Examples with PushbackInputStream java.io.PushbackInputStream used on opensource projects

Example 21 with PushbackInputStream

use of java.io.PushbackInputStream in project j2objc by google.

the class ZipInputStream method closeEntry.

/**
     * Closes the current zip entry and prepares to read the next entry.
     *
     * @throws IOException
     *             if an {@code IOException} occurs.
     */
public void closeEntry() throws IOException {
    checkClosed();
    if (currentEntry == null) {
        return;
    }
    /*
         * The following code is careful to leave the ZipInputStream in a
         * consistent state, even when close() results in an exception. It does
         * so by:
         *  - pushing bytes back into the source stream
         *  - reading a data descriptor footer from the source stream
         *  - resetting fields that manage the entry being closed
         */
    // Ensure all entry bytes are read
    Exception failure = null;
    try {
        Streams.skipAll(this);
    } catch (Exception e) {
        failure = e;
    }
    int inB, out;
    if (currentEntry.compressionMethod == ZipEntry.DEFLATED) {
        inB = inf.getTotalIn();
        out = inf.getTotalOut();
    } else {
        inB = inRead;
        out = inRead;
    }
    int diff = entryIn - inB;
    // Pushback any required bytes
    if (diff != 0) {
        ((PushbackInputStream) in).unread(buf, len - diff, diff);
    }
    try {
        readAndVerifyDataDescriptor(inB, out, currentEntryIsZip64);
    } catch (Exception e) {
        if (failure == null) {
            // otherwise we're already going to throw
            failure = e;
        }
    }
    inf.reset();
    lastRead = inRead = entryIn = len = 0;
    crc.reset();
    currentEntry = null;
    if (failure != null) {
        if (failure instanceof IOException) {
            throw (IOException) failure;
        } else if (failure instanceof RuntimeException) {
            throw (RuntimeException) failure;
        }
        AssertionError error = new AssertionError();
        error.initCause(failure);
        throw error;
    }
}

Example 22 with PushbackInputStream

use of java.io.PushbackInputStream in project j2objc by google.

the class GZIPInputStream method maybeReadNextMember.

private boolean maybeReadNextMember() throws IOException {
    // If we have any unconsumed data in the inflater buffer, we have to
    // scan that first. The fact that we've reached here implies we've
    // successfully consumed the GZIP trailer.
    final int remaining = inf.getRemaining() - GZIP_TRAILER_SIZE;
    if (remaining > 0) {
        // remaining when it is first created.
        if (!(in instanceof PushbackInputStream)) {
            in = new PushbackInputStream(in, buf.length);
        }
        ((PushbackInputStream) in).unread(buf, inf.getCurrentOffset() + GZIP_TRAILER_SIZE, remaining);
    }
    final byte[] buffer;
    try {
        buffer = readHeader(in);
    } catch (EOFException eof) {
        // gzip record.
        return true;
    }
    final short magic = Memory.peekShort(buffer, 0, ByteOrder.LITTLE_ENDIAN);
    if (magic != (short) GZIP_MAGIC) {
        // from this stream.
        return true;
    }
    // We've encountered the gzip magic number, so we assume there's another
    // member in the stream.
    parseGzipHeader(in, buffer, crc, buf);
    return false;
}

Example 23 with PushbackInputStream

use of java.io.PushbackInputStream in project XobotOS by xamarin.

the class JDKX509CertificateFactory method engineGenerateCRL.

/**
     * Generates a certificate revocation list (CRL) object and initializes
     * it with the data read from the input stream inStream.
     */
public CRL engineGenerateCRL(InputStream inStream) throws CRLException {
    if (currentCrlStream == null) {
        currentCrlStream = inStream;
        sCrlData = null;
        sCrlDataObjectCount = 0;
    } else if (// reset if input stream has changed
    currentCrlStream != inStream) {
        currentCrlStream = inStream;
        sCrlData = null;
        sCrlDataObjectCount = 0;
    }
    try {
        if (sCrlData != null) {
            if (sCrlDataObjectCount != sCrlData.size()) {
                return getCRL();
            } else {
                sCrlData = null;
                sCrlDataObjectCount = 0;
                return null;
            }
        }
        int limit = ProviderUtil.getReadLimit(inStream);
        PushbackInputStream pis = new PushbackInputStream(inStream);
        int tag = pis.read();
        if (tag == -1) {
            return null;
        }
        pis.unread(tag);
        if (// assume ascii PEM encoded.
        tag != 0x30) {
            return readPEMCRL(pis);
        } else {
            // lazy evaluate to help processing of large CRLs
            return readDERCRL(new ASN1InputStream(pis, limit, true));
        }
    } catch (CRLException e) {
        throw e;
    } catch (Exception e) {
        throw new CRLException(e.toString());
    }
}

Example 24 with PushbackInputStream

use of java.io.PushbackInputStream in project XobotOS by xamarin.

the class ZipInputStream method closeEntry.

