public HttpField(String name, String value) {
this(HttpHeader.CACHE.get(name), name, value);
}
/*
* Parse the message headers and return true if the handler has signaled for a return
*/
protected boolean parseHeaders(ByteBuffer buffer) {
boolean handle = false;
// Process headers
while (_state.ordinal() < State.CONTENT.ordinal() && buffer.hasRemaining() && !handle) {
// process each character
byte ch = next(buffer);
if (ch == 0) break;
if (_maxHeaderBytes > 0 && ++_headerBytes > _maxHeaderBytes) {
LOG.warn("Header is too large >" + _maxHeaderBytes);
throw new BadMessage(HttpStatus.REQUEST_ENTITY_TOO_LARGE_413);
}
switch (_state) {
case HEADER:
switch (ch) {
case HttpTokens.COLON:
case HttpTokens.SPACE:
case HttpTokens.TAB:
{
// header value without name - continuation?
if (_valueString == null) {
_string.setLength(0);
_length = 0;
} else {
setString(_valueString);
_string.append(' ');
_length++;
_valueString = null;
}
setState(State.HEADER_VALUE);
break;
}
default:
{
// handler last header if any. Delayed to here just in case there was a
// continuation line (above)
if (_headerString != null || _valueString != null) {
// Handle known headers
if (_header != null && handleKnownHeaders(buffer)) {
_headerString = _valueString = null;
_header = null;
_value = null;
_field = null;
return true;
}
handle =
_handler.parsedHeader(
_field != null
? _field
: new HttpField(_header, _headerString, _valueString))
|| handle;
}
_headerString = _valueString = null;
_header = null;
_value = null;
_field = null;
// now handle the ch
if (ch == HttpTokens.LINE_FEED) {
_contentPosition = 0;
// End of headers!
// Was there a required host header?
if (!_host && _version != HttpVersion.HTTP_1_0 && _requestHandler != null) {
throw new BadMessage(HttpStatus.BAD_REQUEST_400, "No Host");
}
// is it a response that cannot have a body?
if (_responseHandler != null
&& // response
(_responseStatus == 304
|| // not-modified response
_responseStatus == 204
|| // no-content response
_responseStatus < 200)) // 1xx response
_endOfContent = EndOfContent.NO_CONTENT; // ignore any other headers set
// else if we don't know framing
else if (_endOfContent == EndOfContent.UNKNOWN_CONTENT) {
if (_responseStatus == 0 // request
|| _responseStatus == 304 // not-modified response
|| _responseStatus == 204 // no-content response
|| _responseStatus < 200) // 1xx response
_endOfContent = EndOfContent.NO_CONTENT;
else _endOfContent = EndOfContent.EOF_CONTENT;
}
// How is the message ended?
switch (_endOfContent) {
case EOF_CONTENT:
setState(State.EOF_CONTENT);
handle = _handler.headerComplete() || handle;
break;
case CHUNKED_CONTENT:
setState(State.CHUNKED_CONTENT);
handle = _handler.headerComplete() || handle;
break;
case NO_CONTENT:
handle = _handler.headerComplete() || handle;
setState(State.END);
handle = _handler.messageComplete() || handle;
break;
default:
setState(State.CONTENT);
handle = _handler.headerComplete() || handle;
break;
}
} else if (ch <= HttpTokens.SPACE) throw new BadMessage();
else {
if (buffer.hasRemaining()) {
// Try a look ahead for the known header name and value.
HttpField field =
_connectionFields == null
? null
: _connectionFields.getBest(buffer, -1, buffer.remaining());
if (field == null) field = CACHE.getBest(buffer, -1, buffer.remaining());
if (field != null) {
final String n;
final String v;
if (_strict) {
// Have to get the fields exactly from the buffer to match case
String fn = field.getName();
String fv = field.getValue();
n =
BufferUtil.toString(
buffer,
buffer.position() - 1,
fn.length(),
StandardCharsets.US_ASCII);
if (fv == null) v = null;
else {
v =
BufferUtil.toString(
buffer,
buffer.position() + fn.length() + 1,
fv.length(),
StandardCharsets.ISO_8859_1);
field = new HttpField(field.getHeader(), n, v);
}
} else {
n = field.getName();
v = field.getValue();
}
_header = field.getHeader();
_headerString = n;
if (v == null) {
// Header only
setState(State.HEADER_VALUE);
_string.setLength(0);
_length = 0;
buffer.position(buffer.position() + n.length() + 1);
break;
} else {
// Header and value
int pos = buffer.position() + n.length() + v.length() + 1;
byte b = buffer.get(pos);
if (b == HttpTokens.CARRIAGE_RETURN || b == HttpTokens.LINE_FEED) {
_field = field;
_valueString = v;
setState(State.HEADER_IN_VALUE);
if (b == HttpTokens.CARRIAGE_RETURN) {
_cr = true;
buffer.position(pos + 1);
} else buffer.position(pos);
break;
} else {
setState(State.HEADER_IN_VALUE);
setString(v);
buffer.position(pos);
break;
}
}
}
}
// New header
setState(State.HEADER_IN_NAME);
_string.setLength(0);
_string.append((char) ch);
_length = 1;
}
}
}
break;
case HEADER_IN_NAME:
if (ch == HttpTokens.COLON || ch == HttpTokens.LINE_FEED) {
if (_headerString == null) {
_headerString = takeString();
_header = HttpHeader.CACHE.get(_headerString);
}
_length = -1;
setState(ch == HttpTokens.LINE_FEED ? State.HEADER : State.HEADER_VALUE);
break;
}
if (ch >= HttpTokens.SPACE || ch == HttpTokens.TAB) {
if (_header != null) {
setString(_header.asString());
_header = null;
_headerString = null;
}
_string.append((char) ch);
if (ch > HttpTokens.SPACE) _length = _string.length();
break;
}
throw new BadMessage("Illegal character");
case HEADER_VALUE:
if (ch > HttpTokens.SPACE || ch < 0) {
_string.append((char) (0xff & ch));
_length = _string.length();
setState(State.HEADER_IN_VALUE);
break;
}
if (ch == HttpTokens.SPACE || ch == HttpTokens.TAB) break;
if (ch == HttpTokens.LINE_FEED) {
if (_length > 0) {
_value = null;
_valueString =
(_valueString == null) ? takeString() : (_valueString + " " + takeString());
}
setState(State.HEADER);
break;
}
throw new BadMessage("Illegal character");
case HEADER_IN_VALUE:
if (ch >= HttpTokens.SPACE || ch < 0) {
if (_valueString != null) {
setString(_valueString);
_valueString = null;
_field = null;
}
_string.append((char) (0xff & ch));
if (ch > HttpTokens.SPACE || ch < 0) _length = _string.length();
break;
}
if (ch == HttpTokens.LINE_FEED) {
if (_length > 0) {
_value = null;
_valueString = takeString();
_length = -1;
}
setState(State.HEADER);
break;
}
throw new BadMessage("Illegal character");
default:
throw new IllegalStateException(_state.toString());
}
}
return handle;
}