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// Package senddata provides functionality for injecting data into HTTP responses
package senddata
import (
"encoding/base64"
"encoding/json"
"net/http"
"strings"
)
// Injecter defines the interface for data injection
type Injecter interface {
Match(string) bool
Inject(http.ResponseWriter, *http.Request, string)
Name() string
}
// Prefix represents a prefix for injection
type Prefix string
// Match checks if the given string starts with the prefix
func (p Prefix) Match(s string) bool {
return strings.HasPrefix(s, string(p))
}
// Unpack decodes and unmarshals the sendData string
func (p Prefix) Unpack(result interface{}, sendData string) error {
jsonBytes, err := base64.URLEncoding.DecodeString(strings.TrimPrefix(sendData, string(p)))
if err != nil {
return err
}
if err := json.Unmarshal(jsonBytes, result); err != nil {
return err
}
return nil
}
// Name returns the name of the prefix without the colon suffix
func (p Prefix) Name() string {
return strings.TrimSuffix(string(p), ":")
}
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