/**
     * Closes the current ZIP entry and positions to read the next entry.
     *
     * @throws IOException
     *             if an {@code IOException} occurs.
     */
public void closeEntry() throws IOException {
    checkClosed();
    if (currentEntry == null) {
        return;
    }
    if (currentEntry instanceof java.util.jar.JarEntry) {
        Attributes temp = ((JarEntry) currentEntry).getAttributes();
        if (temp != null && temp.containsKey("hidden")) {
            return;
        }
    }
    /*
         * The following code is careful to leave the ZipInputStream in a
         * consistent state, even when close() results in an exception. It does
         * so by:
         *  - pushing bytes back into the source stream
         *  - reading a data descriptor footer from the source stream
         *  - resetting fields that manage the entry being closed
         */
    // Ensure all entry bytes are read
    Exception failure = null;
    try {
        Streams.skipAll(this);
    } catch (Exception e) {
        failure = e;
    }
    int inB, out;
    if (currentEntry.compressionMethod == ZipEntry.DEFLATED) {
        inB = inf.getTotalIn();
        out = inf.getTotalOut();
    } else {
        inB = inRead;
        out = inRead;
    }
    int diff = entryIn - inB;
    // Pushback any required bytes
    if (diff != 0) {
        ((PushbackInputStream) in).unread(buf, len - diff, diff);
    }
    try {
        readAndVerifyDataDescriptor(inB, out);
    } catch (Exception e) {
        if (failure == null) {
            // otherwise we're already going to throw
            failure = e;
        }
    }
    inf.reset();
    lastRead = inRead = entryIn = len = 0;
    crc.reset();
    currentEntry = null;
    if (failure != null) {
        if (failure instanceof IOException) {
            throw (IOException) failure;
        } else if (failure instanceof RuntimeException) {
            throw (RuntimeException) failure;
        }
        AssertionError error = new AssertionError();
        error.initCause(failure);
        throw error;
    }
}

Example 25 with PushbackInputStream

use of java.io.PushbackInputStream in project zm-mailbox by Zimbra.

the class NativeFormatter method sendbackBinaryData.

public static void sendbackBinaryData(HttpServletRequest req, HttpServletResponse resp, InputStream in, String contentType, String disposition, String filename, long size, boolean ignoreContentDisposition) throws IOException {
    resp.setContentType(contentType);
    if (disposition == null) {
        String disp = req.getParameter(UserServlet.QP_DISP);
        disposition = (disp == null || disp.toLowerCase().startsWith("i")) ? Part.INLINE : Part.ATTACHMENT;
    }
    PushbackInputStream pis = new PushbackInputStream(in, READ_AHEAD_BUFFER_SIZE);
    boolean isSafe = false;
    HttpUtil.Browser browser = HttpUtil.guessBrowser(req);
    if (browser != HttpUtil.Browser.IE) {
        isSafe = true;
    } else if (disposition.equals(Part.ATTACHMENT)) {
        isSafe = true;
        if (isScriptableContent(contentType)) {
            // ask it to save the file
            resp.addHeader("X-Download-Options", "noopen");
        }
    }
    if (!isSafe) {
        byte[] buf = new byte[READ_AHEAD_BUFFER_SIZE];
        int bytesRead = pis.read(buf, 0, READ_AHEAD_BUFFER_SIZE);
        boolean hasScript;
        for (int i = 0; i < bytesRead; i++) {
            if (buf[i] == SCRIPT_PATTERN[0][0] || buf[i] == SCRIPT_PATTERN[1][0]) {
                hasScript = true;
                for (int pos = 1; pos < 7 && (i + pos) < bytesRead; pos++) {
                    if (buf[i + pos] != SCRIPT_PATTERN[0][pos] && buf[i + pos] != SCRIPT_PATTERN[1][pos]) {
                        hasScript = false;
                        break;
                    }
                }
                if (hasScript) {
                    resp.addHeader("Cache-Control", "no-transform");
                    disposition = Part.ATTACHMENT;
                    break;
                }
            }
        }
        if (bytesRead > 0)
            pis.unread(buf, 0, bytesRead);
    }
    if (!ignoreContentDisposition) {
        String cd = HttpUtil.createContentDisposition(req, disposition, filename == null ? "unknown" : filename);
        resp.addHeader("Content-Disposition", cd);
    }
    if (size > 0)
        resp.setContentLength((int) size);
    ByteUtil.copy(pis, true, resp.getOutputStream(), false);
}