParams(rawFilteredQueryParams string) []string {
if pkgstrings.IsBlank(rawFilteredQueryParams) {
return nil
}
return strings.Split(rawFilteredQueryParams, FilteredQueryParamsSeparator)
}
// TaskIDV2 generates v2 version of task id.
func TaskIDV2(url, digest, tag, application string, pieceLength int32, filteredQueryParams []string) string {
url, err := neturl.FilterQueryParams(url, filteredQueryParams)
if err != nil {
url = ""
}
return pkgdigest.SHA256FromStrings(url, digest, tag, application, fmt.Sprint(pieceLength))
}