[#125] Handle negative Content-Length on put

Add computing actual object size during calculating hash on put.
Use this actual value to save in tree and cache

Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>

api/handler/put_test.go

@@ -1,9 +1,11 @@
 package handler
 
 import (
+	"bytes"
 	"encoding/json"
 	"mime/multipart"
 	"net/http"
+	"strconv"
 	"strings"
 	"testing"
 	"time"
@@ -126,3 +128,21 @@ func TestPutObjectOverrideCopiesNumber(t *testing.T) {
 	require.NoError(t, err)
 	require.Equal(t, "1", objInfo.Headers[layer.AttributeFrostfsCopiesNumber])
 }
+
+func TestPutObjectWithNegativeContentLength(t *testing.T) {
+	tc := prepareHandlerContext(t)
+
+	bktName, objName := "bucket-for-put", "object-for-put"
+	createTestBucket(tc, bktName)
+
+	content := []byte("content")
+	w, r := prepareTestPayloadRequest(tc, bktName, objName, bytes.NewReader(content))
+	r.ContentLength = -1
+	tc.Handler().PutObjectHandler(w, r)
+	assertStatus(t, w, http.StatusOK)
+
+	w, r = prepareTestRequest(tc, bktName, objName, nil)
+	tc.Handler().HeadObjectHandler(w, r)
+	assertStatus(t, w, http.StatusOK)
+	require.Equal(t, strconv.Itoa(len(content)), w.Header().Get(api.ContentLength))
+}