Exemplo n.º 1
0
func (p *parser) parseArray(depth int, buf *streambuf.Buffer) (string, bool, bool, bool) {
	line, err := buf.UntilCRLF()
	if err != nil {
		debug("End of line not found, waiting for more data")
		return "", false, false, false
	}
	debug("line %s: %d", line, buf.BufferConsumed())

	if len(line) == 3 && line[1] == '-' && line[2] == '1' {
		return "nil", false, true, true
	}

	if len(line) == 2 && line[1] == '0' {
		return "[]", false, true, true
	}

	count, err := strconv.ParseInt(string(line[1:]), 10, 64)
	if err != nil {
		logp.Err("Failed to read number of bulk messages: %s", err)
		return "", false, false, false
	}
	if count < 0 {
		return "nil", false, true, true
	}

	content := make([]string, 0, count)
	// read sub elements

	iserror := false
	for i := 0; i < int(count); i++ {
		var value string
		var ok, complete bool

		value, iserror, ok, complete := p.dispatch(depth+1, buf)
		if !ok || !complete {
			debug("Array incomplete")
			return "", iserror, ok, complete
		}

		content = append(content, value)
	}

	if depth == 0 && isRedisCommand(content[0]) { // we've got a request
		p.message.IsRequest = true
		p.message.Method = content[0]
		p.message.Path = content[1]
	}

	var value string
	if depth == 0 && p.message.IsRequest {
		value = strings.Join(content, " ")
	} else {
		value = "[" + strings.Join(content, ", ") + "]"
	}
	return value, iserror, true, true
}
Exemplo n.º 2
0
func parseVersionNumber(parser *parser, buf *streambuf.Buffer) parseResult {
	msg := parser.message
	if msg.IsRequest {
		return parser.contWith(buf, parseStateDataBinary)
	}

	// size already checked
	bytes, _ := buf.Collect(int(msg.bytes))
	msg.str = memcacheString{bytes}

	return parser.yield(buf.BufferConsumed())
}
Exemplo n.º 3
0
func (parser *parser) parse(buf *streambuf.Buffer) (bool, bool) {
	snapshot := buf.Snapshot()

	content, iserror, ok, complete := parser.dispatch(0, buf)
	if !ok || !complete {
		// on error or incomplete message drop all parsing progress, due to
		// parse not being statefull among multiple calls
		// => parser needs to restart parsing all content
		buf.Restore(snapshot)
		return ok, complete
	}

	parser.message.IsError = iserror
	parser.message.Size = buf.BufferConsumed()
	parser.message.Message = content
	return true, true
}
Exemplo n.º 4
0
func parseStatResponse(parser *parser, buf *streambuf.Buffer) parseResult {
	msg := parser.message
	if msg.IsRequest {
		return parser.contWith(buf, parseStateDataBinary)
	}

	bytes, _ := buf.Collect(int(msg.bytes))

	if len(msg.keys) == 0 {
		return parser.failing(ErrExpectedKeys)
	}

	msg.stats = append(msg.stats, memcacheStat{
		msg.keys[0],
		memcacheString{bytes},
	})
	return parser.yield(buf.BufferConsumed())
}
Exemplo n.º 5
0
func parseDataBinary(parser *parser, buf *streambuf.Buffer) parseResult {
	msg := parser.message
	data, err := buf.Collect(int(msg.bytes - msg.bytesLost))
	if err != nil {
		if err == streambuf.ErrNoMoreBytes {
			return parser.needMore()
		}
		return parser.failing(err)
	}

	debug("found data message")
	if msg.bytesLost > 0 {
		msg.count_values++
	} else {
		parser.appendMessageData(data)
	}
	return parser.yield(buf.BufferConsumed() + int(msg.bytesLost))
}
Exemplo n.º 6
0
func parseData(parser *parser, buf *streambuf.Buffer) parseResult {
	msg := parser.message
	debug("parse message data (%v)", msg.bytes)
	data, err := buf.CollectWithSuffix(
		int(msg.bytes-msg.bytesLost),
		[]byte("\r\n"),
	)
	if err != nil {
		if err == streambuf.ErrNoMoreBytes {
			return parser.needMore()
		}
		return parser.failing(err)
	}

	debug("found message data")
	if msg.bytesLost > 0 {
		msg.count_values++
	} else {
		parser.appendMessageData(data)
	}
	return parser.yield(buf.BufferConsumed() + int(msg.bytesLost))
}
Exemplo n.º 7
0
func parseBinaryCounterResponse(
	parser *parser,
	buf *streambuf.Buffer,
) parseResult {
	msg := parser.message
	if msg.IsRequest {
		return parser.contWith(buf, parseStateDataBinary)
	}

	// size already checked
	bytes, _ := buf.Collect(int(msg.bytes))
	tmp := streambuf.NewFixed(bytes)
	err := withBinaryUint64(parser, tmp, func(msg *message, value uint64) {
		msg.value = value
	})
	if err != nil {
		return parser.failing(err)
	}

	buf.Advance(8)
	return parser.yield(buf.BufferConsumed())
}
Exemplo n.º 8
0
func (p *parser) yieldNoData(buf *streambuf.Buffer) parseResult {
	return p.yield(buf.BufferConsumed())
}