/* ------------------------------------------------------------ */
public Result generateResponse(
MetaData.Response info,
boolean head,
ByteBuffer header,
ByteBuffer chunk,
ByteBuffer content,
boolean last)
throws IOException {
switch (_state) {
case START:
{
if (info == null) return Result.NEED_INFO;
// Handle 0.9
if (info.getVersion() == HttpVersion.HTTP_0_9) {
_persistent = false;
_endOfContent = EndOfContent.EOF_CONTENT;
if (BufferUtil.hasContent(content)) _contentPrepared += content.remaining();
_state = last ? State.COMPLETING : State.COMMITTED;
return Result.FLUSH;
}
// Do we need a response header
if (header == null) return Result.NEED_HEADER;
// If we have not been told our persistence, set the default
if (_persistent == null)
_persistent = (info.getVersion().ordinal() > HttpVersion.HTTP_1_0.ordinal());
// prepare the header
int pos = BufferUtil.flipToFill(header);
try {
// generate ResponseLine
generateResponseLine(info, header);
// Handle 1xx and no content responses
int status = info.getStatus();
if (status >= 100 && status < 200) {
_noContent = true;
if (status != HttpStatus.SWITCHING_PROTOCOLS_101) {
header.put(HttpTokens.CRLF);
_state = State.COMPLETING_1XX;
return Result.FLUSH;
}
} else if (status == HttpStatus.NO_CONTENT_204
|| status == HttpStatus.NOT_MODIFIED_304) {
_noContent = true;
}
generateHeaders(info, header, content, last);
// handle the content.
int len = BufferUtil.length(content);
if (len > 0) {
_contentPrepared += len;
if (isChunking() && !head) prepareChunk(header, len);
}
_state = last ? State.COMPLETING : State.COMMITTED;
} catch (Exception e) {
String message =
(e instanceof BufferOverflowException)
? "Response header too large"
: e.getMessage();
throw new IOException(message, e);
} finally {
BufferUtil.flipToFlush(header, pos);
}
return Result.FLUSH;
}
case COMMITTED:
{
int len = BufferUtil.length(content);
// handle the content.
if (len > 0) {
if (isChunking()) {
if (chunk == null) return Result.NEED_CHUNK;
BufferUtil.clearToFill(chunk);
prepareChunk(chunk, len);
BufferUtil.flipToFlush(chunk, 0);
}
_contentPrepared += len;
}
if (last) {
_state = State.COMPLETING;
return len > 0 ? Result.FLUSH : Result.CONTINUE;
}
return len > 0 ? Result.FLUSH : Result.DONE;
}
case COMPLETING_1XX:
{
reset();
return Result.DONE;
}
case COMPLETING:
{
if (BufferUtil.hasContent(content)) {
if (LOG.isDebugEnabled()) LOG.debug("discarding content in COMPLETING");
BufferUtil.clear(content);
}
if (isChunking()) {
// Do we need a chunk buffer?
if (chunk == null) return Result.NEED_CHUNK;
// Write the last chunk
BufferUtil.clearToFill(chunk);
prepareChunk(chunk, 0);
BufferUtil.flipToFlush(chunk, 0);
_endOfContent = EndOfContent.UNKNOWN_CONTENT;
return Result.FLUSH;
}
_state = State.END;
return Boolean.TRUE.equals(_persistent) ? Result.DONE : Result.SHUTDOWN_OUT;
}
case END:
if (BufferUtil.hasContent(content)) {
if (LOG.isDebugEnabled()) LOG.debug("discarding content in COMPLETING");
BufferUtil.clear(content);
}
return Result.DONE;
default:
throw new IllegalStateException();
}
}
