Example usage for java.net URLConnection connect

Introduction

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

Prototype

public abstract void connect() throws IOException;

Source Link

Document

Opens a communications link to the resource referenced by this URL, if such a connection has not already been established.

Usage

From source file:net.sf.eclipsecs.core.config.configtypes.ConfigurationType.java

/**
 * {@inheritDoc}/*  w w w . ja  va 2s.  c  o m*/
 */
public CheckstyleConfigurationFile getCheckstyleConfiguration(ICheckConfiguration checkConfiguration)
        throws CheckstylePluginException {

    CheckstyleConfigurationFile data = new CheckstyleConfigurationFile();

    try {

        // resolve the true configuration file URL
        data.setResolvedConfigFileURL(resolveLocation(checkConfiguration));

        URLConnection connection = data.getResolvedConfigFileURL().openConnection();
        connection.connect();

        // get last modification timestamp
        data.setModificationStamp(connection.getLastModified());

        // get the configuration file data
        byte[] configurationFileData = getBytesFromURLConnection(connection);
        data.setCheckConfigFileBytes(configurationFileData);

        // get the properties bundle
        byte[] additionalPropertiesBytes = getAdditionPropertiesBundleBytes(data.getResolvedConfigFileURL());
        data.setAdditionalPropertyBundleBytes(additionalPropertiesBytes);

        // get the property resolver
        PropertyResolver resolver = getPropertyResolver(checkConfiguration, data);
        data.setPropertyResolver(resolver);

    } catch (IOException e) {
        CheckstylePluginException.rethrow(e);
    }

    return data;
}

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From source file:ubic.gemma.core.loader.expression.geo.service.GeoBrowser.java

/**
 * Retrieves and parses tab delimited file from GEO. File contains pageSize GEO records starting from startPage.
 *
 * @param startPage start page//from   www . j  a v  a2s  .  c om
 * @param pageSize  page size
 * @return list of GeoRecords
 * @throws IOException    if there is a problem while manipulating the file
 * @throws ParseException if there is a parsing problem
 */
public List<GeoRecord> getRecentGeoRecords(int startPage, int pageSize) throws IOException, ParseException {

    if (startPage < 0 || pageSize < 0)
        throw new IllegalArgumentException("Values must be greater than zero ");

    List<GeoRecord> records = new ArrayList<>();
    URL url;
    try {
        url = new URL(GEO_BROWSE_URL + startPage + GEO_BROWSE_SUFFIX + pageSize);
    } catch (MalformedURLException e) {
        throw new RuntimeException("Invalid URL: " + GEO_BROWSE_URL + startPage + GEO_BROWSE_SUFFIX + pageSize,
                e);
    }

    URLConnection conn = url.openConnection();
    conn.connect();
    try (InputStream is = conn.getInputStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(is))) {

        // We are getting a tab delimited file.

        // Read columns headers.
        String headerLine = br.readLine();
        String[] headers = StringUtil.csvSplit(headerLine);

        // Map column names to their indices (handy later).
        Map<String, Integer> columnNameToIndex = new HashMap<>();
        for (int i = 0; i < headers.length; i++) {
            columnNameToIndex.put(headers[i], i);
        }

        // Read the rest of the file.
        String line;
        while ((line = br.readLine()) != null) {
            String[] fields = StringUtil.csvSplit(line);

            GeoRecord geoRecord = new GeoRecord();
            geoRecord.setGeoAccession(fields[columnNameToIndex.get("Accession")]);
            geoRecord.setTitle(StringUtils.strip(
                    fields[columnNameToIndex.get("Title")].replaceAll(GeoBrowser.FLANKING_QUOTES_REGEX, "")));

            String sampleCountS = fields[columnNameToIndex.get("Sample Count")];
            if (StringUtils.isNotBlank(sampleCountS)) {
                try {
                    geoRecord.setNumSamples(Integer.parseInt(sampleCountS));
                } catch (NumberFormatException e) {
                    throw new RuntimeException("Could not parse sample count: " + sampleCountS);
                }
            } else {
                GeoBrowser.log.warn("No sample count for " + geoRecord.getGeoAccession());
            }
            geoRecord.setContactName(
                    fields[columnNameToIndex.get("Contact")].replaceAll(GeoBrowser.FLANKING_QUOTES_REGEX, ""));

