[#369] Request reproducer

Signed-off-by: Nikita Zinkevich <n.zinkevich@yadro.com>

cmd/s3-playback/internal/playback/request.go

@@ -0,0 +1,97 @@
+package playback
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"strconv"
+	"strings"
+	"time"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/auth"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/pkg/detector"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/pkg/xmlutils"
+	v4 "github.com/aws/aws-sdk-go-v2/aws/signer/v4"
+	"github.com/aws/aws-sdk-go-v2/credentials"
+)
+
+type (
+	httpBody      []byte
+	LoggedRequest struct {
+		From     string      `json:"from"`
+		URI      string      `json:"URI"`
+		Method   string      `json:"method"`
+		Payload  httpBody    `json:"payload,omitempty"`
+		Response httpBody    `json:"response,omitempty"`
+		Query    url.Values  `json:"query"`
+		Header   http.Header `json:"headers"`
+	}
+	Credentials struct {
+		AccessKey string
+		SecretKey string
+	}
+	Settings struct {
+		Endpoint   string
+		Creds      Credentials
+		Multiparts map[string]MultipartUpload
+		Client     *http.Client
+	}
+)
+
+func (h *httpBody) UnmarshalJSON(data []byte) error {
+	unquoted, err := strconv.Unquote(string(data))
+	if err != nil {
+		return fmt.Errorf("failed to unquote data: %w", err)
+	}
+	detect := detector.NewDetector(strings.NewReader(unquoted), xmlutils.DetectXML)
+	dataType, err := detect.Detect()
+	if err != nil {
+		return fmt.Errorf("failed to detect data: %w", err)
+	}
+	reader := xmlutils.ChooseReader(dataType, detect.RestoredReader())
+	*h, err = io.ReadAll(reader)
+	if err != nil {
+		return fmt.Errorf("failed to unmarshal httpbody: %w", err)
+	}
+
+	return nil
+}
+
+// Sign replace Authorization header with new Access key id and Signature values.
+func Sign(ctx context.Context, r *http.Request, creds Credentials) error {
+	credProvider := credentials.NewStaticCredentialsProvider(creds.AccessKey, creds.SecretKey, "")
+	awsCred, err := credProvider.Retrieve(ctx)
+	if err != nil {
+		return err
+	}
+
+	authHdr := r.Header.Get(auth.AuthorizationHdr)
+	authInfo, err := parseAuthHeader(authHdr)
+	if err != nil {
+		return err
+	}
+	newHeader := strings.Replace(authHdr, authInfo["access_key_id"], creds.AccessKey, 1)
+	r.Header.Set(auth.AuthorizationHdr, newHeader)
+
+	signer := v4.NewSigner()
+	signatureDateTimeStr := r.Header.Get(api.AmzDate)
+	signatureDateTime, err := time.Parse("20060102T150405Z", signatureDateTimeStr)
+	if err != nil {
+		return err
+	}
+
+	return signer.SignHTTP(ctx, awsCred, r, r.Header.Get(api.AmzContentSha256), authInfo["service"], authInfo["region"], signatureDateTime)
+}
+
+func parseAuthHeader(authHeader string) (map[string]string, error) {
+	authInfo := auth.NewRegexpMatcher(auth.AuthorizationFieldRegexp).GetSubmatches(authHeader)
+	if len(authInfo) == 0 {
+		return nil, errors.New("no matches found")
+	}
+
+	return authInfo, nil
+}