3f15326248
Update github.com/aws/aws-sdk-go and github.com/hashicorp/go-discover to pick up support for EC2 Metadata Instance Service v2 changes. Follow up to https://github.com/hashicorp/go-discover/pull/128 .
77 lines
1.6 KiB
Go
77 lines
1.6 KiB
Go
package protocol
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import (
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"encoding/base64"
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"encoding/json"
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"fmt"
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"strconv"
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"github.com/aws/aws-sdk-go/aws"
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)
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// EscapeMode is the mode that should be use for escaping a value
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type EscapeMode uint
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// The modes for escaping a value before it is marshaled, and unmarshaled.
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const (
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NoEscape EscapeMode = iota
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Base64Escape
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QuotedEscape
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)
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// EncodeJSONValue marshals the value into a JSON string, and optionally base64
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// encodes the string before returning it.
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//
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// Will panic if the escape mode is unknown.
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func EncodeJSONValue(v aws.JSONValue, escape EscapeMode) (string, error) {
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b, err := json.Marshal(v)
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if err != nil {
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return "", err
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}
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switch escape {
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case NoEscape:
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return string(b), nil
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case Base64Escape:
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return base64.StdEncoding.EncodeToString(b), nil
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case QuotedEscape:
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return strconv.Quote(string(b)), nil
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}
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panic(fmt.Sprintf("EncodeJSONValue called with unknown EscapeMode, %v", escape))
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}
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// DecodeJSONValue will attempt to decode the string input as a JSONValue.
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// Optionally decoding base64 the value first before JSON unmarshaling.
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//
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// Will panic if the escape mode is unknown.
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func DecodeJSONValue(v string, escape EscapeMode) (aws.JSONValue, error) {
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var b []byte
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var err error
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switch escape {
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case NoEscape:
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b = []byte(v)
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case Base64Escape:
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b, err = base64.StdEncoding.DecodeString(v)
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case QuotedEscape:
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var u string
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u, err = strconv.Unquote(v)
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b = []byte(u)
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default:
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panic(fmt.Sprintf("DecodeJSONValue called with unknown EscapeMode, %v", escape))
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}
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if err != nil {
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return nil, err
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}
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m := aws.JSONValue{}
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err = json.Unmarshal(b, &m)
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if err != nil {
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return nil, err
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}
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return m, nil
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}
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