Example usage for java.io ByteArrayInputStream markSupported

Introduction

In this page you can find the example usage for java.io ByteArrayInputStream markSupported.

Prototype

public boolean markSupported() 

Source Link

Document

Tests if this InputStream supports mark/reset.

Usage

From source file:Main.java

public static void main(String[] args) throws IOException {

    byte[] buf = { 65, 66, 67, 68, 69 };

    // create new byte array input stream
    ByteArrayInputStream bais = new ByteArrayInputStream(buf);

    // test support for mark() and reset() methods invocation
    boolean isMarkSupported = bais.markSupported();
    System.out.println("Is mark supported : " + isMarkSupported);
    System.out.println("Following is the proof:");

    // print bytes
    System.out.println(bais.read());
    System.out.println(bais.read());
    System.out.println(bais.read());

    System.out.println("Mark() invocation");

    // mark() invocation;
    bais.mark(0);/*from  w w w .j a v a  2s  .co m*/
    System.out.println(bais.read());
    System.out.println(bais.read());

    System.out.println("Reset() invocation");

    // reset() invocation
    bais.reset();
    System.out.println(bais.read());
    System.out.println(bais.read());

}

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From source file:com.cyberway.issue.io.arc.ARCRecord.java

/**
* Read http header if present. Technique borrowed from HttpClient HttpParse
* class.//  w  w w .  ja v  a 2s. com
* 
* @return ByteArrayInputStream with the http header in it or null if no
*         http header.
* @throws IOException
*/
private InputStream readHttpHeader() throws IOException {
    // If judged a record that doesn't have an http header, return
    // immediately.
    if (!getHeader().getUrl().startsWith("http") || getHeader().getLength() <= MIN_HTTP_HEADER_LENGTH) {
        return null;
    }
    byte[] statusBytes = HttpParser.readRawLine(getIn());
    int eolCharCount = getEolCharsCount(statusBytes);
    if (eolCharCount <= 0) {
        throw new IOException("Failed to read http status where one was expected: "
                + ((statusBytes == null) ? "" : new String(statusBytes)));
    }
    String statusLine = EncodingUtil.getString(statusBytes, 0, statusBytes.length - eolCharCount,
            ARCConstants.DEFAULT_ENCODING);
    if ((statusLine == null) || !StatusLine.startsWithHTTP(statusLine)) {
        if (statusLine.startsWith("DELETED")) {
            // Some old ARCs have deleted records like following:
            // http://vireo.gatech.edu:80/ebt-bin/nph-dweb/dynaweb/SGI_Developer/SGITCL_PG/@Generic__BookTocView/11108%3Btd%3D2 130.207.168.42 19991010131803 text/html 29202
            // DELETED_TIME=20000425001133_DELETER=Kurt_REASON=alexalist
            // (follows ~29K spaces)
            // For now, throw a RecoverableIOException so if iterating over
            // records, we keep going.  TODO: Later make a legitimate
            // ARCRecord from the deleted record rather than throw
            // exception.
            throw new DeletedARCRecordIOException(statusLine);
        } else {
            throw new IOException("Failed parse of http status line.");
        }
    }
    this.httpStatus = new StatusLine(statusLine);

    // Save off all bytes read.  Keep them as bytes rather than
    // convert to strings so we don't have to worry about encodings
    // though this should never be a problem doing http headers since
    // its all supposed to be ascii.
    ByteArrayOutputStream baos = new ByteArrayOutputStream(statusBytes.length + 4 * 1024);
    baos.write(statusBytes);

    // Now read rest of the header lines looking for the separation
    // between header and body.
    for (byte[] lineBytes = null; true;) {
        lineBytes = HttpParser.readRawLine(getIn());
        eolCharCount = getEolCharsCount(lineBytes);
        if (eolCharCount <= 0) {
            throw new IOException(
                    "Failed reading http headers: " + ((lineBytes != null) ? new String(lineBytes) : null));
        }
        // Save the bytes read.
        baos.write(lineBytes);
        if ((lineBytes.length - eolCharCount) <= 0) {
            // We've finished reading the http header.
            break;
        }
    }

    byte[] headerBytes = baos.toByteArray();
    // Save off where body starts.
    this.getMetaData().setContentBegin(headerBytes.length);
    ByteArrayInputStream bais = new ByteArrayInputStream(headerBytes);
    if (!bais.markSupported()) {
        throw new IOException("ByteArrayInputStream does not support mark");
    }
    bais.mark(headerBytes.length);
    // Read the status line.  Don't let it into the parseHeaders function.
    // It doesn't know what to do with it.
    bais.read(statusBytes, 0, statusBytes.length);
    this.httpHeaders = HttpParser.parseHeaders(bais, ARCConstants.DEFAULT_ENCODING);
    this.getMetaData().setStatusCode(Integer.toString(getStatusCode()));
    bais.reset();
    return bais;
}

