Example usage for org.springframework.core.io.buffer DataBuffer readableByteCount

Introduction

In this page you can find the example usage for org.springframework.core.io.buffer DataBuffer readableByteCount.

Prototype

int readableByteCount();

Source Link

Document

Return the number of bytes that can be read from this data buffer.

Usage

From source file:org.springframework.http.codec.multipart.DefaultMultipartMessageReader.java

/**
 * Indicates whether the given data buffer is not the last boundary, i.e. it does not start
 * with two hyphens./* w  ww.j  a  va  2  s . c o  m*/
 */
private static boolean notLastBoundary(DataBuffer dataBuffer) {
    if (dataBuffer.readableByteCount() >= 2) {
        int readPosition = dataBuffer.readPosition();
        if (dataBuffer.getByte(readPosition) == HYPHEN && dataBuffer.getByte(readPosition + 1) == HYPHEN) {
            DataBufferUtils.release(dataBuffer);
            return false;
        }
    }
    return true;
}

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From source file:org.springframework.http.codec.multipart.DefaultMultipartMessageReader.java

/**
 * Convert the given data buffer into a Part. All data up until the header separator (\r\n\r\n)
 * is passed to {@link #toHeaders(DataBuffer)}, the remaining data is considered to be the
 * body./* w  ww.  j ava2s  . co  m*/
 */
private static Part toPart(DataBuffer dataBuffer) {
    int readPosition = dataBuffer.readPosition();
    if (dataBuffer.readableByteCount() >= 2) {
        if (dataBuffer.getByte(readPosition) == CR && dataBuffer.getByte(readPosition + 1) == LF) {
            dataBuffer.readPosition(readPosition + 2);
        }
    }

    if (logger.isTraceEnabled()) {
        logger.trace("Part data: " + toString(dataBuffer));
    }
    int endIdx = HEADER_MATCHER.match(dataBuffer);

    HttpHeaders headers;
    DataBuffer body;
    if (endIdx > 0) {
        readPosition = dataBuffer.readPosition();
        int headersLength = endIdx + 1 - (readPosition + HEADER_BODY_SEPARATOR.length);
        DataBuffer headersBuffer = dataBuffer.retainedSlice(readPosition, headersLength);
        int bodyLength = dataBuffer.writePosition() - (1 + endIdx);
        body = dataBuffer.retainedSlice(endIdx + 1, bodyLength);
        headers = toHeaders(headersBuffer);
    } else {
        headers = new HttpHeaders();
        body = DataBufferUtils.retain(dataBuffer);
    }
    DataBufferUtils.release(dataBuffer);

    ContentDisposition cd = headers.getContentDisposition();
    MediaType contentType = headers.getContentType();
    if (StringUtils.hasLength(cd.getFilename())) {
        return new DefaultFilePart(headers, body);
    } else if (StringUtils.hasLength(cd.getName())
            && (contentType == null || MediaType.TEXT_PLAIN.isCompatibleWith(contentType))) {
        return new DefaultFormPart(headers, body);
    } else {
        return new DefaultPart(headers, body);
    }
}

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From source file:org.springframework.http.codec.multipart.DefaultMultipartMessageReader.java

/**
 * Convert the given data buffer into a {@link HttpHeaders} instance. The given string is read
 * as US-ASCII, then split along \r\n line boundaries, each line containing a header name and
 * value(s)./*w  w w  .j a va  2  s .  co m*/
 */
private static HttpHeaders toHeaders(DataBuffer dataBuffer) {
    byte[] bytes = new byte[dataBuffer.readableByteCount()];
    dataBuffer.read(bytes);
    DataBufferUtils.release(dataBuffer);
    String string = new String(bytes, StandardCharsets.US_ASCII);
    String[] lines = string.split(HEADER_SEPARATOR);
    HttpHeaders result = new HttpHeaders();
    for (String line : lines) {
        int idx = line.indexOf(':');
        if (idx != -1) {
            String name = line.substring(0, idx);
            String value = line.substring(idx + 1);
            while (value.startsWith(" ")) {
                value = value.substring(1);
            }
            String[] tokens = StringUtils.tokenizeToStringArray(value, ",");
            for (String token : tokens) {
                result.add(name, token);
            }
        }
    }
    return result;
}

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From source file:org.springframework.http.codec.multipart.DefaultMultipartMessageReader.java

private static String toString(DataBuffer dataBuffer) {
    byte[] bytes = new byte[dataBuffer.readableByteCount()];
    int j = 0;//from  www. j  ava 2 s. c o  m
    for (int i = dataBuffer.readPosition(); i < dataBuffer.writePosition(); i++) {
        bytes[j++] = dataBuffer.getByte(i);
    }
    return toString(bytes);
}

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