            String[] taxons = fields[columnNameToIndex.get("Taxonomy")]
                    .replaceAll(GeoBrowser.FLANKING_QUOTES_REGEX, "").split(";");
            geoRecord.getOrganisms().addAll(Arrays.asList(taxons));

            Date date = DateUtils.parseDate(fields[columnNameToIndex.get("Release Date")]
                    .replaceAll(GeoBrowser.FLANKING_QUOTES_REGEX, ""), DATE_FORMATS);
            geoRecord.setReleaseDate(date);

            geoRecord.setSeriesType(fields[columnNameToIndex.get("Series Type")]);

            records.add(geoRecord);
        }

    }

    if (records.isEmpty()) {
        GeoBrowser.log.warn("No records obtained");
    }
    return records;

}

---

From source file:com.cellbots.communication.CustomHttpCommChannel.java

@Override
public void listenForMessages(final long waitTimeBetweenPolling, final boolean returnStream) {
    if (inUrl == null || doDisconnect)
        return;/*from   ww w  .  j ava 2  s . c o m*/
    stopReading = false;
    listenThread = new Thread(new Runnable() {
        @Override
        public void run() {
            Looper.prepare();
            while (!stopReading) {
                try {
                    if (waitTimeBetweenPolling >= 0)
                        Thread.sleep(waitTimeBetweenPolling);
                    if (commandUrl == null) {
                        commandUrl = new URL(inUrl);
                    }
                    URLConnection cn = commandUrl.openConnection();
                    cn.connect();
                    if (returnStream) {
                        if (mMessageListener != null) {
                            mMessageListener.onMessage(new CommMessage(null, cn.getInputStream(), null, null,
                                    null, mChannelName, CommunicationManager.CHANNEL_HTTP));
                        }
                    } else {
                        BufferedReader rd = new BufferedReader(new InputStreamReader(cn.getInputStream()),
                                1024);
                        String cmd = rd.readLine();
                        if (cmd != null && !cmd.equals(prevCmd) && mMessageListener != null) {
                            prevCmd = cmd;
                            // TODO (chaitanyag): Change this after we come
                            // up with a better protocol. The first (space
                            // separated) token in the command string could
                            // be a timestamp. This is useful if the same
                            // commands are sent back to back. For example,
                            // the controller sends consecutive "hu"
                            // (head up) commands to tilt the head up in
                            // small increments.
                            if (cmd.indexOf(' ') >= 0) {
                                try {
                                    Long.parseLong(cmd.substring(0, cmd.indexOf(' ')));
                                    cmd = cmd.substring(cmd.indexOf(' ') + 1);
                                } catch (NumberFormatException e) {
                                }
                            }
                            mMessageListener.onMessage(new CommMessage(cmd, null, null, null, null,
                                    mChannelName, CommunicationManager.CHANNEL_HTTP));
                        }
                    }
                    if (waitTimeBetweenPolling < 0) { // Do not repeat this loop
                        break;
                    }
                } catch (MalformedURLException e) {
                    Log.e(TAG, "Error processing URL: " + e.getMessage());
                } catch (IOException e) {
                    Log.e(TAG, "Error reading command from URL: " + commandUrl + " : " + e.getMessage());
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    });
    listenThread.start();
}

---

From source file:dk.netarkivet.common.distribute.HTTPRemoteFile.java

/**
 * Invalidate all file handles, by asking the remote registry to remove the
 * url for this remote file from the list of shared files.
 * Invalidating a file handle may delete the original files, if deletable.
 * This method does not throw exceptions, but will warn on errors.
 *///from  w ww.j  a v a  2  s.  c o  m
public void cleanup() {
    if (filesize == 0) {
        return;
    }
    try {
        URLConnection urlConnection = getRegistry().openConnection(getRegistry().getCleanupUrl(url));
        urlConnection.setUseCaches(false);
        urlConnection.connect();
        urlConnection.getInputStream();
    } catch (IOException e) {
        log.warn("Unable to cleanup file '" + file.getAbsolutePath() + "' with URL'" + url + "'", e);
    }
}

