forked from TrueCloudLab/frostfs-http-gw
91 lines
1.9 KiB
Go
91 lines
1.9 KiB
Go
package main
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/base64"
|
|
|
|
"github.com/nspcc-dev/neofs-api-go/pkg/token"
|
|
"github.com/pkg/errors"
|
|
"github.com/valyala/fasthttp"
|
|
)
|
|
|
|
type fromHandler = func(h *fasthttp.RequestHeader) []byte
|
|
|
|
const (
|
|
bearerTokenHdr = "Bearer"
|
|
bearerTokenKey = "__context_bearer_token_key"
|
|
)
|
|
|
|
// BearerToken usage:
|
|
//
|
|
// if err = checkAndPropagateBearerToken(ctx); err != nil {
|
|
// log.Error("could not fetch bearer token", zap.Error(err))
|
|
// c.Error("could not fetch bearer token", fasthttp.StatusBadRequest)
|
|
// return
|
|
// }
|
|
|
|
func fromHeader(h *fasthttp.RequestHeader) []byte {
|
|
auth := h.Peek(fasthttp.HeaderAuthorization)
|
|
if auth == nil || !bytes.HasPrefix(auth, []byte(bearerTokenHdr)) {
|
|
return nil
|
|
}
|
|
|
|
if auth = bytes.TrimPrefix(auth, []byte(bearerTokenHdr+" ")); len(auth) == 0 {
|
|
return nil
|
|
}
|
|
|
|
return auth
|
|
}
|
|
|
|
func fromCookie(h *fasthttp.RequestHeader) []byte {
|
|
auth := h.Cookie(bearerTokenHdr)
|
|
if len(auth) == 0 {
|
|
return nil
|
|
}
|
|
|
|
return auth
|
|
}
|
|
|
|
func checkAndPropagateBearerToken(ctx *fasthttp.RequestCtx) error {
|
|
tkn, err := fetchBearerToken(ctx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// This is an analog of context.WithValue.
|
|
ctx.SetUserValue(bearerTokenKey, tkn)
|
|
|
|
return nil
|
|
}
|
|
|
|
func fetchBearerToken(ctx *fasthttp.RequestCtx) (*token.BearerToken, error) {
|
|
// ignore empty value
|
|
if ctx == nil {
|
|
return nil, nil
|
|
}
|
|
|
|
var (
|
|
lastErr error
|
|
|
|
buf []byte
|
|
tkn = new(token.BearerToken)
|
|
)
|
|
|
|
for _, parse := range []fromHandler{fromHeader, fromCookie} {
|
|
if buf = parse(&ctx.Request.Header); buf == nil {
|
|
continue
|
|
} else if data, err := base64.StdEncoding.DecodeString(string(buf)); err != nil {
|
|
lastErr = errors.Wrap(err, "could not fetch marshaled from base64")
|
|
continue
|
|
} else if err = tkn.Unmarshal(data); err != nil {
|
|
lastErr = errors.Wrap(err, "could not unmarshal bearer token")
|
|
continue
|
|
} else if tkn == nil {
|
|
continue
|
|
}
|
|
|
|
return tkn, nil
|
|
}
|
|
|
|
return nil, lastErr
|
|
}
|