How to realize yaml to map and map traversal in go language
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Yaml file content
ApiVersion: policy/v1beta1kind: PodSecurityPolicymetadata: name: mysql-snapshotspec: privileged: false allowPrivilegeEscalation: false volumes:-"*" hostNetwork: false hostIPC: false hostPID: false runAsUser: rule: RunAsAny seLinux: rule: RunAsAny supplementalGroups: rule: RunAsAny fsGroup: rule: RunAsAny
Sample code: implementation of base64 codec, yaml to map, and map traversal
Func main () {f, err: = os.Open ("cmd/test.yaml") if err! = nil {log.Fatalln (err) return} input, _: = ioutil.ReadAll (f) / / base64 Encoding encodeString: = base64.StdEncoding.EncodeToString (input) fmt.Println (encodeString) / / base64 Decoding decodeBytes Err: = base64.StdEncoding.DecodeString (encodeString) if err! = nil {log.Fatalln (err)} / / yaml file content converted to map [interface {}] interface {}) resultMap: = make (map [interface {}] interface {}) if err: = yaml.Unmarshal (decodeBytes, & resultMap) Err! = nil {/ / error handling log.Fatalln (err)} / / traversing map Take the metadata.name value for key, value: = range resultMap {switch key: = key. (type) {case string: if key = = "metadata" {switch value: = value. (type) {case string: case map [interface {}] interface {}: for k, v: = range value {switch k. (type) {case string: if k = = "name" {fmt.Println ("value=") V)}}
Result
EncodeString = "YXBpVmVyc2lvbjogcG9saWN5L3YxYmV0YTEKa2luZDogUG9kU2VjdXJpdHlQb2xpY3kKbWV0YWRhdGE6CiAgbmFtZTogbXlzcWwtc25hcHNob3QKc3BlYzogCiAgcHJpdmlsZWdlZDogZmFsc2UKICBhbGxvd1ByaXZpbGVnZUVzY2FsYXRpb246IGZhbHNlCiAgdm9sdW1lczoKICAtICIqIgogIGhvc3ROZXR3b3JrOiBmYWxzZQogIGhvc3RJUEM6IGZhbHNlCiAgaG9zdFBJRDogZmFsc2UKICBydW5Bc1VzZXI6CiAgICBydWxlOiBSdW5Bc0FueQogIHNlTGludXg6CiAgICBydWxlOiBSdW5Bc0FueQogIHN1cHBsZW1lbnRhbEdyb3VwczoKICAgIHJ1bGU6IFJ1bkFzQW55CiAgZnNHcm91cDoKICAgIHJ1bGU6IFJ1bkFzQW55Cg=="
Value=mysql-snapshot
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