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From source file:com.nextgis.mobile.util.ApkDownloader.java

@Override
protected String doInBackground(String... params) {
    try {//w  ww.  ja  v  a 2s. com
        URL url = new URL(params[0]);
        mApkPath = Environment.getExternalStorageDirectory() + "/download/"
                + Uri.parse(params[0]).getLastPathSegment();
        URLConnection connection = url.openConnection();
        if (url.getProtocol().equalsIgnoreCase("https"))
            connection.setRequestProperty("Authorization", params[1]);

        connection.connect();
        int fileLength = connection.getContentLength() / 1024;
        InputStream input = new BufferedInputStream(connection.getInputStream());
        OutputStream output = new FileOutputStream(mApkPath);

        byte data[] = new byte[1024];
        long total = 0;
        int count;

        while ((count = input.read(data)) != -1) {
            total += count;
            publishProgress((int) total / 1024, fileLength);
            output.write(data, 0, count);
        }

        output.flush();
        output.close();
        input.close();

        return null;
    } catch (MalformedURLException e) {
        return mActivity.getString(R.string.error_invalid_url);
    } catch (IOException e) {
        return mActivity.getString(R.string.error_network_unavailable);
    }
}

---

From source file:net.hockeyapp.android.internal.CheckUpdateTask.java

@Override
protected JSONArray doInBackground(String... args) {
    try {//from  w  w w.  j  av  a 2s  . co  m
        int versionCode = getVersionCode();

        JSONArray json = new JSONArray(VersionCache.getVersionInfo(activity));
        if ((getCachingEnabled()) && (findNewVersion(json, versionCode))) {
            return json;
        }

        URL url = new URL(getURLString("json"));
        URLConnection connection = createConnection(url);
        connection.connect();

        InputStream inputStream = new BufferedInputStream(connection.getInputStream());
        String jsonString = convertStreamToString(inputStream);
        inputStream.close();

        json = new JSONArray(jsonString);
        if (findNewVersion(json, versionCode)) {
            return json;
        }
    } catch (Exception e) {
        e.printStackTrace();
    }

    return null;
}

---

From source file:me.hqm.plugindev.wget.WGCommand.java

/**
 * Get a URL from an input string.// w  ww .j a v a2 s .c  o  m
 *
 * @param input URL String
 * @return Valid URL
 */
private URL getUrl(String input) {
    // We only accept jar or zip files
    if (input.endsWith(".jar") || input.endsWith(".zip")) {
        // Try to create the object, and test the connection
        try {
            URI uri = new URI(input);
            URL url = uri.toURL();
            URLConnection conn = url.openConnection();
            conn.connect();
            // Return the url
            return url;
        } catch (IOException | URISyntaxException ignored) {
        }
    }
    // Failed, return null
    return null;
}

---

From source file:ubic.gemma.core.loader.expression.geo.service.GeoBrowser.java

/**
 * Performs an E-utilities query of the GEO database with the given searchTerms. Returns at most pageSize records
 * (if found) starting at record #start.
 *
 * @param start       start/* w w  w.  j a v  a  2 s.  co  m*/
 * @param pageSize    page size
 * @param searchTerms search terms
 * @return list of GeoRecords
 * @throws IOException if there is a problem while manipulating the file
 */
public List<GeoRecord> getGeoRecordsBySearchTerm(String searchTerms, int start, int pageSize)
        throws IOException, RuntimeException {

    List<GeoRecord> records = new ArrayList<>();
    URL searchUrl = new URL(
            GeoBrowser.ESEARCH + searchTerms + "&retstart=" + start + "&retmax=" + pageSize + "&usehistory=y");
    Document searchDocument;
    URLConnection conn = searchUrl.openConnection();
    conn.connect();
    try (InputStream is = conn.getInputStream()) {

        GeoBrowser.docFactory.setIgnoringComments(true);
        GeoBrowser.docFactory.setValidating(false);