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From source file:org.archive.io.arc.ARCRecord.java

/**
 * Read http header if present. Technique borrowed from HttpClient HttpParse
 * class. set errors when found./*from   ww  w .  jav a 2s  .  co m*/
 * 
 * @return ByteArrayInputStream with the http header in it or null if no
 *         http header.
 * @throws IOException
 */
private InputStream readHttpHeader() throws IOException {

    // this can be helpful when simply iterating over records, 
    // looking for problems.
    Logger logger = Logger.getLogger(this.getClass().getName());
    ArchiveRecordHeader h = this.getHeader();

    // If judged a record that doesn't have an http header, return
    // immediately.
    String url = getHeader().getUrl();
    if (!url.startsWith("http") || getHeader().getLength() <= MIN_HTTP_HEADER_LENGTH) {
        return null;
    }

    String statusLine;
    byte[] statusBytes;
    int eolCharCount = 0;
    int errOffset = 0;

    // Read status line, skipping any errant http headers found before it
    // This allows a larger number of 'corrupt' arcs -- where headers were accidentally
    // inserted before the status line to be readable
    while (true) {
        statusBytes = LaxHttpParser.readRawLine(getIn());
        eolCharCount = getEolCharsCount(statusBytes);
        if (eolCharCount <= 0) {
            throw new RecoverableIOException("Failed to read http status where one was expected: "
                    + ((statusBytes == null) ? "" : new String(statusBytes)));
        }

        statusLine = EncodingUtil.getString(statusBytes, 0, statusBytes.length - eolCharCount,
                ARCConstants.DEFAULT_ENCODING);

        // If a null or DELETED break immediately
        if ((statusLine == null) || statusLine.startsWith("DELETED")) {
            break;
        }

        // If it's actually the status line, break, otherwise continue skipping any
        // previous header values
        if (!statusLine.contains(":") && StatusLine.startsWithHTTP(statusLine)) {
            break;
        }

        // Add bytes read to error "offset" to add to position
        errOffset += statusBytes.length;
    }

    if (errOffset > 0) {
        this.incrementPosition(errOffset);
    }

    if ((statusLine == null) || !StatusLine.startsWithHTTP(statusLine)) {
        if (statusLine.startsWith("DELETED")) {
            // Some old ARCs have deleted records like following:
            // http://vireo.gatech.edu:80/ebt-bin/nph-dweb/dynaweb/SGI_Developer/SGITCL_PG/@Generic__BookTocView/11108%3Btd%3D2 130.207.168.42 19991010131803 text/html 29202
            // DELETED_TIME=20000425001133_DELETER=Kurt_REASON=alexalist
            // (follows ~29K spaces)
            // For now, throw a RecoverableIOException so if iterating over
            // records, we keep going.  TODO: Later make a legitimate
            // ARCRecord from the deleted record rather than throw
            // exception.
            throw new DeletedARCRecordIOException(statusLine);
        } else {
            this.errors.add(ArcRecordErrors.HTTP_STATUS_LINE_INVALID);
        }
    }

    try {
        this.httpStatus = new StatusLine(statusLine);
    } catch (IOException e) {
        logger.warning(e.getMessage() + " at offset: " + h.getOffset());
        this.errors.add(ArcRecordErrors.HTTP_STATUS_LINE_EXCEPTION);
    }

    // Save off all bytes read.  Keep them as bytes rather than
    // convert to strings so we don't have to worry about encodings
    // though this should never be a problem doing http headers since
    // its all supposed to be ascii.
    ByteArrayOutputStream baos = new ByteArrayOutputStream(statusBytes.length + 4 * 1024);
    baos.write(statusBytes);

