isContentAlwaysEmpty() — netty Function Reference

Architecture documentation for the isContentAlwaysEmpty() function in HttpObjectDecoder.java from the netty codebase.

Function java ProtocolCodecs HTTP called by 1

Entity Profile

ProtocolCodecs→ HTTP→ isContentAlwaysEmpty() — netty Function Reference

Dependency Diagram

graph TD
  e296a6f9_cccf_f3cd_2a43_a9281d020f61["isContentAlwaysEmpty()"]
  6c551372_1bb2_fe27_3884_c4cc297c86ae["HttpObjectDecoder"]
  e296a6f9_cccf_f3cd_2a43_a9281d020f61 -->|defined in| 6c551372_1bb2_fe27_3884_c4cc297c86ae
  91c85325_7220_8d93_a39b_91415ca496f4["State()"]
  91c85325_7220_8d93_a39b_91415ca496f4 -->|calls| e296a6f9_cccf_f3cd_2a43_a9281d020f61
  style e296a6f9_cccf_f3cd_2a43_a9281d020f61 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

codec-http/src/main/java/io/netty/handler/codec/http/HttpObjectDecoder.java lines 640–666

    protected boolean isContentAlwaysEmpty(HttpMessage msg) {
        if (msg instanceof HttpResponse) {
            HttpResponse res = (HttpResponse) msg;
            final HttpResponseStatus status = res.status();
            final int code = status.code();
            final HttpStatusClass statusClass = status.codeClass();

            // Correctly handle return codes of 1xx.
            //
            // See:
            //     - https://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html Section 4.4
            //     - https://github.com/netty/netty/issues/222
            if (statusClass == HttpStatusClass.INFORMATIONAL) {
                // One exception: Hixie 76 websocket handshake response
                return !(code == 101 && !res.headers().contains(HttpHeaderNames.SEC_WEBSOCKET_ACCEPT)
                         && res.headers().contains(HttpHeaderNames.UPGRADE, HttpHeaderValues.WEBSOCKET, true));
            }

            switch (code) {
            case 204: case 304:
                return true;
            default:
                return false;
            }
        }
        return false;
    }