frostfs-http-gw/downloader/head.go

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package downloader
import (
"net/http"
"strconv"
"time"
"github.com/nspcc-dev/neofs-http-gw/response"
"github.com/nspcc-dev/neofs-http-gw/tokens"
"github.com/nspcc-dev/neofs-http-gw/utils"
"github.com/nspcc-dev/neofs-sdk-go/client"
"github.com/nspcc-dev/neofs-sdk-go/object"
"github.com/nspcc-dev/neofs-sdk-go/pool"
"github.com/valyala/fasthttp"
"go.uber.org/zap"
)
const sizeToDetectType = 512
func (r request) headObject(clnt pool.Object, objectAddress *object.Address) {
var start = time.Now()
if err := tokens.StoreBearerToken(r.RequestCtx); err != nil {
r.log.Error("could not fetch and store bearer token", zap.Error(err))
response.Error(r.RequestCtx, "could not fetch and store bearer token", fasthttp.StatusBadRequest)
return
}
options := new(client.ObjectHeaderParams).WithAddress(objectAddress)
bearerOpt := bearerOpts(r.RequestCtx)
obj, err := clnt.GetObjectHeader(r.RequestCtx, options, bearerOpt)
if err != nil {
r.handleNeoFSErr(err, start)
return
}
r.Response.Header.Set("Content-Length", strconv.FormatUint(obj.PayloadSize(), 10))
var contentType string
for _, attr := range obj.Attributes() {
key := attr.Key()
val := attr.Value()
if !isValidToken(key) || !isValidValue(val) {
continue
}
r.Response.Header.Set(utils.UserAttributeHeaderPrefix+key, val)
switch key {
case object.AttributeTimestamp:
value, err := strconv.ParseInt(val, 10, 64)
if err != nil {
r.log.Info("couldn't parse creation date",
zap.String("key", key),
zap.String("val", val),
zap.Error(err))
continue
}
r.Response.Header.Set("Last-Modified", time.Unix(value, 0).UTC().Format(http.TimeFormat))
case object.AttributeContentType:
contentType = val
}
}
r.Response.Header.Set("x-object-id", obj.ID().String())
r.Response.Header.Set("x-owner-id", obj.OwnerID().String())
r.Response.Header.Set("x-container-id", obj.ContainerID().String())
if len(contentType) == 0 {
objRange := object.NewRange()
objRange.SetOffset(0)
if sizeToDetectType < obj.PayloadSize() {
objRange.SetLength(sizeToDetectType)
} else {
objRange.SetLength(obj.PayloadSize())
}
ops := new(client.RangeDataParams).WithAddress(objectAddress).WithRange(objRange)
data, err := clnt.ObjectPayloadRangeData(r.RequestCtx, ops, bearerOpt)
if err != nil {
r.handleNeoFSErr(err, start)
return
}
contentType = http.DetectContentType(data)
}
r.SetContentType(contentType)
}
// HeadByAddress handles head requests using simple cid/oid format.
func (d *Downloader) HeadByAddress(c *fasthttp.RequestCtx) {
d.byAddress(c, request.headObject)
}
// HeadByAttribute handles attribute-based head requests.
func (d *Downloader) HeadByAttribute(c *fasthttp.RequestCtx) {
d.byAttribute(c, request.headObject)
}