go 语言jsontoYAML

/*
Copyright The Helm 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.
*/

// since funcMap is non-importable function, just copy/paste file:)

package template

// nosemgrep: go.lang.security.audit.xss.import-text-template.import-text-template
import (
"bytes"
"encoding/binary"
"encoding/json"
"fmt"
"net"
"strings"
"text/template"

"github.com/BurntSushi/toml"
"github.com/Masterminds/sprig/v3"
"sigs.k8s.io/yaml"
)

// funcMap returns a mapping of all of the functions that Engine has.
func funcMap() template.FuncMap {
f := sprig.TxtFuncMap()
// delete(f, "env")
// delete(f, "expandenv")

// Add some extra functionality
extra := template.FuncMap{
"toToml": toTOML,
"toYaml": toYAML,
"fromYaml": fromYAML,
"fromYamlArray": fromYAMLArray,
"toJson": toJSON,
"fromJson": fromJSON,
"fromJsonArray": fromJSONArray,
"ipNet": ipNet,
"ipAt": ipAt,
}

for k, v := range extra {
f[k] = v
}

return f
}

// toYAML takes an interface, marshals it to yaml, and returns a string. It will
// always return a string, even on marshal error (empty string).
//
// This is designed to be called from a template.
func toYAML(v interface{}) string {
data, err := yaml.Marshal(v)
if err != nil {
// Swallow errors inside of a template.
return ""
}
return strings.TrimSuffix(string(data), "\n")
}

// fromYAML converts a YAML document into a map[string]interface{}.
//
// This is not a general-purpose YAML parser, and will not parse all valid
// YAML documents. Additionally, because its intended use is within templates
// it tolerates errors. It will insert the returned error message string into
// m["Error"] in the returned map.
func fromYAML(str string) map[string]interface{} {
m := map[string]interface{}{}

if err := yaml.Unmarshal([]byte(str), &m); err != nil {
m["Error"] = err.Error()
}
return m
}

// fromYAMLArray converts a YAML array into a []interface{}.
//
// This is not a general-purpose YAML parser, and will not parse all valid
// YAML documents. Additionally, because its intended use is within templates
// it tolerates errors. It will insert the returned error message string as
// the first and only item in the returned array.
func fromYAMLArray(str string) []interface{} {
a := []interface{}{}

if err := yaml.Unmarshal([]byte(str), &a); err != nil {
a = []interface{}{err.Error()}
}
return a
}

// toTOML takes an interface, marshals it to toml, and returns a string. It will
// always return a string, even on marshal error (empty string).
//
// This is designed to be called from a template.
func toTOML(v interface{}) string {
b := bytes.NewBuffer(nil)
e := toml.NewEncoder(b)
if err := e.Encode(v); err != nil {
return err.Error()
}
return b.String()
}

// toJSON takes an interface, marshals it to json, and returns a string. It will
// always return a string, even on marshal error (empty string).
//
// This is designed to be called from a template.
func toJSON(v interface{}) string {
data, err := json.Marshal(v)
if err != nil {
// Swallow errors inside of a template.
return ""
}
return string(data)
}

// fromJSON converts a JSON document into a map[string]interface{}.
//
// This is not a general-purpose JSON parser, and will not parse all valid
// JSON documents. Additionally, because its intended use is within templates
// it tolerates errors. It will insert the returned error message string into
// m["Error"] in the returned map.
func fromJSON(str string) map[string]interface{} {
m := make(map[string]interface{})

if err := json.Unmarshal([]byte(str), &m); err != nil {
m["Error"] = err.Error()
}
return m
}

// fromJSONArray converts a JSON array into a []interface{}.
//
// This is not a general-purpose JSON parser, and will not parse all valid
// JSON documents. Additionally, because its intended use is within templates
// it tolerates errors. It will insert the returned error message string as
// the first and only item in the returned array.
func fromJSONArray(str string) []interface{} {
a := []interface{}{}

if err := json.Unmarshal([]byte(str), &a); err != nil {
a = []interface{}{err.Error()}
}
return a
}

func ipNet(s string) string {
_, ipv4Net, err := net.ParseCIDR(s)
if err != nil {
return fmt.Sprintf("invalid cidr: %s", err)
}
return ipv4Net.String()
}

func ipAt(s string, idx uint32) string {
_, ipv4Net, err := net.ParseCIDR(s)
if err != nil {
return fmt.Sprintf("invalid cidr: %s", err)
}
mask := binary.BigEndian.Uint32(ipv4Net.Mask)
start := binary.BigEndian.Uint32(ipv4Net.IP)
finish := (start & mask) | (mask ^ 0xffffffff)
if start+idx > finish {
return "out of ip address range"
}
ip := make(net.IP, 4)
binary.BigEndian.PutUint32(ip, start+idx)
return ip.String()
}
posted @   技术颜良  阅读(58)  评论(0编辑  收藏  举报
相关博文:
阅读排行:
· CSnakes vs Python.NET:高效嵌入与灵活互通的跨语言方案对比
· DeepSeek “源神”启动!「GitHub 热点速览」
· 我与微信审核的“相爱相杀”看个人小程序副业
· 上周热点回顾(2.17-2.23)
· 如何使用 Uni-app 实现视频聊天(源码,支持安卓、iOS)
历史上的今天:
2021-01-11 shell获取文件名和目录名
2021-01-11 K8S中使用glusterfs
点击右上角即可分享
微信分享提示