Example usage for org.springframework.messaging.simp.stomp StompCommand requiresContentLength

Introduction

In this page you can find the example usage for org.springframework.messaging.simp.stomp StompCommand requiresContentLength.

Prototype

public boolean requiresContentLength() 

Source Link

Usage

From source file:org.springframework.messaging.simp.stomp.StompEncoder.java

private void writeHeaders(StompCommand command, Map<String, Object> headers, byte[] payload,
        DataOutputStream output) throws IOException {

    @SuppressWarnings("unchecked")
    Map<String, List<String>> nativeHeaders = (Map<String, List<String>>) headers
            .get(NativeMessageHeaderAccessor.NATIVE_HEADERS);

    if (logger.isTraceEnabled()) {
        logger.trace("Encoding STOMP " + command + ", headers=" + nativeHeaders);
    }//from ww  w .  j ava2 s  .co m

    if (nativeHeaders == null) {
        return;
    }

    boolean shouldEscape = (command != StompCommand.CONNECT && command != StompCommand.CONNECTED);

    for (Entry<String, List<String>> entry : nativeHeaders.entrySet()) {
        if (command.requiresContentLength() && "content-length".equals(entry.getKey())) {
            continue;
        }

        List<String> values = entry.getValue();
        if (StompCommand.CONNECT.equals(command)
                && StompHeaderAccessor.STOMP_PASSCODE_HEADER.equals(entry.getKey())) {
            values = Collections.singletonList(StompHeaderAccessor.getPasscode(headers));
        }

        byte[] encodedKey = encodeHeaderKey(entry.getKey(), shouldEscape);
        for (String value : values) {
            output.write(encodedKey);
            output.write(COLON);
            output.write(encodeHeaderValue(value, shouldEscape));
            output.write(LF);
        }
    }

    if (command.requiresContentLength()) {
        int contentLength = payload.length;
        output.write("content-length:".getBytes(StandardCharsets.UTF_8));
        output.write(Integer.toString(contentLength).getBytes(StandardCharsets.UTF_8));
        output.write(LF);
    }
}

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