        DocumentBuilder builder = GeoBrowser.docFactory.newDocumentBuilder();
        searchDocument = builder.parse(is);
    } catch (ParserConfigurationException | SAXException e) {
        throw new RuntimeException(e);
    }

    NodeList countNode = searchDocument.getElementsByTagName("Count");
    Node countEl = countNode.item(0);

    int count;
    try {
        count = Integer.parseInt(XMLUtils.getTextValue((Element) countEl));
    } catch (NumberFormatException e) {
        throw new IOException("Could not parse count from: " + searchUrl);
    }

    if (count == 0)
        throw new IOException("Got no records from: " + searchUrl);

    NodeList qnode = searchDocument.getElementsByTagName("QueryKey");

    Element queryIdEl = (Element) qnode.item(0);

    NodeList cknode = searchDocument.getElementsByTagName("WebEnv");
    Element cookieEl = (Element) cknode.item(0);

    String queryId = XMLUtils.getTextValue(queryIdEl);
    String cookie = XMLUtils.getTextValue(cookieEl);

    URL fetchUrl = new URL(GeoBrowser.EFETCH + "&mode=mode.text" + "&query_key=" + queryId + "&retstart="
            + start + "&retmax=" + pageSize + "&WebEnv=" + cookie);

    conn = fetchUrl.openConnection();
    conn.connect();
    Document summaryDocument;
    try (InputStream is = conn.getInputStream()) {
        DocumentBuilder builder = GeoBrowser.docFactory.newDocumentBuilder();
        summaryDocument = builder.parse(is);

        XPathFactory xFactory = XPathFactory.newInstance();
        XPath xpath = xFactory.newXPath();

        // Get relevant data from the XML file
        XPathExpression xaccession = xpath.compile("//DocSum/Item[@Name='GSE']");
        XPathExpression xtitle = xpath.compile("//DocSum/Item[@Name='title']");
        XPathExpression xnumSamples = xpath.compile("//DocSum/Item[@Name='n_samples']");
        XPathExpression xreleaseDate = xpath.compile("//DocSum/Item[@Name='PDAT']");
        XPathExpression xorganisms = xpath.compile("//DocSum/Item[@Name='taxon']");

        Object accessions = xaccession.evaluate(summaryDocument, XPathConstants.NODESET);
        NodeList accNodes = (NodeList) accessions;

        Object titles = xtitle.evaluate(summaryDocument, XPathConstants.NODESET);
        NodeList titleNodes = (NodeList) titles;

        Object samples = xnumSamples.evaluate(summaryDocument, XPathConstants.NODESET);
        NodeList sampleNodes = (NodeList) samples;

        Object dates = xreleaseDate.evaluate(summaryDocument, XPathConstants.NODESET);
        NodeList dateNodes = (NodeList) dates;

        Object organisms = xorganisms.evaluate(summaryDocument, XPathConstants.NODESET);
        NodeList orgnNodes = (NodeList) organisms;

        // Create GeoRecords using information parsed from XML file
        for (int i = 0; i < accNodes.getLength(); i++) {

            GeoRecord record = new GeoRecord();

            record.setGeoAccession("GSE" + accNodes.item(i).getTextContent());

            record.setTitle(titleNodes.item(i).getTextContent());

            record.setNumSamples(Integer.parseInt(sampleNodes.item(i).getTextContent()));

            Date date = DateUtil.convertStringToDate("yyyy/MM/dd", dateNodes.item(i).getTextContent());
            record.setReleaseDate(date);

            record.setOrganisms(this.getTaxonCollection(orgnNodes.item(i).getTextContent()));

            records.add(record);
        }

        if (records.isEmpty()) {
            GeoBrowser.log.warn("No records obtained");
        }
    } catch (ParserConfigurationException | ParseException | XPathExpressionException | SAXException e) {
        throw new IOException("Could not parse data: " + searchUrl, e);
    }
    return records;

