Example usage for java.net URLConnection getHeaderField

Introduction

In this page you can find the example usage for java.net URLConnection getHeaderField.

Prototype

public String getHeaderField(int n) 

Source Link

Document

Returns the value for the n ^th header field.

Usage

From source file:anhttpserver.ServerTest.java

@Test
public void multiThreadContextIsolationTest() throws Exception {
    final String res1 = "1111111111";
    final String res2 = "1";
    final String TEST_HEADER = "TEST-HEADER";

    final AtomicBoolean testPassed = new AtomicBoolean(true);

    class ThreadTestHttpHandlerAdapter extends ByteArrayHandlerAdapter {
        private String result;
        private int timeToSleep;

        ThreadTestHttpHandlerAdapter(String result, int timeToSleep) {
            this.result = result;
            this.timeToSleep = timeToSleep;
        }//w  w w  .  j av  a 2  s . c  om

        @Override
        public byte[] getResponseAsByteArray(HttpRequestContext httpRequestContext) throws IOException {
            setResponseHeader(TEST_HEADER, result, httpRequestContext);

            try {
                Thread.sleep(timeToSleep);
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }

            return result.getBytes();
        }
    }

    class ThreadTester implements Runnable {
        private String url;
        private String result;
        private int repeatCount;

        ThreadTester(String url, String result, int repeatCount) {
            this.url = url;
            this.result = result;
            this.repeatCount = repeatCount;
        }

        public void run() {
            try {
                for (int i = 0; i < repeatCount; i++) {
                    if (!testPassed.get()) {
                        return;
                    }

                    URLConnection connection = getConnection(url);
                    String headerValue = connection.getHeaderField(TEST_HEADER);
                    if (!headerValue.equals(result)) {
                        testPassed.set(false);
                        return;
                    }

                    if (!getResult(connection).equals(result)) {
                        testPassed.set(false);
                        return;
                    }
                }
            } catch (Exception e) {
                testPassed.set(false);
            }
        }
    }

    server.addHandler("/thread1", new ThreadTestHttpHandlerAdapter(res1, 0));
    server.addHandler("/thread2", new ThreadTestHttpHandlerAdapter(res2, 1));

    int count = 50;
    Thread[] threads = new Thread[count];

    String url1 = "http://localhost:9999/thread1";
    String url2 = "http://localhost:9999/thread2";

    for (int i = 0; i < count; i++) {
        threads[i] = new Thread(new ThreadTester(i % 2 == 0 ? url1 : url2, i % 2 == 0 ? res1 : res2, 20));
        threads[i].start();
    }

    for (int i = 0; i < count; i++) {
        threads[i].join();
    }

    assertTrue(testPassed.get());
}

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From source file:org.openhab.ui.habpanel.internal.gallery.community.CommunityWidgetGalleryProvider.java

@Override
public GalleryWidgetsItem getGalleryItem(String id) throws Exception {
    if (Integer.parseInt(id) < 1) {
        throw new IllegalArgumentException("invalid community gallery id");
    }/*from   w w w . j  ava2  s . c  om*/
    URL url = new URL(String.format("%s%s.json", COMMUNITY_TOPIC_URL, id));
    URLConnection connection = url.openConnection();

    try {
        Reader reader = new InputStreamReader(connection.getInputStream());
        DiscourseTopicResponse parsed = gson.fromJson(reader, DiscourseTopicResponse.class);

        GalleryWidgetsItem item = new GalleryWidgetsItem();
        item.id = id;
        item.title = parsed.title;
        item.description = parsed.post_stream.posts[0].cooked;
        item.author = parsed.details.created_by.username;
        item.authorName = parsed.post_stream.posts[0].display_username;
        item.authorAvatarUrl = COMMUNITY_BASE_URL + parsed.details.created_by.avatar_template;
        item.createdDate = parsed.created_at;
        item.likes = parsed.like_count;
        item.views = parsed.views;
        item.posts = parsed.posts_count;

        item.widgets = new ArrayList<GalleryWidgetAttachment>();

        if (parsed.post_stream.posts[0].link_counts != null) {
            for (DiscoursePostLink link : parsed.post_stream.posts[0].link_counts) {
                if (link.url.startsWith("https://github.com")) {
                    item.githubLink = String.join("/", Arrays.asList(link.url.split("/", 6)).subList(0, 5));
                } else if (link.url.endsWith(".json")) {
                    GalleryWidgetAttachment widget = new GalleryWidgetAttachment();
                    if (link.url.startsWith("//")) {
                        link.url = "https:" + link.url;
                    }
                    widget.sourceUrl = link.url;
                    URL widgetUrl = new URL(link.url);
                    URLConnection widgetDownload = widgetUrl.openConnection();

                    try {
                        widget.contents = IOUtils.toString(widgetDownload.getInputStream());
                        String cDisp = widgetDownload.getHeaderField("Content-Disposition");
                        if (cDisp != null && cDisp.indexOf("=") != -1 && cDisp.indexOf(".widget.json") != -1) {

                            widget.id = cDisp.split("=")[1].replaceAll("\"", "").replaceAll("]", "")
                                    .replaceAll(".widget.json", "");

