Example usage for java.io Reader read

Introduction

In this page you can find the example usage for java.io Reader read.

Prototype

public int read(char cbuf[]) throws IOException 

Source Link

Document

Reads characters into an array.

Usage

From source file:com.serotonin.bacnet4j.util.sero.StreamUtils.java

public static void transfer(Reader reader, Writer writer, long limit) throws IOException {
    char[] buf = new char[1024];
    int readcount;
    long total = 0;
    while ((readcount = reader.read(buf)) != -1) {
        if (limit != -1) {
            if (total + readcount > limit)
                readcount = (int) (limit - total);
        }/*from   ww  w .  j  a  v a 2  s  .  co m*/

        if (readcount > 0)
            writer.write(buf, 0, readcount);

        total += readcount;
        if (limit != -1 && total >= limit)
            break;
    }
    writer.flush();
}

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From source file:com.github.gekoh.yagen.hst.CreateEntities.java

private static String readContents(InputStream is) {
    StringWriter wr = new StringWriter();

    try {//from  ww w. ja  va 2 s.  c  o m
        Reader rd = new InputStreamReader(is, "UTF-8");

        char[] buf = new char[1024];
        int read;
        while ((read = rd.read(buf)) > 0) {
            wr.write(buf, 0, read);
        }

    } catch (Exception e) {
        LOG.error("An error occurred while reading the template file.", e);
    }

    return wr.toString();
}

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From source file:net.opentracker.android.OTSend.java

/**
 * getResponseBody function gives out the HTTP POST data from the given
 * httpResponse output: data from the http as string input : httpEntity type
 * //from   w w  w.  j a v a2s  .  co  m
 * based on:
 * http://thinkandroid.wordpress.com/2009/12/30/getting-response-body
 * -of-httpresponse/
 */
private static String getResponseBody(final HttpEntity entity) throws IOException, ParseException {
    LogWrapper.v(TAG, "getResponseBody(final HttpEntity entity)");

    if (entity == null) {
        throw new IllegalArgumentException("HTTP entity may not be null");
    }
    InputStream instream = entity.getContent();
    if (instream == null) {
        return "";
    }
    if (entity.getContentLength() > Integer.MAX_VALUE) {
        throw new IllegalArgumentException("HTTP entity too large to be buffered in memory");
    }
    String charset = EntityUtils.getContentCharSet(entity);
    if (charset == null) {
        charset = HTTP.DEFAULT_CONTENT_CHARSET;
    }
    Reader reader = new InputStreamReader(instream, charset);
    StringBuilder buffer = new StringBuilder();
    try {
        char[] tmp = new char[1024];
        int l;
        while ((l = reader.read(tmp)) != -1) {
            buffer.append(tmp, 0, l);
        }
    } finally {
        reader.close();
    }
    return buffer.toString();
}

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From source file:de.thischwa.pmcms.tool.file.FileTool.java

/**
 * Return the content of a file as string. Encoding is utf-8.
 *//*from   ww  w  .  j a  v  a2 s . c  o m*/
public static String toString(File file) throws IOException {
    StringBuffer fileData = new StringBuffer(2048 * 5);
    Reader reader = null;
    try {
        reader = new InputStreamReader(new BufferedInputStream(new FileInputStream(file)), "utf-8");
        char[] buf = new char[2048];
        int numRead = 0;
        while ((numRead = reader.read(buf)) != -1) {
            fileData.append(buf, 0, numRead);
        }
    } catch (IOException e) {
        throw e;
    } finally {
        IOUtils.closeQuietly(reader);
    }
    return fileData.toString();

}

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From source file:com.cloudant.tests.UnicodeTest.java

