func parseBinaryCommand(parser *parser, buf *streambuf.Buffer) parseResult {
debug("on binary message")
if !buf.Avail(memcacheHeaderSize) {
return parser.needMore()
}
msg := parser.message
msg.isBinary = true
magic, _ := buf.ReadNetUint8At(0)
switch magic {
case MemcacheMagicRequest:
msg.IsRequest = true
case MemcacheMagicResponse:
msg.IsRequest = false
default:
return parser.failing(ErrInvalidMemcacheMagic)
}
opcode, _ := buf.ReadNetUint8At(1)
keyLen, err := buf.ReadNetUint16At(2)
extraLen, _ := buf.ReadNetUint8At(4)
if err != nil {
return parser.failing(err)
}
debug("magic: %v", magic)
debug("opcode: %v", opcode)
debug("extra len: %v", extraLen)
debug("key len: %v", keyLen)
totalHeaderLen := memcacheHeaderSize + int(extraLen) + int(keyLen)
debug("total header len: %v", totalHeaderLen)
if !buf.Avail(totalHeaderLen) {
return parser.needMore()
}
command := memcacheBinaryCommandTable[memcacheOpcode(opcode)]
if command == nil {
debug("unknown command")
command = binaryUnknownCommand
}
msg.opcode = memcacheOpcode(opcode)
msg.command = command
msg.isQuiet = isQuietOpcode(msg.opcode)
return parser.contWithShallow(buf, command.parse)
}