                            item.widgets.add(widget);
                        }
                    } finally {
                        IOUtils.closeQuietly(widgetDownload.getInputStream());
                    }

                }
            }
        }

        return item;

    } finally {
        IOUtils.closeQuietly(connection.getInputStream());
    }
}

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From source file:com.juick.android.Utils.java

public static BINResponse getBinary(Context context, final String url, final Notification progressNotification,
        int timeout) {
    try {//ww w  . j a va  2  s  .c om
        if (url == null)
            return new BINResponse("NULL url", false, null);
        URLConnection urlConnection = new URL(url).openConnection();
        InputStream inputStream = urlConnection.getInputStream();
        BINResponse binResponse = streamToByteArray(inputStream, progressNotification);
        inputStream.close();
        String location = urlConnection.getHeaderField("Location");
        if (location != null) {
            return getBinary(context, location, progressNotification, timeout);
        }
        return binResponse;
    } catch (Exception e) {
        if (progressNotification instanceof DownloadErrorNotification) {
            ((DownloadErrorNotification) progressNotification)
                    .notifyDownloadError("HTTP connect: " + e.toString());
        }
        Log.e("getBinary", e.toString());
        return new BINResponse(e.toString(), true, null);
    }
}

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From source file:org.lockss.util.UrlUtil.java

/**
 * Return a list of header fields (in the format "key;fieldValue") for conn
 * @param conn URLConnection to get headers from
 * @return list of header fields (in the format "key;fieldValue") for conn
 * @throws IllegalArgumentException if a null conn is supplied
 *///  w w w .  j  ava2 s  . c o m
public static List getHeaders(URLConnection conn) {
    if (conn == null) {
        throw new IllegalArgumentException("Called with null URLConnection");
    }
    List returnList = new ArrayList();
    boolean done = false;
    for (int ix = 0; !done; ix++) {
        String headerField = conn.getHeaderField(ix);
        String headerFieldKey = conn.getHeaderFieldKey(ix);
        done = (headerField == null && headerFieldKey == null);
        if (!done) {
            returnList.add(headerFieldKey + ";" + headerField);
        }
    }
    return returnList;
}

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From source file:deincraftlauncher.IO.download.Downloader.java

public void prepare() { //generating: fileName, totalSize, 

    preparing = true;//w w  w  .j av a2  s .  co  m

    prepareThread = new Thread() {
        @Override
        public void run() {

            try {
                target = new URL(link);

                URLConnection targetCon = target.openConnection();

                totalSize = targetCon.getContentLength();

                String raw = targetCon.getHeaderField("Content-Disposition");

                if (raw != null && raw.contains("=")) {
                    fileName = raw.split("=")[1];
                    fileName = fileName.split(";")[0];
                } else {
                    fileName = "Unbekannt";
                }

                fileName = fileName.replaceAll("\"", "");

                System.out.println("Prepared Download: size: " + totalSize + " name=" + fileName);
                prepared = true;
                preparing = false;

                onPrepared.call(instance);

            } catch (MalformedURLException ex) {
                Logger.getLogger(Downloader.class.getName()).log(Level.SEVERE, null, ex);
            } catch (IOException ex) {
                Logger.getLogger(Downloader.class.getName()).log(Level.SEVERE, null, ex);
            }

        }
    };

    prepareThread.start();

}

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From source file:org.holistic.ws_proxy.WSProxyHelper.java

private void headers_endpoint2client(HttpServletResponse resp, URLConnection objURLConn) throws Exception {
    int m_iHeaderNumber = 1;
    String m_sHeaderName = objURLConn.getHeaderFieldKey(m_iHeaderNumber);
    for (String m_sHeaderValue = objURLConn.getHeaderField(m_iHeaderNumber); m_sHeaderName != null
            && m_sHeaderValue != null; m_sHeaderValue = objURLConn.getHeaderField(m_iHeaderNumber)) {
        if (m_sHeaderName.equalsIgnoreCase("Set-Cookie")) {
            String m_sCookie = objURLConn.getHeaderField(m_iHeaderNumber);
            if (m_sCookie != null && !m_sCookie.equals("")) {
                log.debug("EndPoint Cookie: " + m_sCookie);
                int m_posicion = m_sCookie.indexOf("=");
                String m_sCookieModificada = m_sCookie.substring(0, m_posicion) + EXTRA_COOKIE
                        + m_sCookie.substring(m_posicion);
                log.debug("Al cliente le transmito la cookie modificada: " + m_sCookieModificada);
                resp.addHeader("Set-Cookie", m_sCookieModificada);
            }//from w ww .j a v  a  2 s .c  o m
        } else if (!m_sHeaderName.equalsIgnoreCase("Content-Length")
                && !m_sHeaderName.equalsIgnoreCase("Transfer-Encoding")) {
            if (m_sHeaderName.equalsIgnoreCase("Cache-Control")
                    && m_sHeaderValue.equalsIgnoreCase("max-age=43200")) {
                //resp.addHeader(m_sHeaderName, "post-check=43200, pre-check=3600");
                //resp.addHeader(m_sHeaderName, "post-check=300, pre-check=420, must-revalidate");
                resp.addHeader(m_sHeaderName, "post-check=600, pre-check=601");
            } else {
                resp.addHeader(m_sHeaderName, m_sHeaderValue);
                log.debug("EndPointToClient HEADER[" + m_sHeaderName + "] - VALUE[" + m_sHeaderValue + "]");
            }
        }
        m_iHeaderNumber++;
        m_sHeaderName = objURLConn.getHeaderFieldKey(m_iHeaderNumber);
    }

