jsonrpc2: fix Content-Length header parsing to be case-insensitive

nithinputhenveettil · maciej-kisiel · commit 23ab1bfd26c8 · 2026-02-16T12:20:41.000+01:00
diff --git a/internal/jsonrpc2/frame.go b/internal/jsonrpc2/frame.go
@@ -163,8 +163,8 @@ func (r *headerReader) Read(ctx context.Context) (Message, error) {
 			return nil, fmt.Errorf("invalid header line %q", line)
 		}
 		name, value := line[:colon], strings.TrimSpace(line[colon+1:])
-		switch name {
-		case "Content-Length":
+		switch {
+		case strings.EqualFold(name, "Content-Length"):
 			if contentLength, err = strconv.ParseInt(value, 10, 32); err != nil {
 				return nil, fmt.Errorf("failed parsing Content-Length: %v", value)
 			}

Original file line number	Diff line number	Diff line change
`@@ -163,8 +163,8 @@ func (r *headerReader) Read(ctx context.Context) (Message, error) {`
`163`	`163`	`return nil, fmt.Errorf("invalid header line %q", line)`
`164`	`164`	`}`
`165`	`165`	`name, value := line[:colon], strings.TrimSpace(line[colon+1:])`
`166`		`- switch name {`
`167`		`- case "Content-Length":`
	`166`	`+ switch {`
	`167`	`+ case strings.EqualFold(name, "Content-Length"):`
`168`	`168`	`if contentLength, err = strconv.ParseInt(value, 10, 32); err != nil {`
`169`	`169`	`return nil, fmt.Errorf("failed parsing Content-Length: %v", value)`
`170`	`170`	`}`