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[#146] Fix preconditions: trim quotes in etags 

Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>
pull/167/head
Denis Kirillov 2023-07-10 09:59:12 +03:00
parent 751a9be7cc
commit d62aa7b979
3 changed files with 26 additions and 7 deletions
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19
api/handler/get.go
View File

@ -231,17 +231,24 @@ func (h *handler) GetObjectHandler(w http.ResponseWriter, r *http.Request) {
func checkPreconditions(info *data.ObjectInfo, args *conditionalArgs) error {
if len(args.IfMatch) > 0 && args.IfMatch != info.HashSum {
return errors.GetAPIError(errors.ErrPreconditionFailed)
return fmt.Errorf("%w: etag mismatched: '%s', '%s'", errors.GetAPIError(errors.ErrPreconditionFailed), args.IfMatch, info.HashSum)
}
if len(args.IfNoneMatch) > 0 && args.IfNoneMatch == info.HashSum {
return errors.GetAPIError(errors.ErrNotModified)
return fmt.Errorf("%w: etag matched: '%s', '%s'", errors.GetAPIError(errors.ErrNotModified), args.IfNoneMatch, info.HashSum)
}
if args.IfModifiedSince != nil && info.Created.Before(*args.IfModifiedSince) {
return errors.GetAPIError(errors.ErrNotModified)
return fmt.Errorf("%w: not modified since '%s', last modified '%s'", errors.GetAPIError(errors.ErrNotModified),
args.IfModifiedSince.Format(time.RFC3339), info.Created.Format(time.RFC3339))
}
if args.IfUnmodifiedSince != nil && info.Created.After(*args.IfUnmodifiedSince) {
// https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetObject.html#API_GetObject_RequestSyntax
// If both of the If-Match and If-Unmodified-Since headers are present in the request as follows:
// If-Match condition evaluates to true, and;
// If-Unmodified-Since condition evaluates to false;
// then, S3 returns 200 OK and the data requested.
if len(args.IfMatch) == 0 {
return errors.GetAPIError(errors.ErrPreconditionFailed)
return fmt.Errorf("%w: modified since '%s', last modified '%s'", errors.GetAPIError(errors.ErrPreconditionFailed),
args.IfUnmodifiedSince.Format(time.RFC3339), info.Created.Format(time.RFC3339))
}
}
@ -251,8 +258,8 @@ func checkPreconditions(info *data.ObjectInfo, args *conditionalArgs) error {
func parseConditionalHeaders(headers http.Header) (*conditionalArgs, error) {
var err error
args := &conditionalArgs{
IfMatch: headers.Get(api.IfMatch),
IfNoneMatch: headers.Get(api.IfNoneMatch),
IfMatch: strings.Trim(headers.Get(api.IfMatch), "\""),
IfNoneMatch: strings.Trim(headers.Get(api.IfNoneMatch), "\""),
}
if args.IfModifiedSince, err = parseHTTPTime(headers.Get(api.IfModifiedSince)); err != nil {

7
api/handler/get_test.go
View File

@ -2,6 +2,7 @@ package handler
import (
"bytes"
stderrors "errors"
"fmt"
"io"
"net/http"
@ -149,7 +150,11 @@ func TestPreconditions(t *testing.T) {
} {
t.Run(tc.name, func(t *testing.T) {
actual := checkPreconditions(tc.info, tc.args)
require.Equal(t, tc.expected, actual)
if tc.expected == nil {
require.NoError(t, actual)
} else {
require.True(t, stderrors.Is(actual, tc.expected), tc.expected, actual)
}
})
}
}

7
api/handler/head_test.go
View File

@ -27,10 +27,14 @@ func TestConditionalHead(t *testing.T) {
tc.Handler().HeadObjectHandler(w, r)
assertStatus(t, w, http.StatusOK)
etag := w.Result().Header.Get(api.ETag)
etagQuoted := "\"" + etag + "\""
headers := map[string]string{api.IfMatch: etag}
headObject(t, tc, bktName, objName, headers, http.StatusOK)
headers = map[string]string{api.IfMatch: etagQuoted}
headObject(t, tc, bktName, objName, headers, http.StatusOK)
headers = map[string]string{api.IfMatch: "etag"}
headObject(t, tc, bktName, objName, headers, http.StatusPreconditionFailed)
@ -50,6 +54,9 @@ func TestConditionalHead(t *testing.T) {
headers = map[string]string{api.IfNoneMatch: etag}
headObject(t, tc, bktName, objName, headers, http.StatusNotModified)
headers = map[string]string{api.IfNoneMatch: etagQuoted}
headObject(t, tc, bktName, objName, headers, http.StatusNotModified)
headers = map[string]string{api.IfNoneMatch: "etag"}
headObject(t, tc, bktName, objName, headers, http.StatusOK)