}

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From source file:org.apache.jmeter.protocol.http.control.CacheManager.java

private boolean hasVaryHeader(URLConnection conn) {
    return conn.getHeaderField(HTTPConstants.VARY) != null;
}

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From source file:com.romeikat.datamessie.core.base.service.download.AbstractDownloader.java

protected Charset getCharset(final URLConnection urlConnection) {
    Charset charset = null;/*from  w  ww . jav  a2  s  . co  m*/
    // Prio 1: content encoding specified in header
    String encoding = urlConnection.getContentEncoding();
    // Prio 2: charset specified within content type (specified in header)
    if (encoding == null) {
        final String contentType = urlConnection.getHeaderField("Content-Type");
        if (contentType != null) {
            for (final String metaTagParameter : contentType.replace(" ", "").split(";")) {
                if (metaTagParameter.startsWith("charset=")) {
                    encoding = metaTagParameter.split("=", 2)[1];
                    break;
                }
            }
        }
    }
    // Prio 3: default charset
    if (encoding == null) {
        return Charset.defaultCharset();
    }
    // Create charset
    try {
        charset = Charset.forName(encoding);
    } catch (final Exception ex) {
        LOG.warn("Unsupported encoding " + encoding + " by " + urlConnection.getURL().toExternalForm(), ex);
    }
    // Fallback
    if (charset == null) {
        charset = Charset.defaultCharset();
    }
    // Done
    return charset;
}

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From source file:org.callimachusproject.xml.InputSourceResolver.java

/**
 * returns null for 404 resources./*from  w w  w  . j av  a 2s .c  o  m*/
 */
private InputSource resolveURL(String systemId) throws IOException {
    URLConnection con = new URL(systemId).openConnection();
    con.addRequestProperty("Accept", getAcceptHeader());
    con.addRequestProperty("Accept-Encoding", "gzip");
    try {
        String base = con.getURL().toExternalForm();
        String type = con.getContentType();
        String encoding = con.getHeaderField("Content-Encoding");
        InputStream in = con.getInputStream();
        if (encoding != null && encoding.contains("gzip")) {
            in = new GZIPInputStream(in);
        }
        return create(type, in, base);
    } catch (FileNotFoundException e) {
        return null;
    } catch (IOException e) {
        logger.warn("Could not resolve {}", systemId);
        throw e;
    }
}

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From source file:eionet.cr.staging.FileDownloader.java

/**
 * Derives a name for the file to be downloaded from the given {@link URLConnection}.
 *
 * @param connection The given {@link URLConnection}.
 * @return The derived file name.//from  ww w .ja  v  a  2  s. c  o  m
 */
private String getFileName(URLConnection connection) {

    // If file name already given, just return it.
    if (StringUtils.isNotBlank(newFileName)) {
        return newFileName;
    }

    // Attempt detection from the response's "Content-Disposition" header.
    String contentDisposition = connection.getHeaderField("Content-Disposition");
    if (StringUtils.isNotBlank(contentDisposition)) {
        String s = StringUtils.substringAfter(contentDisposition, "filename");
        if (StringUtils.isNotBlank(s)) {
            s = StringUtils.substringAfter(s, "=");
            if (StringUtils.isNotBlank(s)) {
                s = StringUtils.substringAfter(s, "\"");
                if (StringUtils.isNotBlank(s)) {
                    s = StringUtils.substringBefore(s, "\"");
                    if (StringUtils.isNotBlank(s)) {
                        return s.trim();
                    }
                }
            }
        }
    }

    // // Attempt detection from the response's "Content-Location" header.
    // String contentLocation = connection.getHeaderField("Content-Location");
    // if (StringUtils.isNotBlank(contentLocation)) {
    // String s = new File(contentLocation).getName();
    // if (StringUtils.isNotBlank(s)) {
    // return s.trim();
    // }
    // }
    //
    // Attempt detection from the URL itself.

    String s = StringUtils.substringAfterLast(connection.getURL().toString(), "#");
    if (StringUtils.isBlank(s)) {
        s = StringUtils.substringAfterLast(connection.getURL().toString(), "/");
    }

    if (StringUtils.isNotBlank(s)) {
        // Remove all characters that are not one of these: a latin letter, a digit, a minus, a dot, an underscore.
        s = s.replaceAll("[^a-zA-Z0-9-._]+", "");
    }

    // If still no success, then just generate a hash from the URL.
    return StringUtils.isBlank(s) ? DigestUtils.md5Hex(connection.getURL().toString()) : s;
}

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