normalize header keys

header.go

@@ -3,7 +3,9 @@ package gortsplib
 import (
 	"bufio"
 	"fmt"
+	"net/http"
 	"sort"
+	"strings"
 )
 
 const (
@@ -12,6 +14,20 @@ const (
 	_MAX_HEADER_VALUE_LENGTH = 1024
 )
 
+func normalizeHeaderKey(in string) string {
+	switch strings.ToLower(in) {
+	case "rtp-info":
+		return "RTP-INFO"
+
+	case "www-authenticate":
+		return "WWW-Authenticate"
+
+	case "cseq":
+		return "CSeq"
+	}
+	return http.CanonicalHeaderKey(in)
+}
+
 // Header is a RTSP reader, present in both Requests and Responses.
 type Header map[string][]string
 
@@ -43,6 +59,7 @@ func readHeader(rb *bufio.Reader) (Header, error) {
 			return nil, err
 		}
 		key += string(byts[:len(byts)-1])
+		key = normalizeHeaderKey(key)
 
 		err = readByteEqual(rb, ' ')
 		if err != nil {

header_test.go

@@ -59,3 +59,40 @@ func TestHeaderWrite(t *testing.T) {
 		})
 	}
 }
+
+var casesHeaderNormalization = []struct {
+	name   string
+	byts   []byte
+	header Header
+}{
+	{
+		"standard",
+		[]byte("Content-type: testing\r\n" +
+			"Content-length: value\r\n" +
+			"\r\n"),
+		Header{
+			"Content-Type":   []string{"testing"},
+			"Content-Length": []string{"value"},
+		},
+	},
+	{
+		"non-standard",
+		[]byte("Www-Authenticate: value\r\n" +
+			"Cseq: value\r\n" +
+			"\r\n"),
+		Header{
+			"WWW-Authenticate": []string{"value"},
+			"CSeq":             []string{"value"},
+		},
+	},
+}
+
+func TestHeaderNormalization(t *testing.T) {
+	for _, c := range casesHeaderNormalization {
+		t.Run(c.name, func(t *testing.T) {
+			req, err := readHeader(bufio.NewReader(bytes.NewBuffer(c.byts)))
+			require.NoError(t, err)
+			require.Equal(t, c.header, req)
+		})
+	}
+}