/**
 * Copies the content of an entity to an Appendable, as a sequence of chars.
 *
 * @param destination An Appendable (such as a StringBuilder, a Writer, or a PrintStream).
 * @param reader      A Reader that wraps the InputStream of the entity returned by the given
 *                    URI.//from   ww w.  jav  a  2 s .c  o  m
 *                    Should be buffered.
 * @throws RuntimeException if there is an exception reading the entity
 * @throws IOException      if there is an exception writing to the destination
 */
private static void pipeEntityContentAsChars(Appendable destination, Reader reader, URI uri)
        throws IOException {
    char[] buffer = new char[1024];
    for (;;) {
        int n;
        try {
            n = reader.read(buffer);
        } catch (SocketException e) {
            // At EOF, we may get this exception:
            // java.net.SocketException: Socket is closed
            //   at com.sun.net.ssl.internal.ssl.SSLSocketImpl.checkEOF(SSLSocketImpl.java:1284)
            //   at com.sun.net.ssl.internal.ssl.AppInputStream.read(AppInputStream.java:65)
            //   at org.apache.http.impl.io.AbstractSessionInputBuffer.fillBuffer
            // (AbstractSessionInputBuffer.java:149)
            //   at org.apache.http.impl.io.SocketInputBuffer.fillBuffer(SocketInputBuffer
            // .java:110)
            //   at org.apache.http.impl.io.AbstractSessionInputBuffer.readLine
            // (AbstractSessionInputBuffer.java:264)
            //   at org.apache.http.impl.io.ChunkedInputStream.getChunkSize
            // (ChunkedInputStream.java:246)
            //   at org.apache.http.impl.io.ChunkedInputStream.nextChunk(ChunkedInputStream
            // .java:204)
            //   at org.apache.http.impl.io.ChunkedInputStream.read(ChunkedInputStream.java:167)
            //   at org.apache.http.conn.EofSensorInputStream.read(EofSensorInputStream
            // .java:138)
            //   at java.io.BufferedInputStream.read1(BufferedInputStream.java:256)
            //   at java.io.BufferedInputStream.read(BufferedInputStream.java:317)
            //   at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:264)
            //   at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:306)
            //   at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:158)
            //   at java.io.InputStreamReader.read(InputStreamReader.java:167)
            //   at java.io.Reader.read(Reader.java:123)
            // See also http://stackoverflow
            // .com/questions/17040698/httpcomponentss-ssl-connection-results-in-socket-is
            // -closed
            break;
        } catch (IOException e) {
            throw new RuntimeException("Error reading from " + uri, e);
        }
        if (n < 0) {
            break;
        }
        destination.append(CharBuffer.wrap(buffer, 0, n));
    }
}

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From source file:de.alpharogroup.file.read.ReadFileUtils.java

/**
 * The Method reader2String() reads the data from the Reader into a String.
 *
 * @param reader//from   ww  w  .ja  va  2s  .c om
 *            The Reader from where we read.
 * @return The String that we read from the Reader.
 */
public static String reader2String(final Reader reader) {
    final StringBuffer stringBuffer = new StringBuffer();
    final char[] charArray = new char[FileConst.BLOCKSIZE];
    int tmp;
    try {
        while ((tmp = reader.read(charArray)) > 0) {
            stringBuffer.append(charArray, 0, tmp);
        }
    } catch (final IOException e) {
        LOGGER.log(Level.SEVERE, "reader2String failed...\n" + e.getMessage(), e);
    } finally {
        StreamUtils.closeReader(reader);
    }
    return stringBuffer.toString();
}

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From source file:de.alpharogroup.file.read.ReadFileExtensions.java

/**
 * The Method reader2String() reads the data from the Reader into a String.
 *
 * @param reader//from   www  . ja v a2  s .  com
 *            The Reader from where we read.
 * @return The String that we read from the Reader.
 */
public static String reader2String(final Reader reader) {
    final StringBuffer stringBuffer = new StringBuffer();
    final char[] charArray = new char[FileConst.BLOCKSIZE];
    int tmp;
    try {
        while ((tmp = reader.read(charArray)) > 0) {
            stringBuffer.append(charArray, 0, tmp);
        }
    } catch (final IOException e) {
        LOGGER.log(Level.SEVERE, "reader2String failed...\n" + e.getMessage(), e);
    } finally {
        StreamExtensions.closeReader(reader);
    }
    return stringBuffer.toString();
}