}

---

From source file:ubic.gemma.loader.expression.geo.service.GeoBrowser.java

/**
 * Retrieves and parses tab delimited file from GEO. File contains pageSize
 * GEO records starting from startPage.//from  w ww .java  2s.c om
 * 
 * @param startPage
 * @param pageSize
 * @return list of GeoRecords
 * @throws IOException
 * @throws ParseException
 */
public List<GeoRecord> getRecentGeoRecords(int startPage, int pageSize) throws IOException, ParseException {

    if (startPage < 0 || pageSize < 0)
        throw new IllegalArgumentException("Values must be greater than zero ");

    List<GeoRecord> records = new ArrayList<GeoRecord>();
    URL url = null;
    try {
        url = new URL(GEO_BROWSE_URL + startPage + GEO_BROWSE_SUFFIX + pageSize);
    } catch (MalformedURLException e) {
        throw new RuntimeException("Invalid URL " + url, e);
    }

    InputStream is = null;

    try {
        URLConnection conn = url.openConnection();
        conn.connect();
        is = conn.getInputStream();
    } catch (IOException e) {
        log.error(e, e);
        throw e;
    }

    // We are getting a tab delimited file.
    BufferedReader br = new BufferedReader(new InputStreamReader(is));

    // Read columns headers.
    String headerLine = br.readLine();
    String[] headers = StringUtil.csvSplit(headerLine);

    // Map column names to their indices (handy later).
    Map<String, Integer> columnNameToIndex = new HashMap<String, Integer>();
    for (int i = 0; i < headers.length; i++) {
        columnNameToIndex.put(headers[i], i);
    }

    // Read the rest of the file.
    String line = null;
    while ((line = br.readLine()) != null) {
        String[] fields = StringUtil.csvSplit(line);

        GeoRecord geoRecord = new GeoRecord();
        geoRecord.setGeoAccession(fields[columnNameToIndex.get("Accession")]);
        geoRecord.setTitle(StringUtils
                .strip(fields[columnNameToIndex.get("Title")].replaceAll(FLANKING_QUOTES_REGEX, "")));

        String sampleCountS = fields[columnNameToIndex.get("Sample Count")];
        if (StringUtils.isNotBlank(sampleCountS)) {
            try {
                geoRecord.setNumSamples(Integer.parseInt(sampleCountS));
            } catch (NumberFormatException e) {
                throw new RuntimeException("Could not parse sample count: " + sampleCountS);
            }
        } else {
            log.warn("No sample count for " + geoRecord.getGeoAccession());
        }
        geoRecord
                .setContactName(fields[columnNameToIndex.get("Contact")].replaceAll(FLANKING_QUOTES_REGEX, ""));

        String[] taxons = fields[columnNameToIndex.get("Taxonomy")].replaceAll(FLANKING_QUOTES_REGEX, "")
                .split(";");
        geoRecord.getOrganisms().addAll(Arrays.asList(taxons));

        Date date = DateUtils.parseDate(
                fields[columnNameToIndex.get("Release Date")].replaceAll(FLANKING_QUOTES_REGEX, ""),
                DATE_FORMATS);
        geoRecord.setReleaseDate(date);

        geoRecord.setSeriesType(fields[columnNameToIndex.get("Series Type")]);

        records.add(geoRecord);
    }

    is.close();

    if (records.isEmpty()) {
        log.warn("No records obtained");
    }
    return records;

}

---

From source file:xtuaok.sharegyazo.HttpMultipartPostRequest.java

public String send() {
    URLConnection conn = null;
    String res = null;/*from  ww w  . j a  v  a2s  .c o  m*/
    try {
        conn = new URL(mCgi).openConnection();
        conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + BOUNDARY);
        ((HttpURLConnection) conn).setRequestMethod("POST");
        conn.setDoOutput(true);
        conn.connect();

        OutputStream os = conn.getOutputStream();
        os.write(createBoundaryMessage("imagedata").getBytes());
        os.write(mByteData);
        String endBoundary = "\r\n--" + BOUNDARY + "--\r\n";
        os.write(endBoundary.getBytes());
        os.close();

        InputStream is = conn.getInputStream();
        res = convertToString(is);
    } catch (Exception e) {
        Log.d(LOG_TAG, e.getMessage() + "");
    } finally {
        if (conn != null) {
            ((HttpURLConnection) conn).disconnect();
        }
    }
    return res;
}

---

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