    // Now read rest of the header lines looking for the separation
    // between header and body.
    for (byte[] lineBytes = null; true;) {
        lineBytes = LaxHttpParser.readRawLine(getIn());
        eolCharCount = getEolCharsCount(lineBytes);
        if (eolCharCount <= 0) {
            if (getIn().available() == 0) {
                httpHeaderBytesRead += statusBytes.length;
                logger.warning("HTTP header truncated at offset: " + h.getOffset());
                this.errors.add(ArcRecordErrors.HTTP_HEADER_TRUNCATED);
                this.setEor(true);
                break;
            } else {
                throw new IOException(
                        "Failed reading http headers: " + ((lineBytes != null) ? new String(lineBytes) : null));
            }
        } else {
            httpHeaderBytesRead += lineBytes.length;
        }
        // Save the bytes read.
        baos.write(lineBytes);
        if ((lineBytes.length - eolCharCount) <= 0) {
            // We've finished reading the http header.
            break;
        }
    }

    byte[] headerBytes = baos.toByteArray();
    // Save off where body starts.
    this.getMetaData().setContentBegin(headerBytes.length);
    ByteArrayInputStream bais = new ByteArrayInputStream(headerBytes);
    if (!bais.markSupported()) {
        throw new IOException("ByteArrayInputStream does not support mark");
    }
    bais.mark(headerBytes.length);
    // Read the status line.  Don't let it into the parseHeaders function.
    // It doesn't know what to do with it.
    bais.read(statusBytes, 0, statusBytes.length);
    this.httpHeaders = LaxHttpParser.parseHeaders(bais, ARCConstants.DEFAULT_ENCODING);
    this.getMetaData().setStatusCode(Integer.toString(getStatusCode()));
    bais.reset();
    return bais;
}

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From source file:org.archive.io.HeaderedArchiveRecord.java

/**
 * Read header if present. Technique borrowed from HttpClient HttpParse
 * class. Using http parser code for now. Later move to more generic header
 * parsing code if there proves a need.//from w w w  .j a va 2  s  .  c  o  m
 * 
 * @return ByteArrayInputStream with the http header in it or null if no
 *         http header.
 * @throws IOException
 */
private InputStream readContentHeaders() throws IOException {
    // If judged a record that doesn't have an http header, return
    // immediately.
    if (!hasContentHeaders()) {
        return null;
    }
    byte[] statusBytes = LaxHttpParser.readRawLine(getIn());
    int eolCharCount = getEolCharsCount(statusBytes);
    if (eolCharCount <= 0) {
        throw new IOException(
                "Failed to read raw lie where one " + " was expected: " + new String(statusBytes));
    }
    String statusLine = EncodingUtil.getString(statusBytes, 0, statusBytes.length - eolCharCount,
            ARCConstants.DEFAULT_ENCODING);
    if (statusLine == null) {
        throw new NullPointerException("Expected status line is null");
    }
    // TODO: Tighten up this test.
    boolean isHttpResponse = StatusLine.startsWithHTTP(statusLine);
    boolean isHttpRequest = false;
    if (!isHttpResponse) {
        isHttpRequest = statusLine.toUpperCase().startsWith("GET")
                || !statusLine.toUpperCase().startsWith("POST");
    }
    if (!isHttpResponse && !isHttpRequest) {
        throw new UnexpectedStartLineIOException("Failed parse of " + "status line: " + statusLine);
    }
    this.statusCode = isHttpResponse ? (new StatusLine(statusLine)).getStatusCode() : -1;

    // Save off all bytes read.  Keep them as bytes rather than
    // convert to strings so we don't have to worry about encodings
    // though this should never be a problem doing http headers since
    // its all supposed to be ascii.
    ByteArrayOutputStream baos = new ByteArrayOutputStream(statusBytes.length + 4 * 1024);
    baos.write(statusBytes);

    // Now read rest of the header lines looking for the separation
    // between header and body.
    for (byte[] lineBytes = null; true;) {
        lineBytes = LaxHttpParser.readRawLine(getIn());
        eolCharCount = getEolCharsCount(lineBytes);
        if (eolCharCount <= 0) {
            throw new IOException(
                    "Failed reading headers: " + ((lineBytes != null) ? new String(lineBytes) : null));
        }
        // Save the bytes read.
        baos.write(lineBytes);
        if ((lineBytes.length - eolCharCount) <= 0) {
            // We've finished reading the http header.
            break;
        }
    }

    byte[] headerBytes = baos.toByteArray();
    // Save off where content body, post content headers, starts.
    this.contentHeadersLength = headerBytes.length;
    ByteArrayInputStream bais = new ByteArrayInputStream(headerBytes);
    if (!bais.markSupported()) {
        throw new IOException("ByteArrayInputStream does not support mark");
    }
    bais.mark(headerBytes.length);
    // Read the status line.  Don't let it into the parseHeaders function.
    // It doesn't know what to do with it.
    bais.read(statusBytes, 0, statusBytes.length);
    this.contentHeaders = LaxHttpParser.parseHeaders(bais, ARCConstants.DEFAULT_ENCODING);
    bais.reset();
    return bais;
}

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