private HttpHeadersFrame createHttpHeadersFrame()

in src/main/java/com/twitter/http2/HttpStreamEncoder.java [281:312]

• 20 lines of code
• 2 McCabe index (conditional complexity)

    private HttpHeadersFrame createHttpHeadersFrame(HttpRequest httpRequest)
            throws Exception {
        // Get the Stream-ID from the headers
        int streamId = HttpHeaders.getIntHeader(httpRequest, "X-SPDY-Stream-ID");
        httpRequest.headers().remove("X-SPDY-Stream-ID");

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

        HttpHeadersFrame httpHeadersFrame = new DefaultHttpHeadersFrame(streamId);

        // Unfold the first line of the request into name/value pairs
        httpHeadersFrame.headers().add(":method", httpRequest.getMethod().name());
        httpHeadersFrame.headers().set(":scheme", "https");
        httpHeadersFrame.headers().add(":path", httpRequest.getUri());

        // Replace the HTTP host header with the SPDY host header
        String host = httpRequest.headers().get(HttpHeaders.Names.HOST);
        httpRequest.headers().remove(HttpHeaders.Names.HOST);
        httpHeadersFrame.headers().add(":authority", host);

        // Transfer the remaining HTTP headers
        for (Map.Entry<String, String> entry : httpRequest.headers()) {
            httpHeadersFrame.headers().add(entry.getKey(), entry.getValue());
        }

        return httpHeadersFrame;
    }