mirror of
https://github.com/gofiber/fiber.git
synced 2025-07-11 13:08:04 +00:00
62 lines
1.3 KiB
Go
62 lines
1.3 KiB
Go
package envvar
|
|
|
|
import (
|
|
"os"
|
|
|
|
"github.com/gofiber/fiber/v3"
|
|
)
|
|
|
|
// Config defines the config for middleware.
|
|
type Config struct {
|
|
// ExportVars specifies the environment variables that should export
|
|
ExportVars map[string]string
|
|
}
|
|
|
|
type EnvVar struct {
|
|
Vars map[string]string `json:"vars"`
|
|
}
|
|
|
|
func (envVar *EnvVar) set(key, val string) {
|
|
envVar.Vars[key] = val
|
|
}
|
|
|
|
func New(config ...Config) fiber.Handler {
|
|
var cfg Config
|
|
if len(config) > 0 {
|
|
cfg = config[0]
|
|
}
|
|
|
|
return func(c fiber.Ctx) error {
|
|
if c.Method() != fiber.MethodGet {
|
|
return fiber.ErrMethodNotAllowed
|
|
}
|
|
|
|
envVar := newEnvVar(cfg)
|
|
varsByte, err := c.App().Config().JSONEncoder(envVar)
|
|
if err != nil {
|
|
return c.Status(fiber.StatusInternalServerError).SendString(err.Error())
|
|
}
|
|
c.Set(fiber.HeaderContentType, fiber.MIMEApplicationJSONCharsetUTF8)
|
|
return c.Send(varsByte)
|
|
}
|
|
}
|
|
|
|
func newEnvVar(cfg Config) *EnvVar {
|
|
vars := &EnvVar{Vars: make(map[string]string)}
|
|
|
|
if len(cfg.ExportVars) == 0 {
|
|
// do not expose environment variables when no configuration
|
|
// is supplied to prevent accidental information disclosure
|
|
return vars
|
|
}
|
|
|
|
for key, defaultVal := range cfg.ExportVars {
|
|
vars.set(key, defaultVal)
|
|
if envVal, exists := os.LookupEnv(key); exists {
|
|
vars.set(key, envVal)
|
|
}
|
|
}
|
|
|
|
return vars
|
|
}
|