138 lines
3.5 KiB
Go
138 lines
3.5 KiB
Go
/*
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Copyright 2019 The KubeSphere Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 params
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import (
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"fmt"
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"regexp"
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"strconv"
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"strings"
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restful "github.com/emicklei/go-restful"
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)
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const (
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PagingParam = "paging"
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OrderByParam = "orderBy"
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ConditionsParam = "conditions"
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ReverseParam = "reverse"
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)
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const (
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DefaultLimit = 10
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DefaultPage = 1
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)
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// ParsePaging parse the paging parameters from the request, then returns the limit and offset
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// supported format: ?limit=1&page=1
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// supported format: ?paging=limit=100,page=1
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func ParsePaging(req *restful.Request) (limit, offset int) {
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paging := req.QueryParameter(PagingParam)
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limit = 10
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page := DefaultPage
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if paging != "" {
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if groups := regexp.MustCompile(`^limit=(-?\d+),page=(\d+)$`).FindStringSubmatch(paging); len(groups) == 3 {
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limit = AtoiOrDefault(groups[1], DefaultLimit)
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page = AtoiOrDefault(groups[2], DefaultPage)
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}
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} else {
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// try to parse from format ?limit=10&page=1
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limit = AtoiOrDefault(req.QueryParameter("limit"), DefaultLimit)
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page = AtoiOrDefault(req.QueryParameter("page"), DefaultPage)
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}
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offset = (page - 1) * limit
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// use the explict offset
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if start := req.QueryParameter("start"); start != "" {
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offset = AtoiOrDefault(start, offset)
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}
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return
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}
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func AtoiOrDefault(str string, defVal int) int {
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if result, err := strconv.Atoi(str); err == nil {
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return result
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}
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return defVal
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}
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var (
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invalidKeyRegex = regexp.MustCompile(`[\s(){}\[\]]`)
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)
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// Ref: stdlib url.ParseQuery
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func parseConditions(conditionsStr string) (*Conditions, error) {
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// string likes: key1=value1,key2~value2,key3=
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// exact query: key=value, if value is empty means label value must be ""
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// fuzzy query: key~value, if value is empty means label value is "" or label key not exist
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var conditions = &Conditions{Match: make(map[string]string, 0), Fuzzy: make(map[string]string, 0)}
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for conditionsStr != "" {
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key := conditionsStr
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if i := strings.Index(key, ","); i >= 0 {
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key, conditionsStr = key[:i], key[i+1:]
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} else {
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conditionsStr = ""
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}
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if key == "" {
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continue
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}
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value := ""
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var isFuzzy = false
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if i := strings.IndexAny(key, "~="); i >= 0 {
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if key[i] == '~' {
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isFuzzy = true
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}
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key, value = key[:i], key[i+1:]
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}
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if invalidKeyRegex.MatchString(key) {
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return nil, fmt.Errorf("invalid conditions")
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}
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if isFuzzy {
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conditions.Fuzzy[key] = value
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} else {
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conditions.Match[key] = value
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}
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}
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return conditions, nil
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}
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func ParseConditions(req *restful.Request) (*Conditions, error) {
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return parseConditions(req.QueryParameter(ConditionsParam))
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}
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type Conditions struct {
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Match map[string]string
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Fuzzy map[string]string
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}
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func GetBoolValueWithDefault(req *restful.Request, name string, dv bool) bool {
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reverse := req.QueryParameter(name)
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if v, err := strconv.ParseBool(reverse); err == nil {
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return v
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}
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return dv
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}
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func GetStringValueWithDefault(req *restful.Request, name string, dv string) string {
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v := req.QueryParameter(name)
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if v == "" {
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v = dv
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}
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return v
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}
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