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From source file:fr.mby.saml2.sp.impl.helper.SamlHelper.java

/**
 * Decode a SAML2 anthentication request for the HTTP-redirect binding.
 * //from  w w  w  .j ava 2s  .  c  o m
 * @param authnRequest
 *            the authn request
 * @return the encoded request
 * @throws IOException
 */
public static String httpRedirectDecode(final String encodedRequest) throws IOException {
    String inflatedRequest = null;

    ByteArrayInputStream bytesIn = null;
    InflaterInputStream inflater = null;

    final byte[] decodedBytes = Base64.decode(encodedRequest);

    try {
        bytesIn = new ByteArrayInputStream(decodedBytes);
        inflater = new InflaterInputStream(bytesIn, new Inflater(true));
        final Writer writer = new StringWriter();
        final char[] buffer = new char[1024];

        final Reader reader = new BufferedReader(new InputStreamReader(inflater, "UTF-8"));
        int n;
        while ((n = reader.read(buffer)) != -1) {
            writer.write(buffer, 0, n);
        }

        inflatedRequest = writer.toString();
    } finally {
        if (bytesIn != null) {
            bytesIn.close();
        }
        if (inflater != null) {
            inflater.close();
        }
    }

    return inflatedRequest;
}

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From source file:com.aqnote.shared.cryptology.util.lang.StreamUtil.java

/**
 * ??, ?. ?./*from  www.j a  v  a  2  s .  co  m*/
 * 
 * @param in ?
 * @param out ?
 * @param bufferSize ?()
 * @throws IOException 
 */
public static void io(Reader in, Writer out, int bufferSize) throws IOException {
    if (bufferSize == -1) {
        bufferSize = DEFAULT_BUFFER_SIZE >> 1;
    }

    char[] buffer = new char[bufferSize];
    int amount;

    while ((amount = in.read(buffer)) >= 0) {
        out.write(buffer, 0, amount);
    }
}

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From source file:com.navercorp.pinpoint.profiler.modifier.connector.httpclient4.interceptor.AbstractHttpRequestExecute.java

/**
 * copy: EntityUtils//  www  . j ava 2s .  c o m
 * Get the entity content as a String, using the provided default character set
 * if none is found in the entity.
 * If defaultCharset is null, the default "ISO-8859-1" is used.
 *
 * @param entity must not be null
 * @param defaultCharset character set to be applied if none found in the entity
 * @return the entity content as a String. May be null if
 *   {@link HttpEntity#getContent()} is null.
 * @throws ParseException if header elements cannot be parsed
 * @throws IllegalArgumentException if entity is null or if content length > Integer.MAX_VALUE
 * @throws IOException if an error occurs reading the input stream
 */
public static String entityUtilsToString(final HttpEntity entity, final String defaultCharset, int maxLength)
        throws IOException, ParseException {
    if (entity == null) {
        throw new IllegalArgumentException("HTTP entity may not be null");
    }
    final InputStream instream = entity.getContent();
    if (instream == null) {
        return null;
    }
    try {
        if (entity.getContentLength() > Integer.MAX_VALUE) {
            return "HTTP entity too large to be buffered in memory length:" + entity.getContentLength();
        }
        String charset = getContentCharSet(entity);
        if (charset == null) {
            charset = defaultCharset;
        }
        if (charset == null) {
            charset = HTTP.DEFAULT_CONTENT_CHARSET;
        }
        Reader reader = new InputStreamReader(instream, charset);
        final StringBuilder buffer = new StringBuilder(maxLength * 2);
        char[] tmp = new char[1024];
        int l;
        while ((l = reader.read(tmp)) != -1) {
            buffer.append(tmp, 0, l);
            if (buffer.length() >= maxLength) {
                break;
            }
        }
        return buffer.toString();
    } finally {
        instream.close();
    }
}

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