SpdyHeadersFrame() — netty Function Reference

Architecture documentation for the SpdyHeadersFrame() function in SpdyHttpEncoder.java from the netty codebase.

Function java Buffer Allocators calls 1

Entity Profile

Buffer→ Allocators→ SpdyHeadersFrame() — netty Function Reference

Dependency Diagram

graph TD
  0aeff057_9424_398d_c320_e72e9d1c434b["SpdyHeadersFrame()"]
  18ed3381_f0b5_3753_fac7_fb58d0f9ddbb["SpdyHttpEncoder"]
  0aeff057_9424_398d_c320_e72e9d1c434b -->|defined in| 18ed3381_f0b5_3753_fac7_fb58d0f9ddbb
  4b3a9241_a033_6042_cea3_ac272e0a6928["isLast()"]
  0aeff057_9424_398d_c320_e72e9d1c434b -->|calls| 4b3a9241_a033_6042_cea3_ac272e0a6928
  style 0aeff057_9424_398d_c320_e72e9d1c434b fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

codec-http/src/main/java/io/netty/handler/codec/spdy/SpdyHttpEncoder.java lines 276–314

    @SuppressWarnings("deprecation")
    private SpdyHeadersFrame createHeadersFrame(HttpResponse httpResponse) throws Exception {
        // Get the Stream-ID from the headers
        final HttpHeaders httpHeaders = httpResponse.headers();
        int streamId = httpHeaders.getInt(SpdyHttpHeaders.Names.STREAM_ID);
        httpHeaders.remove(SpdyHttpHeaders.Names.STREAM_ID);

        // The Connection, Keep-Alive, Proxy-Connection, and Transfer-Encoding
        // headers are not valid and MUST not be sent.
        httpHeaders.remove(HttpHeaderNames.CONNECTION);
        httpHeaders.remove("Keep-Alive");
        httpHeaders.remove("Proxy-Connection");
        httpHeaders.remove(HttpHeaderNames.TRANSFER_ENCODING);

        SpdyHeadersFrame spdyHeadersFrame;
        if (SpdyCodecUtil.isServerId(streamId)) {
            spdyHeadersFrame = new DefaultSpdyHeadersFrame(streamId, validateHeaders);
        } else {
            spdyHeadersFrame = new DefaultSpdySynReplyFrame(streamId, validateHeaders);
        }
        SpdyHeaders frameHeaders = spdyHeadersFrame.headers();
        // Unfold the first line of the response into name/value pairs
        frameHeaders.set(SpdyHeaders.HttpNames.STATUS, httpResponse.status().codeAsText());
        frameHeaders.set(SpdyHeaders.HttpNames.VERSION, httpResponse.protocolVersion().text());

        // Transfer the remaining HTTP headers
        Iterator<Entry<CharSequence, CharSequence>> itr = httpHeaders.iteratorCharSequence();
        while (itr.hasNext()) {
            Map.Entry<CharSequence, CharSequence> entry = itr.next();
            final CharSequence headerName =
                    headersToLowerCase ? AsciiString.of(entry.getKey()).toLowerCase() : entry.getKey();
            spdyHeadersFrame.headers().add(headerName, entry.getValue());
        }

        currentStreamId = streamId;
        spdyHeadersFrame.setLast(isLast(httpResponse));

        return spdyHeadersFrame;
    }