mirror of
https://github.com/gravitational/teleport.git
synced 2026-09-24 16:17:11 +08:00
Alan Parra
a75fcc21d8
Update metalinter, fix a few lint warnings and replace deprecated linters. `deadcode`, `structcheck` and `varcheck` are abandoned and now replaced by [`unused`][1]. Since 1.19, `go fmt` reformats godocs according to https://go.dev/doc/comment. I've done a bulk-reformatting of the codebase to keep the linter happy. Backporting is mostly harmless (the exception being `lib/services/role_test.go`, that for some reason breaks the _old_ linter using the new format). [1]: https://golangci-lint.run/usage/linters/ * Bump golangci-lint version * Replace abandoned linters * Fix bodyclose on lib/auth/github.com * Fix bodyclose on lib/kube/proxy/streamproto/proto_test.go * Fix bodyclose on lib/srv/alpnproxy/proxy_test.go * Fix bodyclose on lib/web/conn_upgrade_test.go * Silence staticcheck on lib/kube/proxy/forwarder_test.go * Silence staticcheck on lib/utils/certs_test.go * Address BuildNameToCertificate deprecation warnings * Run `go fmt ./...` * Run `go fmt ./...` on api/ * Ignore formatting in role_test.go * Remove redundant initializers in lib/srv/uacc/ * Update e/
79 lines
2.1 KiB
Go
79 lines
2.1 KiB
Go
/*
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Copyright 2015 Gravitational, Inc.
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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 utils
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import (
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"bytes"
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"encoding/json"
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"github.com/gravitational/trace"
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)
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// ObjectToStruct is converts any structure into JSON and then unmarshalls it into
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// another structure.
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//
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// Teleport configuration uses this (strange, at first) trick to convert from one
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// struct type to another, if their fields are loosely compatible via their `json` tags
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//
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// Example: assume you have two structs:
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//
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// type A struct {
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// Name string `json:"name"`
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// Age int `json:"age"`
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// }
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//
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// type B struct {
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// FullName string `json:"name"`
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// }
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//
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// Now you can convert B to A:
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//
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// b := &B{ FullName: "Bob Dilan"}
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// var a *A
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// utils.ObjectToStruct(b, &a)
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// fmt.Println(a.Name)
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//
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// > "Bob Dilan"
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func ObjectToStruct(in interface{}, out interface{}) error {
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bytes, err := json.Marshal(in)
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if err != nil {
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return trace.Wrap(err, "failed to marshal %v, %v", in, err)
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}
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if err := json.Unmarshal(bytes, out); err != nil {
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return trace.Wrap(err, "failed to unmarshal %v into %T, %v", in, out, err)
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}
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return nil
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}
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// StrictObjectToStruct converts any structure into JSON and then unmarshalls
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// it into another structure using a strict decoder.
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func StrictObjectToStruct(in interface{}, out interface{}) error {
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data, err := json.Marshal(in)
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if err != nil {
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return trace.Wrap(err, "failed to marshal %v, %v", in, err)
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}
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dec := json.NewDecoder(bytes.NewReader(data))
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dec.DisallowUnknownFields()
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if err := dec.Decode(out); err != nil {
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return trace.Wrap(err, "failed to unmarshal %v into %T, %v", in, out, err)
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}
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return nil
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}
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