func extractMetadataFromReq(ctx context.Context, r *http.Request) (metadata map[string]string, err error) {
	return extractMetadata(ctx, textproto.MIMEHeader(r.Form), textproto.MIMEHeader(r.Header))
}

func extractMetadata(ctx context.Context, mimesHeader ...textproto.MIMEHeader) (metadata map[string]string, err error) {
	metadata = make(map[string]string)

	for _, hdr := range mimesHeader {
		// Extract all query values.

			shouldFail: true,
		},
	}

	// Validate if the extracting headers.
	for i, testCase := range testCases {
		metadata := make(map[string]string)
		err := extractMetadataFromMime(t.Context(), textproto.MIMEHeader(testCase.header), metadata)
		if err != nil && !testCase.shouldFail {
			t.Fatalf("Test %d failed to extract metadata: %v", i+1, err)
		}
		if err == nil && testCase.shouldFail {

pkg net/http, type Cookie struct, SameSite SameSite
pkg net/http, type SameSite int
pkg net/http, type Transport struct, MaxConnsPerHost int
pkg net/http/httptrace, type ClientTrace struct, Got1xxResponse func(int, textproto.MIMEHeader) error
pkg net/http/httptrace, type ClientTrace struct, WroteHeaderField func(string, []string)
pkg net/http/httputil, type ReverseProxy struct, ErrorHandler func(http.ResponseWriter, *http.Request, error)

			hashReader.SetExpectedMax(lengthRange.Max)
		}
	}

	// Extract metadata to be saved from received Form.
	metadata := make(map[string]string)
	err = extractMetadataFromMime(ctx, textproto.MIMEHeader(formValues), metadata)
	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	rawReader := hashReader
	pReader := NewPutObjReader(rawReader)

					continue
				}
				if after, ok0 := strings.CutPrefix(k, "minio.metadata."); ok0 {
					k = after
					hdrs.Set(k, v)
				}
			}
			m, err := extractMetadata(ctx, textproto.MIMEHeader(hdrs))
			if err != nil {
				return err
			}
			maps.Copy(metadata, m)
		} else {
			versionID = r.Form.Get(xhttp.VersionID)
			hdrs = r.Header
		}

pkg net/textproto, method (*Reader) ReadMIMEHeader() (MIMEHeader, error)
pkg net/textproto, method (*Reader) ReadResponse(int) (int, string, error)
pkg net/textproto, method (*Writer) DotWriter() io.WriteCloser
pkg net/textproto, method (*Writer) PrintfLine(string, ...interface{}) error
pkg net/textproto, method (MIMEHeader) Add(string, string)
pkg net/textproto, method (MIMEHeader) Del(string)

pkg net/http, type Transport struct, DialTLSContext func(context.Context, string, string) (net.Conn, error)
pkg net/http/httptest, type Server struct, EnableHTTP2 bool
pkg net/textproto, method (MIMEHeader) Values(string) []string
pkg strconv, method (*NumError) Unwrap() error
pkg syscall (windows-386), const CTRL_CLOSE_EVENT = 2
pkg syscall (windows-386), const CTRL_CLOSE_EVENT ideal-int