public List<ByteBuffer> createHandshake(
Handshakedata handshakedata, Role ownrole, boolean withcontent) {
StringBuilder bui = new StringBuilder(100);
if (handshakedata instanceof ClientHandshake) {
bui.append("GET ");
bui.append(((ClientHandshake) handshakedata).getResourceDescriptor());
bui.append(" HTTP/1.1");
} else if (handshakedata instanceof ServerHandshake) {
bui.append("HTTP/1.1 101 " + ((ServerHandshake) handshakedata).getHttpStatusMessage());
} else {
throw new RuntimeException("unknow role");
}
bui.append("\r\n");
Iterator<String> it = handshakedata.iterateHttpFields();
while (it.hasNext()) {
String fieldname = it.next();
String fieldvalue = handshakedata.getFieldValue(fieldname);
bui.append(fieldname);
bui.append(": ");
bui.append(fieldvalue);
bui.append("\r\n");
}
bui.append("\r\n");
byte[] httpheader = Charsetfunctions.asciiBytes(bui.toString());
byte[] content = withcontent ? handshakedata.getContent() : null;
ByteBuffer bytebuffer =
ByteBuffer.allocate((content == null ? 0 : content.length) + httpheader.length);
bytebuffer.put(httpheader);
if (content != null) bytebuffer.put(content);
bytebuffer.flip();
return Collections.singletonList(bytebuffer);
}
protected boolean basicAccept(Handshakedata handshakedata) {
return handshakedata.getFieldValue("Upgrade").equalsIgnoreCase("websocket")
&& handshakedata
.getFieldValue("Connection")
.toLowerCase(Locale.ENGLISH)
.contains("upgrade");
}
public static int readVersion(Handshakedata handshakedata) {
String vers = handshakedata.getFieldValue("Sec-WebSocket-Version");
if (vers.length() > 0) {
int v;
try {
v = Integer.valueOf(vers.trim());
return v;
} catch (NumberFormatException e) {
return -1;
}
}
return -1;
}